Functionality in single-molecule devices: Model calculations and applications of the inelastic electron tunneling signal in molecular junctions
L. K. Dash, H. Ness, M. J. Verstraete, and R. W. Godby
We analyze how functionality could be obtained within single-molecule devices by using a combination of non-equilibrium Green's functions and ab initio calculations to study the inelastic transport properties of single-molecule junctions. First, we apply a full non-equilibrium Green's function techn ... [J. Chem. Phys. 136, 064708 (2012)] published Mon Feb 13, 2012.
Top-gated germanium nanowire quantum dots in a few-electron regime
Sung-Kwon Shin, Shaoyun Huang, Naoki Fukata, and Koji Ishibashi
Top gated quantum dots (QDs) have been fabricated from n-type chemically synthesized germanium nanowires (GeNWs) by constricting its length with metal electrode contacts. With an intermediate HfO thin film, the constricted GeNW was fully covered by an Omega-shaped top-gate. The QD was probed and cha ... [Appl. Phys. Lett. 100, 073103 (2012)] published Mon Feb 13, 2012.
Drawing graphene nanoribbons on SiC by ion implantation
S. Tongay, M. Lemaitre, J. Fridmann, A. F. Hebard, B. P. Gila et al.
We describe a straightforward technique for selective graphene growth and nanoribbon production onto 4H- and 6H-SiC. The technique presented is as easy as ion implanting regions where graphene layers are desired followed by annealing to 100 degrees C below the graphitization temperature (T) of SiC. ... [Appl. Phys. Lett. 100, 073501 (2012)] published Mon Feb 13, 2012.
CuO/ZnO Nanocomposites Investigated by X-ray Photoelectron and X-ray Excited Auger Electron Spectroscopies
Quentin Simon, Davide Barreca, and Alberto Gasparotto
Supported CuO/ZnO nanocomposites were prepared by a novel bottom-up approach, consisting of: i) deposition of columnar ZnO arrays on Si(100) by Plasma Enhanced-Chemical Vapor Deposition (PE-CVD) using a Zn(II) bis(ketoiminate) precursor; ii) Radio Frequency (RF)-sputtering of Cu in Ar atmospheres. F ... [Surf. Sci. Spectra 17, 93 (2012)] published Mon Feb 13, 2012.
Advanced nanodiamond emitter with pyramidal tip-on-pole structure for emission self-regulation
Anurat Wisitsora-at, Shao-Hua Hsu, Weng P. Kang, Jimmy L. Davidson, and Adisorn Tuantranont
In this paper, we report an innovative nanodiamond field emitter structure consisting of an individual pyramidal tip sitting on top of a ballast resistor pole. The tip-on-pole nanodiamond structures are fabricated by a new mold transfer process that is comprised of reactive-ion-etching of 3.5 [mu]m- ... [J. Vac. Sci. Technol. B 30, 022204 (2012)] published Mon Feb 13, 2012.
Ohmic electromechanical dissipation in nanomechanical cantilevers
T. Barois, A. Ayari, A. Siria, S. Perisanu, P. Vincent et al.
We study the contribution of ohmic dissipation to the mechanical damping of nanoresonators. This damping occurs when DC voltage is applied to a resistive resonator, because the mechanical motion modifies the associated capacitance, thus inducing a dissipative current. Silicon carbide nanowire resona ... [Phys. Rev. B 85, 075407 ] published .
Formation of an extended CoSi thin nanohexagons array coherently buried in silicon single crystal
Guinther Kellermann, Luciano A. Montoro, Lisandro J. Giovanetti, Paula C. dos Santos Claro, Liang Zhang et al.
A Co-doped silica film was deposited on the surface of a Si(100) wafer and isothermally annealed at 750 degrees C to form spherical Co nanoparticles embedded in the silica film and a few atomic layer thick CoSi nanoplatelets within the wafer. The structure, morphology, and spatial orientation of th ... [Appl. Phys. Lett. 100, 063116 (2012)] published Fri Feb 10, 2012.
Electronic rectification devices from carbon nanocones
Chen Ming, Zheng-Zhe Lin, Jun Zhuang, and Xi-Jing Ning
The electronic rectification effects of single wall carbon nanocones (SWCNCs) with cone angles 113 degrees , 60 degrees , and 39 degrees are shown by density functional theory calculation and non-equilibrium Green's functional method, and the 113 degrees cone owns the best rectification. Based on ... [Appl. Phys. Lett. 100, 063119 (2012)] published Fri Feb 10, 2012.
Fabrication of disconnected three-dimensional silver nanostructures in a polymer matrix
Kevin Vora, SeungYeon Kang, Shobha Shukla, and Eric Mazur
We present a simple, one-step technique for direct-writing of a structured nanocomposite material with disconnected silver nanostructures in a polymer matrix. A nonlinear optical interaction between femtosecond laser pulses and a composite material creates silver structures that are embedded inside ... [Appl. Phys. Lett. 100, 063120 (2012)] published Fri Feb 10, 2012.
Well-arranged novel InGaN hexagonal nanoplates at the tops of nitrogen-polarity GaN nanocolumn arrays
Tetsuya Kouno (光野徹也) and Katsumi Kishino (岸野克巳)
Periodically arranged novel InGaN hexagonal nanoplates were fabricated at the tops of square-lattice N-polarity GaN nanocolumn arrays. The key finding in this work is that the growth of InGaN on N-polarity GaN nanocolumns led to a peculiar nanoplate structure. The InGaN nanoplates with thicknesses o ... [AIP Advances 2, 012140 (2012)] published Thu Feb 9, 2012.
Magnetic behaviour of NiZnCoFeO spinel nano-ferrite
Atul Thakur, Preeti Thakur, and Jen-Hwa Hsu
Nanoparticles of the spinel ferrite NiZnCoFeO, have been synthesized by a co-precipitation method. The x-ray diffraction patterns of the particles confirmed the formation of single-phase cubic spinel structure. The Langevin function fitting on M-H data at 300 K gives a log-normal particle size distr ... [J. Appl. Phys. 111, 07A305 (2012)] published Thu Feb 9, 2012.
Resonant magnetic response of TiO microspheres at terahertz frequencies
H. Nemec, C. Kadlec, F. Kadlec, P. Kuzel, R. Yahiaoui et al.
Spray-drying technique is used to fabricate spherical microparticles out of dissolved TiO nanoparticles. We show both experimentally and through numerical calculations that the microspheres support a Mie resonance, leading to an effective magnetic response. For this purpose, nearly single layers of ... [Appl. Phys. Lett. 100, 061117 (2012)] published Thu Feb 9, 2012.
Realizing the Multiparticle Hanbury BrownTwiss Interferometer Using Nitrogen-Vacancy Centers in Diamond Crystals
Li Dai and L. C. Kwek
We demonstrate that the multiparticle Hanbury BrownTwiss interferometer can be realized in a network of nitrogen-vacancy centers: for an N-particle system, the interference effect is manifested only in the Nth-order intensity correlation function. The interference effect can be enhanced through a po ... [Phys. Rev. Lett. 108, 066803 ] published .
Morphology of Lamellae-Forming Block Copolymer Films between Two Orthogonal Chemically Nanopatterned Striped Surfaces
Guoliang Liu, Abelardo Ramirez-Hernandez, Hiroshi Yoshida, Kim Nygard, Dillip K. Satapathy et al.
The structure of block copolymers results from the interplay between weak intermolecular forces, typically in the order of kT per molecule. This is particularly true for block copolymer thin films in the presence of chemically patterned surfaces, where the different contributions to the total free e ... [Phys. Rev. Lett. 108, 065502 ] published .
Effect of indium doping on physical properties of nanocrystallized SnS zinc blend thin films grown by chemical bath deposition
Meriem Reghima, Anis Akkari, Cathy Guasch, and Najoua Kamoun-Turki
SnS:In thin films have been successfully prepared on Pyrex substrates using low cost chemical bath deposition technique with different indium concentrations (y=(([In])/([Sn]))=4%,6%,8%,and10%). The structure, the surface morphology, and the optical properties of the SnS:In films were studied by x-ra ... [J. Renewable Sustainable Energy 4, 011602 (2012)] published Wed Feb 8, 2012.
Enhancement of photoluminescence signal from ultrathin layers with silicon nanocrystals
S. A. Dyakov, D. M. Zhigunov, A. Hartel, M. Zacharias, T. S. Perova et al.
Using the model of oscillating dipoles, we simulated the photoluminescence intensity of a triple-layered structure where the silicon nanocrystals layer was enclosed by buffer and capping silicon dioxide layers. It was found that a structure with an optimized buffer layer thickness exhibited photolum ... [Appl. Phys. Lett. 100, 061908 (2012)] published Wed Feb 8, 2012.
Fabrication of nanoscale glass fibers by electrospinning
M. Praeger, E. Saleh, A. Vaughan, W. J. Stewart, and W. H. Loh
We report the experimental realization of glass nanofibers by electrospinning directly from a melt, demonstrating the viability of electrospinning fibers from non-polymer materials with high melting temperatures and higher surface tensions. The nanofiber material (BO) is molten on the tip of a gold ... [Appl. Phys. Lett. 100, 063114 (2012)] published Wed Feb 8, 2012.
Planar-localized surface plasmon resonance device by block-copolymer and nanoimprint lithography fabrication methods
C. Y. Peter Yang, Elaine L. Yang, Chip A. Steinhaus, Chi-Chun Liu, Paul F. Nealey et al.
The authors report on the integration of delocalized surface plasmon resonances (SPRs) and localized surface plasmon resonances (LSPRs) on a single device. The submicron SPR device was fabricated with nanoimprint lithography (NIL). Gold nanoparticles for LSPR generation were created and deposited vi ... [J. Vac. Sci. Technol. B 30, 026801 (2012)] published Wed Feb 8, 2012.
Porous antimony-doped tin oxide cathodes formed by supercritical CO treatment at low temperature for silver electro-deposition
W. C. Tien, A. K. Chu, H. Y. Wen, M. Y. Chang, and W. Y. Huang
Porous antimony-doped tin oxide (ATO) cathodes for silver electrodeposition devices are proposed. The porous structure of the cathodes is obtained by applying supercritical CO (SCCO) treatment at 60 degrees C on spin-coated ATO nanoparticles. The morphological, structural, and electrical properties ... [J. Vac. Sci. Technol. A 30, 020603 (2012)] published Wed Feb 8, 2012.
Self-organized ZnO nanodot arrays: Effective control using SiN interlayers and low-temperature plasmas
S. Y. Huang, Q. J. Cheng, S. Xu, D. Y. Wei, H. P. Zhou et al.
An advanced inductively coupled plasma (ICP)-assisted rf magnetron sputtering deposition method is developed to synthesize regular arrays of pear-shaped ZnO nanodots on a thin SiN buffer layer pre-deposited onto a silicon substrate. It is shown that the growth of ZnO nanodots obey the cubic root-law ... [J. Appl. Phys. 111, 036101 (2012)] published Tue Feb 7, 2012.
The weak pi pi interaction originated resonant tunneling and fast switching in the carbon based electronic devices
Jun He, Ke-Qiu Chen, and Chang Q. Sun
By means of the nonequilibrium Green's functions and the density functional theory, we have investigated the electronic transport properties of C based electronic device with different intermolecular interactions. It is found that the electronic transport properties vary with the types of the intera ... [AIP Advances 2, 012137 (2012)] published Mon Feb 6, 2012.