List of Issues |  09 , 2012   |  Previous Issue  |  Next Issue

       
Below >>

Ultra-Stable Oligonucleotide每Gold and 每Silver Nanoparticle Conjugates Prepared by a Facile Silica Reinforcement Method

Jacky K. F. Wong1, Shea Ping Yip2, and Thomas M. H. Lee1 ()
 
1 Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
2 Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China

DOI 10.1007/s12274-012-0244-z

Nano Res. 2012, 5(9): 585每594

Address correspondence to ming-hung.lee@polyu.edu.hk

Oligonucleotide每gold and 每silver nanoparticle conjugates with exceptionally high chemical stability have been synthesized by a simple silica reinforcement method. The silica-modified conjugates become highly stable against aggregation induced by ligand exchange reaction (dithiothreitol) as well as dissolution by sodium cyanide.

    

Solution-Processed Bulk Heterojunction Solar Cells Based on Interpenetrating CdS Nanowires and Carbon Nanotubes

Zhen Li1, Jinquan Wei1, Peixu Li1, Luhui Zhang2, Enzheng Shi2, Chunyan Ji2, Jiang Liu1, Daming Zhuang1, hendong Liu3, Ji Zhou3, Yuanyuan Shang4, Yibin Li4, Kunlin Wang1, Hongwei Zhu1, Dehai Wu1, and Anyuan Cao2 ()


1 Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2 Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
3 State Key Laboratory of New Ceramics and Fine Processing and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
4 Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China

DOI 10.1007/s12274-012-0245-y

Nano Res. 2012, 5(9): 595每604

Address correspondence to anyuan@pku.edu.cn

Bulk heterojunction solar cells have been fabricated by mixing CdS nanowires (CdS NWs) and single-walled carbon nanotubes (CNTs) to form a composite film with mutually interpenetrating networks through a simple solution每filtration process, and show up to three orders of magnitude increase in photocurrent and cell efficiency compared to cells with the same materials arranged in a stacked layer configuration with a plain heterojunction.

    

Graphene每Nickel Cobaltite Nanocomposite Asymmetrical Supercapacitor with Commercial Level Mass Loading

Huanlei Wang1,2, Chris M. B. Holt1,2, Zhi Li1,2 (*), Xuehai Tan1,2, Babak Shalchi Amirkhiz1,2, Zhanwei Xu1,2, Brian C. Olsen1,2, Tyler Stephenson1,2, and David Mitlin1,2 (*)


1 Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
2 National Institute for Nanotechnology (NINT), National Research Council of Canada, Edmonton, Alberta T6G 2M9, Canada

DOI 10.1007/s12274-012-0246-X

Nano Res. 2012, 5(9): 605每617

Address correspondence to David Mitlin, dmitlin@ualberta.ca; Zhi Li, lizhicn@gmail.com

A high performance asymmetric electrochemical supercapacitor with a mass loading of 10 mg﹞cm每2 on each planar electrode has been fabricated by using a graphene每nickel cobaltite nanocomposite as a positive electrode and commercial activated carbon as a negative electrode. The capacitor exhibits favorable energy and power densities, and 102% capacitance retention at over 10000 cycles.

    

Synthesis of Spatially Uniform Metal Alloys Nanocrystals via a Diffusion Controlled Growth Strategy: The Case of Au每Pd Alloy Trisoctahedral Nanocrystals with Tunable Composition

Jiawei Zhang, Lei Zhang, Yanyan Jia, Guangxu Chen, Xue Wang, Qin Kuang (), Zhaoxiong Xie (), and Lansun Zheng

Department of Chemistry & State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

DOI 10.1007/s12274-012-0247-9

Nano Res. 2012, 5(9): 618每629

Address correspondence to Zhaoxiong Xie, zxxie@xmu.edu.cn; Qin Kuang, qkuang@xmu.edu.cn

Trisoctahedral Au每Pd alloy nanocrystals (NCs) with uniform spatial distributions and different compositions have been prepared under diffusion control. The compositions of the alloy can be tuned by varying the ratio of the precursors in the synthesis mixture. The stoichiometric value of the Au:Pd ratio cannot exceed 3:1, which could be due to the formation of thermodynamically stable Au3Pd phase intermediates. The alloy NCs containing 14.1 atom % Pd exhibit best activity for electrooxidation of ethanol.

    

Chiral Guanosine 5,-Monophosphate-Capped Gold Nanoflowers: Controllable Synthesis, Characterization, Surface-Enhanced Raman Scattering Activity, Cellular Imaging and Photothermal Therapy

Peng Huang1,2,∫, Omar Pandoli1,∫, Xiansong Wang1, Zhe Wang2,3, Zhiming Li4, Chunlei Zhang1, Feng Chen1, Jing Lin1, Daxiang Cui1 (), and Xiaoyuan Chen2 ()


1 National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute of Micro-Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
2 Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, Maryland 20892, USA
3 Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen, 361005, China
4 Institute of Dermatology and Department of Dermatology at No. 1 Hospital, Wenzhou Medical College, Wenzhou 325000, China
These authors equally contributed to this article

DOI 10.1007/s12274-012-0248-8

Nano Res. 2012, 5(9): 630每639

Address correspondence to Daxiang Cui, dxcui@sjtu.edu.cn; Xiaoyuan Chen, Shawn.Chen@nih.gov

We report a simple one-pot green synthesis of chiral gold nanoflowers (GNFs) with abundant petal-shaped tips in a chiral reduction environment resulting from the presence of chiral guanosine 5'-monophosphate (5'-GMP) and the chiral reducing agent L-ascorbic acid (L-AA). Different reducing agents can impact the shape and chirality of the products and the size and chirality of the GNFs can also be controlled by adjusting the reaction time. The as-synthesized GNFs with good biocompatibility can be used for surface-enhanced Raman scattering (SERS) enhancement, cellular dark-field imaging and photothermal therapy.

    

Facile Preparation of Carbon Nanotubes and Graphene Sheets by a Catalyst-Free Refluxing Approach

Jinyong Wang, Li Wei, Fei Peng, and Yan Li ()
 
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, Key Laboratory for the Physics and Chemistry of Nanodevices, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

DOI 10.1007/s12274-012-0249-7

Nano Res. 2012, 5(9): 640每645

Address correspondence to yanli@pku.edu.cn

A facile catalyst-free one-step approach has been developed for the preparation of carbon nanotubes and graphene sheets at ambient pressure and ~230 oC.

    

Modulating Lateral Strain in GaN-Based Epitaxial Layers by Patterning Sapphire Substrates with Aligned Carbon Nanotube Films

Hao Long1,∫, Yang Wei2,∫, Tongjun Yu1 (), Zhe Wang1, Chuanyu Jia1, Zhijian Yang1, Guoyi Zhang1, and Shoushan Fan2 ()


1 State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
2 Department of Physics and Tsinghua每Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China
These authors contributed equally to this work

DOI 10.1007/s12274-012-0250-1

Nano Res. 2012, 5(9): 646每653

Address correspondence to Tongjun Yu, tongjun@pku.edu.cn; Shoushan Fan, fss-dmp@tsinghua.edu.cn

Strain modulation and reduction have been achieved in GaN using a carbon nanotube-patterned sapphire substrate (CPSS), and the nanoheteroepitaxy induced by small size nucleation islands of about 50 nm is ascribed to this significant strain modulation. When using CPSS instead of a conventional sapphire substrate, the crystalline quality of GaN was improved and the performance of the light emitting diodes (LEDs) was enhanced.

    

Formation of CdSe/CdS/ZnS每Au/SiO2 Dual-Yolk/Shell Nanostructures through a Trojan-Type Inside-Out Etching Strategy

Ching-Mao Huang1, Shih-Hsun Cheng1, U-Ser Jeng2, Chung-Shi Yang3, and Leu-Wei Lo1 ()
 
1 Division of Medical Engineering, Health Research Institutes, Zhunan, Miaoli 350
2 Synchrotron Radiation Research Center, Hsinchu 300
3 Center for Nanomedicine Researcher, Health Research Institutes, Zhunan, Miaoli 350

DOI 10.1007/s12274-012-0229-y

Nano Res. 2012, 5(9): 654每666

Address correspondence to lwlo@nhri.org.tw

An new class of yolk/shell nanostructures featuring encapsulation of binary semiconductor每metal (CdSe/CdS/ZnS每Au) hybrid nanocrystals in permeable hollow silica nanospheres have been prepared by taking advantage of aurate hydroxyl complexes [Au(OH)4] simultaneously as an Au precursor for the formation of CdSe/CdS/ZnS每Au hybrid crystals and as a catalyst carrier for the directional Trojan-like inside-out hydrolysis of silica.

    

Copyright Nano Research   |   Contact Us