APL: Nanoscale Science and Design http://scitation.aip.org/ APL: Nanoscale Science and Design Controlling the conformations and transport of DNA by free energy landscaping http://link.aip.org/link/?APL/99/263112/1&agg=rss Elijah Shelton, Zhijun Jiang, Shutong Wang, and Derek Stein<br/> We demonstrate free energy landscaping, a method for controlling the transport and conformations of DNA in nanofluidic devices with a nanotopography. A device that funnels molecules into traps where they adopt the shapes of letters illustrates the principle. We analyze how the nanotopography establi ... [Appl. Phys. Lett. 99, 263112 (2011)] published Fri Dec 30, 2011. Suppressed blinking behavior of thioglycolic acid capped CdTe quantum dot by amine functionalization http://link.aip.org/link/?APL/99/263111/1&agg=rss Abhijit Mandal and Naoto Tamai<br/> Prepared water soluble thioglycolic acid capped CdTe quantum dots (QDs) were further surface functionalized by ethylene diamine (EDA). Amine functionalized CdTe QDs demonstrate enhanced luminescence intensity at ensemble measurements and suppressed luminescence intermittency behavior at the single m ... [Appl. Phys. Lett. 99, 263111 (2011)] published Fri Dec 30, 2011. Direct imaging of the spatial diffusion of excitons in single semiconductor nanowires http://link.aip.org/link/?APL/99/263110/1&agg=rss M. A. Fickenscher, H. E. Jackson, L. M. Smith, J. M. Yarrison-Rice, J. H. Kang et al.<br/> We use spatially and temporally resolved photoluminescence to measure exciton diffusion in single zinc blende GaAs/AlGaAs core/shell and mixed phase InP nanowires. Excitons in the single phase GaAs/AlGaAs nanowires are seen to diffuse rapidly throughout the nanowire with a measured diffusion constan ... [Appl. Phys. Lett. 99, 263110 (2011)] published Thu Dec 29, 2011. Size effect on magnetic coupling in all-ferromagnetic superlattices http://link.aip.org/link/?APL/99/263108/1&agg=rss P. Padhan and W. Prellier<br/> The switching of ferromagnetic-to-antiferromagnetic coupling of magnetization in the superlattices consisting of two ferromagnetic metals LaSrMnO (LSMO) and SrRuO (SRO) grown on (001) oriented SrTiO has been observed by changing the orientation of the field from outofplane to inplane direction. Such ... [Appl. Phys. Lett. 99, 263108 (2011)] published Thu Dec 29, 2011. Balanced ternary addition using a gated silicon nanowire http://link.aip.org/link/?APL/99/263109/1&agg=rss J. A. Mol, J. van der Heijden, J. Verduijn, M. Klein, F. Remacle et al.<br/> Ternary logic has the lowest cost of complexity, here, we demonstrate a CMOS hardware implementation of a ternary adder using a silicon metal-on-insulator single electron transistor. Gate dependent rectifying behavior of a single electron transistor (SET) results in a robust three-valued output as a ... [Appl. Phys. Lett. 99, 263109 (2011)] published Thu Dec 29, 2011. Simultaneous step meandering and bunching instabilities controlled by Ehrlich-Schwoebel barrier and elastic interaction http://link.aip.org/link/?APL/99/263106/1&agg=rss Yan-Mei Yu, Axel Voigt, Xiaoshu Guo, and Yong Liu<br/> Through phase-field simulations, we investigate simultaneous step meandering and bunching instabilities with the presence of Ehrlich-Schwoebel barrier and elastic interaction. The meandering instability induced by the Ehrlich-Schwoebel barrier is found to be dependent on the elastic interaction at l ... [Appl. Phys. Lett. 99, 263106 (2011)] published Thu Dec 29, 2011. Electrical noise characteristics of a doped silicon microcantilever heater-thermometer http://link.aip.org/link/?APL/99/263107/1&agg=rss Elise A. Corbin and William P. King<br/> We measure the electrical noise characteristics of doped silicon microcantilevers during cantilever self-heating over the temperature range 296781 K. The dominant noise source is 1/f below about 10 kHz, while at higher frequency, the dominant noise source is Johnson noise. The 1/f noise matches the ... [Appl. Phys. Lett. 99, 263107 (2011)] published Thu Dec 29, 2011. Dependence of carbon nanotube field effect transistors performance on doping level of channel at different diameters: On/off current ratio http://link.aip.org/link/?APL/99/263104/1&agg=rss Shaahin G. Shirazi and Sattar Mirzakuchaki<br/> Choosing a suitable doping level of channel relevant to channel diameter is considered for determining the carbon nanotube field effect transistors' performance which seem to be the best substitute of current transistor technology. For low diameter values of channel, the ratio of on/off current decl ... [Appl. Phys. Lett. 99, 263104 (2011)] published Wed Dec 28, 2011. Room-temperature quantum-dot-like luminescence from site-controlled InGaN quantum disks http://link.aip.org/link/?APL/99/263105/1&agg=rss L. K. Lee, Lei Zhang, Hui Deng, and P.-C. Ku<br/> We studied the optical properties of site-controlled InGaN quantum disks fabricated by the top-down approach. Room-temperature quantum-dot-like photoluminescence was observed from a single InGaN quantum disk. Size-dependent emission wavelength shift was measured and attributed to the quantum confine ... [Appl. Phys. Lett. 99, 263105 (2011)] published Wed Dec 28, 2011. Evolution of sheet resistance of thin Ni film deposited on porous anodic alumina substrate http://link.aip.org/link/?APL/99/263103/1&agg=rss Aree Song, Chul Sung Kim, and Taejoon Kouh<br/> We have investigated the evolution of sheet resistance of thin nickel films, thermally evaporated on porous alumina substrates, based on in situ electron transport measurement. By comparing the porous films, having various surface area fractions, to the uniform film, following the scaling law in met ... [Appl. Phys. Lett. 99, 263103 (2011)] published Wed Dec 28, 2011. Fundamental limits in the external quantum efficiency of single nanowire solar cells http://link.aip.org/link/?APL/99/263102/1&agg=rss Martin Heiss and Anna Fontcuberta i Morral<br/> The fundamental limits for the measurement of the efficiency of single nanowire solar cell devices are presented. We evaluate the effect of the substrate, light polarization, and existence of Mie resonances in the absorption of the solar spectrum for nanowires with diameters from 10 to 300 nm. We fi ... [Appl. Phys. Lett. 99, 263102 (2011)] published Tue Dec 27, 2011. Trap-state whispering-gallery mode lasing from high-quality tin-doped CdS whiskers http://link.aip.org/link/?APL/99/263101/1&agg=rss R. B. Liu, X. J. Zhuang, J. Y. Xu, D. B. Li, Q. L. Zhang et al.<br/> High-quality surface tin-doped hexagonal CdS whiskers were synthesized by a well-controlled in situ source exchange chemical vapor deposition route. Under local light excitation, the detected microphotoluminescence from any positions along the length of these whiskers exhibits strong and multi-mode ... [Appl. Phys. Lett. 99, 263101 (2011)] published Tue Dec 27, 2011. The effects of 100 nm-diameter Au nanoparticles on dye-sensitized solar cells http://link.aip.org/link/?APL/99/253107/1&agg=rss Changwoo Nahm, Hongsik Choi, Jongmin Kim, Dae-Ryong Jung, Chohui Kim et al.<br/> Gold nanoparticles of ~100 nm in diameter were incorporated into TiO nanoparticles for dye-sensitized solar cells (DSSCs). At the optimum Au/TiO mass ratio of 0.05, the power-conversion efficiency of the DSSC improved to 3.3% from a value of 2.7% without Au, and this improvement was mainly attribute ... [Appl. Phys. Lett. 99, 253107 (2011)] published Thu Dec 22, 2011. Room-temperature ground magnetic state of [eh]-FeO: In-field Mossbauer spectroscopy evidence for collinear ferrimagnet http://link.aip.org/link/?APL/99/253108/1&agg=rss Jiri Tucek, Shin-ichi Ohkoshi, and Radek Zboril<br/> [eh]-FeO is a remarkable iron(III) oxide polymorph exhibiting a large room-temperature (RT) coercive field, coupled magnetoelectric properties, and millimeter-wave ferromagnetic resonance. Despite great application potential, its room-temperature ground magnetic state is still under scrutiny. Employ ... [Appl. Phys. Lett. 99, 253108 (2011)] published Thu Dec 22, 2011. Low temperature synthesis of c-BN films http://link.aip.org/link/?APL/99/253109/1&agg=rss M. Sajjad and P. X. Feng<br/> A simple approach is demonstrated to synthesize cubic boron nitride (c-BN) films at significantly low substrate temperature (450 degrees C) using ferrous oxide nanoparticles as catalyst. The catalyst helped to create reactive species of BN and transform the initially grown hexagonal boron nitride b ... [Appl. Phys. Lett. 99, 253109 (2011)] published Thu Dec 22, 2011. Polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber in the near infrared regime http://link.aip.org/link/?APL/99/253104/1&agg=rss Shuqi Chen, Hua Cheng, Haifang Yang, Junjie Li, Xiaoyang Duan et al.<br/> We present the design, characterization, and experimental demonstration of a polarization insensitive and omnidirectional broadband near perfect planar metamaterial absorber (MA) in the near infrared regime, which does not need to stack multilayer composite structures. Experimental result shows that ... [Appl. Phys. Lett. 99, 253104 (2011)] published Wed Dec 21, 2011. Degenerate p-doping of InP nanowires for large area tunnel diodes http://link.aip.org/link/?APL/99/253105/1&agg=rss Jesper Wallentin, Peter Wickert, Martin Ek, Anders Gustafsson, L. Reine Wallenberg et al.<br/> We have investigated p-doping of InP nanowires using diethyl zinc. Two-terminal devices showed non-linear source-drain characteristics and p-type gate dependence. Electron beam induced current measurements were employed to determine minority carrier diffusion lengths. We used large-area tunnel diode ... [Appl. Phys. Lett. 99, 253105 (2011)] published Wed Dec 21, 2011. DNA hybridization detection in a miniaturized electromagnetic band gap resonator http://link.aip.org/link/?APL/99/253106/1&agg=rss Mircea Dragoman, Alina Cismaru, Antonio Radoi, Marius Voicu, and Daniela Dragoman<br/> The hybridization of the deoxyribonucleic acid (DNA) is sensed in a miniaturized electromagnetic band gap resonator, which has a resonance frequency f=17.3 GHz when unloaded. The resonance frequency f is shifted to the left when a single-stranded DNA is immobilized on the resonator and to the right ... [Appl. Phys. Lett. 99, 253106 (2011)] published Wed Dec 21, 2011. Modal dependence of dissipation in silicon nitride drum resonators http://link.aip.org/link/?APL/99/253103/1&agg=rss V. P. Adiga, B. Ilic, R. A. Barton, I. Wilson-Rae, H. G. Craighead et al.<br/> We have fabricated large (<=400 [mu]m diameter) high tensile stress SiN membrane mechanical resonators and measured the resonant frequency and quality factors (Q) of different modes of oscillation using optical interferometric detection. We observe that the dissipation (Q) is limited by clamping los ... [Appl. Phys. Lett. 99, 253103 (2011)] published Tue Dec 20, 2011. High resolution patterning of nanoparticles by evaporative self-assembly enabled by in situ creation and mechanical lift-off of a polymer template http://link.aip.org/link/?APL/99/253102/1&agg=rss Michael T. Demko, Sun Choi, Tarek I. Zohdi, and Albert P. Pisano<br/> High-resolution patterning of nanostructured materials into open templates is limited by the processes of creation and removal of the necessary template. In this work, a process for forming a micropatterned template from cellulose acetate polymer in situ on the substrate is demonstrated. Nanoparticl ... [Appl. Phys. Lett. 99, 253102 (2011)] published Tue Dec 20, 2011. A thin film broadband absorber based on multi-sized nanoantennas http://link.aip.org/link/?APL/99/253101/1&agg=rss Yanxia Cui, Jun Xu, Kin Hung Fung, Yi Jin, Anil Kumar et al.<br/> We experimentally demonstrate an infrared broadband absorber based on an array of nanostrip antennas of several different sizes. The broadband property is due to the collective effect of magnetic responses excited by these nanoantennas at distinct wavelengths. By manipulating the differences of the ... [Appl. Phys. Lett. 99, 253101 (2011)] published Mon Dec 19, 2011.