Volume 6

Issue 04,2013

(8 articles)

Baolai Liang1(), Ping-Show Wong1, Thai Tran2, Vitaliy G. Dorogan3, Yuriy I. Mazur3, Morgan E. Ware3, Gregory J. Salamo3, Chih-Kang Shih2, and Diana L. Huffaker1

InGaAs quantum disks (QDks) have been controllably formed on the top facet of nano-patterned GaAs pyramidal platforms, demonstrating a transition from zero-dimensional to two-dimensional quantum structures with the increase of QDk size. This transition provides the flexibility to continuously tailor the quantum confinement of nanostructures via site-controlled self-assembled epitaxy.
2013, 6(4): 235–242

Shuai Chen, Miao Wang, Jianfeng Ye, Jinguang Cai, Yurong Ma, Henghui Zhou (), and Limin Qi ()

A general method for facile kinetics-controlled solvothermal growth of aligned arrays of mesocrystalline SnO2 nanorods on arbitrary substrates has been developed by employing a unique ternary solvent system. When used as an anode material for lithium-ion batteries, mesocrystalline SnO2 nanorod arrays grown on Ti foil exhibit a reversible capacity of 720 mA·h/g at a current rate as high as 10 C.
2013, 6(4): 243–252

Yong Ding1,§, Fang Zhang1,§, and Zhong Lin Wang1,2 ()

By using high-angle annular dark-field scanning transmission electron microscope (HAADF-STEM) tomography, we have systematically reconstructed the three-dimensional (3D) structures of ZnO nanowires and nanobelts synthesized via vapor deposition. Further, by combining the 3D structure with its diffraction patterns, the growth direction and side surfaces of the nanowires and nanobelts were identified.
2013, 6(4): 253–262

Hideki Sato1,2, Stephanie E. Vasko1,3, and Marco Rolandi1 ()

We demonstrate inexpensive wafer scale direct-write of Ge and Si nanostructures with a modified mask aligner.
2013, 6(4): 263–268

Jessica Campos-Delgado1 (), Luiz G. Canado2, Carlos A. Achete3, Ado Jorio2, and Jean-Pierre Raskin1

Bilayer graphene samples with different twist angles have been studied by Raman spectroscopy. Our measurements in the 100–1700 cm–1 range reveal the appearance of features that have been successfully assigned to the different phonon branches in the phonon dispersion of graphene.
2013, 6(4): 269–274

Jie Zhang1,§, Fan Zhang2,§, Xuebing Zhao1, Xinran Wang3, Lifeng Yin4, Chongyun Liang2, Min Wang1, Ying Li1, Jiwei Liu1, Qingsong Wu1, and Renchao Che1 ()

The metastable wurtzite polymorph of the magnetic semiconductor MnSe has been synthesized via a colloidal approach and has tailored shapes and low-temperature surface spin-glass behavior.
2013, 6(4): 275–285

Wenchao Peng and Xiaoyan Li ()

A novel metal-free photocatalyst—sulfur/graphene (S/GR) composite—has been synthesized using a facile, one-pot hydrothermal method. The composite showed good activity for the photocatalytic degradation of methyl orange under both UV and solar light.
2013, 6(4): 286–292

Zhenyu Liu, Guoxin Zhang, Zhiyi Lu, Xiuyan Jin, Zheng Chang, and Xiaoming Sun ()

Porous carbon materials with high specific surface area and high nitrogen content have been prepared by a one-step pyrolysis of ethylenediaminetetraacetic acid (EDTA) and melamine in the presence of KOH and Co(NO3)2•6H2O. The as-prepared catalysts demonstrated high activity, stability, and four-electron selectivity for the oxygen reduction reaction (ORR), comparable to a commercial Pt/C catalyst, but with superior durability and better tolerance to methanol crossover.
2013, 6(4): 293–301