High capacity, reversible alloying reactions in SnSb/C nanocomposites for Na-ion battery applications
作者：
Xiao, Lifen;Cao, Yuliang;Xiao, Jie;Wang, Wei;Kovarik, Libor;...
期刊：
Chemical Communications ,2012年48(27):3321-3323 ISSN：1359-7345
通讯作者：
Liu, Jun
作者机构：
[Xiao, Jie; Wang, Wei; Xiao, Lifen; Cao, Yuliang; Kovarik, Libor; Liu, Jun; Nie, Zimin] Pacific NW Natl Lab, Richland, WA 99352 USA.;[Xiao, Lifen] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.;[Cao, Yuliang] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.
通讯机构：
[Liu, Jun] P;Pacific NW Natl Lab, Richland, WA 99352 USA.
摘要：
A new SnSb/C nanocomposite based on Na alloying reactions is demonstrated as anode for Na-ion battery applications. The electrode can achieve an exceptionally high capacity (544 mA h g(-1), almost double that of intercalation carbon materials), good rate capacity and cyclability (80% capacity retention over 50 cycles) for Na-ion storage.
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英文
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Development of cascade reactions for the concise construction of diverse heterocyclic architectures
作者：
Lu, Liang-Qiu;Chen, Jia-Rong;Xiao, Wen-Jing*
期刊：
ACCOUNTS OF CHEMICAL RESEARCH ,2012年45(8):1278-1293 ISSN：0001-4842
通讯作者：
Xiao, Wen-Jing
作者机构：
[Lu, Liang-Qiu; Xiao, Wen-Jing; Chen, Jia-Rong] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Xiao, Wen-Jing] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
摘要：
Heterocyclic structural architectures occur in many bioactive natural products and synthetic drugs, and these structural units serve as important intermediates in organic synthesis. This Account documents our recent progress in the development of cascade reactions to construct complex carbocycles and heterocycles. We describe the rational design of cascade reactions and in-depth investigations of their mechanism as well as their applications in the synthesis of drugs, natural products, and related molecular analogs.Relying on knowledge about the dipole-type reactivity of sulfur ylides, we have developed three different types of cascade reactions: a [4 + 1] annulation/rearrangement cascade, a [4 + 1]/[3 + 2] cycloaddition cascade, and a Michael addition/N-alkylation cascade. Using these processes, we can generate oxazolidinones, fused heterocycles, and pyrrolines starting with simple and readily available substances such as nitroolefins and unsaturated imines. We have also developed corresponding enantioselective reactions, which are guided by axial chirality and asymmetric H-bonding control. In addition, by relying on the reactivity characteristics of newly designed acrylate-linked nitroolefins, we have disclosed an asymmetric Michael/Michael/retro-Michael addition cascade using the combination of a protected hydroxylamine and a bifunctional organocatalyst. Using this methodology, we prepared chiral chromenes in good yields and with high enantioselectivities. Moreover, a series of double Michael addition cascade reactions with anilines, thiophenols, and benzotriazoles generated highly functionalized chromanes. Via mechanistically distinct cascade processes that start with vinyl-linked indoles, we have synthesized polycyclic indoles. Intermolecular cross-metathesis/intramolecular Friedel-Crafts alkylation cascades, promoted by either a single ruthenium alkylidene catalyst or a sequence involving Grubbs' ruthenium catalyst and MacMillan's imidazolidinone catalyst, converted ω-indolyl alkenes into tetrahydrocarbazoles, tetrahydropyranoindoles, and tetrahydrocarbolines. In addition, we constructed tetrahydrocarbazoles and tetrahydroquinones using organocatalytic Friedel-Crafts alkylation/Michael addition cascades that used 2-vinyl indoles as common starting materials.Most green plants carry out photosynthesis to produce organic substances relying on readily available and renewable solar energy. In a related manner, we have also developed two cascade reactions that merge visible light-induced aerobic oxidation with either [3 + 2] cycloaddition/oxidative aromatization or intramolecular cyclization. These processes lead to the formation of pyrrolo[2,1-a]isoquinolines and enantiopure tetrahydroimidazoles, respectively. © 2012 American Chemical Society.
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英文
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Porous structure dependent photoreactivity of graphitic carbon nitride under visible light
作者：
Dong, Guohui;Zhang, Lizhi*
期刊：
Journal of Materials Chemistry ,2012年22(3):1160-1166 ISSN：0959-9428
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Dong, Guohui] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
We demonstrate that graphitic carbon nitride can photoreduce CO2 to CO in the presence of water vapor and exhibit interesting porous structure dependent reactivity on photoreduction and photooxidation under visible light (λ > 420 nm). Graphitic carbon nitride was synthesized by directly heating the inexpensive melamine and the replacement of melamine with melamine hydrochloride could result in porousification in the final graphitic carbon nitride with much higher surface area (39 times) and more abundant pores, accompanied by a band gap increase of 0.13 eV. The porousification could significantly enhance the photoreactivity of graphitic carbon nitride in rhodamine B photooxidation by 9.4 times, but lower its activity in CO2 photoreduction by 4.6 times. The reasons for the porous structure dependent photoreactivity were investigated in detail. These new findings could shed light on the design of efficient photocatalysts and the tuning of their photoreactivity for environmental and energy applications.
语种：
英文
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Sodium ion insertion in hollow carbon nanowires for battery applications
作者：
Cao, Yuliang* ;Xiao, Lifen;Sushko, Maria L.;Wang, Wei;Schwenzer, Birgit;...
期刊：
NANO LETTERS ,2012年12(7):3783-3787 ISSN：1530-6984
通讯作者：
Cao, Yuliang
作者机构：
[Xiao, Jie; Sushko, Maria L.; Wang, Wei; Saraf, Laxmikant V.; Xiao, Lifen; Yang, Zhengguo; Cao, Yuliang; Schwenzer, Birgit; Liu, Jun; Nie, Zimin] Pacific NW Natl Lab, Richland, WA 99352 USA.;[Cao, Yuliang] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Elect Power Sources, Wuhan 430072, Peoples R China.;[Xiao, Lifen] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.;[Cao, Yuliang] Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA.
通讯机构：
[Cao, Yuliang] P;Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA.
关键词：
Hollow carbon nanowires;polyaniline nanowires;anode;sodium ion battery
摘要：
Hollow carbon nanowires (HCNWs) were prepared through pyrolyzation of a hollow polyaniline nanowire precursor. The HCNWs used as anode material for Na-ion batteries deliver a high reversible capacity of 251 mAh g -1 and 82.2% capacity retention over 400 charge-discharge cycles between 1.2 and 0.01 V (vs Na +/Na) at a constant current of 50 mA g -1 (0.2 C). Excellent cycling stability is also observed at an even higher charge-discharge rate. A high reversible capacity of 149 mAh g -1 also can be obtained at a current rate of 500 mA g -1 (2C). The good Na-ion insertion property is attributed to the short diffusion distance in the HCNWs and the large interlayer distance (0.37 nm) between the graphitic sheets, which agrees with the interlayered distance predicted by theoretical calculations to enable Na-ion insertion in carbon materials. © 2012 American Chemical Society.
语种：
英文
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SUPPRESSION OF HIGH TRANSVERSE MOMENTUM D MESONS IN CENTRAL PB-PB COLLISIONS AT ROOT S(NN)=2.76 TEV
作者：
Abelev, B.* ;Adam, J.;Adamova, D.;Adare, A. M.;Aggarwal, M. M.;...
期刊：
Journal of High Energy Physics ,2012年2012(9):1-37 ISSN：1029-8479
通讯作者：
Abelev, B.
作者机构：
[Garishvili, I.; Soltz, R.; Abelev, B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.;[Fernandez Tellez, A.; Vargas, A.; Canoa Roman, V.; Martinez, M. I.; Cortes Maldonado, I.; Vergara, S.; Rodriguez Cahuantzi, M.; Tejeda Munoz, G.] Benemerita Univ Autonoma Puebla, Puebla, Mexico.;[Alkin, A.; Ivanytskyi, O.; Grinyov, B.; Martynov, Y.; Zinovjev, G.; Zynovyev, M.; Bugaiev, K.] Bogolyubov Inst Theoret Phys, Kiev, Ukraine.;[Pestov, Y.] Budker Inst Nucl Phys, Novosibirsk 630090, Russia.;[Klay, J. L.] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA.
通讯机构：
[Abelev, B.] L;Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
关键词：
Heavy Ions
摘要：
The production of the prompt charm mesons D0, D+, D*+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the LHC, at a centre-of-mass energy
$ \sqrt{{{s_{\mathrm{NN}}}}}=2.76\;\mathrm{TeV} $
per nucleon-nucleon collision. The p
t-differential production yields in the range 2 < p
t < 16 GeV/c at central rapidity, |y| < 0.5, were used to calculate the nuclear modification factor R
AA with respect to a proton-proton reference obtained from the cross section measured at
$ \sqrt{s}=7\;\mathrm{TeV} $
and scaled to
$ \sqrt{s}=2.76\;\mathrm{TeV} $
. For the three meson species, R
AA shows a suppression by a factor 3–4, for transverse momenta larger than 5 GeV/c in the 20% most central collisions. The suppression is reduced for peripheral collisions.
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英文
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Guidelines for the use and interpretation of assays for monitoring autophagy
作者：
Klionsky, Daniel J.* ;Abdalla, Fabio C.;Abeliovich, Hagai;Abraham, Robert T.;Acevedo-Arozena, Abraham;...
期刊：
Autophagy ,2012年8(4):445-544 ISSN：1554-8627
通讯作者：
Klionsky, Daniel J.
作者机构：
[Brech, Andreas; Bridges, Dave; Lynch-Day, Melinda A.; Kim, John K.; Backues, Steven K.; Mao, Kai; Parzych, Katherine R.; Lin, Jiandie D.; Umekawa, Midori; Zhao, Mantong; Wang, Ke; Klionsky, Daniel J.; Gestwicki, Jason E.; Yen, Wei-Lien; Han, Ting; Bartholomew, Clinton R.; Jin, Meiyan; Nair, Usha] Univ Michigan, Inst Life Sci, Ann Arbor, MI 48109 USA.;[Lynch-Day, Melinda A.; Mao, Kai; Olsen, Laura J.; Parzych, Katherine R.; Zhao, Mantong; Wang, Ke; Jin, Meiyan] Univ Michigan, Dept Mol Cellular & Dev Biol, Ann Arbor, MI 48109 USA.;[Gestwicki, Jason E.] Univ Michigan, Dept Biol Chem, Ann Arbor, MI 48109 USA.;[Marcondes, Mateus; Abdalla, Fabio C.; Silva-Zacarin, Elaine; Silva-Zacarin, Elaine C. M.] Fed Univ Sao Carlos UFSCar, Lab Struct & Funct Biol, Sao Carlos, SP, Brazil.;[Abeliovich, Hagai] Hebrew Univ Jerusalem, Dept Biochem & Food Sci, IL-76100 Rehovot, Israel.
通讯机构：
[Klionsky, Daniel J.] U;Univ Michigan, Inst Life Sci, Ann Arbor, MI 48109 USA.
关键词：
Autolysosome;Autophagosome;Flux;LC3;Lysosome;Phagophore;Stress;Vacuole
摘要：
In 2008 we published the first set of guidelines for standardizing research in autophagy. Since then, research on this topic has continued to accelerate, and many new scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Accordingly, it is important to update these guidelines for monitoring autophagy in different organisms. Various reviews have described the range of assays that have been used for this purpose. Nevertheless, there continues to be confusion regarding acceptable methods to measure autophagy, especially in multicellular eukaryotes. A key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers or volume of autophagic elements (e.g., autophagosomes or autolysosomes) at any stage of the autophagic process vs. those that measure flux through the autophagy pathway (i.e., the complete process); thus, a block in macroautophagy that results in autophagosome accumulation needs to be differentiated from stimuli that result in increased autophagic activity, defined as increased autophagy induction coupled with increased delivery to, and degradation within, lysosomes (in most higher eukaryotes and some protists such as Dictyostelium) or the vacuole (in plants and fungi). In other words, it is especially important that investigators new to the field understand that the appearance of more autophagosomes does not necessarily equate with more autophagy. In fact, in many cases, autophagosomes accumulate because of a block in trafficking to lysosomes without a concomitant change in autophagosome biogenesis, whereas an increase in autolysosomes may reflect a reduction in degradative activity. Here, we present a set of guidelines for the selection and interpretation of methods for use by investigators who aim to examine macroautophagy and related processes, as well as for reviewers who need to provide realistic and reasonable critiques of papers that are focused on these processes. These guidelines are not meant to be a formulaic set of rules, because the appropriate assays depend in part on the question being asked and the system being used. In addition, we emphasize that no individual assay is guaranteed to be the most appropriate one in every situation, and we strongly recommend the use of multiple assays to monitor autophagy. In these guidelines, we consider these various methods of assessing autophagy and what information can, or cannot, be obtained from them. Finally, by discussing the merits and limits of particular autophagy assays, we hope to encourage technical innovation in the field. © 2012 Landes Bioscience.
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英文
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Recent advances in metal oxide-based electrode architecture design for electrochemical energy storage
作者：
Jiang, Jian;Li, Yuanyuan;Liu, Jinping* ;Huang, Xintang;Yuan, Changzhou;...
期刊：
Advanced Materials ,2012年24(38):5166-5180 ISSN：0935-9648
通讯作者：
Liu, Jinping
作者机构：
[Huang, Xintang; Liu, Jinping; Jiang, Jian] Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China.;[Lou, Xiong Wen (David); Yuan, Changzhou] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637457, Singapore.
通讯机构：
[Liu, Jinping] C;Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
摘要：
Metal oxide nanostructures are promising electrode materials for lithium-ion batteries and supercapacitors because of their high specific capacity/capacitance, typically 2-3 times higher than that of the carbon/graphite-based materials. However, their cycling stability and rate performance still can not meet the requirements of practical applications. It is therefore urgent to improve their overall device performance, which depends on not only the development of advanced electrode materials but also in a large part "how to design superior electrode architectures". In the article, we will review recent advances in strategies for advanced metal oxide-based hybrid nanostructure design, with the focus on the binder-free film/array electrodes. These binder-free electrodes, with the integration of unique merits of each component, can provide larger electrochemically active surface area, faster electron transport and superior ion diffusion, thus leading to substantially improved cycling and rate performance. Several recently emerged concepts of using ordered nanostructure arrays, synergetic core-shell structures, nanostructured current collectors, and flexible paper/textile electrodes will be highlighted, pointing out advantages and challenges where appropriate. Some future electrode design trends and directions are also discussed. The development of high-performance lithium-ion batteries/ supercapacitors relies on not only the use of advanced electrode materials but also the design of electrode architectures. This Review focuses on the recent advances in design of advanced metal oxide-based hybrid nanostructure electrode. Several recently emerged concepts of using ordered nanostructure arrays, synergetic core-shell structures, nanostructured current collectors, and flexible paper/textile electrodes are highlighted. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种：
英文
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Visible-light photoredox catalysis
作者：
Xuan, Jun;Xiao, Wen-Jing*
期刊：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION ,2012年51(28):6828-6838 ISSN：1433-7851
通讯作者：
Xiao, Wen-Jing
作者机构：
[Xiao, Wen-Jing; Xuan, Jun] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Xiao, Wen-Jing] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
关键词：
heterocycles;homogeneous catalysis;photocatalysis;radicals;synthetic methods
摘要：
In the last few years, visible-light initiated organic transformations have attracted increasing attention. The development of visible-light-promoted photocatalytic reactions, which enable rapid and efficient synthesis of fine chemicals, is highly desirable from the viewpoint of cost, safety, availability, and environmental friendliness. In this Minireview, recent advances made in this fast developing area of research are discussed. In the spotlight: The title catalysis is an area of research that is developing quickly and has become a powerful and efficient tool in synthetic organic chemistry (see picture, S=Substrates, P=Products). There is little doubt that continued exploration of visible light photoredox catalysis will uncover a wide range of fascinating and useful chemical reactions. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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英文
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CARBON SELF-DOPING INDUCED HIGH ELECTRONIC CONDUCTIVITY AND PHOTOREACTIVITY OF G-C3N4
作者：
Dong, Guohui;Zhao, Kun;Zhang, Lizhi*
期刊：
Chemical Communications ,2012年48(49):6178-6180 ISSN：1359-7345
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Dong, Guohui; Zhao, Kun] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
摘要：
We theoretically and experimentally demonstrate that carbon self-doping could induce intrinsic electronic and band structure change of g-C 3N 4via the formation of delocalized big π bonds to increase visible light absorption and electrical conductivity as well as surface area and thus enhance both photooxidation and photoreduction activities. © 2012 The Royal Society of Chemistry.
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英文
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A soft approach to encapsulate sulfur: Polyaniline nanotubes for lithium-sulfur batteries with long cycle life
作者：
Xiao, Lifen;Cao, Yuliang* ;Xiao, Jie;Schwenzer, Birgit;Engelhard, Mark H.;...
期刊：
Advanced Materials ,2012年24(9):1176-1181 ISSN：0935-9648
通讯作者：
Cao, Yuliang
作者机构：
[Xiao, Jie; Saraf, Laxmikant V.; Xiao, Lifen; Cao, Yuliang; Exarhos, Gregory J.; Schwenzer, Birgit; Engelhard, Mark H.; Liu, Jun; Nie, Zimin] Pacific NW Natl Lab, Richland, WA 99352 USA.;[Cao, Yuliang] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.;[Xiao, Lifen] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Cao, Yuliang] P;Pacific NW Natl Lab, Richland, WA 99352 USA.
关键词：
polyaniline;nanotubes;self-breathing;long cycle life;lithium-sulfur batteries
摘要：
A novel vulcanized polyaniline nanotube/sulfur composite was prepared successfully via an in situ vulcanization process by heating a mixture of polyaniline nanotube and sulfur at 280 °C. The electrode could retain a discharge capacity of 837 mAh g<sup>-1</sup> after 100 cycles at a 0.1 C rate and manifested 76% capacity retention up to 500 cycles at a 1 C rate. Copyright ©2012 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim.
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英文
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Highly efficient aerobic oxidative hydroxylation of arylboronic acids: Photoredox catalysis using visible light
作者：
Zou, You-Quan;Chen, Jia-Rong;Liu, Xiao-Peng;Lu, Liang-Qiu;Davis, Rebecca L.;...
期刊：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION ,2012年51(3):784-788 ISSN：1433-7851
通讯作者：
Jorgensen, Karl Anker
作者机构：
[Lu, Liang-Qiu; Xiao, Wen-Jing; Chen, Jia-Rong; Liu, Xiao-Peng; Zou, You-Quan] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Hubei, Peoples R China.;[Jorgensen, Karl Anker; Davis, Rebecca L.] Aarhus Univ, Dept Chem, Ctr Catalysis, DK-8000 Aarhus C, Denmark.;[Xiao, Wen-Jing] Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, Shanghai 200032, Peoples R China.;[Jorgensen, Karl Anker] Aarhus Univ, Dept Chem, Ctr Catalysis, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
通讯机构：
[Jorgensen, Karl Anker] A;Aarhus Univ, Dept Chem, Ctr Catalysis, Langelandsgade 140, DK-8000 Aarhus C, Denmark.
关键词：
boron;oxidation;photooxidation;ruthenium;synthetic methods
摘要：
To shed light on: The title reaction allows the generation of a variety of functionalized phenols and analogues using [Ru(bpy)<inf>3</inf>Cl <inf>2</inf>]·6 H<inf>2</inf>O as the photocatalyst under very mild reaction conditions. This reaction not only incorporates an oxygen atom from molecular oxygen directly into the product, but also expands the application of visible-light photocatalysis. bpy=bipyridine. Copyright ©2012 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim.
语种：
英文
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Three-dimensional tubular arrays of MnO2-NiO nanoflakes with high areal pseudocapacitance
作者：
Liu, Jinping;Jiang, Jian;Bosman, Michel;Fan, Hong Jin*
期刊：
Journal of Materials Chemistry ,2012年22(6):2419-2426 ISSN：0959-9428
通讯作者：
Fan, Hong Jin
作者机构：
[Liu, Jinping; Fan, Hong Jin] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore.;[Liu, Jinping; Jiang, Jian] Cent China Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Bosman, Michel] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore.;[Fan, Hong Jin] Nanyang Technol Univ ERI N, Energy Res Inst, Singapore 637553, Singapore.;[Fan, Hong Jin] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, 21 Nanyang Link, Singapore 637371, Singapore.
通讯机构：
[Fan, Hong Jin] N;Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, 21 Nanyang Link, Singapore 637371, Singapore.
摘要：
Transition metal oxide nanostructures are current research focus for energy storage applications. We herein report the synthesis of MnO<inf>2</inf>-NiO nanoflake-assembled tubular array on stainless steel substrate to function as pseudocapacitor electrode by programmed three-dimensional (3D) interfacial reactions, in which the ZnO nanowire array is employed as the low-cost in situ sacrificial template. In this 3D nanoelectrode, MnO<inf>2</inf> and NiO nanoflakes share the same "root" and form an integrated hierarchical structure, which adheres robustly to the substrate. Importantly, both MnO <inf>2</inf> and NiO contribute to the charge storage. The highly porous structure, which allows easy penetration of the electrolyte, gives additional merits. Detailed electrochemical characterization reveals that the assembled MnO<inf>2</inf>-NiO array exhibits good rate performance and cycle life. In particular, it displays an areal capacitance that is four orders of magnitude higher than that of carbonaceous materials and significantly superior to those of previous directly-grown pseudocapacitive nanostructure films. ©2012 The Royal Society of Chemistry.
语种：
英文
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Understanding the formation of CuS concave superstructures with peroxidase-like activity
作者：
He, Weiwei;Jia, Huimin;Li, Xiaoxiao;Lei, Yan;Li, Jing;...
期刊：
Nanoscale ,2012年4(11):3501-3506 ISSN：2040-3364
通讯作者：
Zheng, Zhi
作者机构：
[Mi, Liwei; Lei, Yan; Zhao, Hongxiao; Zheng, Zhi; He, Weiwei; Li, Xiaoxiao; Li, Jing; Jia, Huimin] Xuchang Univ, Key Lab Micronano Mat Energy Storage & Convers He, Inst Surface Micro & Nano Mat, Xuchang City 461000, Henan, Peoples R China.;[Zhang, Lizhi] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Zheng, Zhi] X;Xuchang Univ, Key Lab Micronano Mat Energy Storage & Convers He, Inst Surface Micro & Nano Mat, Xuchang City 461000, Henan, Peoples R China.
摘要：
Copper sulfide (CuS) concave polyhedral superstructures (CPSs) have been successfully prepared in an ethanolic solution by a simple solvothermal reaction without the use of surfactants or templates. Two typical well defined, high symmetry CuS concave polyhedrons, forming a concave truncated cuboctahedron and icosahedron were prepared. The effect of the reaction time, temperature and different Cu ion and sulfur sources on the formation of CuS CPSs were investigated and a possible formation mechanism was proposed and discussed based on gas chromatography-mass spectrometry. More importantly, we found, for the first time, that the CuS CPSs exhibit intrinsic peroxidase-like activity, as they can quickly catalyze the oxidation of typical horseradish peroxidase (HRP) substrates, 3,3',5,5'-tetramethylbenzidine (TMB) and o-phenylenediamine (OPD), in the presence of hydrogen peroxide. In addition to the recent discoveries regarding peroxidase mimetics on Fe<inf>3</inf>O<inf>4</inf> NPs and carbon nanostructures, our findings suggest a new kind of candidate for peroxidase mimics. This may open up a new application field of CuS micro-nano structures in biodetection, biocatalysis and environmental monitoring. ©2012 The Royal Society of Chemistry.
语种：
英文
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Co3 O4 nanowire@MnO2 ultrathin nanosheet core/shell arrays: A new class of high-performance pseudocapacitive materials
作者：
Liu, Jinping;Jiang, Jian;Cheng, Chuanwei;Li, Hongxing;Zhang, Jixuan;...
期刊：
Advanced Materials ,2011年23(18):2076-2081 ISSN：0935-9648
通讯作者：
Fan, Hong Jin
作者机构：
[Li, Hongxing; Liu, Jinping; Fan, Hong Jin; Cheng, Chuanwei] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore.;[Liu, Jinping; Jiang, Jian] Huazhong Normal Univ, Dept Phys, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;[Zhang, Jixuan; Gong, Hao] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore.
通讯机构：
[Fan, Hong Jin] N;Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore.
关键词：
energy storage;hybrid metal oxides;MnO2;nanowires;supercapacitors
摘要：
A smart hybrid nanowire array consisting of Co3O4 porous nanowire core and a MnO2 ultrathin nanosheet shell is fabricated using a general 3D interfacial carbon-assisted hydrothermal method. The array exhibits a high capacitance with good cycle performance and remarkable rate capability that is ranging among the best reported to date for hybrid metal oxide systems in the absence of a conducting matrix. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种：
英文
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Strange particle production in proton–proton collisions at √s = 0.9 TeV with ALICE at the LHC
作者：
Aamodt, K.* ;Abrahantes Quintana, A.;Adamova, D.;Adare, A. M.;Aggarwal, M. M.;...
期刊：
EUROPEAN PHYSICAL JOURNAL C ,2011年71(3):1-24 ISSN：1434-6044
通讯作者：
Aamodt, K.
作者机构：
[Skjerdal, K.; Huang, M.; Szostak, A.; Richter, M.; Klovning, A.; Ullaland, K.; Aamodt, K.; Nystrand, J.; Haaland, O.; Djuvsland, O.; Ovrebekk, G.; Larsen, D. T.; Rohrich, D.; Liu, L.; Fehlker, D.; Kanaki, K.; Wagner, B.] Univ Bergen, Dept Phys & Technol, Bergen, Norway.;[Abrahantes Quintana, A.; Shtejer, K.; Lopez Torres, E.] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba.;[Adamova, D.; Bielcikova, J.; Kushpil, S.; Kushpil, V.; Sumbera, M.] Acad Sci Czech Republ, Inst Nucl Phys, Prague, Czech Republic.;[Putschke, J.; Caines, H.; Aronsson, T.; Bruna, E.; Smirnov, N.; Hille, P. T.; Ma, R.; Harris, J. W.; Hicks, B.; Adare, A. M.; Heinz, M.] Yale Univ, New Haven, CT USA.;[Bhati, A. K.; Aggarwal, M. M.; Sharma, N.] Panjab Univ, Dept Phys, Chandigarh 160014, India.
通讯机构：
[Aamodt, K.] U;Univ Bergen, Dept Phys & Technol, Bergen, Norway.
关键词：
Transverse Momentum;Monte Carlo;Systematic Uncertainty;Time Projection Chamber;Primary Vertex
摘要：
The production of mesons containing strange quarks (K0 S, ϕ) and both singly and doubly strange baryons (⋀, ⊼, and Ξ− +Ξ+) are measured at mid-rapidity in pp collisions at √s = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at mid-rapidity for inelastic pp collisions are presented. For mesons, we report yields (〈dN/dy〉) of 0.184 ± 0.002(stat.) ± 0.006(syst.) for K0 S and 0.021 ± 0.004(stat.) ± 0.003(syst.) for ϕ. For baryons, we find 〈dN/dy〉 = 0.048 ± 0.001(stat.) ± 0.004(syst.) for ⋀, 0.047 ± 0.002(stat.) ± 0.005(syst.) for ⊼ and 0.0101 ± 0.0020(stat.) ± 0.0009(syst.) for Ξ− +Ξ+. The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions. © CERN for the benefit of the ALICE collaboration 2011.
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Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at √sNN=2.76TeV
作者：
Aamodt, K.* ;Abelev, B.;Abrahantes Quintana, A.;Adamova, D.;Adare, A. M.;...
期刊：
PHYSICAL REVIEW LETTERS ,2011年107(3):032301 ISSN：0031-9007
通讯作者：
Aamodt, K.
作者机构：
[Skjerdal, K.; Huang, M.; Szostak, A.; Richter, M.; Loenne, P. I.; Lien, J.; Ullaland, K.; Aamodt, K.; Nystrand, J.; Haaland, O.; Djuvsland, O.; Ovrebekk, G.; Larsen, D. T.; Rohrich, D.; Liu, L.; Fehlker, D.; Stokkevag, C. H.; Kanaki, K.; Wagner, B.] Univ Bergen, Dept Phys & Technol, Bergen, Norway.;[Soltz, R.; Abelev, B.] Lawrence Livermore Natl Lab, Livermore, CA USA.;[Abrahantes Quintana, A.; Shtejer, K.; Lopez Torres, E.] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba.;[Adamova, D.; Bielcikova, J.; Kushpil, S.; Kushpil, V.; Sumbera, M.] Acad Sci Czech Republ, Inst Nucl Phys, Prague, Czech Republic.;[Putschke, J.; Caines, H.; Aronsson, T.; Bruna, E.; Smirnov, N.; Hille, P. T.; Ma, R.; Harris, J. W.; Hicks, B.; Adare, A. M.; Heinz, M.] Yale Univ, New Haven, CT USA.
通讯机构：
[Aamodt, K.] U;Univ Bergen, Dept Phys & Technol, Bergen, Norway.
摘要：
We report on the first measurement of the triangular v3, quadrangular v4, and pentagonal v5 charged particle flow in Pb-Pb collisions at √sNN=2.76TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow v2 and v3 have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. We show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients. © 2011 American Physical society.
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Scale for the phase diagram of quantum chromodynamics
作者：
Gupta, Sourendu;Luo, Xiaofeng;Mohanty, Bedangadas* ;Ritter, Hans Georg;Xu, Nu
期刊：
Science ,2011年332(6037):1525-1528 ISSN：0036-8075
通讯作者：
Mohanty, Bedangadas
作者机构：
[Gupta, Sourendu] Tata Inst Fundamental Res, Dept Theoret Phys, Mumbai 400005, Maharashtra, India.;[Mohanty, Bedangadas] Ctr Variable Energy Cyclotron, Expt High Energy Phys & Applicat Grp, Kolkata 700064, India.;[Luo, Xiaofeng] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China.;[Luo, Xiaofeng; Ritter, Hans Georg; Xu, Nu] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.;[Xu, Nu] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
通讯机构：
[Mohanty, Bedangadas] C;Ctr Variable Energy Cyclotron, Expt High Energy Phys & Applicat Grp, 1 AF Bidhan Nagar, Kolkata 700064, India.
摘要：
Matter described by quantum chromodynamics (QCD), the theory of strong interactions, may undergo phase transitions when its temperature and the chemical potentials are varied. QCD at finite temperature is studied in the laboratory by colliding heavy ions at varying beam energies. We present a test of QCD in the nonperturbative domain through a comparison of thermodynamic fluctuations predicted in lattice computations with the experimental data of baryon number distributions in high-energy heavy ion collisions. This study provides evidence for thermalization in these collisions and allows us to find the crossover temperature between normal nuclear matter and a deconfined phase called the quark gluon plasma. This value allows us to set a scale for the phase diagram of QCD.
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Strange particle production in proton-proton collisions at root s=0.9 TeV with ALICE at the LHC
作者：
Aamodt, K.;Abrahantes Quintana, A.;Adamova, D.;Adare, A. M.;Aggarwal, M. M.;...
期刊：
EUROPEAN PHYSICAL JOURNAL C ,2011年71(3) ISSN：1434-6044
作者机构：
[Skjerdal, K.; Huang, M.; Szostak, A.; Richter, M.; Klovning, A.; Ullaland, K.; Aamodt, K.; Nystrand, J.; Haaland, O.; Djuvsland, O.; Ovrebekk, G.; Larsen, D. T.; Rohrich, D.; Liu, L.; Fehlker, D.; Kanaki, K.; Wagner, B.] Univ Bergen, Dept Phys & Technol, Bergen, Norway.;[Abrahantes Quintana, A.; Shtejer, K.; Lopez Torres, E.] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba.;[Adamova, D.; Bielcikova, J.; Kushpil, S.; Kushpil, V.; Sumbera, M.] Acad Sci Czech Republ, Inst Nucl Phys, Prague, Czech Republic.;[Putschke, J.; Caines, H.; Aronsson, T.; Bruna, E.; Smirnov, N.; Hille, P. T.; Ma, R.; Harris, J. W.; Hicks, B.; Adare, A. M.; Heinz, M.] Yale Univ, New Haven, CT USA.;[Bhati, A. K.; Aggarwal, M. M.; Sharma, N.] Panjab Univ, Dept Phys, Chandigarh 160014, India.
摘要：
The production of mesons containing strange quarks (K-S(0), phi) and both singly and doubly strange baryons (Lambda, (Lambda) over bar, and Xi(-) + (Xi) over bar (+)) are measured at mid-rapidity in pp collisions at root s = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at mid-rapidity for inelastic pp collisions are presented. For mesons, we report yields (< dN/dy >) of 0.184 +/- 0.002(stat.) +/- 0.006(syst.) for K-S(0) and 0.021 +/- 0.004(stat.) +/- 0.003(syst.) for phi. For baryons, we find < dN/dy > = 0.048 +/- 0.001(stat.) +/- 0.004(syst.) for Lambda, 0.047 +/- 0.002(stat.) +/- 0.005(syst.) for (Lambda) over bar and 0.0101 +/- 0.0020(stat.) +/- 0.0009(syst.) for Xi(-) + (Xi) over bar (+). The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions.
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Centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at √sNN=2.76TeV
作者：
Aamodt, K.* ;Quintana, A. Abrahantes;Adamova, D.;Adare, A. M.;Aggarwal, M. M.;...
期刊：
PHYSICAL REVIEW LETTERS ,2011年106(3):032301 ISSN：0031-9007
通讯作者：
Aamodt, K.
作者机构：
[Skjerdal, K.; Huang, M.; Szostak, A.; Roehrich, D.; Richter, M.; Klovning, A.; Ullaland, K.; Aamodt, K.; Nystrand, J.; Haaland, O.; Djuvsland, O.; Ovrebekk, G.; Larsen, D. T.; Liu, L.; Fehlker, D.; Wagner, B.] Univ Bergen, Dept Phys & Technol, Bergen, Norway.;[Shtejer, K.; Quintana, A. Abrahantes] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba.;[Adamova, D.; Bielcikova, J.; Kushpil, S.; Kushpil, V.; Sumbera, M.] Acad Sci Czech Republ, Inst Nucl Phys, Prague, Czech Republic.;[Putschke, J.; Caines, H.; Aronsson, T.; Bruna, E.; Smirnov, N.; Hille, P. T.; Ma, R.; Harris, J. W.; Hicks, B.; Adare, A. M.; Heinz, M.] Yale Univ, New Haven, CT USA.;[Bhati, A. K.; Aggarwal, M. M.; Sharma, N.] Panjab Univ, Dept Phys, Chandigarh 160014, India.
通讯机构：
[Aamodt, K.] U;Univ Bergen, Dept Phys & Technol, Bergen, Norway.
摘要：
The centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at √sNN=2.76TeV is presented. The charged-particle density normalized per participating nucleon pair increases by about a factor of 2 from peripheral (70%-80%) to central (0%-5%) collisions. The centrality dependence is found to be similar to that observed at lower collision energies. The data are compared with models based on different mechanisms for particle production in nuclear collisions. © 2011 American Physical Society.
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Functionalized graphene oxide as a nanocarrier in a multienzyme labeling amplification strategy for ultrasensitive electrochemical immunoassay of phosphorylated p53 (s392)
作者：
Du, Dan;Wang, Limin;Shao, Yuyan;Wang, Jun;Engelhard, Mark H.;...
期刊：
Analytical Chemistry ,2011年83(3):746-752 ISSN：0003-2700
通讯作者：
Lin, Yuehe
作者机构：
[Wang, Limin; Shao, Yuyan; Du, Dan; Lin, Yuehe; Wang, Jun; Engelhard, Mark H.] Pacific NW Natl Lab, Richland, WA 99352 USA.;[Du, Dan] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Lin, Yuehe] P;Pacific NW Natl Lab, Richland, WA 99352 USA.
摘要：
P53 phosphorylation plays an important role in many biological processes and might be used as a potential biomarker in clinical diagnoses. We report a new electrochemical immunosensor for ultrasensitive detection of phosphorylated p53 at Ser392 (phospho-p53392) based on graphene oxide (GO) as a nanocarrier in a multienzyme amplification strategy. Greatly enhanced sensitivity was achieved by using the bioconjugates featuring horseradish peroxidase (HRP) and p53392 signal antibody (p53392Ab 2) linked to functionalized GO (HRP-p53392Ab 2-GO) at a high ratio of HRP/p53392Ab2. After a sandwich immunoreaction, the HRP-p53392Ab2-GO captured onto the electrode surface produced an amplified electrocatalytic response by the reduction of enzymatically oxidized thionine in the presence of hydrogen peroxide. The increase of response current was proportional to the phospho-p53392 concentration inthe range of 0.02-2 nM with the detection limit of 0.01 nM, which was 10-fold lower than that of the traditional sandwich electrochemical measurement for p53392. The amplified immunoassay developed in this work shows acceptable stability and reproducibility, and the assay results for phospho-p53392 spiked in human plasma also show good recovery (92-103.8%). This simple and low-cost immunosensor shows great promise for detection of other phosphorylated proteins and clinical applications. © 2011 American Chemical Society.
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