Volume 2

Issue 03,2009

(9 articles)

Xudong Wang1,2 , Yifan Gao1 , Yaguang Wei1 , and Zhong Lin Wang1 ()
1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA
2Department of Materials Science and Engineering, University of Wisconsin at Madison, Madison, Wisconsin 53706, USA
Xudong Wang1,2 , Yifan Gao1 , Yaguang Wei1 , and Zhong Lin Wang1 ()

The output of an ultrasonic wave driven nanogenerator (NG) has been shown to depend on the excitation conditions and geometry. Incidence angle tests indicate that the effective area of an NG determines the amount of power that can be generated. The output power of an NG is also directly related to its distance from the ultrasonic source.
2009, 2: 177-182

Sandeep Ghosh1,2and C. N. R. Rao1,2 ()

Reaction with a diazonium salt followed by fluorous extraction enables separation of semiconducting and metallic single walled carbon nanotubes.
2009, 2: 183-191

Ganhua Lu1 , Shun Mao1 , Sungjin Park2 , Rodney S. Ruoff2, and Junhong Chen1()

Graphene oxide sheets have been successfully decorated with aerosol Ag nanocrystals at room temperature using electrostatic force directed assembly. Ripening of Ag nanocrystals was observed after annealing the Ag-graphene oxide hybrid structure in Ar. Schematics (top panel) are not to scale.
2009, 2: 192-200

Bin Liu and Hua Chun Zeng()

Single-crystal enclosed ZnO nanotubes can be grown by a direct wet chemical approach. A concave growth front can either remain unaltered or undergo a concave-to-convex transformation, leading to the growth of solid nanorods and/or hollow nanotubes.
2009, 2: 201-209

Xiao Chen, Jing Jing Zhang, Jie Xuan, and Jun Jie Zhu()

The numerous individual light nanodots are gold nanoparticles (AuNPs) on the grey carbon spheres (CNs), indicating that well-dispersed AuNPs decorate the CNs surface quite uniformly. The material may be employed as an effective substrate for immobilization of myoglobin for use in biosensors.
2009, 2: 210-219

Edakkattuparambil Sidharth Shibu 1, Madathumpady Abubaker Habeeb Muhammed1 , Keisaku Kimura2 , and Thalappil Pradeep1()
and Thalappil Pradeep1()

Preparation of dansyl glutathione capped gold nanoparticle superlattices with two distinct morphologies and showing intense emission in the visible NIR region is reported. Stacking of nanoparticles in these crystals is studied by TEM and SAXS. Fluorescence images of the crystals.
2009, 2: 220-234

Xianghua Kong1 , Shengbin Lei 2, Yanlian Yang2 , Ke Deng2 , Guicun Qi2, and Chen Wang2()

A phase transition from an ordered packing arrangement with fourfold symmetry at negative bias to a random arrangement at positive bias was observed for a self-assembly of Lu2Pc3 molecules. Molecular switching behaviour by a bias-polarity-induced fl ipping process was demonstrated and confi rmed by the shift of the peak in dI/dV versus V curves for individual Lu2Pc3 molecules when the voltage scanning direction was reversed.
2009, 2: 235-241

Chunfeng Xue, Bo Tu(), and Dongyuan Zhao()

A simple approach for hierarchically porous monolithic materials with different mesostructure is demonstrated by organic organic coassembly of the precursors on the 3-dimensional interconnected network of PU foam scaffold. The strategy is also a good candidate for mass production of mesostructured materials especially for the coassembly process in which the gas-liquid interface is required.
2009, 2: 242-253

Miao Yu1,†, Wei Xu1,†, Youness Benjalal2,3, Regis Barattin2, Erik Lægsgaard1, Ivan Stensgaard1, Mohamed Hliwa2,3, Xavier Bouju2, André Gourdon2, Christian Joachim2, Trolle R. Linderoth1 (*), and Flemming Besenbacher1 (*)

By means of scanning tunneling microscopy (STM) imaging and manipulation we investigate the morphology and anchoring of a specially designed Lander molecule on Cu(110) and Au(111) substrates. We conclude that Au(111) may be the more suitable substrate for the self-assembly of this Lander molecule since the weaker molecule–substrate interaction will be beneficial for the formation of ordered molecular architectures mainly driven by intermolecular interactions.
2009, 2: 254-259
Published: 13 April 2009