Volume 5

Issue 02,2012

(8 articles)

Benoit C. St-Antoine1, David Ménard1 (), and Richard Martel2 ()

This work demonstrates that the position-dependent photoresponse of single-walled carbon nanotube (SWNT) films deposited on a glass substrate arises mainly from photothermoelectric effects.
2012, 5(2): 73–81

Zhiwen Shi1, Hongliang Lu1, Lianchang Zhang1, Rong Yang1, Yi Wang1, Donghua Liu1, Haiming Guo1, Dongxia Shi1, Hongjun Gao1, Enge Wang2, and Guangyu Zhang1()

Electromechanical switch devices employing suspended graphene as movable elements have been developed. Their on and off states can be controlled by modulating the electrostatic force applied to the graphene. The devices exhibit on–off ratios of up to 104 and lifetimes of over 500 cycles. The prototype device demonstrates the feasibility of using multilayer graphene in electromechanical systems.
2012, 5(2): 82–87

Bo Gao1, Yue Lin1, Sijie Wei1, Jie Zeng1,2, Yuan Liao1, Liuguo Chen1, David Goldfeld2, Xiaoping Wang1, Yi Luo1, Zhenchao Dong1 (), and Jianguo Hou1 ()

The charge transfer and retention behavior of directly coupled Au–CdSe nanohybrids has been studied by time-resolved photoluminescence. The fastest decay channel for the nanohybrids was found to correlate with the charge transfer from CdSe to Au nanoparticles, and photocatalytic experiments using methylene blue molecules show that the charge can be effectively retained in the Au nanoparticles for a timescale of hours.
2012, 5(2): 88–98

Jun Gao1, Wei Guo1 (), Hua Geng1, Xu Hou1, Zhigang Shuai2, and Lei Jiang1, 3 ()

In both solid and suspended few-layer mica membranes, solid-state nanopores have been micromechanically fabricated by layer-by-layer removal of mica monolayers with atomic force microscopy. The ultra-thin nanopores are geometrically asymmetric, like an inverted quadrangular frustum pyramid. The nanopore geometry can be well-controlled by finely tuning the fabrication parameters.
2012, 5(2): 99–108

Nian Liu1, Yan Yao2, Judy J. Cha2, Matthew T. McDowell2, Yu Han3, and Yi Cui2,4 ()

Silicon nanowires (SiNWs) have been successfully functionalized with metal–organic frameworks (MOFs) at room temperature by a step-by-step approach. The matching of the SiNW surface groups and the MOF coordinating groups is crucial for the conformal growth of MOFs on SiNWs. Furthermore, the morphology of the composite can easily be tuned by adjusting the solution concentration, immersion time, and growth temperature.
2012, 5(2): 109–116

Ivan A. Popov1, Konstantin V. Bozhenko2 (), and Alexander I. Boldyrev1 ()

Using adaptive natural density partitioning analysis we prove that graphene is aromatic, but its aromaticity is different from the aromaticity in benzene, coronene, or circumcoronene. Aromaticity in graphene is local with two-electrons delocalized over every hexagon ring.
2012, 5(2): 117–123

Elizaveta Panfilova1, Alexander Shirokov1, Boris Khlebtsov1,2 (), Larisa Matora1,2, and Nikolai Khlebtsov1,2

We report the first application of Ag nanocubes, Au/Ag alloy nanoparticles, and Au/Ag nanocages in a multiplexed dot immunoassay. The assay principle is based on the simultaneous staining of analyte drops on a nitrocellulose membrane strip by using multicolor nanoparticles conjugated with biospecific probing molecules.
2012, 5(2): 124–134

Haoxi Wu1,2, Ping Wang1, Haili He1,2, and Yongdong Jin1 ()

A facile synthesis of Ag/Au bimetallic hollow and porous nanoshells (HPNSs) with tunable optical resonance (from the visible to the near infrared (NIR) window) and catalytic properties is reported. The synthesis involves a two-step aqueous-phase method, using polycrystalline silver nanoparticles as starting templates and hydrogen peroxide as an etchant. The morphology (porosity) of the HPNSs plays a key role in the catalysis of the reduction of p-nitrophenol to p-aminophenol by NaBH4.
2012, 5(2): 135–144