AIP Nanoscale science and design - News Items
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Miniband formation in InGaAs quantum dot superlattice
Friday, July 30, 2010 - 04:19 AM - 20 hours, 26 minutes ago - Nanotech - AIP Nanoscale science and design
Takeyoshi Sugaya, Takeru Amano, Masahiko Mori, and Shigeru Niki We report the formation of a miniband in a quantum dot (QD) superlattice with 20-stack InGaAs QD layers, which we confirmed by the ... (Read More)
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The temperature dependence of the impedance of alkanethiol self-assembled monolayers
Friday, July 30, 2010 - 04:19 AM - 20 hours, 26 minutes ago - Nanotech - AIP Nanoscale science and design
Brigid O'Brien, Harmonie Sahalov, and Peter C. Searson The impedance of alkanethiol self-assembled monolayers at the solid/liquid interface exhibits unusual behavior. The capacitance C is ... (Read More)
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Optimizing transistor performance of percolating carbon nanotube networks
Friday, July 30, 2010 - 04:19 AM - 20 hours, 26 minutes ago - Nanotech - AIP Nanoscale science and design
V. K. Sangwan, A. Behnam, V. W. Ballarotto, M. S. Fuhrer, Ant Ural et al. In percolating networks of mixed metallic and semiconducting carbon nanotubes (CNTs), there is a tradeoff between high ... (Read More)
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Soft-solution route to ZnO nanowall array with low threshold power density
Friday, July 30, 2010 - 04:19 AM - 20 hours, 26 minutes ago - Nanotech - AIP Nanoscale science and design
Eue-Soon Jang, Xiaoyuan Chen, Jung-Hee Won, Jae-Hun Chung, Du-Jeon Jang et al. ZnO nanowall array (ZNWA) has been directionally grown on the buffer layer of ZnO nanoparticles dip-coated on ... (Read More)
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Engineering the band gap of SiC nanotubes with a transverse electric field
Thursday, July 29, 2010 - 04:20 AM - 1 day, 20 hours ago - Nanotech - AIP Nanoscale science and design
G. Alfieri and T. Kimoto The effects of a transverse electric field, of intensities ranging from 0 to 0.20 V/A, on the band gap width of SiC nanotubes (SiCNTs) are investigated by means of ... (Read More)
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Characteristics of high-k AlO dielectric using ozone-based atomic layer deposition for dual-gated graphene devices
Thursday, July 29, 2010 - 04:20 AM - 1 day, 20 hours ago - Nanotech - AIP Nanoscale science and design
B. Lee, G. Mordi, M. J. Kim, Y. J. Chabal, E. M. Vogel et al. We present characteristics of dual-gated graphene devices with an AlO gate dielectric formed by an O-based atomic-layer-deposition ... (Read More)
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High efficiency mesoporous titanium oxide PbS quantum dot solar cells at low temperature
Thursday, July 29, 2010 - 04:20 AM - 1 day, 20 hours ago - Nanotech - AIP Nanoscale science and design
Tong Ju, Rebekah L. Graham, Guangmei Zhai, Yvonne W. Rodriguez, Alison J. Breeze et al. Efficient charge transport is demonstrated in TiO/PbS quantum dot solar cells where the PbS absorber (~1.1 ... (Read More)
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Coupling of single InGaAs quantum dots to the plasmon resonance of a metal nanocrystal
Wednesday, July 28, 2010 - 04:20 AM - 2 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
A. Urbanczyk, G. J. Hamhuis, and R. Notzel The authors report the coupling of single InGaAs quantum dots (QDs) to the surface plasmon resonance of a metal nanocrystal. Clear enhancement of the ... (Read More)
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Gapless insulator and a band gap scaling law in semihydrogenated graphene
Tuesday, July 27, 2010 - 04:19 AM - 3 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
A. R. Wright, T. E. O'Brien, D. Beaven, and C. Zhang We demonstrate two unusual electronic properties of semihydrogenated graphene with variable sized A- or B-hydrogenated domains within the ... (Read More)
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Sum-frequency generation in doubly resonant GaP photonic crystal nanocavities
Tuesday, July 27, 2010 - 04:19 AM - 3 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
Kelley Rivoire, Ziliang Lin, Fariba Hatami, and Jelena VuCkovic We demonstrate and characterize continuous wave chi sum-frequency generation in gallium phosphide photonic crystal nanocavities. We ... (Read More)
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The effect of annealing on the photoconductivity of carbon nanofiber/TiO core-shell nanowires for use in dye-sensitized solar cells
Tuesday, July 27, 2010 - 04:19 AM - 3 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
Caitlin Rochford, Zhuang-Zhi Li, Javier Baca, Jianwei Liu, Jun Li et al. Electrical transport properties and photoresponse of individual TiO-coated carbon nanofibers were studied in an attempt to ... (Read More)
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In situ investigation of self-induced GaN nanowire nucleation on Si
Tuesday, July 27, 2010 - 04:19 AM - 3 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
C. Cheze, L. Geelhaar, A. Trampert, and H. Riechert The nucleation of GaN nanowires grown by molecular beam epitaxy on bare Si(111) and Si(001) has been investigated in situ by reflection ... (Read More)
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A mechanical memory with a dc modulation of nonlinear resonance
Saturday, July 24, 2010 - 04:19 AM - 6 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
Hyunho Noh, Seung-Bo Shim, Minkyung Jung, Zheong G. Khim, and Jinhee Kim We present a mechanical memory device based on dynamic motion of a nanoelectromechanical (NEM) resonator. The NEM ... (Read More)
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Method to calculate electric fields at very small tip-sample distances in atomic force microscopy
Saturday, July 24, 2010 - 04:19 AM - 6 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
G. M. Sacha A method to calculate electric magnitudes at very small tip-sample distances in atomic force microscopy is presented. We show that the method accurately calculates the electrostatic ... (Read More)
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Unusual resistance hysteresis in n-layer graphene field effect transistors fabricated on ferroelectric Pb(ZrTi)O
Saturday, July 24, 2010 - 04:19 AM - 6 days, 20 hours ago - Nanotech - AIP Nanoscale science and design
X. Hong, J. Hoffman, A. Posadas, K. Zou, C. H. Ahn et al. We have fabricated n-layer graphene field effect transistors on epitaxial ferroelectric Pb(ZrTi)O (PZT) thin films. At low gate voltages, ... (Read More)
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Ultralow-frequency photocurrent oscillation in ZnO nanowires
Friday, July 23, 2010 - 04:20 AM - 1 week ago - Nanotech - AIP Nanoscale science and design
Zhi-Min Liao, Hong-Zhou Zhang, and Da-Peng Yu We report experimental results of ultralow frequency photocurrent oscillation in individual ZnO nanowires. Consecutive photocurrent and ... (Read More)
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Visualization of droplet departure on a superhydrophobic surface and implications to heat transfer enhancement during dropwise condensation
Thursday, July 22, 2010 - 04:19 AM - 1 week, 1 day ago - Nanotech - AIP Nanoscale science and design
C. Dietz, K. Rykaczewski, A. G. Fedorov, and Y. Joshi Droplet departure frequency is investigated using environmental scanning electron microscopy with implications to enhancing the rate of ... (Read More)
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Functionalized multiwall carbon nanotubes incorporated polymer/fullerene hybrid photovoltaics
Thursday, July 22, 2010 - 04:19 AM - 1 week, 1 day ago - Nanotech - AIP Nanoscale science and design
N. A. Nismy, A. A. D. T. Adikaari, and S. R. P. Silva Multiwall carbon nanotubes are introduced into poly(3-hexylthiophene) and [6,6] phenyl C butyric acid methyl fullerene, bulk heterojunction ... (Read More)
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Pore-size dependence of the thermal conductivity of porous silicon: A phonon hydrodynamic approach
Thursday, July 22, 2010 - 04:19 AM - 1 week, 1 day ago - Nanotech - AIP Nanoscale science and design
F. X. Alvarez, D. Jou, and A. Sellitto Phonon hydrodynamics is used to analyze the influence of porosity and of pore size on reduction in thermal conductivity in porous silicon, with respect to ... (Read More)
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Transform between the permeability and permittivity in the close-packed Ni nanoparticles
Thursday, July 22, 2010 - 04:19 AM - 1 week, 1 day ago - Nanotech - AIP Nanoscale science and design
X. F. Zhang, P. F. Guan, and X. L. Dong We report an anomalously electromagnetic resonance in a simple Ni nanoparticle/paraffin system. The resonance, caused by the near-field interaction of ... (Read More)
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