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Harnessing the collective properties of nanoparticle ensembles for cancer theranostics

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

1 Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
2 Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD 20740, USA

DOI 10.1007/s12274-014-0541-9

Nano Research 2014, 7(12): 1719每1730

Address correspondence to znie@umd.edu

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.

    

Two-dimensional semiconductors with possible high room temperature mobility

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

State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic and Technology of China, Chengdu 610054, China.

DOI 10.1007/s12274-014-0532-x

Nano Research 2014, 7(12): 1731每1737

Address correspondence to xwzhang@uestc.edu.cn

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每1﹞s每1 at room temperature.

    

Effect of esterification reaction of citric acid and ethylene glycol on the formation of multi-shelled cobalt oxide powders with superior electrochemical properties

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

1 Department of Materials Science and Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea
2 Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea

DOI 10.1007/s12274-014-0533-9

Nano Research 2014, 7(12): 1738每1748

Address correspondence to Jung-Kul Lee, jkrhee@konkuk.ac.kr; Yun Chan Kang, yckang@korea.ac.kr

In this study, polymeric precursors are employed for the first time in the large scale production of yolk每shell powders with multi shells using a spray drying process.

    

High-performance planar heterojunction perovskite solar cells: Preserving long charge carrier diffusion lengths and interfacial engineering

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 (*)

1 State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Department of Materials Science and Engineering, and Center for Chemistry of High-Performance and Novel Materials, Zhejiang University, Hangzhou 310027, China
2 Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren*ai Road, Suzhou 215123, China
3 Department of Electronic Engineering, the Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
4 Shenzhen Research Institute, the Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
Both authors contributed equally to this work.

DOI 10.1007/s12274-014-0534-8

Nano Research 2014, 7(12): 1749每1758

Address correspondence to Yizheng Jin, yizhengjin@zju.edu.cn; Baoquan Sun, bqsun@suda.edu.cn

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.

    

Direct vapor phase growth process and robust photo- luminescence properties of large area MoS2 layers

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

1 Department of Physics and Energy Harvest Storage Research Center (EHSRC), University of Ulsan, Ulsan 680-749, South Korea
2 Department of Physics, Applied Physics and Astronomy, Binghamton University, New York 13902, USA
3 Department of Physics, Chung-Ang University, Seoul 156-756, South Korea

DOI 10.1007/s12274-014-0535-7

Nano Research 2014, 7(12): 1759每1768

Address correspondence to yskim2@mail.ulsan.ac.kr

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.

    

III每V semiconductor nanocrystal formation in silicon nanowires via liquid-phase epitaxy

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

1 Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, Dresden 01314, Germany
2 Institute of Solid State Electronics, Vienna University of Technology, Floragasse 7, Vienna 1040, Austria
3 USTEM, Vienna University of Technology, Wiedner Hauptstraße 8-10, Vienna 1040, Austria
4 Center for Advancing Electronics Dresden, Technische Universität Dresden, Dresden 01062, Germany
5 Maria Curie-Sklodowska University, Pl. M. Curie-Sklodowskiej 1, Lublin 20-035, Poland

DOI 10.1007/s12274-014-0536-6

Nano Research 2014, 7(12): 1769每1776

Address correspondence to s.prucnal@hzdr.de

III每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.

    

Flexible organic每inorganic hybrid photodetectors with n-type phenyl-C61-butyric acid methyl ester (PCBM) and p-type pearl-like GaP nanowires

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

State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China G. Chen and X. Xie are visiting students from Huazhong University of Science and Technology. They contributed equally to this work.

DOI 10.1007/s12274-014-0537-5

Nano Research 2014, 7(12): 1777每1787

Address correspondence to gzshen@semi.ac.cn.

Flexible organic每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.

    

Growth of skyrmionic MnSi nanowires on Si: Critical importance of the SiO2 layer

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

1 Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA
2 Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
3 Hitachi High Technologies Inc., Rexdale, ON M9W 6A4, Canada

DOI 10.1007/s12274-014-0538-4

Nano Research 2014, 7(12): 1788每1796

Address correspondence to Zheng Gai, gaiz@ornl.gov; David Mandrus, dmandrus@utk.edu

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.

    

Hierarchical TiO2-B nanowire@汐-Fe2O3 nanothorn core每 branch arrays as superior electrodes for lithium-ion microbatteries

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

1 School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2 Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Xiaolingwei 200, Nanjing 210094, China
3 School of Engineering, Nanyang Polytechnic, 180 Ang Mo Kio Ave 8, Singapore 569830
4 Department of Chemical & Biomolecular Engineering, Faculty of Engineering, National University of Singapore, Singapore, 117585

DOI 10.1007/s12274-014-0539-3

Nano Research 2014, 7(12): 1797每1808

Address correspondence to Hui Xia, xiahui@njust.edu.lcn; Yadong Wang, wang_yadong@nyp.edu.sg; Jianping Xie, chexiej@nus.edu.sg

Hierarchical TiO2-B nanowire@汐-Fe2O3 nanothorn core每branch arrays have been synthesized via a stepwise hydrothermal approach. The hybrid array electrodes exhibited a large reversible capacity (~800 mA﹞h﹞g每1 for specific mass capacity and ~750 米A﹞h﹞cm每2 for specific areal capacity), good cycling stability, and high rate capability, making them promising for application in microbatteries.

    

Controlled synthesis of sustainable N-doped hollow core每mesoporous shell carbonaceous nanospheres from biomass

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

Carbon Nano Materials Group, Center for Chemistry of High-performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou 310028, China

DOI 10.1007/s12274-014-0540-x

Nano Research 2014, 7(12): 1809每1819

Address correspondence to chemwy@zju.edu.cn

N-doped hollow core每disordered mesoporous shell carbonaceous nanospheres (HCDMSs) have been synthesized from a sustainable biomass (glucosamine hydrochloride). The obtained materials possess suitable nitrogen contents (~6.7每4.4 wt.%), high specific surface areas (770 m2﹞g每1), controlled size (~450每50 nm), and tunable shell thickness (~70每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.%).

    

Ageing mechanisms and reliability of graphene-based electrodes

Yuanyuan Shi, Yanfeng Ji, Fei Hui, Hai-Hua Wu, and Mario Lanza (*)

Institute of Functional Nano & Soft Materials, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China

DOI 10.1007/s12274-014-0542-8

Nano Research 2014, 7(12): 1820每1831

Address correspondence to mlanza@suda.edu.cn

New concept ageing and reliability tests performed on graphene- based electrodes reveal that a non-negligible thin oxide layer can form on its pristine surface, which affects its electronic properties.

    

Design of molecule-based magnetic conductors

Naureen Akhtar1, Graeme R. Blake1, Roberto Felici2, Heinz Amenitsch3, Thomas T.M. Palstra1, and Petra Rudolf1 (*)

1 Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, NL-9747AG Groningen, The Netherlands
2 ESRF, BP 220, F-38043 Grenoble Cedex 9, France
3 Institute of Inorganic Chemistry, Graz University of Technology, Stremayerg. 9/IV, A-8010 Graz, Austria

DOI 10.1007/s12274-014-0543-7

Nano Research 2014, 7(12): 1832每1842

Address correspondence to p.rudolf@rug.nl

An artistic view of a flexible organic每inorganic hybrid thin film system made up of layers of conducting bis(ethylenedioxy) tetrathiafulvalene (BEDO-TTF) alternating with layers of transition metal ion complexes grown in layer-by-layer fashion under ambient conditions. The growth strategy developed for these molecule-based magnetic conductors is versatile, puts no limit on the type of substrate (plastic, glass, metal foil) and can be adapted for other functionalities through the choice of the inorganic species.

    

Synthesis and TEM structural characterization of C60-flattened carbon nanotube nanopeapods

Qing Wang1, Ryo Kitaura1 (*), Yuta Yamamoto2, Shigeo Arai2, and Hisanori Shinohara1 (*)

1 Department of Chemistry & Institute for Advanced Research, Nagoya University, Nagoya 464-8602, Japan
2 High Voltage Electron Microscope Laboratory, Ecotopia Science Institute, Nagoya University, Nagoya 464-8602, Japan

DOI 10.1007/s12274-014-0544-6

Nano Research 2014, 7(12): 1843每1848

Address correspondence to Ryo Kitaura, r.kitaura@nagoya-u.jp; Hisanori Shinohara, noris@ nagoya-u.jp

The unique shape of the hollow space of fully flattened carbon nanotubes (FNTs) provides the ability of endohedral doping of C60 molecules into FNTs, in which most of the encapsulated C60 molecules align as single molecular chains along the edges of FNTs and some of the C60 forms two-dimensional close-packed structures inside FNTs.

    

Direct LED writing of submicron resist patterns: Towards the fabrication of individually-addressable InGaN sub- micron stripe-shaped LED arrays

Zheng Gong1,2,3 (*), Benoit Guilhabert1, Zhitao Chen2, and Martin D. Dawson1

1 Institute of Photonics, University of Strathclyde, Wolfson Centre,106 Rottenrow, Glasgow G4 0NW, UK
2 Guangdong General Research Institute for Industrial Technology, 363 Changxin Road, Tianhe District, Guangzhou 510650, China
3 Current address: mLED Ltd., 50 Richmond Street, Glasgow G1 1XP, UK

DOI 10.1007/s12274-014-0545-5

Nano Research 2014, 7(12): 1849每1860

Address correspondence to zheng.gong@mled-ltd.com

Individually addressable submicron-stripe LEDs manufactured by a novel technique based on direct LED writing are reported.

    

Dyeing bacterial cellulose pellicles for energetic heteroatom doped carbon nanofiber aerogels

Zhen-Yu Wu, Hai-Wei Liang, Chao Li, Bi-Cheng Hu, Xing-Xing Xu, Qing Wang, Jia-Fu Chen, and Shu-Hong Yu (*)

Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China These authors contributed equally to this work.

DOI 10.1007/s12274-014-0546-4

Nano Research 2014, 7(12): 1861每1872

Address correspondence to shyu@ustc.edu.cn

Various harmful organic dyes have been adsorbed by bacterial cellulose (BC), and then used as precursors to prepare doped carbon nanofiber (CNF) aerogels (see pictures). Such functional CNF aerogels exhibit great potential in electrochemical energy conversion and storage systems as both electrocatalysts for the oxygen reduction reaction (ORR) and electrode materials for supercapacitors.

    

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