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Journal of Nanostructured Polymers and Nanocomposites 2011年第4期7卷 112-116页

作者： Chalamalasetty, Siva Naga Sandeep Wejinya, Uchechukwu C. Dong, Zhuxin Meyyappan, Meyya Microelectronics and photonics Graduate program University of Arkansas Fayetteville AR 72701 United States Department of Mechanical Engineering University of Arkansas Fayetteville AR 72701 United States NASA Ames Research Center Moffett Field CA 94035 United States

Composite materials have been a huge success at macroscale. Composites applications can be further enhanced if the manipulation can be done at nano/atomic scale. Conductive polymers are a class of polymers that have been used in the solar cells for a long time. Multiwalled carbon nanotubes (MWCNTs) have been widely used in the area of electrochemical biosensors. The application of MWCNTs can be amplified if the resistance of the carbon nanotubes is decreased further. Thus in the present work, conductive polymer-MWCNT based nanocomposites have been synthesized and the newly developed nanocomposites electrical properties are characterized. Furthermore, the synthesized nanocomposites are coated onto the copper electrode.

关键词： Nanocomposites

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Analysis of Nanoscale Deformation in GaAs(100): Towards Patterned Growth of Quantum Dots

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MRS Online Proceedings Library (OPL) 2011年第1期864卷 E5.7-E5.7页

作者： Curtis R. Taylor Eric A. Stach Ajay P. Malshe Gregory Salamo Department of Physics Microelectronics-photonics Program University of Arkansas Fayetteville AR 72703 U.S.A email: curtis.taylor@uark.edu National Center for Electron Microscopy Materials Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 U.S.A. Department of Mechanical Engineering Microelectronics-photonics Program University of Arkansas Fayetteville AR 72703 U.S.A. email: apm2@engr.uark.edu Department of Physics University of Arkansas Fayetteville AR 72703 U.S.A. Present address: School of Materials Engineering Purdue University West Lafayette IN 47907 U.S.A.

Nanoindentations were created in the GaAs(100) surface to act as strain centers for the controlled nucleation and patterning of InAs quantum dots. A systematic approach is taken to understand the indent deformation processes that may lead to precision patterning capabilities for a broad range of nanostructures. Indents were generated using loads below 450 μN with a sharp cube corner indenter. Site-specific cross-sectional thinning of nanoindents (down to 100 nm in size) has been achieved using the in-situ ‘lift-out’ technique. This allowed for observation of subsurface deformation by transmission electron microscopy (TEM). The crystal was observed to deform solely by dislocation activity with no evidence of amorphization, twinning, fracture, or phase transformation. It is shown that the single phase deformation of GaAs can be well characterized and controlled, which should allow for exploitation of the dislocation strain field to bias nucleation of self-assembled quantum dots.

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Erratum: “Effects of Li content on the structural, optical, and electrical properties of LiZnMgO films” [J. Appl. Phys. 107, 113717 (2010)]

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Journal of Applied Physics 2012年第10期111卷

作者： Chia-Lung Tsai Mu-Shan Wang Ya-Hui Chen Hsing-Cheng Chang Chia-Jyi Liu Ching-Ting Lee Yu-Tai Shih Hsueh-Jung Huang Yow-Jon Lin 1Institute of Photonics National Changhua University of Education Changhua 500 Taiwan 2Department of Physics National Changhua University of Education Changhua 500 Taiwan 3Ph.D. Program in Electrical and Communications Engineering Feng Chia University Taichung 407 Taiwan 4Department of Automatic Control Engineering Feng Chia University Taichung 407 Taiwan 5Institute of Microelectronics Department of Electrical Engineering National Cheng-Kung University Tainan 701 Taiwan

The value of cf was calculated using formula 2cf sin θ = λ [Eq. (1)].1 Equation (1) should be “cf sin θ = λ” instead of “2cf sin θ = λ.” The sentence that reads

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A reduced-cost built-in self test for an FM receiver

A reduced-cost built-in self test for an FM receiver

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作者： Mannath, D. Montano-Martinez, V. Syllaios, I. Bhatara, S. Attaluri, M. Parkar, Z. Ang, S.S. Texas Instruments DallasTX United States Microelectronics-Photonics Program University of Arkansas Fayetteville AR 72701 United States

ISBN: (纸本)9781424495344

This paper describes the methodology used to replace a conventional FM SNR test on a 65nm Texas Instruments radio with a similar test implemented as a Built-in Self Test (BiST). A traditional R square approach was used for the correlation. Data from various changes that affected/improved the correlation is presented. This approach resulted in test cost savings of around 40%. © 2010 IEEE.

关键词： CMOS integrated circuits

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A reduced-cost Built-in Self Test for an FM receiver

A reduced-cost Built-in Self Test for an FM receiver

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Proceedings of the IEEE Dallas Circuits and Systems Workshop (DCAS)

作者： D. Mannath V. Montano-Martinez I. Syllaios S. Bhatara M. Attaluri Z. Parkar S. S. Ang Microelectronics-Photonics Program University of Arkansas Fayetteville AR USA Texas Instruments Inc. Dallas TX USA

关键词： Tin Decision support systems

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A multichannel SPR biosensor with a fixed detection system

A multichannel SPR biosensor with a fixed detection system

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2010亚洲光电子会议先进的传感系统及其应用分会场

作者： Boonsong Sutapun Armote Somboonkaew Ratthasart Amrit Supanit Porntheeraphat Nongluck Houngkamhang Toemsak Srikhirin Photonics Technology Laboratory National Electronics and Computer Technology Center Thai Microelectronics Center National Electronics and Computer Technology Center112 Thailand Science Park Pahol Yothin Rd.Klong LuangPathumthaniThailand 12120 Materials Science and Engineering Program and Physics Department Faculty of ScienceMahidol UniversityRama 6 Rd.RajathaveeBangkok 10400Thailand

Surface plasmon resonance （SPR） sensors with spectral interrogation provide a high refractive index resolution, a large dynamic range and a fixed optical detection module. In this work, we propose a new spectral detection unit that uses only one spectrometer to measure the SPR spectrum from multiple sensing spots rapidly and serially without any mechanical movement. This spectral detection unit is designed based on a spatial light modulator （SLM） configured as a programmable optical aperture for the spectrometer. To demonstrate this concept, a five-channel SPR sensor was built based on the proposed multichannel detection unit and we evaluated the device performance using a refractive index test. The average device refractive index resolution was 1.4 × 10 -6 refractive index units （RIU）.

关键词： Surface plasmon resonance SPR multichannel detection optical biosensor biosensor

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Planar broadband dual-linearly polarized MEMS steerable antenna

Planar broadband dual-linearly polarized MEMS steerable ante...

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Antennas and Propagation Society International Symposium

作者： Douglas A. Woten Magda El-Shenawee Steve Tung Microelectronics-Photonics Program University of Arkansas Fayetteville AR USA Microelectronics-Photonics Program University of Arkansas Fayetteville Arkansas Electrical Engineering Department University of Arkansas Fayetteville Arkansas Mechanical Engineering Department University of Arkansas Fayetteville AR USA Mechanical Engineering Department University of Arkansas Fayetteville Arkansas

In this work we will present the fabrication process and preliminary experimental results of a MEMS steerable broadband antenna. The antenna is designed to fit on a 1cm x 1cm silicon platform with a thin benzocyclobutene (BCB) dielectric coating and operate between 4-9GHz. The modified Fourpoint antenna is simulated using ANSOFT High Frequency Structure Simulator (HFSS) and has a return loss of less than -10dB in the operating band.

关键词： Broadband antennas Polarization Micromechanical devices Metallization Etching Titanium Frequency Copper Fabrication Silicon

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Rotational control of tethered bacterial flagellar motor

Rotational control of tethered bacterial flagellar motor

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2008 8th IEEE Conference on Nanotechnology, IEEE-NANO

作者： Tung, Steve Kim, Jin-Woo Pooran, Ryan Department of Mechanical Engineering Department of Biological and Agricultural Engineering Microelectronics-Photonics Program University of Arkansas Fayetteville AR United States

ISBN: (纸本)9781424421046

Bacterial flagellar motors can be integrated with microfluidic systems to provide mechanical power at the micro- and nanoscale level. This paper describes a non-contact method based on hydrodynamic loading for controlling the rotational behavior of tethered flagellar motors in a microfluidic system. Experimental results indicate that with a small micro channel flow, tethered motors can be slowed down and ultimately stopped completely when the flow-induced torque on the cell body cancels out the torque capability of the motor. By using this technique, it is possible to synchronize the phase angles of multiple motors, which is critical in maximizing the performance of the hybrid flagellar motor-microfluidic system. © 2008 IEEE.

关键词： Microfluidics

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Rotational Control of Tethered Bacterial Flagellar Motor

Rotational Control of Tethered Bacterial Flagellar Motor

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IEEE Conference on Nanotechnology

作者： Steve Tung Jin-Woo Kim Ryan Pooran Department of Mechanical Engineering University of Arkansas Fayetteville AR USA Department of Biological and Agricultural Engineering University of Arkansas Fayetteville AR USA Microelectronics-Photonics Program University of Arkansas Fayetteville AR USA

ISBN: (纸本)9781424421039

关键词： Loading Hydrodynamics Microfluidics Microorganisms Torque Substrates Glass

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Controlling the rotational behavior of bacterial flageller motors

Controlling the rotational behavior of bacterial flageller m...

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International Conference on Information and Automation (ICIA)

作者： Steve Tung Ryan Pooran Jin-Woo Kim Department of Mechanical Engineering University of Arkansas Little Rock Fayetteville AR USA Microelectronics-Photonics Program University of Arkansas Little Rock Fayetteville AR USA Department of Biological and Agricultural Engineering University of Arkansas Little Rock Fayetteville AR USA

Mutant strains of bacterial flagellar motors can be tethered to the sidewalls of microfluidic channels to perform mechanical functions. In most cases, the rotational behavior of the tethered motors must be properly controlled in order to achieve optimized performance. There are several approaches for carrying out this task but most of them involve techniques that affect the viability of the motors. The present paper describes the application of hydrodynamic loading to achieve cell rotation synchronization. This is a non-contact method that uses viscous drag force induced by a small fluid flow to either slow down or stop the motor rotation completely if necessary. No negative effect on the motors is observed when the loading time is kept short. By applying this method to a group of tethered motors, it is possible to stop and restart their rotation for the purpose of synchronization.

关键词： Loading Hydrodynamics Microfluidics Pumps Microorganisms Torque Synchronization

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