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2007 IEEE 20th International Vacuum Nanoelectronics Conference最新文献

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Improving the electron emission properties of ion-beam-synthesized Ag-Si02 nanocomposites by pulsed laser annealing 采用脉冲激光退火技术改善离子束合成ag - sio2纳米复合材料的电子发射性能
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2008-04-01 DOI: 10.1116/1.2824970
W. Tsang, A. Adikaari, V. Stolojan, B. Sealy, S. Wong, S. Silva
{"title":"Improving the electron emission properties of ion-beam-synthesized Ag-Si02 nanocomposites by pulsed laser annealing","authors":"W. Tsang, A. Adikaari, V. Stolojan, B. Sealy, S. Wong, S. Silva","doi":"10.1116/1.2824970","DOIUrl":"https://doi.org/10.1116/1.2824970","url":null,"abstract":"In this work, pulsed laser annealing (PLA) was preformed on ion-beam-synthesized Ag-SiO2 nanocomposites to improve the FE properties of these samples by modifying the size and distribution of the Ag nanoclusters. The PLA was preformed using a 248 nm KrF excimer laser. Multiple pulses, with durations of 25 ns, at an energy density of 250 mJ/cm were accumulated onto the sample. The FE properties of the samples were studied in a high vacuum chamber, with a base pressure better than 5x10-4 Pa. The current-electric field (I-F) characteristics were measured using a \"sphere-to-plane\" electrode configuration, with a 5 mm diameter stainless-steel ball anode. The applied electric field was obtained by dividing the applied voltage by the gap distance and the threshold field (Fth) and is defined as the field strength when an emission current of 1 nA is achieved. The microstructure and the surface morphology of these samples are determined by the cross-section transmission electron microscopy (XTEM) and atomic force microscopy (AFM) measurements, respectively.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134236910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fabrication and emission characteristics from GaAs FEAs GaAs FEAs的制备及其发射特性
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4481012
Guimei Han, Y. Takigawa, Xin Liu, M. Shimomura, Y. Neo, H. Mimura
{"title":"Fabrication and emission characteristics from GaAs FEAs","authors":"Guimei Han, Y. Takigawa, Xin Liu, M. Shimomura, Y. Neo, H. Mimura","doi":"10.1109/IVNC.2007.4481012","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4481012","url":null,"abstract":"On the basis of previous research on optical modulation of Si FEAs, we present here, GaAs FEAs, their fabrication, experiment setup, and photo-response characteristics. Compare to silicon, GaAs is well known in optoelectronics, integrated optics, high frequency and ultra-fast electronic devices due to its high and direct band gap (1.41eV), and even fast electron mobility.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127495274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Implementation of x-ray energy detection and photon counting using a silicon field-emission imaging array 利用硅场发射成像阵列实现x射线能量探测和光子计数
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4480992
M. Wong, C. Hunt, Y. Diawara
{"title":"Implementation of x-ray energy detection and photon counting using a silicon field-emission imaging array","authors":"M. Wong, C. Hunt, Y. Diawara","doi":"10.1109/IVNC.2007.4480992","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4480992","url":null,"abstract":"A silicon field-emission array (FEA) was proposed for the implementation of x-ray energy detection and photon counting. The response of single X-ray photon events of differing X-ray energies is modeled showing two pulses with different widths and amplitudes. To verify the theory, a 2cm x 2cm silicon field emission array has been fabricated by subtractive etching and oxidation sharpening techniques. At 450 mum cathode to anode distance and at a vacuum level of 5x107 Torr, the device was biased at 1400V, field emitting at an integrated current of 32pA. When the device was excited by a 100muCi Fe55 X-ray source, an average increase of 24pA was observed.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126025670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design, fabrication and characterization of double-gated vertically aligned carbon nanofiber field emitter arrays 双门控垂直排列碳纳米纤维场发射阵列的设计、制造与表征
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4480942
L. Chen, L. Velásquez-García, X. Wang, K. Cheung, K. Teo, A. Akinwande
{"title":"Design, fabrication and characterization of double-gated vertically aligned carbon nanofiber field emitter arrays","authors":"L. Chen, L. Velásquez-García, X. Wang, K. Cheung, K. Teo, A. Akinwande","doi":"10.1109/IVNC.2007.4480942","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4480942","url":null,"abstract":"In this work, we designed and fabricated two types of double-gated isolated vertically aligned carbon nanofiber field emission arrays (VACNF FEAs) to study how the tip position relative to the gate affects the device performance. In the first type, the tip is in-plane with the gate, and in the second type, the tip is 0.9 mum below the gate. To quantify the effectiveness of the two gates to affect the total emission current, the gate field factor (betaG) and the focus field factor (betaF) are examined for both types of VACNF FEAs experimentally and by simulation.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123472599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
An improvement on cold carbon field electron emitter for a commercial x-ray tube 商用x射线管冷碳场电子发射器的改进
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1116/1.2839861
G.Y. Liu, Q. Lv, S. Xia, D. Wang, T.X. Li, H.Y. Li, Y. CDing, Z. Ju
{"title":"An improvement on cold carbon field electron emitter for a commercial x-ray tube","authors":"G.Y. Liu, Q. Lv, S. Xia, D. Wang, T.X. Li, H.Y. Li, Y. CDing, Z. Ju","doi":"10.1116/1.2839861","DOIUrl":"https://doi.org/10.1116/1.2839861","url":null,"abstract":"Recently the carbon field electron emitter, especially the carbon nanotube (CNT)/carbon nanofiber(CNF) emitter has been attracted great attentions for many researchers, due to their strong covalent bonding, much less sensitive to electromigration than metallic field emitter, be able to get high current, and can emit stable current even if , as one of the next generation vacuum X-ray tube's new cathode material, has also been attracted by a number of groups . Although the CNT/CNF cathode has unique properties for potential applications, but the preparation of matured and low-cost is still a topic that attracts much attention in vacuum devices area.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115577982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The synthesis and field emission property of carbon nanotubes on carbon fibers substrate 碳纤维衬底碳纳米管的合成及其场发射性能
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4480945
L. Zeng, Weibiao Wang, Jingqiu Liang, Y. Xia, D. Lei, Song Chen, Haifeng Zhao
{"title":"The synthesis and field emission property of carbon nanotubes on carbon fibers substrate","authors":"L. Zeng, Weibiao Wang, Jingqiu Liang, Y. Xia, D. Lei, Song Chen, Haifeng Zhao","doi":"10.1109/IVNC.2007.4480945","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4480945","url":null,"abstract":"Using ferrocene as catalyst precursor, C2H2 as carbon source, carbon nanotubes (CNTs) with uniform density were synthesized on carbon fibers substrate by floating catalyst method. The morphology and microstructure were characterized by field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscopy (HRTEM). The observation showed that the length of CNTs is about 2 m, the average space between adjacent CNTs is about 300 nm and the diameter of CNT is about 45 nm. The less dense \"short and stubby\" aligned CNTs films should have good electron field emission characteristics. The CNTs synthesized on carbon fibers substrate has many predominances for the fabrication of cold cathode devices. Therefore, CNTs/carbon fibers may have potential application in field emission displays.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114190059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Field emission from nanomechanically modulated electron islands 纳米机械调制电子岛的场发射
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4480949
H. Kim, H. Qin, R. Blick
{"title":"Field emission from nanomechanically modulated electron islands","authors":"H. Kim, H. Qin, R. Blick","doi":"10.1109/IVNC.2007.4480949","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4480949","url":null,"abstract":"Here we discuss a new approach in which the high frequency modulation is realized by ultrasonic mechanical modulation of an array of emitting pillars. The potential advantages of this concept include: (1) preserving the advantages of field emission such as room temperature operation and direct current modulation at the cathode, (2) reducing arc vulnerability by eliminating the need for a large voltage difference between the emitter tip and a nearby (gate) electrode, (3) scale-up potential to large area cathodes, (4) opportunity for significantly enhancing the emission current by phonon-assisted tunneling, and (5) opportunity for ultra-low noise operation, enabling a new class of ultra-low noise TWT amplifiers. Functioning of the devices is demonstrated for a single nanomechanical pillar. Mechanically modulated field emission is probed.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123502476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
XPS and LEED analyses on the extremely low work function surface of W(100) modified by yttrium oxide. 氧化钇改性W(100)极低功函数表面的XPS和LEED分析。
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4480915
T. Kawakubo, Y. Shimoyama, H. Nakane, H. Adachi
{"title":"XPS and LEED analyses on the extremely low work function surface of W(100) modified by yttrium oxide.","authors":"T. Kawakubo, Y. Shimoyama, H. Nakane, H. Adachi","doi":"10.1109/IVNC.2007.4480915","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4480915","url":null,"abstract":"XPS and LEED analyses have been done for tungsten (100) surface modified by use of Y2O3. No shift in Y-3d XPS peak is observed for heat treatment, suggesting that Y-O composite cannot be expected, in contrast to the case of ZrO/W(100) surface for which Zr-O composite is believed to exist. The particular LEED pattern is also different with each other: p(2X1) double domain pattern for YO/W(100) and c(4X2) double domain pattern for ZrO/W(100).","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"2019 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121414496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An injection locked millimeter wave oscillator based on field emission cathodes 一种基于场发射阴极的注入锁定毫米波振荡器
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1116/1.2897324
P. Lu, Ming-Chieh Lin
{"title":"An injection locked millimeter wave oscillator based on field emission cathodes","authors":"P. Lu, Ming-Chieh Lin","doi":"10.1116/1.2897324","DOIUrl":"https://doi.org/10.1116/1.2897324","url":null,"abstract":"The frequency range of the millimeter wave is from 30 up to 300 GHz. Millimeter waves have been extensively studied for many applications including high resolution radars, communications, materials processing, plasma heating, high energy particle accelerators and power transmission. In this paper, an injection-locked millimeter wave oscillator based on field-emission cathodes is proposed and demonstrated the well phase/frequency controllability. The simulation results are consistent with the prediction of Adler's equation. The preliminary results show that the design of the injection-locked oscillator seems to promise useful and compact millimeter wave sources.","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114329095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Direct growth of carbon nanotubes on a conical tip as a micro-focused x-ray generation source: Effects of various composition ratios of co-sputtered Ni and Co catalysts 作为微聚焦x射线源的碳纳米管在锥形尖上的直接生长:不同共溅射Ni和Co催化剂组成比例的影响
2007 IEEE 20th International Vacuum Nanoelectronics Conference Pub Date : 2007-07-08 DOI: 10.1109/IVNC.2007.4480987
Jong-pil Kim, Chang-kyun Park, S. Yun, W. Kim, Young-Kwang Kim, Jin-Seok Park
{"title":"Direct growth of carbon nanotubes on a conical tip as a micro-focused x-ray generation source: Effects of various composition ratios of co-sputtered Ni and Co catalysts","authors":"Jong-pil Kim, Chang-kyun Park, S. Yun, W. Kim, Young-Kwang Kim, Jin-Seok Park","doi":"10.1109/IVNC.2007.4480987","DOIUrl":"https://doi.org/10.1109/IVNC.2007.4480987","url":null,"abstract":"In this study, we first present the experimental results that regard the direct growth of CNTs on a conical-type tungsten (W) tip and their electron emission properties, in terms of the catalyst materials such as a nickel (Ni) and a cobalt (Co) as well as their composition ratios. Sharpening of W-tips was done by electrochemical etch and their diameters were controlled to range from 5 mum down to sub-mum. The co-sputtering method using Ni and Co targets was used to deposit the catalyst layers with various composition ratios of Ni and Co metals. The composition ratio of the co-sputtered catalysts was evaluated by using an energy dispersive X-ray spectroscopy (EDS, Oxford). CNTs were grown by inductively coupled plasma-chemical vapor deposition (ICP-CVD).","PeriodicalId":281199,"journal":{"name":"2007 IEEE 20th International Vacuum Nanoelectronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133889166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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