检索结果-内蒙古大学图书馆

8th International Conference on solid-state sensors and Actuators (Eurosensors IX)

作者： Noetzel, J Tonnesen, T Benecke, W Binder, J Mader, G SIEMENS AG AUTOMOT SYST GRP D-93049 REGENSBURG GERMANY

This paper describe the development of a quasianalog accelerometer which uses an array of acceleration switches. The investigations are based on results or fabricated and evaluated single-microswitch sensors. The new acceleration sensor concept combines the advantage of high EMI immunity and simple signal pre-conditioning circuitry. Important characteristics of the laterally moving cantilevers, such as resonance frequency and switching time, can he determined by a single mask. First test devices have been fabricated by the use of a special sacrificial-layer additive technology. This Microform technology combines UV patterning of very thick photoresist layers and moulding of the resulting patterns by electroplated metals. This technology is used for the fabrication of laterally driven microswitches, each having a different acceleration threshold. tinder an applied acceleration, the cantilever beam deflects laterally and closes a contact with an electrode. With an electrode on each side of the cantilever, two directions of acceleration can be measured. A simulation model has been developed which enables the design of quasianalog sensors for different applications. Different layouts are created to investigate the basic characteristics. The simulation results are verified on a shaker using the fabricated lest structures of a single-microswitch sensor.

关键词： accelerometers arrays microswitches

来源：评论

学校读者我要写书评

暂无评论

applications and advances in coordination cages: Metal-Organic Frameworks

引用

VACUUM 2019年 167卷 287-300页

作者： Katoch, Abhishek Goyal, Navdeep Gautam, Sanjeev Panjab Univ Dr SS Bhatnagar Univ Inst Chem Engn & Technol Adv Funct Mat Lab Chandigarh 160014 India Punjab Univ Dept Phys Chandigarh 160014 India

Advances in material science and nanotechnology permits combination of new materials with tuned physical, chemical and optical properties with high effectiveness. These multifunctional materials has wide areas of application in gas sensors/separators, membranes, catalysis etc. Air and water quality monitoring, food-safety, medicine, defense are the important fields require a novel tectmology for fabricating a device having desirable characteristics such as low power requirements, selectivity, sensitivity and stability. Metal-Organic Framework (MOF) is a widely studied porous nanomaterial due to its exceptional degree of flexibility for both organic/inorganic ligands in the structure, which differentiate it from other organic nanostructure. The known strategies used in MOF synthesis, includes different synthesis routes, precursor concentration, temperature and pressure plays a precious role in view of the above required applications. This review article compiles and recounts the extending traits and behavior of MOF, synthetic route, nucleation and growth corresponding with applications, introduction to its structure and various results analysis in comprehensive way. The detailed discussion of MOF nanomaterial as chemical sensor and the historical background of porous nanomaterial in solid state chemistry is presented.

关键词： Metal-organic framework (MOP) Drug delivery Chemical sensors Microporous Mesoporous

来源：评论

学校读者我要写书评

暂无评论

The development of 3^rd Gen IR Detectors at AIM

The Development of 3<SUP>rd</SUP> Gen IR Detectors at AIM

引用

Conference on Infrared Technology and applications XXXVii

作者： Ziegler, J. Eich, D. Mahlein, M. Schallenberg, T. Scheibner, R. Wendler, J. Wenisch, J. Wollrab, R. Daumer, V. Rehm, R. Rutz, F. Walther, M. AIM Infrarot Module GmbH Theresienstr 2 D-74072 Heilbronn Germany Fraunhofer Inst Appl Solid State Phys D-79108 Freiburg Germany

ISBN: (纸本)9780819485861

3rd generation IR modules - dual-color (DC), dual-band (DB), and large format two-dimensional arrays - require sophisticated production technologies such as molecular beam epitaxy (MBE) as well as new array processing techniques, which can satisfy the rising demand for increasingly complex device structures and low cost detectors. AIM will extend its future portfolio by high performance devices which make use of these techniques. The DC MW / MW detectors are based on antimonide type-ii superlattices (produced by MBE at Fraunhofer IAF, Freiburg) in the 384x288 format with a 40 mu m pitch. For AIM, the technology of choice for MW / LW DB FPAs is MCT MBE on CdZnTe substrates, which has been developed in cooperation with IAF, Freiburg. 640x512, 20 mu m pitch Focal Plane arrays (FPAs) have been processed at AIM. The growth of MW MCT MBE layers on alternate substrates is challenging, but essential for competitive fabrication of large two-dimensional arrays such as megapixel (MW 1280x1024, 15 mu m pitch) FPAs. This paper will present the development status and latest results of the above-mentioned 3rd Gen FPAs and Integrated Detector Cooler Assemblies (IDCAs).

关键词： Infrared detectors 3rd generation detectors HgCdTe MCT dual color dual band MW / LW megapixel MBE antimonide type-ii superlattices T2SL

来源：评论

学校读者我要写书评

暂无评论

development of a CdZnTe-based small field of view gamma camera

Development of a CdZnTe-based small field of view gamma came...

引用

Conference on Penetrating Radiation Systems and applications iiI

作者： Parnham, K Grosholz, J Davis, RK Vydrin, S Cupec, CA II VI Inc Ev Prod Saxonburg PA 16056 USA

ISBN: (纸本)0819442224

The interest in the use of CdZnTe room-temperature, solid-state detectors for Nuclear Medicine applications continues to grow. Efforts are underway at several companies and institutes to develop CdZnTe detector systems to compete with existing scintillator-based Large Field of View (LFOV) gamma cameras. eV PRODUCTS is focusing on the development of Small Field of View (SFOV) gamma cameras using monolithic CdZnTe detector arrays coupled to custom designed, low noise analog read-out electronics. Electronic noise in the ASIC's has been minimized, and is typically less than 100 e rms (OpF). The detector readout system has the capability to perform automatic energy calibration, gain setting and discrimator level setting, along with a comprehensive self-diagnostic routine. The complete integrated unit includes a bias voltage generator, counters and communication control. A first prototype 256-channel device has been developed and constructed, with pixel dimensions of 1.8 x 1.8 mm(2), on a 34 x 34 x 5mm3 monolithic CdZnTe detector. Results obtained from this system will be presented, showing both the energy resolution and uniformity data for several arrays. The energy resolution has been demonstrated to be 3-5% FWHM @ 140 keV, with photopeak efficiencies of 70-80%.

关键词： CdZnTe small field of view gamma camera ASIC energy resolution photopeak efficiency

来源：评论

学校读者我要写书评

暂无评论

A 47.14-$\mu\text{W}$ 200-MHz MOS/MTJ-Hybrid Nonvolatile Microcontroller Unit Embedding STT-MRAM and FPGA for IoT applications

引用

IEEE JOURNAL OF solid-state CIRCUITS 2019年第11期54卷 2991-3004页

作者： Natsui, Masanori Suzuki, Daisuke Tamakoshi, Akira Watanabe, Toshinari Honjo, Hiroaki Koike, Hiroki Nasuno, Takashi Ma, Yitao Tanigawa, Takaho Noguchi, Yasuo Yasuhira, Mitsuo Sato, Hideo Ikeda, Shoji Ohn, Hideo Endoh, Tetsuo Hanyu, Takahiro Tohoku Univ Res Inst Elect Commun Lab Brainware Syst Sendai Miyagi 9808577 Japan Tohoku Univ Ctr Spintron Integrated Syst Sendai Miyagi 9808577 Japan Tohoku Univ Ctr Innovat Integrated Elect Syst Sendai Miyagi 9808577 Japan Tohoku Univ Res Inst Elect Commun Sendai Miyagi 9808577 Japan Tohoku Univ Ctr Innovat Integrated Elect Syst Sendai Miyagi 9808572 Japan Tohoku Univ Ctr Spintron Integrated Syst Grad Sch Engn Sendai Miyagi 9808572 Japan Tohoku Univ Ctr Spintron Integrated Syst Sendai Miyagi 9808572 Japan Tohoku Univ Ctr Spintron Res Network Sendai Miyagi 9808572 Japan Tohoku Univ Res Inst Elect Commun Sendai Miyagi 9808572 Japan Tohoku Univ WPI Adv Inst Mat Res Sendai Miyagi 9808577 Japan Tohoku Univ Ctr Spintron Res Network Sendai Miyagi 9808577 Japan Tohoku Univ Grad Sch Engn Sendai Miyagi 9808572 Japan

The demand for energy-efficient, high-performance microcontroller units (MCUs) for the use in power-supply-critical Internet-of-Things (IoT) sensor-node applications has witnessed a substantial increase. In response, research concerning the development of several low-power-consuming MCUs has been actively pursued. The performance level of such MCUs, however, has not been sufficient, thereby rendering them non-feasible for the use in IoT sensor-node applications that process a large number of received signals immediately followed by extraction of valuable information from them to limit data transferred to a data center. To realize next-generation IoT systems based on intelligent sensor-node application, ultra-low-power high-performance MCUs need to be developed. This paper presents an ultra-low-power-consuming and high-performance MCU configuration based on the spintronics device technology, using which all modules are non-volatilized, and any wasteful power consumption is eliminated by controlling the power supplied independently to each module. By incorporating a reconfigurable accelerator module, for performing various signal-processing procedures in sensor-node applications, and a memory controller, which can speed up the entire system by relaxing the data-transfer bottleneck of logic and memory, the proposed MCU configuration achieves ultra-low power consumption and high-speed operation. As confirmed by the results obtained via measurements performed on a fabricated chip, the proposed MCU design, on average, consumed 47.14 $\mu \text{W}$ power at an operating frequency of 200 MHz. This corresponds to the world's highest signal-processing performance and energy efficiency of highly functional IoT sensor nodes powered by harvested energy

关键词： Nonvolatile memory Spintronics Performance evaluation Magnetic tunneling Central Processing Unit Memory management Standards Energy harvesting field-programmable gate arrays Internet of Things magnetic tunnel junction microcontroller unit (MCU) spin-transfer-torque magnetoresistive random access memory (STT-MRAM)

来源：评论

学校读者我要写书评

暂无评论

Thin-film microsensors for high-temperature gas detection arrays

Thin-film microsensors for high-temperature gas detection ar...

引用

作者： Ward, Benjamin James Case Western Reserve University

学位级别：Ph.D.

Improvements in the control of engine and power generator exhausts, fire detection, and environmental monitoring can be achieved through the development of improved sensing methods. This study focused on the development of high temperature gas sensor arrays for use in these applications. sensors based on metal oxide resistors, specifically variations of tin oxide resistors and electrochemical cells were produced using microfabrication and micromachining techniques. The use of these techniques resulted in small, rugged sensors which can be produced in a repeatable manner. These sensors were designed to be usable in high temperature engine exhaust streams, but can be used in a wide range of environments due to the integration of a heater and temperature detector on chip for temperature control. Tin oxide thin films were deposited using a sol-gel technique. Three types of tin oxide sensing films were studied, including undoped tin oxide, platinum doped tin oxide, and a copper surface treated (by dip coating) tin oxide. These devices showed very different sensitivities to test gases in laboratory calibrations and were tested in several exhaust and fire-simulation systems. Two types of electrochemical cell devices were studied, including yttria stabilized zirconia (YSZ) for oxygen detection and a NASICON (sodium super ionic conductor)/sodium carbonate system for carbon dioxide detection. These sensors were operated in amperometric, diffusion limited mode. Both were produced on a generic “platform” for solid state, amperometric electrochemical microsensors. Laboratory testing showed sensitivity of these sensors to the gases of interest. Three separate designs of the YSZ sensor were investigated. Output currents on the order of 30 nA in nitrogen and 80 nA in air were noted. The diffusion barrier was not optimum for the desired linear change in output current compared to oxygen concentration. The NASICON based sensor included the novel processing step of electron beam evapo

关键词：

来源：评论

学校读者我要写书评

暂无评论

A research port test bed based on distributed optical sensors and sensor fusion framework for ad hoc situational awareness

引用

JOURNAL OF sensorS AND sensor SYSTEMS 2017年第1期6卷 37-52页

作者： Ruessmeier, Nick Hahn, Axel Nicklas, Daniela Zielinski, Oliver Carl von Ossietzky Univ Oldenburg Inst Chem & Biol Marine Environm D-26382 Wilhelmshaven Germany Carl von Ossietzky Univ Oldenburg Dept Comp Sci D-26129 Oldenburg Germany Univ Bamberg Fac Informat Syst & Appl Comp Sci D-96045 Bamberg Germany

Maritime study sites utilized as a physical experimental test bed for sensor data fusion, communication technology and data stream analysis tools can provide substantial frameworks for design and development of e-navigation technologies. Increasing safety by observation and monitoring of the maritime environment by new technologies meets forward-looking needs to facilitate situational awareness. Further, such test beds offer a solid basis for standardizing new technologies to advance growth by reducing "time to market" of up-to-date industrial products and technologies. Especially optical sensor technologies are well suited to provide a situational and marine environmental assessment of waterways for ( i) online detection of relevant situations, ( ii) collection of data for further analysis and ( iii) reuse of data, e.g. for training or testing of assistant systems. The test bed set-up has to consider maintainability, flexibility and extensibility for efficient test set-ups. This means that new use cases and applications within the test bed infrastructure, here presented by a research port, can be easily developed and extended by installing new sensors, actuators and software components. Furthermore, the system supports reliable remote communication between onshore and offshore participants. A series of in situ experiments at the research port of Bremerhaven and in other maritime environments were performed, representing applications and scenarios to demonstrate the capability for the proposed system framework and design.

关键词： Application programs

来源：评论

学校读者我要写书评

暂无评论

Type-ii superlattices - a promising material for space applications

Type-II superlattices - a promising material for space appli...

引用

International Conference on Space Optics (ICSO)

作者： Daumer, V. Rutz, F. Woerl, A. Niemasz, J. Mueller, R. Stadelmann, T. Rehm, R. Fraunhofer Inst Appl Solid State Phys IAF Tullastr 72 D-79108 Freiburg Germany

ISBN: (纸本)9781510630772

Type-ii superlattices (T2SLs) are currently recognized as the sole material system offering comparable performance to HgCdTe, yet providing higher operability, stability over time, spatial uniformity, scalability to larger formats, producibility and affordability. Hence, T2SL technology is very promising for space applications. Fraunhofer IAF played a vital role in the development of iiI-As/Sb T2SLs right from the beginning. Mono- and bi-spectral focal plane arrays up to 640x512 pixels for the mid- and long-wavelength infrared (IR) have been demonstrated. The growth of T2SL is performed by molecular beam epitaxy (MBE) in multi-wafer reactors. We report on the excellent homogeneity and reproducibility of the growth process, established in the past years at Fraunhofer IAF. After processing this material to detector arrays, the T2SL detectors have been characterized down to low temperatures (below 40K) with promising properties regarding the dark current. For MWIR and LWIR detectors the resolution limit of the measurement setup with a dark current density of 2x10(-10) A/cm(2) has been reached at 77 K and 36 K, respectively.

关键词： MWIR LWIR InAs/GaSb type-ii superlattice T2SL molecular beam epitaxy MBE

来源：评论

学校读者我要写书评

暂无评论

development and Prototyping of the DEPFET Active Pixel Detector (June 2013)

Development and Prototyping of the DEPFET Active Pixel Detec...

引用

3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their applications (ANIMMA)

作者： Scheirich, J. Charles Univ Prague Fac Math & Phys Inst Particle & Nucl Phys Prague 18000 Czech Republic

ISBN: (纸本)9781479910465;9781479910472

Active pixel sensor composed of DEPFETs (DEPleted Field Effect Transistors) array has been developed by DEPFET collaboration. The concept of DEPFET was proposed by Kemmer and Lutz in 1987 and today, it was developed into state-of-the-art highly granular, ultra-transparent monolithic pixel detectors for vertex reconstruction at future collider experiments. Excellent signal over noise performance is provided by integration of a MOSFET (Metal Oxide Semiconductor Transistor) in each pixel, which works as the first amplification stage of readout electronics. Thinning technologies make it possible to manufacture DEPFET sensors with thickness of active sensor area 50-75 micrometers. Steering ASICs (Application-Specific Integrated Circuits) as well as test systems were developed to characterize and optimize the DEPFET sensors. The DEPFET detector is being developed as a vertex detector at Belle ii experiment at the electron-positron SuperKEKB collider in Japan and the future International Linear Collider, but the concept of the DEPFET sensor offers also other fields of applications. In this paper the key parameters of the sensor design are presented, together with the individual ASICs. Furthermore, results of the prototypes tested using radioactive source, and laser are shown.

关键词： Front-end electronics for detector readout Detector alignment and calibration methods (lasers, sources, particle-beams) solid state detectors

来源：评论

学校读者我要写书评

暂无评论

Enhanced butanone chemoresistive sensor utilizing cobalt oxide nanoparticles

引用

CERAMICS INTERNATIONAL 2024年第15期50卷 27147-27153页

作者： Zito, Cecilia A. Theodoro, Reinaldo S. Perfecto, Tarcisio M. de Sa, Bruna S. Vioto, Gabriel C. N. Volanti, Diogo P. Sao Paulo State Univ Unesp Lab Mat Sustainabil LabMatSus Ibilce BR-15054000 S J Rio Preto SP Brazil Brazilian Corp Agr Res EMBRAPA BR-13560970 Sao Paulo Brazil Univ Hamburg Inst Nanostruct & Solid State Phys Ctr Hybrid Nanostruct CHyN Luruper Chaussee 149 D-22761 Hamburg Germany Brazilian Ctr Res Energy & Mat CNPEM Brazilian Nanotechnol Natl Lab BR-13083970 Campinas SP Brazil

Detection of volatile organic compounds (VOCs), particularly 2-butanone, has become crucial due to their widespread use and associated risks to human health. In this study, we present a novel synthesis method for spinel Co 3 O 4 nanoparticles (NPs) employing a microwave-assisted hydrothermal approach followed by calcination and investigate their efficiency in VOC sensing applications. The Co 3 O 4 NPs exhibit remarkable sensitivity and selectivity towards butanone at relatively low operating temperatures. VOC-sensing experiments reveal an optimal operating temperature of 250 degrees C , showcasing an advantage over existing sensors. Notably, the sensor exhibits high selectivity for butanone, with signal values 1.6 -4.5 times higher than those for other VOCs, including acetaldehyde, ethanol, isopropanol, methanol, acetone, m-xylene, toluene, and benzene. Additionally, the Co 3 O 4 NPs-based sensor demonstrates high sensitivity, detecting concentrations as low as 5 ppm of butanone, with fast response/recovery times of 41/86 s for 200 ppm of butanone and robust long-term stability. These findings underscore the potential of Co 3 O 4 NPs as promising candidates for low-temperature butanone detection, which is essential for environmental and human health monitoring purposes.

关键词： Methyl ethyl ketone Cobalt(ii iiI) oxide Gas sensor Low-temperature p-type

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：