Volume 8

Issue 09,2015

(31 articles)


Song Bai1, Chengming Wang1 (*), Wenya Jiang1, Nana Du1, Jing Li1, Junteng Du1, Ran Long1, Zhengquan Li2, and Yujie Xiong1 (*)

A method has been developed to synthesize hybrid structures between PtPd bimetallic nanocages and graphene by employing selective epitaxial growth of single-crystal Pt shells on Pd nano- cubes supported on reduced graphene oxide (rGO), followed by Pd etching. The hollow nature, {100} surface facets and bimetallic composition of the PtPd nanocages, together with the good conductivity and stability of graphene, enable high electrocatalytic performance in the oxygen reduction reaction (ORR).
2015, 8(9): 2789–2799

Albert G. Nasibulin1,2,3 (*), Adinath M. Funde3,4, Ilya V. Anoshkin3, and Igor A. Levitsky5,6 (*)

All-carbon nanotube (CNT) diode and solar cells formed from macroscopic films are fabricated by simple mechanical displacement. Schottky barriers are statistically created in the contact area between the semiconducting and quasi-metallic bundles consisting of several high quality tubes. Photovoltaic response is observed for n-doped CNT films allowing for the development of all-CNT macroscopic solar cells.
2015, 8(9): 2800–2809

Li Deng, Xiaolei Wang, Yun Kuang, Cheng Wang, Liang Luo (*), Fang Wang, and Xiaoming Sun (*)

A method of hydrophilicity gradient ultracentrifugation to sort non-sedimental carbon nanodots (CDs) is established. The CDs are pre-treated with acetone to form clusters and then “de-cluster” as they are forced to sediment through the media, according to their differences in hydrophilicity.
2015, 8(9): 2810–2821

Haining Chong1,2, Guodong Wei2, Huilin Hou2, Huijun Yang1, Minghui Shang2, Fengmei Gao2, Weiyou Yang2 (*), and Guozhen Shen3 (*)

The purpose of this study is to develop high-performance solar- blind UV photodetectors based on electrospun TiO2-ZnTiO3 heterojunction nanowires with wide-range UV photoresponse, high sensitivity, excellent cycle stability, and the ability to operate at high temperatures.
2015, 8(9): 2822–2832

Pablo Ferrando-Villalba1, Aitor F. Lopeandía1 (*), Francesc Xavier Alvarez2 (*), Biplab Paul1,Carla de Tomás2, Maria Isabel Alonso3, Miquel Garriga3, Alejandro R. Goi3,4, Jose Santiso5, Gemma Garcia1, and Javier Rodriguez-Viejo1 (*)

We present a novel approach for customizing thermal transport across Si/Si1–xGex superlattices (SLs) with well-defined compositional gradients. The spatial inhomogeneity has a remarkable effect on the heat-flow propagation, reducing the thermal conductivity and providing a new path to tailor the thermal transport.
2015, 8(9): 2833–2841

Santiago J. Cartamil-Bueno1 (*), Peter G. Steeneken1 (*), Frans D. Tichelaar2, Efren Navarro-Moratalla3, Warner J. Venstra1, Ronald van Leeuwen1, Eugenio Coronado3, Herre S.J. van der Zant1, Gary A. Steele1, and Andres Castellanos-Gomez1, (*)

A laser-oxidation technique to fabricate tantalum oxide mechanical resonators with large built-in stress is demonstrated. The oxidized tantalum resonators exhibited enhanced quality factors (14 times larger) and resonance frequencies (9 times larger) compared with pristine (prior to laser oxidation) layered TaSe2 resonators.
2015, 8(9): 2842–2849

Xing Zhong1,§, Gongming Wang1,§, Benjamin Papandrea1, Mufan Li1, Yuxi Xu1, Yu Chen2, Chih-Yen Chen1, Hailong Zhou1, Teng Xue2, Yongjia Li2, Dehui Li1 ,Yu Huang2,3, and Xiangfeng Duan1,3 (*)

We report a hybrid photocatalyst fabricated by wrapping silicon nanowires with reduced graphene oxide sheets to achieve greatly enhanced photoactivity and superior photoelectrochemical stability.
2015, 8(9): 2850–2858

Stuart J. Corr1,2,3,§ (*), Mustafa Raoof2,4,§, Brandon T. Cisneros2,3,5,§, Alvin W. Orbaek3, Matthew A. Cheney1,2,3, Justin J. Law1,3, Nadia C. Lara1,3, Andrew R. Barron3,6, Lon J. Wilson3, and Steven A. Curley1,2,7

Aqueous suspensions of metallic and semiconducting single-walled carbon nanotubes exhibit high heating rates when exposed to radiofrequency (RF) (13.56 MHz) electric fields. The heating was examined as a function of the conductivity of the host medium, which was modulated using NaCl. The results may aid in developing heating agents for non-invasive RF cancer hyperthermia.
2015, 8(9): 2859–2870

Hongxu Chen1, Tieqiang Wang2, Huaizhong Shen1, Wendong Liu1, Shuli Wang1, Kun Liu1, Junhu Zhang1 (*), and Bai Yang1

Ag nanoparticle/polymer composite barcode nanorods with a well- defined number of segments, height, and density of Ag NPs were fabricated by the integration of colloidal lithography, selective ion-exchange, and the in situ reduction of Ag+.
2015, 8(9): 2871–2880

Yanshuo Zhang1,2,§, Jianping Shi1,2,§, Gaofeng Han3, Minjie Li2, Qingqing Ji2, Donglin Ma2, Yu Zhang1,2, Cong Li1,2, Xingyou Lang3 (*), Yanfeng Zhang1,2 (*), and Zhongfan Liu2

Monolayer WS2 triangles were synthesized on Au foils using a facile chemical vapor deposition method, with the edge lengths tunable from ~100 to ~1,000 nm. The as-grown WS2 samples on Au foils were directly applied as electrocatalysts in the hydrogen evolution reaction.
2015, 8(9): 2881–2890