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Robust reduction of graphene fluoride using an electrostatically biased scanning probe

Woo-Kyung Lee1, Stanislav Tsoi1, Keith E. Whitener1, Rory Stine2, Jeremy T. Robinson3, Jonathon S. Tobin4, Asanka Weerasinghe4, Paul E. Sheehan1 (), and Sergei F. Lyuksyutov4 ()

 

1 Division of Chemistry, US Naval Research Laboratory, Washington DC 20375, USA
2 Nova Research, Alexandria, Virginia 22308, USA
3 Division of Electronic Science and Technology, US Naval Research Laboratory, Washington DC 20375, USA
4 The University of Akron, Department of Physics, Akron OH 44325, USA

DOI 10.1007/s12274-013-0355-1

Nano Research 2013, 6(11): 767每774

Address correspondence to Paul E. Sheehan, paul.sheehan@nrl.navy.mil; Sergei F. Lyuksyutov, sfl@uakron.edu

Isolated graphene nanoribbons with resistivity less that may be achieved with e-beam lithography can be easily produced in ambient air using atomic force microscopy-based electrostatic nanolithography (AFMEN). Reduction of fluorine from graphene fluoride occurs in non-uniform electric filed of magnitude 1每2 V/nm.

    

High-detectivity InAs nanowire photodetectors with spectral response from ultraviolet to near-infrared

Zhe Liu1,2, Tao Luo2, Bo Liang1,2, Gui Chen2, Gang Yu2, Xuming Xie2, Di Chen2 (), and Guozhen Shen1 ()


1 State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductor, Chinese Academy of Sciences, Beijing 100083, China
2 Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, China

DOI 10.1007/s12274-013-0356-0

Nano Research 2013, 6(11): 775每783

Address correspondence to Guozhen Shen, gzshen@semi.ac.cn; Di Chen, dichen@mail.hust.edu.cn

Single InAs nanowire-based photodetectors have been fabricated and shown to have very high responsivity and stability over a broad spectral range from the ultraviolet to the near-infrared.

    

Bilayer self-assembly on a hydrophilic, deterministically nanopatterned surface

Gregory S. Smith1 (), Seung-Yong Jung2,†, James F. Browning3, Jong K. Keum3, Nickolay V. Lavrik2, Mussie G. Alemseghed1,4, and C. Patrick Collier2


1 Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
2 Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
3 Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
4 Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0012, USA
Present address: Chemical Abstracts Service, Columbus, OH 43202, USA

DOI 10.1007/s12274-013-0357-z

Nano Research 2013, 6(11): 784每794

Address correspondence to smithgs1@ornl.gov

Combining neutron reflectometry and nanolithography, the detailed structure of a self-assembled organic thin film deposited on a regularly patterned silicon surface at the solid每liquid interface is presented. The detailed structure of the substrate and film, inside and outside of the 100 nm deep holes is revealed with sub-nanometer resolution.

    

A novel strategy for improving upconversion luminescence of NaYF4:Yb, Er nanocrystals by coupling with hybrids of silver plasmon nanostructures and poly(methyl methacrylate) photonic crystals

Wen Xu1, Yongsheng Zhu2, Xu Chen1, Jing Wang1, Li Tao1, Sai Xu1, Tong Liu1, and Hongwei Song1 ()


1 State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
2 College of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China

DOI 10.1007/s12274-013-0358-y

Nano Research 2013, 6(11): 795每807

Address correspondence to songhw@jlu.edu.cn

A novel strategy to improve the upconversion luminescence (UCL) of NaYF4:Yb3+,Er3+ upconversion nanophosphors (UCNPs) is presented, combining the near-field coupling of the surface plasmon resonance (SPR) of a porous silver film and the far-field coupling of poly(methyl methacrylate) photonic crystals with the UCNPs. A maximum UCL enhancement of 60-fold was obtained and furthermore the porous structure of the silver film can suppress local thermal effects and increase transparency.

    

Composition-dependent ultra-high photoconductivity in ternary CdSxSe1-x nanobelts as measured by optical pump-terahertz probe spectroscopy

Hongwei Liu1,2, Junpeng Lu1 (), Minrui Zheng1, Sing Hai Tang1, Xinhai Zhang2 (), and Chorng Haur Sow1 ()


1 Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
2 Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, 117602, Singapore

DOI 10.1007/s12274-013-0359-x

Nano Research 2013, 6(11): 808每821

Address correspondence to Junpeng Lu, phyljp@nus.edu.sg; Xinhai Zhang, xh-zhang@imre.a-star.edu.sg; Chorng Haur Sow, physowch@nus.edu.sg

Composition-dependent photoconductivity in ternary CdSxSe1-x nanobelts is measured using optical pump-terahertz probe spectroscopy. Binary CdS and CdSe are observed to have much shorter carrier lifetimes than those of ternary alloys whilst ternary CdSxSe1-x nanobelts present much higher photoconductivity than those of binary nanobelts.

    

Gold nanorods core/AgPt alloy nanodots shell: A novel potent antibacterial nanostructure

Xiaona Hu1,3,†, Yuyun Zhao2,†, Zhijian Hu1, Aditya Saran1,3, Shuai Hou1,3, Tao Wen1,3, Wenqi Liu1,3, Yinglu Ji1, Xingyu Jiang2 (), and Xiaochun Wu1 ()


1 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, China
2 CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, Beijing 100190, China
3 University of Chinese Academy of Sciences, Beijing 100049, China
These two authors contributed equally to the work.

DOI 10.1007/s12274-013-0360-4

Nano Research 2013, 6(11): 822每835

Address correspondence to Xiaochun Wu, wuxc@nanoctr.cn; Xingyu Jiang, xingyujiang@nanoctr.cn

In the light of the current problems of silver nanoparticles (Ag NPs) in terms of antibacterial performance, we designed a trimetallic core/shell nanostructure with AgPt alloy nanodots epitaxially grown on gold nanorods (Au@PtAg NRs) as a potential antibacterial agent. Such architecture is not only found to be an effective way to incorporate the requirements of both high antibacterial activity and high chemical stability at the same time, but also promises great potential in utilizing additional plasmonic effects in the fight against pathogenic bacteria, including the challenge of increasing severity of multidrug resistance.

    

Coulometric sizing of nanoparticles: Cathodic and anodic impact experiments open two independent routes to electrochemical sizing of Fe3O4 nanoparticles

Kristina Tschulik1 (), Baptiste Haddou1, Dario Omanović2, Neil V. Rees1, and Richard G. Compton1 ()


1 Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom
2 Center for Marine and Environmental Research, Ruđer Bošković Institute, P. O. Box 180, 10001 Zagreb, Croatia

DOI 10.1007/s12274-013-0361-3

Nano Research 2013, 6(11): 836每841

Address correspondence to Richard G. Compton, richard.compton@chem.ox.ac.uk; Kristina Tschulik, tschulik.kristina@gmail.com

It is demonstrated that sizing of single Fe3O4 nanoparticles can be performed by two independent electrochemical routes〞cathodic and anodic particle coulometry. This allows precise nanoparticle size information and verification of the obtained results solely by electrochemical methods.

    

Reduced graphene oxide with a highly restored 羽-conjugated structure for inkjet printing and its use in all-carbon transistors

Yang Su, Jinhong Du, Dongming Sun, Chang Liu, and Huiming Cheng ()


Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
These authors contributed equally to this work.

DOI 10.1007/s12274-013-0362-2

Nano Research 2013, 6(11): 842每852

Address correspondence to cheng@imr.ac.cn

In an attempt to achieve graphene sheets with a highly restored 羽-conjugated structure for use in inkjet-printed electronics, we present a ※weak oxidation每vigorous exfoliation§ strategy for tailormade graphene oxide with a more intact carbon plane and suitable size. Its inkjet-printed patterns show an ultrahigh conductivity of ~420 S﹞cm每1, which is tens of times higher than previously reported results. Furthermore, printed all-carbon transistors with excellent performance are demonstrated.

    

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