Volume 5

Issue 06,2012

(8 articles)

Xavier Le Guével1, Christian Spies2, Nicole Daum3, Gregor Jung2, and Marc Schneider1()

Highly fluorescent silver nanoclusters have been prepared by a modified etching process and exhibit distinct fluorescence and lifetime properties. The strong and very high quantum yield together with a high photostability and biocompatibility makes the clusters perfectly suited as imaging labels.
2012, 5(6): 379–387

Justin Wu1, Liming Xie1, Guosong Hong1, Hong En Lim2, Boanerges Thendie2, Yasumitsu Miyata2, Hisanori Shinohara2, and Hongjie Dai1 ()

Semiconducting single-walled carbon nanotubes (s-SWNTs) with a purity of ~98% obtained by gel filtration of arc-discharge grown SWNTs with diameters in the range 1.2–1.6 nm have been inspected by multi-laser Raman spectroscopy. Several short channel multiple tube field-effect transistors with <15 tubes were able to reach on-currents of ~10 μA while maintaining on/off ratios of >104.
2012, 5(6): 388–394

Xiaoling Xiao1,4, Xiangfeng Liu1, Li Wang3, Hu Zhao1, Zhongbo Hu1, Xiangming He3, and Yadong Li2()

LiCoO2 nanoplates with exposed (001) planes have been successfully synthesized and shown to deliver high rate capabilities in lithium-ion batteries. Although the (001) plane of LiCoO2 is not electrochemically active, the charge/discharge capacity of LiCoO2 nanoplates can still reach 113 mA·h/g at 7 C after 100 cycles. The good rate capability results from cracks on the LiCoO2 nanoplates which are perpendicular to the (001) plane and favor fast Li+ transportation. In addition, these cracks facilitate access of the electrolyte to the internal surface throughout the electrode.
2012, 5(6): 395–401

Yanfeng Zhang1,2 (), Teng Gao2, Shubao Xie2, Boya Dai2, Lei Fu2, Yabo Gao2, Yubin Chen2, Mengxi Liu2, and Zhongfan Liu2 ()

Graphene growth on the same metal substrate with different crystal morphologies, such as single crystalline and polycrystalline, may involve different mechanisms. We deal with this issue by preparing graphene on single crystal Ni(111) and on Ni films using an ambient pressure chemical vapor deposition method, and analyze the different growth behaviors by scanning tunneling microscopy in combination with other methods. Interestingly, we obtained monolayer graphene on Ni(111), and multilayer graphene on Ni films under the same growth conditions. The possible mechanisms for the different growth behaviors are discussed. Especially, the effects of the inevitable Ni grain boundaries on polycrystalline Ni are addressed.
2012, 5(6): 402–411

Xue Wang1,2 Yong Ding1, Dajun Yuan3, Jung-Il Hong1, Yan Liu1, C. P. Wong1, Chenguo Hu2, and Zhong Lin Wang1 ()

Single-crystalline hollow ZnO nanospheres can be decorated on pre-synthesized ZnO nanowires after a pulse of laser irradiation, and the surface wettability of ZnO nanowire array can be changed from the original hydrophilic to hydrophobic. Fine ZnO nanotips can be obtained on the tops of ZnO nanospheres after a re-growth procedure.
2012, 5(6): 412–420

Peng Liu (), Yang Wei, Liang Liu, Kaili Jiang, and Shoushan Fan

Carbon nanotube array can be formed on the super-aligned carbon nanotube film on an 8-inch wafer. The combined carbon nanotube array on carbon nanotube film can realize the adsorbent-free field emission at only 10% duty heating.
2012, 5(6): 421–426

Caroline Celle (), Céline Mayousse, Eléonore Moreau, Henda Basti, Alexandre Carella, and Jean-Pierre Simonato ()

Flexible transparent thin film heaters (TTFHs) with excellent per- formances have been fabricated from solution-processable random networks of silver nanowires. The TTFHs can be fabricated on both glass and highly flexible polymer substrates. Heating performances were monitored at different applied voltages. The deposited silver amount necessary to fabricate TTFHs was estimated by inductively coupled plasma–optical emission spectroscopy measurements, and thermochromic displays have been realized.
2012, 5(6): 427–433

Yu Yu1,2, Changyan Cao1, Wei Li1, Ping Li1,2, Jin Qu1, and Weiguo Song1 ()

Anatase polyhedral structures with a high percentage of {001} facets have been synthesized by a low-cost route only using ammonium fluorotitanate ((NH4)2TiF6) and water as raw materials. All the samples exhibited high activities in the photocatalytic degradation of methylene blue dye under ultraviolet light irradiation.
2012, 5(6): 434–442