List of Issues |  04 , 2014   |  Previous Issue  |  Next Issue

       
Below >>

Flexible thermocells for utilization of body heat

Hyeongwook Im1, Hyung Geun Moon2, Jeong Seok Lee1, In Young Chung2, Tae June Kang3 (*), and Yong Hyup Kim1 (*), )


1 School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
2 Department of Electronics and Communications Engineering, Kwangwook University, Seoul 139-701, Republic of Korea
3 Department of Nanofusion Technology, Pusan National University, Busan 609-735, Republic of Korea

DOI 10.1007/s12274-014-0410-6

Nano Research 2014, 7(4): 443每452

Address correspondence to Tae June Kang, tjkang@pusan.ac.kr; Yong Hyup Kim, yongkim@snu.ac.kr

Flexible thermo-electrochemical cells utilizing hierarchically porous CNT textile have been fabricated for recovery of waste low-grade heat. They are flexible enough to be wearable on the human body and to wrap around cylindrical shapes.

    

Is quantum capacitance in graphene a potential hurdle for device scaling?

Jaeho Lee1,2,∫, Hyun-Jong Chung1,3,∫ (*), David H. Seo1, Jaehong Lee2,4, Hyungcheol Shin2, Sunae Seo1,5, Seongjun Park1, Sungwoo Hwang1, and Kinam Kim1,6

1 Samsung Advanced Institute of Technology, Samsung Electronics, Yongin-Si, Gyeonggi-Do 446-712, Korea
2 Inter-University Semiconductor Research Center (ISRC), School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
3 Division of Quantum Phases and Devices, Department of Physics, Konkuk University, Seoul 143-701, Korea
4 Semiconductor R&D Center, Samsung Electronics, Hwasung-City, Gyeonggi-Do 446-711, Korea
5 Department of Physics, Sejong University, Seoul 143-747, Korea
6 Memory Division, Samsung Electronics, Hwasung-City, Gyeonggi-Do 446-711, Korea
Both authors are contributed equally.

DOI 10.1007/s12274-014-0411-5

Nano Research 2014, 7(4): 453每461

Address correspondence to yongkim@snu.ac.kr

The influence of graphene*s quantum capacitance is investigated for various graphene mobilities. The use of graphene with high mobility and low-voltage operation allows for graphene channels suitable for next generation transistors.

    

SiC nanowires with thickness-controlled SiO2 shells: Fabrication, mechanism, reaction kinetics and photoluminescence properties

Zhenjiang Li1, Jian Zhao1, Meng Zhang1, Jiyin Xia2,

and Alan Meng2 (*)


1 College of Electromechanical Engineering, Key Laboratory of Polymer Material Advanced Manufacturing Technology of Shandong Province, Qingdao University of Science and Technology, Qingdao 266061, Shandong, China
2 State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China

DOI 10.1007/s12274-014-0413-3

Nano Research 2014, 7(4): 462每472

Address correspondence to mengalan@126.com

SiC nanowires with thickness-controlled SiO2 shells as well as pure SiC nanowires have been obtained by alkaline cleaning treatment in NaOH solution. Photoluminescence (PL) spectroscopy shows that the SiC nanowires sheathed with an optimum SiO2 thickness (spectrum 4) have better photoluminescence properties than either the bare SiC nanowires or SiC nanowires with thicker coatings of SiO2.

    

GaAs/AlGaAs heterostructure nanowires studied by cathodoluminescence

Jessica Bolinsson1,†, Martin Ek2, Johanna Trägårdh1,‡, Kilian Mergenthaler1, Daniel Jacobsson1,Mats-Erik Pistol1, Lars Samuelson1, and Anders Gustafsson1 (*)


1 Solid State Physics and the Nanometer Structure Consortium, Lund University, Box 118, SE-221 00 Lund, Sweden
2 Polymer and Materials Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden
Present address: Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
Present address: Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street Glasgow G4 0RE, UK

DOI 10.1007/s12274-014-0414-2

Nano Research 2014, 7(4): 473每490

Address correspondence to anders.gustafsson@ftf.lth.se

Cathodoluminescence investigations show that the optical quality of GaAs-based nanowires increases with growth temperature. There is a link between emission at 1.48 eV and twin planes, preventing near-bandgap emission from the nanowires.

    

TiO2 nanotube branched tree on a carbon nanofiber nanostructure as an anode for high energy and power lithium ion batteries

Taeseup Song1, Hyungkyu Han1, Heechae Choi2, Jung Woo Lee1, Hyunjung Park1, Sangkyu Lee1, Won Il Park1,Seungchul Kim2, Li Liu3, and Ungyu Paik1 (*)


1 Department of Materials Science Engineering, Hanyang University, Seoul 133-791, Korea
2 Center for Computational Science, Korea Institute of Science and Technology, Seoul 136-791, Korea
3 School of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, China

DOI 10.1007/s12274-014-0415-1

Nano Research 2014, 7(4): 491每501

Address correspondence to upaik@hanyang.ac.kr

High-density TiO2 nanotubes branched on carbon nanofiber is used as an anode material for lithium ion batteries. TiO2 nanotubes branched on carbon nanofiber electrode shows the significant increase in areal capacity as well as excellent rate capability due to the low electric resistance between the current collector and branched TiO2 nanotube and high TiO2 nanotubes loading.

    

Preparation of carbon-coated iron oxide nanoparticles dispersed on graphene sheets and applications as advanced anode materials for lithium-ion batteries

Huilong Fei1,∫, Zhiwei Peng1,∫, Lei Li1, Yang Yang1,2, Wei Lu1, Errol L. G. Samuel1, Xiujun Fan1,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
These authors contribute equally to this work.

DOI 10.1007/s12274-014-0416-0

Nano Research 2014, 7(4): 502每510

Address correspondence to tour@rice.edu

Fe2O3 nanoparticles encapsulated in graphitic shells are uniformly distributed on graphene sheets. The resulting composites show superior Li+ storage properties as anode material for Li-ion batteries.

    

Chemical vapor deposition growth of monolayer MoSe2 nanosheets

Jonathan C. Shaw1, Hailong Zhou1, Yu Chen2, Nathan O. Weiss2, Yuan Liu2, Yu Huang2,3, and Xiangfeng Duan1,3(*)


1 Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
2 Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA
3 California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA

DOI 10.1007/s12274-014-0417-z

Nano Research 2014, 7(4): 511每517

Address correspondence to xduan@chem.ucla.edu

Using chemical vapor deposition, we have synthesized monolayer MoSe2 nanosheets directly on 300 nm SiO2/Si substrates. The MoSe2 nanosheets have size-dependent properties, including a transition from an indirect-to-direct band gap as the out-of plane dimensions are reduced to a single layer.

    

Strain-tunable electronic and transport properties of MoS2 nanotubes

Weifeng Li1, Gang Zhang1 (*), Meng Guo2, and Yong-Wei Zhang1


1 Institute of High Performance Computing, A*STAR, Singapore 138632, Singapore
2 National Supercomputer Center in Jinan, Shandong Computer Science Center, China

DOI 10.1007/s12274-014-0418-y

Nano Research 2014, 7(4): 518每527

Address correspondence to zhangg@ihpc.a-star.edu.sg

Using density functional theory calculations, we have investigated the mechanical properties and strain effects on the electronic structure and transport properties of molybdenum disulfide (MoS2) nanotubes.

    

Three-dimensional structured on-chip stacked zone plates for nanoscale X-ray imaging with high efficiency

Stephan Werner (*), Stefan Rehbein, Peter Guttmann, and Gerd Schneider


Helmholtz-Zentrum Berlin f邦r Materialien und Energie GmbH, Institute for Soft Matter and Functional Materials, Albert-Einstein-Straße 15, 12489 Berlin, Germany

DOI 10.1007/s12274-014-0419-x

Nano Research 2014, 7(4): 528每535

Address correspondence to stephan.werner@helmholtz-berlin.de

The paper shows the first practical realization of high resolution on-chip stacked zone plates and describes their diffraction behaviour. The three-dimensional (3-D) structured X-ray optics have the poten-tial to combine high spatial resolving power with high diffraction efficiencies in the soft and hard X-ray photon energy regime.

    

Synthesis of hexagonal and triangular Fe3O4 nanosheets via seed-mediated solvothermal growth

Chunhui Li (*), Ruixue Wei, Yanmin Xu, Ailing Sun, and
Liuhe Wei (*)

 

College of Chemistry and Molecular Engineering, Zhengzhou Key Laboratory of Elastic Sealing Materials, Zhengzhou University,
Zhengzhou 450001, China

DOI 10.1007/s12274-014-0421-3

Nano Research 2014, 7(4): 536每543

Address correspondence to Chunhui Li, lch@zzu.edu.cn; Liuhe Wei, weiliuhe@zzu.edu.cn

Anisotropic Fe3O4 nanosheets enclosed by {111} facets have been prepared via a two-step microemulsion solvothermal method. The presence and number of twin faces are of crucial important in the formation of hexagonal and triangular nanosheets. The material showed excellent catalytic activity in the synthesis of quinoxaline in many solvents.

    

Study of photocurrent generation in InP nanowire-based p+每i每n+ photodetectors

Vishal Jain1,2, Ali Nowzari1, Jesper Wallentin1, Magnus T. Borgström1, Maria E. Messing1, Damir Asoli3, Mariusz Graczyk1, Bernd Witzigmann4, Federico Capasso5, Lars Samuelson1, and Håkan Pettersson1,2 (*)

1 Solid State Physics and the Nanometer Structure Consortium, Lund University, Box 118, SE-22100 Lund, Sweden
2Laboratory of Mathematics, Physics and Electrical Engineering, Halmstad University, Box 823, SE-301-18 Halmstad, Sweden
3 Sol Voltaics AB, Ideon Science Park, Scheelevägen 17, SE-22370 Lund, Sweden
4 Department of Computational Electronics and Photonics, University of Kassel, Wilhelmshoeher Allee 71, D-34121 Kassel, Germany
5 School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA

DOI 10.1007/s12274-014-0422-2

Nano Research 2014, 7(4): 544每552

Address correspondence to hakan.pettersson@hh.se

The dependence of photocurrent on p+-segment length in p+每i每n+ InP nanowire (NW)-based photodetectors has been studied. Including an extended p+-segment shifts the photocurrent generation from the substrate to the NWs, as manifested by a blue-shift in onset energy and strongly enhanced photocurrent.

    

Heating graphene to incandescence and the measure-ment of its work function by the thermionic emission method

Feng Zhu1,2,∫, Xiaoyang Lin1,2,∫, Peng Liu1,2 (*), Kaili Jiang1,2 (*), Yang Wei1,2, Yang Wu1,2, Jiaping Wang1,2, and Shoushan Fan1,2


1 State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua每Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China
2 Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
The first two authors contributed equally to this work.

DOI 10.1007/s12274-014-0423-1

Nano Research 2014, 7(4): 553每560

Address correspondence to Peng Liu, pengliu@mail.tsinghua.edu.cn; Kaili Jiang, Jiangkl@mail.tsinghua.edu.cn

A CNT-graphene hybrid film (CGF) made by transferring CVD- grown graphene to a cross-stacked CNT film can be joule heated to incandescence in vacuum. The intrinsic work function of graphene is then derived through the thermionic emission of the CGF to be 4.74 eV.

    

The effect of the substrate on the Raman and photoluminescence emission of single-layer MoS2

Michele Buscema (*), Gary A. Steele (*), Herre S. J. van der Zant, and Andres Castellanos-Gomez (*)

 

Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands

DOI 10.1007/s12274-014-0424-0

Nano Research 2014, 7(4): 561每571

Address correspondence to Michele Buscema, m.buscema@tudelft.nl; Gary A. Steele, g.a.steele@tudelft.nl; Andres Castellanos-Gomez, a.castellanosgomez@tudelft.nl

We study the Raman and photoluminescence (PL) emission from single-layer molybdenum disulfide (MoS2) on dielectric and conducting substrates. We find that the substrate can strongly affect the Raman and PL emission. We attribute this effect to changes in the substrate-induced doping level and in the decay rates of the excitonic transitions. Our results provide a method to quantitatively study the Raman and PL emission from MoS2-based vertical heterostructures and represent the first step in ad hoc tuning the PL emission of 1L MoS2 by selecting the proper substrate.

    

Folded MoS2 layers with reduced interlayer coupling

Andres Castellanos-Gomez (*), Herre S. J. van der Zant, and Gary A. Steele


Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ Delft, The Netherlands

OI 10.1007/s12274-014-0425-z

Nano Research 2014, 7(4): 572每578

Address correspondence to a.castellanos-gomez@tudelft.nl

The interlayer coupling between MoS2 planes can be reduced by folding the layers, altering the natural crystalline stacking order. Due to this reduction of the interlayer coupling, folded MoS2 presents some of the optoelectronic properties of single-layer MoS2 such as enhanced photoluminescence and contribution of charged excitons to the photoluminescence yield.

    

Large thermal biasing of individual gated nanostructures

Stefano Roddaro1,2 (*), Daniele Ercolani1, Mian Akif Safeen1, Francesco Rossella1, Vincenzo Piazza3,Francesco Giazotto1, Lucia Sorba1, and Fabio Beltram1


1 NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
2 Istituto Officina dei Materiali 每 CNR, Basovizza S.S. 14 km 163.5, I-34149 Trieste, Italy
3 Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, Italy

DOI 10.1007/s12274-014-0426-y

Nano Research 2014, 7(3): 579每587

Address correspondence to s.roddaro@sns.it

We demonstrate very large and uniform temperature gradients up to about 1 K every 100 nm, in an architecture which is compatible with the field-effect control of the nanostructure under test. The temperature gradients demonstrated greatly exceed those typically obtainable with standard resistive heaters fabricated on top of the oxide layer. The nanoheating platform is demonstrated in the specific case of a short-nanowire device.

    

Copyright Nano Research   |   Contact Us