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Te-seeded growth of few-quintuple layer Bi2Te3 nanoplates

Yanyuan Zhao1, Maria de la Mata2, Richard L. J. Qiu3, Jun Zhang1, Xinglin Wen1, Cesar Magen4, Xuan P. A. Gao3, Jordi Arbiol2,5 (*), and Qihua Xiong1,6 (*)

1 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
2 Institut de Ci豕ncia de Materials de Barcelona, ICMAB-CSIC, E-08193 Bellaterra, CAT, Spain
3 Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA
4 Laboratorio de Microscop赤as Avanzadas (LMA), Instituto de Nanociencia de Aragon (INA) -ARAID and Departamento de Fisica de la Materia Condensada, Universidad de Zaragoza, 50018 Zaragoza, Spain
5 Instituci車 Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, CAT, Spain
6 NOVITAS, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798

DOI 10.1007/s12274-014-0487-y

Nano Research 2014, 7(9): 1243每1253

Address correspondence to Jordi Arbiol, arbiol@icrea.cat; Qihua Xiong, qihua@ntu.edu.sg

Ultrathin (down to three quintuple layers (QL)) Bi2Te3 nanoplates have been synthesized through a vapor transport method, in which a Te-seeded epitaxial growth mechanism has been demonstrated. High optical contrast of few-QL Bi2Te3 on SiO2/Si substrates has been demonstrated experimentally and computationally.

    

Pd embedded in porous carbon (Pd@CMK-3) as an active catalyst for Suzuki reactions: Accelerating mass transfer to enhance the reaction rate

Zhencai Wang1, Wei Chen1 (*), Zhenliang Han1, Jie Zhu1, Na Lu1, Yun Yang1, Dekun Ma1, Ying Chen2, and Shaoming Huang1 (*)

1 Zhejiang Key Laboratory of Carbon Materials, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325027, China
2 ARC Centre of Excellence for Functional Nanomaterials, Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia

DOI 10.1007/s12274-014-0488-x

Nano Research 2014, 7(9): 1254每1262

Address correspondence to Wei Chen, wchen@wzu.edu.cn; Shaoming Huang, smhuang@wzu.edu.cn

A heterogeneous catalyst of Pd embedded in porous carbon (CMK-3) has been synthesized by a three-step method, and shows excellent performance in catalyzing Suzuki reactions. Importantly, ultrasonica- tion can effectively wet the pore channels and improve the mass transfer within them, and thus lead to quadrupled catalytic activity.

    

Oxide-on-graphene field effect bio-ready sensors

Bei Wang1,∫, Kristi L. Liddell2,∫, Junjie Wang1, Brandon Koger1, Christine D. Keating2, and Jun Zhu1,3 (*)

1 Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
2 Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
3 Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
These authors contributed equally to this work.

DOI 10.1007/s12274-014-0489-9

Nano Research 2014, 7(9): 1263每1270

Address correspondence to jzhu@phys.psu.edu

This work reports the fabrication, functionalization and operation of a novel oxide-on-graphene field effect bio-ready sensor and its pH sensing is demonstrated.

    

Direct measurement of the Raman enhancement factor of rhodamine 6G on graphene under resonant excitation

Shibin Deng1, Weigao Xu1, Jinying Wang1, Xi Ling2, Juanxia Wu1, Liming Xie3,Jing Kong2, Mildred S. Dresselhaus2,4, and Jin Zhang1 (*)

1 Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2 Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
3 Key Laboratory of Standardization and Measurement for Nanotechnology of Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, China
4 Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

DOI 10.1007/s12274-014-0490-3

Nano Research 2014, 7(9): 1271每1279

Address correspondence to jinzhang@pku.edu.cn

A polarization-difference technique is used to suppress the fluorescence background by subtracting two spectra collected using different excitation laser polarizations. As a result, enhancement factors are obtained ranging between 1.7 and 5.6 for the four Raman modes of rhodamine 6G at 611, 1,183, 1,361, and 1,647 cm每1 under resonant excitation by a 514.5 nm laser. By comparing these results with the results obtained under non-resonant excitation (632.8 nm) and pre-resonant excitation (593 nm), the enhancement can be attributed to static chemical enhancement (CHEM) and tuning of the molecular resonance.

    

Nitrogen-doped graphene supported Pd@PdO core每 shell clusters for C每C coupling reactions

Baojiang Jiang1, Sanzhao Song1, Jianqiang Wang2, Ying Xie1, Wenyi Chu1, Hongfeng Li1, Hui Xu1, Chungui Tian1, and Honggang Fu1 (*)

1 Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People*s Republic of China, Heilongjiang University, Harbin 150080, China
2 Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China

DOI 10.1007/s12274-014-0492-1

Nano Research 2014, 7(9): 1280每1290

Address correspondence to fuhg@vip.sina.com

Pd@PdO core每shell clusters are well-dispersed on N-doped graphene (NDG) due to the influence of nitrogen on the nucleation and growth kinetics of the metal nanoparticles. The Pd@PdO每NDG catalysts exhibit high performance and good structural stability for C每C cross coupling reactions.

    

Gold nanorod每photosensitizer conjugate with extracellular pH-driven tumor targeting ability for photothermal/photodynamic therapy

Nannan Wang1,∫, Zilong Zhao1,∫, Yifan Lv1, Huanhuan Fan1, Huarong Bai1, Hongmin Meng1, Yuqian Long1, Ting Fu1, Xiaobing Zhang1, and Weihong Tan1,2 (*)

1 Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, and Collaborative Research Center of Molecular Engineering for Theranostics, Hunan University, Changsha 410082, China
2 Department of Chemistry and Department of Physiology and Functional Genomics, Center for Research at Bio/nano Interface, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, Florida 32611-7200, USA
These authors contributed equally to this work.

DOI 10.1007/s12274-014-0493-0

Nano Research 2014, 7(9): 1291每1301

Address correspondence to tan@chem.ufl.edu

The acidic microenvironment in tumors drives chlorin e6每pHLIPss每 AuNR conjugates to tumor cells for bimodal photodynamic and photothermal therapy.

    

On-chip detection of a single nucleotide polymorphism without polymerase amplification

Jinhee Han1, Matthew Tan2, Lakshmana Sudheendra1, Robert H. Weiss2,3, and Ian M. Kennedy1 (*)

1 Department of Mechanical and Aerospace Engineering, University of California, Davis, California 95616, USA
2 Division of Nephrology, Department of Internal Medicine, University of California, Davis, California 95616, USA
3 Medical Service, Sacramento VA Medical Center, Sacramento, California, 95655, USA

DOI 10.1007/s12274-014-0494-z

Nano Research 2014, 7(9): 1302每1310

Address correspondence to imkennedy@ucdavis.edu

A nanoparticle-assembled photonic crystal (PC) is used to detect single nucleotide polymorphism (SNP). The PC-based assay exhibited the ability to detect the mutation in a very small number of gene copies, similar to the number detected using conventional real-time polymerase chain reaction (PCR).

    

Shape-controlled growth of SrTiO3 polyhedral submicro/ nanocrystals

Lingqing Dong1,2,∫, Hui Shi3,∫, Kui Cheng1,∫, Qi Wang3, Wenjian Weng1,4 (*), and Weiqiang Han1,2,5 (*)

1 Department of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China 
2 Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315210, China
3 Soft Matter Research Center and Department of Chemistry, Zhejiang University, Hangzhou 310027, China
4 Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
5 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
These authors contributed equally to this work.

DOI 10.1007/s12274-014-0495-y

Nano Research 2014, 7(9): 1311每1318

Address correspondence to Wenjian Weng, wengwj@zju.edu.cn; Weiqiang Han, hanweiqiang@nimte.ac.cn

The concentration and pKa value of the alcohol molecules employed as surfactants in the synthesis mixture both play important roles in determining the size and shape of SrTiO3 polyhedral submicro/ nanocrystals. The adsorption energy of alcohol molecules on SrTiO3 {110} facets depends on their pKa values, which are therefore critical for morphology control.

    

SnO2每reduced graphene oxide nanoribbons as anodes for lithium ion batteries with enhanced cycling stability

Lei Li1,∫, Anton Kovalchuk1,∫, and James M. Tour1,2,3 (*)

1 Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA
2 Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 Main Street, Houston, Texas 77005, USA
3 Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, USA ∫ The authors contributed equally to this work.

DOI 10.1007/s12274-014-0496-x

Nano Research 2014, 7(9): 1319每1326

Address correspondence to tour@rice.edu

A facile and cost-effective approach for the fabrication of the nano- composite material SnO2每reduced graphene oxide nanoribbons has been developed. The resulting composite demonstrates a high capacity, good rate performance, and an excellent cycling stability due to the synergistic combination of electrically conductive reduced graphene oxide nanoribbons and SnO2.

    

Aptamer-conjugated upconversion nanoprobes assisted by magnetic separation for effective isolation and sensitive detection of circulating tumor cells

Shuai Fang, Chao Wang, Jian Xiang, Liang Cheng, Xuejiao Song, Ligeng Xu, Rui Peng (*), and Zhuang Liu (*)

Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China These two authors contributed equally to this work.

DOI 10.1007/s12274-014-0497-9

Nano Research 2014, 7(9): 1327每1336

Address correspondence to Zhuang Liu, zliu@suda.edu.cn; Rui Peng, rpeng@suda.edu.cn

Aptamer-conjugated upconversion nanoparticles (UCNPs) have been used for the first time as nanoprobes to recognize tumor cells, and were then enriched by attaching magnetic nanoparticles (MNPs) and placing in the presence of a magnetic field. Owing to the autofluorescence-free nature of upconversion luminescence imaging, as well as the magnetic separation to further reduce background signals, our technique allows for highly sensitive detection and collection of small numbers of tumor cells spiked into healthy blood samples, and shows promise for the detection of circulating tumor cells (CTC) in medical diagnostics.

    

Bimetallic Pd每Ni core每shell nanoparticles as effective catalysts for the Suzuki reaction

Ji Xiang, Peng Li (*), Hanbao Chong, Li Feng, Fangyu Fu, Zhuang Wang, Shilin Zhang, and Manzhou Zhu

School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China

DOI 10.1007/s12274-014-0498-8

Nano Research 2014, 7(9): 1337每1343

Address correspondence to peng-li@ahu.edu.cn

A simple and efficient method for the synthesis of Pd每Ni bimetallic nanoparticles (NPs) has been developed. The as-prepared Pd每Ni bimetallic NPs have a core每shell structure, which affords excellent catalytic activities in the Suzuki reaction.

    

Plasmonic mode mixing in nanoparticle dimers with nm-separations via substrate-mediated coupling

Jesse Theiss, Mehmet Aykol, Prathamesh Pavaskar, and Stephen B. Cronin (*)

Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA

DOI 10.1007/s12274-014-0499-7

Nano Research 2014, 7(9): 1344每1354

Address correspondence to scronin@usc.edu

Metallic nanoparticle dimers with nanometer separations are characterized by dark-field scattering micro-spectroscopy and transmission electron microscopy. Experiment and numerical simulations show that the dimers exhibit a polarization-dependent Fano interference resulting from substrate-mediated coupling of the hybridized plasmon modes in the asymmetric nanoparticle pairs.

    

Polyaniline-modified cetyltrimethylammonium bromide每 graphene oxide每sulfur nanocomposites with enhanced performance for lithium每sulfur batteries

Yongcai Qiu, Wanfei Li, Guizhu Li, Yuan Hou, Lisha Zhou, Hongfei Li, Meinan Liu, Fangmin Ye, Xiaowei Yang, and Yuegang Zhang (*)

i-LAB, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
These authors contributed equally to this work.

DOI 10.1007/s12274-014-0500-5

Nano Research 2014, 7(9): 1355每1363

Address correspondence to ygzhang2012@sinano.ac.cn

Conductive polymer coatings can boost the power storage capacity of lithium每sulfur batteries. We report here on the design and preparation〞by combining a facile and green chemical deposition method with an oxidative polymerization approach〞of polyaniline- modified cetyltrimethylammonium bromide每graphene oxide每sulfur nanocomposites with significantly enhanced lithium每sulfur battery performance.

    

Hydroformylation of alkenes over rhodium supported on the metal每organic framework ZIF-8

Chao Hou, Guofeng Zhao, Yongjun Ji, Zhiqiang Niu, Dingsheng Wang, and Yadong Li (*)

Department of Chemistry, Tsinghua University, Beijing 100084, China

DOI 10.1007/s12274-014-0501-4

Nano Research 2014, 7(9): 1364每1369

Address correspondence to ydli@mail.tsinghua.edu.cn

Highly dispersed rhodium nanoparticles with small particle sizes have been successfully immobilized by the framework of the metal每organic framework ZIF-8, and exhibit high catalytic activity for hydroformylation of n-alkenes.

    

Highly flexible and transparent conducting silver nanowire/ZnO composite film for organic solar cells

Myungkwan Song1,∫, Jong Hyun Park2,∫, Chang Su Kim1, Dong-Ho Kim1, Yong-Cheol Kang3, Sung-Ho Jin4, Won-Yong Jin5, and Jae-Wook Kang5 (*)

1 Surface Technology Division, Korea Institute of Materials Science, Changwon 641-831, Republic of Korea
2 OLED Development Group, LG Display Co., Ltd. Gyeonggi-do 413-811, Republic of Korea
3 Department of Chemistry, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan 608-737, Republic of Korea
4 Department of Chemistry Education, Graduate Department of Chemical Materials and Institute for Plastic Information and Energy Materials, Pusan National University, Busan 609-735, Republic of Korea
5 The Graduate School of Flexible and Printable Electronics, Polymer Materials Fusion Research Center, Chonbuk National University, Jeonju 561-756, Republic of Korea
These authors contributed equally to this work.

DOI 10.1007/s12274-014-0502-3

Nano Research 2014, 7(9): 1370每1379

Address correspondence to jwkang@jbnu.ac.kr

Silver nanowire/ZnO composite transparent electrodes have been used to fabricate silver nanowire-based flexible organic solar cells.

    

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