Volume 4

Issue 11,2011

(10 articles)

Sheng Xu and Zhong Lin Wang ()

This article gives a comprehensive review of the growth control and functional applications of one dimensional ZnO nanostructures prepared by wet chemical approaches.
2011, 4(11): 1013-1098

Caofeng Pan, Jun Luo, and Jing Zhu ()

Nanofuel and nanobiofuel cells which are integrated on an individual proton conductor nanowire represent a new self-powering approach in nanotechnology, and their power output is high enough to drive nanodevices for performing self- powered sensing. This study shows the feasibility of building self-powered nanosystems for biological sciences, environmental monitoring, defense technology, and even personal electronics.
2011, 4(11): 1099-1109

Dongdong Li1, Liang Zhao1, Ruqian Wu2, Carsten Ronning3, and Jia G. Lu1 ()

A semiconductor-to-metal transition is observed in Ga-doped ZnO nanowires under UV excitation due to enhanced Coulomb interaction and surface scattering associated with size confinement. As the temperature is varied, two distinct resistance peaks are observed. This originates from the trapping and detrapping processes in localized impurity states.
2011, 4(11): 1110-1116

Lihua Qian1,() and Ronobir Mookherjee1,2

A technique to assemble linear nanoparticle arrays with clean surfaces has been developed. The majority of the gaps between adjacent nanoparticles are several nm in size, making these arrays promising candidates for use as substrates for surface enhanced Raman scattering.
2011, 4(11): 1117-1128

Sung Hye Park1, Sung Hwan Jin1, Gwang Hoon Jun1, Seokwoo Jeon1(), and Soon Hyung Hong1()

Carbon nanotubes (CNTs) non-covalently functionalized by modified pyrene molecules with long alkyl chains become sufficiently hydrophobic to be well dispersed in poly(3-hexylthiophene) (P3HT). Organic thin-film transistors (OTFTs) made from such non-covalently functionalized CNT/P3HT nanocomposites with only 0.25 wt% addition of CNTs show 15 times enhancement of field effect mobility (1.5 × 10–2 cm2/(V•s)) compared to the mobility of OTFTs made from pure P3HT.
2011, 4(11): 1129-1135

Subramani Thiyagu, B. Parvathy Devi, and Zingway Pei ()

High density vertically aligned and high aspect ratio silicon nanowire (SiNW) arrays have been successfully fabricated on a Si substrate and exhibit ultra-low reflection and self-cleaning properties. A SiNW/poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (SiNW/PEDOT:PSS) heterojunction solar cell exhibits high photocurrent demonstrating the advantages of the SiNWs over a planar Si surface.
2011, 4(11): 1136-1143

Yongchun Lu1, Yanhong Lin1(), Dejun Wang1(), Lingling Wang1, 2, Tengfeng Xie1, and Tengfei Jiang1

Surface photovoltage measurements on cobalt-doped ZnO revealed that an electronic interaction was formed between the Co and ZnO, and that the incorporation of Co promoted the charge separation and enhanced the charge transfer ability and, at the same time, effectively inhibited the recombination of photogenerated charge carriers in ZnO, resulting in highly efficient photocatalytic activity in the degradation of alizarin red under visible light irradiation (λ > 420 nm).
2011, 4(11): 1044-1152

Ping Wang, Lei Han, Chengzhou Zhu, Yueming Zhai, and Shaojun Dong())

Ag–TiO2–reduced graphene oxide (rGO) and Pt–TiO2–rGO with particles well dispersed on rGO have been successfully synthesized by an aqueous solution-based method. The catalytic activity of the resulting products was studied by using the reduction of p-nitrophenol by NaBH4 as a model system. It was found that the Pt–TiO2–rGO nanostructure exhibits higher catalytic activity than Ag–TiO2–rGO or TiO2–rGO. Furthermore, it also exhibits excellent stability and easy recyclability, indicating great potential for applications in catalysis.
2011, 4(11): 1153-1162

Aniruddha Ray1, Xueding Wang2 (), Yongeun Koo Lee3, Hoe Jin Hah3, Gwangseong Kim3, Thomas Chen4, Daniel A. Orringer4, Oren Sagher4, Xiaojun Liu5, and Raoul Kopelman1,3 ()

A highly sensitive photoacoustic imaging technique, that is enhanced by tumor-targeting blue nanoparticles serving as a contrast agent,has been used to delineate brain tumors. Ex vivo experiments on phantoms and on rat brains demonstrate the high sensitivity of photoacoustic imaging in delineating tumors containing contrast agent at a concentration much lower than needed for visualization by the naked eye.
2011, 4(11): 1163-1173

Dominick J. Bindl, Adam S. Brewer, and Michael S. Arnold(),

Bulk heterojunction photovoltaic devices have been fabricated utilizing blends of polymer-wrapped semiconducting carbon nanotubes with the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester. Measured near-infrared power conversion efficiencies were in excess of 1.3% with peak external quantum efficiencies approaching 20%.
2011, 4(11): 1174-1179