Volume 7

Issue 12,2014

(15 articles)


Yi Liu1,2, Jun-Jie Yin2, and Zhihong Nie1 (*)

The self-assembly of nanoparticle (NP) ensembles from NP building blocks and their application in cancer imaging and therapy are summarized. Because of the new and advanced collective properties, the NP ensembles show many advantages over existing individual NP-based theranostic systems.
2014, 7(12): 1719–1730

Wenxu Zhang (*), Zhishuo Huang, Wanli Zhang, and Yanrong Li

Out of 14 MX2 two-dimensional (2D) semiconductors, MoTe2, HfSe2 and ZrSe2, are promising regarding to their possible high mobility and finite band gap by density functional theory calculations. The phonon limited mobility can be above 2,500 cm2·V–1·s–1 at room temperature.
2014, 7(12): 1731–1737

Gi Dae Park1, Jong-Heun Lee1, Jung-Kul Lee2 (*), and Yun Chan Kang1 (*)

In this study, polymeric precursors are employed for the first time in the large scale production of yolk–shell powders with multi shells using a spray drying process.
2014, 7(12): 1738–1748

Sai Bai1,§, Zhongwei Wu2,§, Xiaojing Wu3, Yizheng Jin1 (*), Ni Zhao3,4, Zhihui Chen1, Qingqing Mei1, Xin Wang1, Zhizhen Ye1, Tao Song2, Ruiyuan Liu2, Shuit-tong Lee2, and Baoquan Sun2 (*)

We demonstrate highly efficient, stable and reproducible planar heterojunction perovskite solar cells with impressive power- conversion efficiencies (PCEs) up to 15.9%. The superior device performance is achieved by optimizing film processing to preserve the long charge carrier diffusion lengths of the perovskite films and integrating interlayers of ZnO nanocrystals to improve the cathode interface.
2014, 7(12): 1749–1758

V. Senthilkumar1, Le C. Tam1, Yong Soo Kim1,2 (*), Yumin Sim3, Maeng-Je Seong3, and Joon. I. Jang2

Large area, highly crystalline good quality MoS2 layers have been synthesized by optimizing the amounts of the precursors, sulfur and MoO3. The sample showed strong and direct excitonic emissions at 1.82 eV (A-exciton, with a normalized PL intensity of ~55 × 103) and 1.98 eV (B-exciton, with a normalized PL intensity of ~5 × 103) at room temperature. Field-effect transistors have been fabricated using the MoS2 layers and their electrical properties characterized.
2014, 7(12): 1759–1768

Slawomir Prucnal1 (*), Markus Glaser2, Alois Lugstein2, Emmerich Bertagnolli2, Michael Stger-Pollach3, Shengqiang Zhou1, Manfred Helm1,4, Denis Reichel1, Lars Rebohle1, Marcin Turek5, Jerzy Zuk5, and Wolfgang Skorupa1

III–V/Si hetero-nanowires have been fabricated by liquid-phase epitaxy using ion beam implantation and millisecond range flash- lamp annealing. As an example, the image shows InAs segments integrated into the Si NWs.
2014, 7(12): 1769–1776

Gui Chen§, Xuming Xie§, and Guozhen Shen (*)

Flexible organic–inorganic hybrid photodetectors have been fabricated on various flexible substrates for the first time with n-type phenyl-C61-butyric acid methyl ester (PCBM) and p-type pearl-like GaP nanowires, and shown to exhibit high mechanical flexibility, good folding strength, excellent electrical stability and fast response.
2014, 7(12): 1777–1787

Siwei Tang1,2, Ivan Kravchenko2, Jieyu Yi1,2, Guixin Cao2, Jane Howe3, David Mandrus1 (*), and Zheng Gai2 (*)

The thickness of the SiO2 layer on the Si substrate plays the key role in obtaining high yield growth of cubic B20 MnSi skyrmion nanowires. A growth phase diagram was constructed based on systematic studies of various growth conditions.
2014, 7(12): 1788–1796

Hui Xia1,2 (*), Wen Xiong1,2, Chiew Keat Lim3, Qiaofeng Yao4, Yadong Wang3 (*), and Jianping Xie4 (*)

Hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core–branch arrays have been synthesized via a stepwise hydrothermal approach. The hybrid array electrodes exhibited a large reversible capacity (~800 mA·h·g–1 for specific mass capacity and ~750 μA·h·cm–2 for specific areal capacity), good cycling stability, and high rate capability, making them promising for application in microbatteries.
2014, 7(12): 1797–1808

Chuanlong Han, Shiping Wang, Jing Wang, Mingming Li, Jiang Deng, Haoran Li, and Yong Wang (*)

N-doped hollow core–disordered mesoporous shell carbonaceous nanospheres (HCDMSs) have been synthesized from a sustainable biomass (glucosamine hydrochloride). The obtained materials possess suitable nitrogen contents (~6.7–4.4 wt.%), high specific surface areas (770 m2·g–1), controlled size (~450–50 nm), and tunable shell thickness (~70–10 nm). To our excitement, these HCDMSs exhibited striking electrocatalytic activity for the oxygen reduction reaction, which was free from the crossover effect, and its long- term durability was superior to that of commercial Pt/C (20 wt.%).
2014, 7(12): 1809–1819