Volume 4

Issue 08,2011

(10 articles)

Shuai Li§, Zheng Chang§, Junfeng Liu (), Lu Bai, Liang Luo, and Xiaoming Sun ()

A simple and efficient method has been developed to obtain nearly monodisperse Au nanorods with finely-tuned aspect ratios using the density gradient ultracentrifugation separation method. Separated Au NRs have size-dependent plasmon resonance peaks which lead to different surface-enhanced Raman scattering properties. This separation approach may also be extended to other rod-like nanomaterials in appropriate gradient media.
2011, 4(8): 723–728

Hailiang Wang, Yongye Liang, Tissaphern Mirfakhrai, Zhuo Chen, Hernan Sanchez Casalongue, and Hongjie Dai()

Asymmetrical supercapacitors have been fabricated by coupling a Ni(OH)2/graphene electrode with a RuO2/graphene electrode. Growth of Ni(OH)2 and RuO2 nanocrystals on high quality graphene sheets affords high-performance hybrid materials for supercapacitors, and the combination of the two materials leads to asymmetrical supercapacitors with high energy and power densities for energy storage applications.
2011, 4(8): 729–736

Zhe Xu1, Ke Yu1 (), Bo Li1, Rong Huang1, Ping Wu2, Huibing Mao1, Na Liao1, and Ziqiang Zhu1

Methods of fabrication of SiO2 and ZnO inverse structure replicas of butterfly wings are reported. The SiO2 replica can be regarded as a special optical component and the ZnO replica has the potential to be used in photoelectron devices.
2011, 4(8): 737–745

Randy Jalem, Ryosuke Koike, Yong Yang, Masanobu Nakayama, and Masayuki Nogami ()

The formation of single crystalline porous platinum nano¬particles, which is ensured by tailoring the reaction conditions, is reflected in their high catalytic activity towards methanol electro-oxidation.
2011, 4(8): 746–758

Lei Shi1, Leimei Sheng1 (), Liming Yu1, Kang An1, Yoshinori Ando2, and Xinluo Zhao1 ()

Double-walled carbon nanotubes (DWCNTs) with high graphitization and an average inner diameter of 0.9 nm and outer diameter of 1.6 nm have been produced on a large scale. These high purity, uniform and ultra-thin DWCNTs are a novel nanocontainer for preparing atomic wires, such as long linear carbon chains, and a good candidate for various applications in nanodevices.
2011, 4(8): 759–766

Xiaofeng Feng1,3, See Wee Chee2,4, Renu Sharma2,5, Kai Liu1, Xu Xie1,6, Qunqing Li1, Shoushan Fan1, and Kaili Jiang1 ()

According to in situ high resolution TEM observations, the catalytic gasification and growth of carbon nanotubes can be easily controlled by switching off and on the precursor gas respectively.
2011, 4(8): 767–779

Yuan Tian1, Chengmin Shen1, Chen Li1, Xuezhao Shi1,2, Yuan Huang1, and Hongjun Gao1 ()

Ellipsoidal monodisperse CoPt3 nanocrystals have been synthesized by a solvothermal method and used as catalysts to prepare large-area boron nanowires with diameters ranging from 30 to 50 nm and good field emission characteristics.
2011, 4(8): 780–787

Jacques Lefebvre () and Paul Finnie()

A single carbon nanotube inserted between a polarizer/analyser pair can be imaged in dark field using its strong birefringence.
2011, 4(8): 788–794

Jianfeng Shen, Min Shi, Bo Yan, Hongwei Ma, Na Li, and Mingxin Ye ()

A facile and efficient strategy for the preparation of TiO2–reduced graphene oxide (TiO2–RGO) composites using a modified one-pot hydrothermal method has been demonstrated. The resulting TiO2–RGO composites exhibited excellent photocatalysis of hydrogen evolution.
2011, 4(8): 795–806

Ying Tian1, Marina Y. Timmermans1, Samuli Kivist2, Albert G. Nasibulin1() , Zhen Zhu1, Hua Jiang1, Oleg G. Okhotnikov2, and Esko I. Kauppinen1()

CO2 as an etching agent etches carbon nanotube embryos with high curvature due to the inverse Boudouard reaction, subsequently suppressing the growth of small diameter tubes. The noticeable shift of the absorption peaks reveals that the diameters of the resulting single-walled carbon nanotubes are efficiently altered from 1.2 to 1.9 nm with increasing CO2 concentration.
2011, 4(8): 807–815