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Growth of straight carbon nanotubes by simple thermal chemical vapor deposition

中国有色金属学会会刊（英文版） 2006年第z1期16卷 686-691页

作者： ZOU Xiao-ping H. ABE T. SHIMIZU A. ANDO H. TOKUMOTO ZHU Shen-ming ZHOU Hao-shen Research Center for Sensor Technology Beijing Information Technology Institute Beijing 100101 China Beijing Key Laboratory for Sensor Beijing 100101 China Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Nano-electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Nanotechnology Research Center Research Institute for Electronic Science Hokkaido University Sapporo 001-0021 Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan

Straight carbon nanotubes (CNTs) were achieved by simple thermal chemical vapor deposition(STCVD) catalyzed by Mo-Fe alloy catalyst on silica supporting substrate at 700 ℃. High-resolution transmission electron microscopy images show that the straight CNTs are well graphitized with no attached amorphous carbon. Mo-Fe alloy catalyst particles play a very crucial role in the growth of straight CNTs. The straight carbon nanotubes contain much less defects than the curved nanotubes and might have potential applications for nanoelectrical devices in the future. The simple synthesis of straight CNTs may have benefit for large-scale productions.

关键词： straight carbon nanotubes simple thermal chemical vapor deposition Mo-Fe alloy catalyst

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A nanomechanical protein concentration detector using a nano-gap squeezing actuator with compensated displacement monitoring electrodes 13

A nanomechanical protein concentration detector using a nano...

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13th Solid-State sensors, Actuators, and Microsystems Workshop, Hilton Head 2006

作者： Lee, Won Chul Cho, Young-Ho Pisano, Albert P. Digital Nanolocomotion Center Korea Advanced Institute of Science and Technology Daejeon Korea Republic of Berkeley Sensor and Actuator Center University of California at Berkeley BerkeleyCA United States

ISBN: (纸本)0964002469

We present a new class of the protein concentration detector based on the mechanical stiffness measurement of protein-receptor layers in a squeezed nano-gap. Compared to the previous protein size detector, the present device reduces the distortion and uncertainty in the displacement measurement by adding an actuated nano-gap and reference electrodes. Compared to the conventional protein detectors based on electrochemical, optical, and optomechnical principles, the present device also offers simple, inexpensive, and high-precision protein detection. We design and fabricate the protein concentration detector using an electrothermal actuator and two nano-gaps with reference electrodes. In experimental study, we verify that the present protein detector measures the size of the proteins, streptaividin and m-antibiotin, as 12.1±2.3nm and 13.2±3.3nm at the measurement uncertainty of ±1.1nm, respectively, while showing the concentration detection sensitivity of 2.88N/m/nM in the m-antibiotin concentration range of 5~10nM. © 2006 TRF.

关键词： Proteins

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Electrical measurement on individual multi-walled carbon nanotubes

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中国有色金属学会会刊：英文版 2006年第B02期16卷 772-775页

作者：邹小平 H.ABE T.SHIMIZU A.ANDO H.OKUMOTO 朱申敏周豪慎 Research Center for Sensor Technology Beijing Information Technology Institute Beijing 100101China Beijing Key Laboratory for Sensor Beijing 100101 China Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 HigashiTsukubaIbalaki 305-8562Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST)1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Energy Electronics Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Nanotechnology Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 HigashiTsukubaIbalaki 305-8562Japan Nano-electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan Nanotechnology Research Center Research Institute for Electronic ScienceHokkaido UniversitySapporo 001-0021Japan Energy Electronics Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568Japan

The characterization of electrical property of multi-walled carbon nanotubes (MWCNTs) on a nanometer scale is essential for their potential application in nano-electronic devices. The MWCNTs were synthesized on Fe2O3/SiO2/Si substrate and Pt plate substrate by simple thermal chemical vapor deposition (STCVD) technique and the electrical measurements of individual MWCNT grown on silicon substrate and Pt plate substrate were performed by home-made 'nano-manipulator', respectively. According to current-voltage curves obtained in the experiments the current density that the MWCNTs can carry is calculated to be about 107 A/cm2, which is much larger than that of normal metals.

关键词：多壁碳纳米管电学测量简易热化学汽相沉积合成

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Wide bandwidth vivaldi antenna arrays - Some recent developments

Wide bandwidth vivaldi antenna arrays - Some recent developm...

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European Conference on Antennas and Propagation: EuCAP 2006

作者： Schaubert, D.H. Kasturi, S. Elsallal, M.W. Van Cappellen, W. Antennas and Propagation Laboratory Center for Advanced Sensor and Communication Antennas University of Massachusetts Amherst MA 01002 United States Advanced Technology Center Rockwell Collins Cedar Rapids IA 52498 United States ASTRON 7990 AA Dwingeloo Netherlands

ISBN: (纸本)9290929375

Arrays of Vivaldi tapered slot antennas have become an established technology for wide bandwidth scanning arrays. Antenna bandwidths of 10:1 with scanning to 45° are achievable. To design the array, mutual coupling must be properly included and, in fact, utilized. Therefore, problems have arisen when these arrays are fabricated as independent subarrays without electrical contact between adjacent elements or subarrays. Nevertheless, it is highly beneficial to consider arrays with gaps because it is much easier to fabricate and to repair the array if the elements can be inserted or removed individually or in small groups. This paper presents results of some recent studies of Vivaldi antenna arrays wherein there are gaps between elements and/or subarrays. Such gaps between all elements of an array usually produce severe impedance anomalies that disrupt the operating band of the array. Employing mirror symmetries in arrays of Balanced Antipodal Vivaldi Antennas has eliminated these anomalies over a substantial portion of the operating frequency range with no apparent detrimental effects.

关键词： Antenna arrays

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Electronically scanned arrays of dual-polarized, doubly-mirrored balanced antipodal Vivaldi antennas (DmBAVA) based on modular elements

Electronically scanned arrays of dual-polarized, doubly-mirr...

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Antennas and Propagation Society International Symposium

作者： M.W. Elsallal D.H. Schaubert Advanced Technology Center Rockwell Collins Inc. Cedar Rapids IA USA Center for Advanced Sensor and Communications Antennas Department of Electrical and Computer Engineering University of Massachusetts Amherst MA USA

ISBN: (纸本)1424401224

This work is a continuation to parameter studies of balanced antipodal Vivaldi antenna (BAVA) to achieve broadband, electronically scanned arrays (ESA). Numerical simulations to evaluate the transformation of single polarized (SP) doubly-mirrored balanced antipodal Vivaldi antenna (DmBAVA) into a dual-polarized (DP) array are presented. Scan performance shows the widest bandwidth known for DP-DmBAVA antennas while maintaining SP-DmBAVA's superior features; reduced-height (~lambda Highest-Frequency /2), more than octave bandwidth, wide scan-angle and modular elements

关键词： Antenna arrays Vivaldi antennas Bandwidth Dielectric substrates Frequency sensor arrays Apertures Dielectric losses Shape control Gratings

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Growth of straight carbon nanotubes by simple thermal chemical vapor deposition

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中国有色金属学会会刊：英文版 2006年第B02期16卷 689-691页

作者：邹小平 H.ABE T.SHIMIZU A.ANDO H.TOKUMOTO 朱申敏周豪慎 Research Center for Sensor Technology Beijing Information Technology Institute Beijing 100101China Beijing Key Laboratory for Sensor Beijing 100101China Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST)1-1-1 HigashiTsukubaIbalaki 305-8562Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST)1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 HigashiTsukuba Ibalaki 305-8562 Japan Nano-electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono TsukubaIbalaki 305-8568 Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Nanotechnology Research Center Research Institute for Electronic Science Hokkaido University Sapporo 001-0021Japan Energy Electronics Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 UmezonoTsukubaIbalaki 305-8568Japan

Straight carbon nanotubes (CNTs) were achieved by simple thermal chemical vapor deposition(STCVD) catalyzed by Mo-Fe alloy catalyst on silica supporting substrate at 700℃. High-resolution transmission electron microscopy images show that the straight CNTs are well graphitized with no attached amorphous carbon. Mo-Fe alloy catalyst particles play a very crucial role in the growth of straight CNTs. The straight carbon nanotubes contain much less defects than the curved nanotubes and might have potential applications for nanoelectrical devices in the future. The simple synthesis of straight CNTs may have benefit for large-scale productions.

关键词：碳纳米管直管生长简易热化学汽相沉积 Mo-Fe合金催化剂

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A frequency-tunable microactuator with a varied comb-width profile

A frequency-tunable microactuator with a varied comb-width p...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： Ki Bang Lee L. Lin Young-Ho Cho Berkeley Sensor and Actuator Center Department of Mechanical Engineering University of California Berkeley Berkeley CA USA Digital Nanolocomotion Center Department of Biosystems Korea Advanced Institute of Science and Technology South Korea

A frequency-tunable microactuator with a varied comb-width profile for electrostatic, post-fabrication frequency tuning has been demonstrated. The theoretical comb-width profile was derived to obtain a constant electrostatic stiffness, independent of the position of the combs. A tunable microactuator, having 186 pairs of the varied comb-width profile, was designed and fabricated by the standard surface micromachining process. Under a biased voltage of 150 V, the resonant frequency was tuned and reduced by 55% from the initial resonant frequency of 19 kHz and the corresponding effective stiffness was decreased 80% from the initial value of 2.64 N/m. As such, this scheme can be applied to comb-shape, electrostatic-based microsensors and microactuators for active frequency tuning applications.

关键词： Microactuators Fingers Electrostatics Voltage control Resonant frequency Tuning Space stations Shape Displacement control Microstructure

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ATLAS multlspectral sensor calibration and right test results

ATLAS multlspectral sensor calibration and right test result...

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Recent Advances in sensors, Radiometric Calibration, and Processing of Remotely Sensed Data 1993

作者： DaMommio, T. Kuo, S. Advanced Sensor Development Laboratory Sverdrup Technology Inc. Stennis Space Center MS39529 United States

The ATLAS (Airborne Terrestrial Applications sensor) is a 15-channel multispectral scanning imager, currently under development for NASA's Commercial Remote Sensing Program (CRSP) Office. The sensor package utilizes a rotating linescan mirror, and a modified Dall-Kirkham telescope with a 7.5-inch clear aperture and 2.0 mrad ifov. Scan rates are adjustable from 6-50 rev/sec, with a total field of view of ∼ 73°. Three spectrometers with grating dispersive elements are used to provide wide spectral coverage, shown below: o VIS/NIR, 6 channels: 0.45-0.90 μm o SW/MWIR, 3 channels: 1.55-4.20 μm o TIR, 6 channels: 8.2-12.2 μm. Blackbody sources (hi/o) and a modified integrating sphere source, built into the scanhead, are employed to provide in-flight radiometric calibration data for quantitative inference of ground scene temperatures and radiance values. In this paper, the overall design of the ATLAS scanner system is reviewed. Results of spectral response, NETD, NER and MTF calibration measurements are presented for each channel. Additionally, some initial ATLAS flight test data and analysis are described, including SNR, uniformity of TIR data over water, overall image quality and other results. © 1993 SPIE. All rights reserved.

关键词： NASA

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NAVY HIGH-ENERGY LASER-WEAPON SYSTEM

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NAVAL ENGINEERS JOURNAL 1993年第3期105卷 105-117页

作者： FERREIRA, DM MARCELL, FC David M. Ferreira:is the program manager for high power microwave and laser applications and the exploratory development technology block program manager for laser technology and high power microwave technology in the Directed Energy Program at the Space and Naval Warfare Systems Command (SpaWar). His 20 years experience includes project engineer for shipboard infrared countermeasures and advanced development infrared decoys at the Naval Ship Engineering Center. project engineer for advanced development infrared search and track systems in the Reconnaissance Electronic Warfare and Special Operations Navy (REWSON) Project Office Naval Electronic Systems Command HEL beam control manager in the High Energy Laser Project Naval Sea Systems Command and System Engineering Division director Naval Warfare System Architecture and Engineering Directorate Space and Naval Warfare Systems Command. His current position is manager of high power microwave and laser applications in the Directed Energy Weapons Division of SpaWar. Mr. Ferreira holds an AA from City College of San Francisco a BS(EE) from the University of Colorado and an MBA from George Mason University. Frederick C. Marcell:is the leader Electro-Optics Systems Space and Defense Systems Group W. J. Schafer Associates (WJSA) Washington Operations. With more than 15 years experience in electro-optic sensors and laser technology development he is responsible for Navy SDIO and other industry programs in the laser radar and electro-optic sensor business areas. He provides scientific engineering and program management support to government and industry in technology assessment and system development programs. Mr. Marcell came to WJSA following 27 years of naval service in both sea and technical billets. As an engineering duty officer he served in technical program management positions at the Naval Surface Warfare Center working on the ANISAR-8 IRST and at The Navy Directed Energy Weapons Program Office working on the High Energy Laser and managing the SDIO

This paper will historically review and describe the Navy High Energy Laser Weapon System (HELWS). Advances in anti-ship cruise missiles (ASMs), which present the greatest challenge in surface ship self defense, are necessitating the development of significantly more sophisticated and expensive surface-to-air missiles in order to counter the threat. The next generation of ASMs, as represented by the French ANS, will be capable of skimming only meters above the sea surface at multi-mach speeds, while performing evasive maneuvers during terminal run-in. This type of threat has essentially eliminated naval gun systems from the role of ship self-defense, and has significantly reduced the effectiveness of cu''ent missile systems. Under development for the past twenty years, the High Energy Chemical Laser appears to be a feasible solution to the ship self-defense problem. Capable of operating effectively in all weather conditions except dense fog, a HELWS requires no conventional rire control solution, since it operates at the speed of light. Any target that can be tracked can be enpged. Furthermore, once the beam director is locked onto a target, the system is insensitive to target maneuvers. By tailoring the lase period to the threat, the effective P(k) of an HELWS is essentially 1. Using chemical energy as a primary power source removes the requirement for additional costly and heavy power generation equipment aboard ship. In the context of the foregoing arguments, cost per kill becomes a fraction of the cost of a two-round missile salvo. The technology required to field a shipboard HELWS has been demonstrated by the Navy Mid-InfraRed advanced Chemical Laser (MIRACL) and the Sea Lite Beam Director (SLBD). Its success in bringing down a Mach 2.2 Vandal missile in 1989 was dramatic proof of the effectiveness of such a system. Recent studies have shown that the MIRACL/SLBD can be repackaged as a HELWS to fit into the equivalent volume occupied by a 5''154 Mk 45 gun mount

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A TASK-DRIVEN APPROACH TO KNOWLEDGE ACQUISITION, ANALYSIS AND REPRESENTATION FOR INTELLIGENT TRAINING SYSTEMS

A TASK-DRIVEN APPROACH TO KNOWLEDGE ACQUISITION, ANALYSIS AN...

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1992 IEEE International Conference on Systems, Man, and Cybernetics

作者： BLOOM, C BULLEMER, P CHU, R VILLANO, M Cognitive Sciences Section Honeywell Sensor and System Development Center 3660 Technology Dr. Minneapolis 55418 MN United States US WEST Advanced Technologies 4001 Discovery Drive Boulder 80303 CO United States

ISBN: (纸本)0780307208

This paper presents work in progress to develop a task driven approach to acquiring, analyzing and representing knowledge for an intelligent tutoring system (ITS). Our research premise is that using a task model approach provides direction and infrastructure for acquiring, analyzing and representing domain-specific knowledge, and enables the development of an ITS that teaches domain users to perform tasks in the right way at the right time. © 1992 IEEE.

关键词： Domain Knowledge

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