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Autor: Grafiati

Data publikacji: 23 listopada 2024

Data aktualizacji: 31 lipca 2025

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1

Sanborn, Graham Patrick. "A thin film triode type carbon nanotube field electron emission cathode." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50302.

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The current technological age is embodied by a constant push for increased performance and efficiency of electronic devices. This push is particularly observable for technologies that comprise free electron sources, which are used in various technologies including electronic displays, x-ray sources, telecommunication equipment, and spacecraft propulsion. Performance of these systems can be increased by reducing weight and power consumption, but is often limited by a bulky electron source with a high energy demand. Carbon nanotubes (CNTs) show favorable properties for field electron emission (

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2

Ludwick, Jonathan. "Physics of High-Power Vacuum Electronic Systems Based on Carbon Nanotube Fiber Field Emitters." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613745398331048.

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Kong, Xiangliang, Fan Guo, Joe Giacalone, Hui Li, and Yao Chen. "The Acceleration of High-energy Protons at Coronal Shocks: The Effect of Large-scale Streamer-like Magnetic Field Structures." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626416.

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Recent observations have shown that coronal shocks driven by coronal mass ejections can develop and accelerate particles within several solar radii in large solar energetic particle (SEP) events. Motivated by this, we present an SEP acceleration study that including the process in which a fast shock propagates through a streamer-like magnetic field with both closed and open field lines in the low corona region. The acceleration of protons is modeled by numerically solving the Parker transport equation with spatial diffusion both along and across the magnetic field. We show that particles can b

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West, Ryan Matthew. "Work function fluctuation analysis of polyaniline films." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47586.

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In this thesis, the development of a novel experimental technique for measuring the spontaneous, stochastic work function (WF) fluctuations of conducting polymer films, at equilibrium, is discussed. Polyaniline (PANI) is studied as a representative conducting polymer. This technique utilizes an insulated-gate field-effect transistor (IGFET) with PANI gate electrode (PANI-IGFET). The fluctuations of PANI WF are transduced into measurable drain current fluctuations of the device. By analyzing these fluctuations while systematically controlling the temperature, electric field and doping level, a

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5

Seidemann, Johanna. "Iontronic - Étude de dispositifs à effet de champ à base des techniques de grilles liquides ioniques." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY075/document.

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Les liquides ioniques sont des fluides non volatiles, constitués de cations et d’anions, qui sont conducteurs ioniques, isolants électriques, et peuvent avoir des valeurs de capacité très élevées. Ces liquides sont susceptibles non seulement de remplacer les électrolytes solides, mais également de susciter des champs électriques intenses (>SI{10}{megavoltpercentimetre}) au sein d’une couche dite double couche électronique (electric double layer, EDL) à l’interface entre le liquide et le matériau sur lequel il est déposé. Ceci conduit à une injection de porteurs de charge bidimensionelle ave

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6

Quentin-Schindler, Marie. "Étude et développement d’une source d’ions équipée d’une cathode à nanotubes de carbone, émettrice d’électrons par effet de champ avec une application aux tubes neutroniques scellés." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS251.

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Ce projet de thèse, réalisé au sein de Sodern, filiale d'ArianeGroup, est dédié à l'optimisation des tubes neutroniques scellés. Ces dispositifs sont utilisés pour l'analyse de matière, principalement dans les secteurs pétrolier et minier. Ils fonctionnent sur le principe des accélérateurs de particules miniaturisés, générant des neutrons par la réaction de fusion deutérium-tritium.La problématique centrale de cette recherche concerne la source d'ions des tubes, actuellement reposant sur une cathode froide de type Penning. Cette configuration présente des limitations significatives, telles qu'

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Cooper, Joseph Andrew. "Investigation of the effects of process variables on the properties of europium-doped yttrium oxide phosphor." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/20503.

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8

Andrew), Patterson Alex A. (Alex. "An analytical framework for field electron emission, incorporating quantum- confinement effects." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84863.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 141-151).<br>As field electron emitters shrink to nanoscale dimensions, the effects of quantum confinement of the electron supply and electric field enhancement at the emitter tip play a significant role in determining the emitted current density (ECD). Consequently, the Fowler-Nordheim (FN) equation, which primarily applies to field emission from the planar surface of a bulk metal may not be val

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9

Mo, Yudong. "The Effects of Residual Gases on the Field Emission Properties of ZnO, GaN, ZnS Nanostructures, and the Effects of Light on the Resistivity of Graphene." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500202/.

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In this dissertation, I present that at a vacuum of 3×10-7 Torr, residual O2, CO2, H2 and Ar exposure do not significantly degrade the field emission (FE) properties of ZnO nanorods, but N2 exposure significantly does. I propose that this could be due to the dissociation of N2 into atomic nitrogen species and the reaction of such species with ZnO. I also present the effects of O2, CO2, H2O, N2, H2, and Ar residual gas exposure on the FE properties of GaN and ZnS nanostructure. A brief review of growth of ZnO, GaN and ZnS is provided. In addition, Cs deposition on GaN nanostructures at ultra-hi

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10

Narayanan, Sruthi Annapoorny. "Effect of magnetic seed fields on Lyman Alpha emission from distant quasars." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105651.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 55-57).<br>There are indications that weak magnetic fields originating in the early Universe and magnified via magnetohydrodynamic (MHD) processes could cause perturbations in the thermodynamic state of the gas in the intergalactic medium which affect the Lyman-Alpha spectrum we observe. In this work we investigate to what extent the properties of the Lyman-Alpha forest are sensitive to the presence of large-scale cosmological

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11

Lewis, Richard Henry. "The reproducibility of field measurements and the effect of wind speed on the sampling of airborne dust." Thesis, University of Salford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335409.

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12

Wadhawan, Atul. "The Effects of Cesium Deposition and Gas Exposure on the Field Emission Properties of Single Wall and Multiwall Carbon Nanotubes." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3110/.

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The effects of Cs deposition on the field emission (FE) properties of single-walled carbon nanotube (SWNT) bundles were studied. In addition, a comparative study was made on the effects of O2, Ar and H2 gases on the field emission properties of SWNT bundles and multiwall carbon nanotubes (MWNTs). We observed that Cs deposition decreases the turn-on field for FE by a factor of 2.1 - 2.9 and increases the FE current by 6 orders of magnitude. After Cs deposition, the FE current versus voltage (I-V) curves showed non-Fowler-Nordheim behavior at large currents consistent with tunneling from adso

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13

Burdette, Don Joesph. "A Study of the Effects of Strong Magnetic Fields on the Image Resolution of PET Scanners." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1245095497.

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Jermain, Robert F. "Effects of EMF Emissions from Undersea Electric Cables on Coral Reef Fishes." NSUWorks, 2016. http://nsuworks.nova.edu/occ_stuetd/418.

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The objective of this project was to determine if the electromagnetic field (EMF) emissions from undersea power cables impacted the local and transient marine life, with an emphasis on reef fishes. The work was done at South Florida Ocean Measurement Facility of Naval Surface Warfare Center, Carderock Division, Broward County, Florida. This facility functions as the hub for a range of active undersea detection and data transmission cables. It has multiple active submarine power cables that extend several miles offshore and which can deliver power and enable data transmission to and from a rang

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15

Van, Zandvoort Alisha. "The Effect of Control Tile Drainage on Soil Greenhouse Gas Emissions from Agricultural Fields in the South Nation Watershed of Ontario." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34567.

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Controlled tile drainage (CTD) is an agricultural management practice with well-documented water quality and agronomic benefits, however, by virtue of its effect upon soil hydrology, CTD could potentially impact soil greenhouse gas (GHG: CO2, CH4, N2O) emissions. This study aimed to determine whether: (1) CTD affects soil GHG emissions throughout a dry (2012) and a wet (2013) growing season for corn, soybean, and forage fields in eastern Ontario, and (2) the location in a field with respect to a tile drain (over tile (OT) versus between tile (BT)) is important in GHG emissions. Non-steady stat

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16

Bertram, Janet. "Effects of cow urine and its constituents on soil microbial populations and nitrous oxide emissions." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1334.

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New Zealand’s 5.3 million strong dairy herd returns approximately 106 million litres of urine to pasture soils daily. The urea in that urine is rapidly hydrolysed to ammonium (NH₄⁺), which is then nitrified, with denitrification of nitrate (NO₃⁻) ensuing. Nitrous oxide (N₂O), a potent greenhouse gas (GHG), is produced via nitrification and denitrification, which are enzyme-catalysed processes mediated by soil microbes. Thus microbes are linked intrinsically to urine patch chemistry. However, few previous studies have investigated microbial dynamics in urine patches. Therefore the objective of

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17

Constancias, Christophe. "Emission d'électrons par effet de champ à partir de micropointes pour écrans plats : simulations, caractérisations et confrontations expérimentales." Université Joseph Fourier (Grenoble ; 1971-2015), 1998. http://www.theses.fr/1998GRE10002.

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Les feds (field emission displays) utilisent des millions de microcanons a electrons : les micropointes. L'uniformite et la stabilite de ces micropointes sont des qualites indispensables pour la fabrication optimisee des emetteurs et la performance des feds. L'objectif de cette etude est d'evaluer precisement les proprietes emissives de cathodes a micropointes fabriquees pour les ecrans plats. Il s'agit de correler les modeles developpes a partir de la simulation de micropointes avec les caracteristiques experimentales observees sur ces memes micropointes. Le travail est scinde en trois partie

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18

Borz, Mario. "Propriétés d'émission et de conduction de nano-pointes de diamant sous éclairement laser ultra-bref : Etude par microscopies à effet de champ et spectroscopie en énergie." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR117.

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Le but de cette thèse est de comprendre les changements dans les propriétés électriques et optiques des matériaux à large bande interdite à l'échelle nanométrique par rapport au matériau massif et en présence d'un champ électrique statique intense. Le diamant en forme de nano-aiguille a été choisi comme matériau d'étude en raison de sa large bande interdite, sa haute résistance aux contraintes externes et sa conduction thermique élevée. Le diamant présente également une résistance électrique élevée, ce qui en fait un bon candidat pour l'étude des modifications de conduction électrique sous des

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19

Py, Christophe. "Construction d'un interféromètre électronique pour l'étude des propriétés émissives de micropointes à effet de champ : diffraction et interférences d'électrons lents." Grenoble 1, 1993. http://www.theses.fr/1993GRE10176.

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La substitution des filaments chauffants par des micropointes a effet de champ comporte des avantages dans plusieurs applications d'electronique: le leti a deja prouve l'interet de ce principe pour les ecrans plats; de nombreuses personnes croient que les micropointes pourraient fournir des sources micro-ondes innovantes. De plus, les proprietes de l'emission permettent d'aller plus loin en envisageant des applications d'optique electronique que n'etaient pas possible avec les filaments chauffants. En vue d'evaluer les potentialites des micropointes fabriquees au leti pour de telles applicatio

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20

Mohamed, Sherif. "Carrier Dynamics in InGaN/GaN Semipolar and Nonpolar Quantum Wells." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177906.

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InGaN based light emitting devices operating in the blue and near UV spectral regions are commercialized and used in many applications. InGaN heterostructures experience compositional inhomogeneity and thus potential fluctuations, such that regions of higher indium composition are formed and correspond to lower potentials. The indium rich regions form localization centers that save carriers from non-radiative recombination at dislocations, thus despite the large defect density, their quantum efficiency are surprisingly large. However, the conventional c-plane InGaN QWs suffer from high interna

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CAVALIERI, TASSIO A. "Emprego do NCNP no estudo dos TLDs 600 e 700 visando a implementação da caracterização do feixe de irradiação na instalação de BNCT do IEA-R1." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10565.

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Made available in DSpace on 2014-10-09T12:42:01Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:33Z (GMT). No. of bitstreams: 1 19174.pdf: 31751 bytes, checksum: 7f1e1ac2bd5fcea7b8edbb1e6ba7a12b (MD5)<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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22

Hajlaoui, Riadh. "Effet de la structure sur les propriétés électriques et optiques d'oligomères conjugués semi-conducteurs. Application à la réalisation de transistors à effet de champ et de diode électroluminescentes." Rouen, 1995. http://www.theses.fr/1995ROUES005.

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L'étude structurale des polymères conjugués montre que leur désordre moléculaire et structural limite la qualité de leurs propriétés électroniques, et restreint donc leur éventuelle application à des composants électroniques. L'utilisation de systèmes moléculaires structuralement bien définis devrait par contre permettre de s'affranchir de ces défauts chimiques et physiques, et d'améliorer ainsi l'efficacité du transport de charges dans ces matériaux semi-conducteurs. Cette démarche est illustrée ici par l'étude du sexithiophène (6T) et de ses dérivés substitués. La première partie est consacr

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23

Nunes, Neto Oswaldo [UNESP]. "Estudo dos processos de transporte dependentes de Spin em materiais orgânicos." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143066.

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Submitted by OSWALDO NUNES NETO null (netfisic@fc.unesp.br) on 2016-08-13T20:37:55Z No. of bitstreams: 1 Tese_Doutorado_Oswaldo.pdf: 4276326 bytes, checksum: e73a2086ffde0d12d2f5875fb168f8c1 (MD5)<br>Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-08-16T14:27:21Z (GMT) No. of bitstreams: 1 nunesneto_o_dr_bauru.pdf: 4276326 bytes, checksum: e73a2086ffde0d12d2f5875fb168f8c1 (MD5)<br>Made available in DSpace on 2016-08-16T14:27:21Z (GMT). No. of bitstreams: 1 nunesneto_o_dr_bauru.pdf: 4276326 bytes, checksum: e73a2086ffde0d12d2f5875fb168f8c1 (MD5)

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Ford, Colleen D. "The fate of nitrogen in lactose-depleted dairy factory effluent irrigated onto land." Lincoln University, 2008. http://hdl.handle.net/10182/837.

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A two-year lysimeter study was undertaken to compare the environmental effects (e.g. nitrate leaching and nitrous oxide emissions) of soil applied lactose-depleted dairy factory effluent (LD-DFE) with lactose-rich DFE. The aim of this experiment was to determine the fate of nitrogen from LD-DFE and dairy cow urine applied to a Templeton fine sandy loam soil (Udic Ustrochrept), supporting a herbage cover of ryegrass (Lolium perenne) and white clover (Trifolium repens). Measurements were carried out on the amount of nitrogen lost from the soil via leaching, lost by denitrification, removed by th

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25

Zheng-DongLin and 林正東. "Fabrication of CNTs-based Gas Sensor, Field Emission, and Field-effect Transistor." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/3z3383.

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博士<br>國立成功大學<br>微電子工程研究所<br>104<br>In this study, the growth of high-density multi-wall nanotubes (MWNTs) on oxidized Si substrate was investigated. The obtained average length and diameter of the CNTs were approximately 4.52 and 45 nm, respectively. The adsorption of metal nanoparticle on nanotube surfaces and the fabrication of MWNT-based gas sensors were also examined. Ag adsorption to the MWNTs significantly increased device sensitivity and provided a 5.31% increase in RT sensitivity over that of MWNTs for an ambient isopropyl alcohol gas concentration of 800 ppm. The response speed and st

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Tsai, Meng-Hsien, and 蔡孟弦. "The effect of field emission on CNTs for N2 detection." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/60666085232661592877.

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碩士<br>國立雲林科技大學<br>電子與資訊工程研究所<br>94<br>Since their discovery in 1991, carbon nanotubes (CNTs) have been the most promising material due to their unique structure and properties. These unique properties of CNTs make them as field emission devices, tips for scanning probe microscopes, hydrogen storage, quantum wires, and gas sensor. The growth of vertically aligned carbon nanotubes was carried out by using thermal chemical vapor deposition (thermal CVD) system. Prior to CNTs growth, a 20 nm Fe thin film acting as catalyst was deposited on (100) p-type silicon substrate by Radio Frequency (RF

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27

Chang, Di-Jie, and 張迪傑. "Study of Temperature Effect on Field Emission Characteristics of Carbon Nanotubes." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/zfuw3n.

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碩士<br>國立臺灣科技大學<br>材料科技研究所<br>94<br>In our investigation, we used methane as carbon source and used Plasma enhanced chemical vapor deposition (PECVD) to grow carbon nanotubes on substrate which had been coated with iron as catalyst. We fabricated carbon nanotubes (CNTs) that owned different surface morphology, different length and different density. And we investigate the field emission characteristics of the CNTs at varied temperature of these samples. Most samples which had better emission properties (lower turn on field) showed temperature independence in whole applied field range. But samp

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28

Tai, Su, and 蘇泰. "A numerical simulation for a gated field emission triode considering temperature effect." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/71255991839973512206.

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碩士<br>國立交通大學<br>電子研究所<br>81<br>Presented here is a new numerical siumlation tool for gated field emission triode(GFET) considering space charge effect and temperature effect. The mesh structure used in our simulation tool is very flexible, about 1 A near the tip and 1 um near anode. This kind of mesh structure can be used to accurately estimat the field at tip peak without using field enhancement factor and the CPU time is greatly reduced. In addition, the imporant of the number of meshes i

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Weng, Ting-Wei, and 翁廷維. "Area Effect of Patterned Carbon Nanotube Bundle on Electron Field Emission Characteristics." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47921547387005309996.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>95<br>Patterned carbon nanotube (CNT) bundles were fabricated using the thermal chemical vapor deposition (CVD) method. The catalyst metal layer and buffer layer were Fe and Al, respectively, for CNT bundle growth. The optimal growth conditions were found to be Fe (3 nm), Al (5 nm), annealing for 1 hr and C2H2 flowing at 750℃. Patterns of different diameters and distances were defined on Si (100) substrates using photolithography. Bundle height was controlled using different hydrocarbon flow times. The inter-bundle distance to bundle height ratio was maintained at 2,

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SHARMA, ANAND. "FIELD EMISSION OF ELECTRONS FROM HEMISPHERICAL CONDUCTING CARBON NANOTUBE TIP INCLUDING THE EFFECT OF IMAGE FORCE." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14632.

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ABSTRACT The present work examines the field emission from Conducting Hemispherical Carbon Nanotune (CNT) tip including the Effect of Image Force. An expression for electrostatic potential for a Hemispherical CNT tip at a distance from the centre of CNT has been derived. Using the time-independent Schrodinger equation corresponding expressions for transmission coefficient and field emission current density have been derived for the Hemispherical Conducting Carbon Nanotubes. The numerical calculations of potential, transmission coefficient and the current density function have been calculated

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Hung, Wei-Ren, and 洪違仁. "The Effect of Plasma Treatments on the Field Emission Characteristics of SiOx Nanowires." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/23003781978011278812.

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碩士<br>大葉大學<br>電機工程學系<br>96<br>In this work, a layer of nickel was evaporated onto a (100) silicon substrate to induce the precipitation of silicon at 1000°C for 2 hours in order to grow SiOx nanowires. The thickness of nickel layer was varied to study its effects on the field emission characteristics of SiOx nanowires. As observed from SEM graphs, the average diameter of SiOx nanowires varies almost linearly with the thickness of catalyst Ni layer. It can be concluded that thicker Ni layer produces lager and fewer catalyst balls in the nucleation stage resulting in larger and fewer SiOx nanowi

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陳怡伶. "The Effect on Field Emission Characteristic of Carbon Nanotubes Coated by Boron Nitride Film." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/41024526219809707215.

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碩士<br>國立清華大學<br>工程與系統科學系<br>94<br>This thesis investigates the field emission characteristic of periodic arrays of vertically aligned isolated carbon nanotubes (CNTs) coated by boron nitride (BN) using magnetron sputtering method and plasma-assisted chemical vapor deposition method. It has been reported that BN film could be one of the promising materials for field emitter because of its negative electron affinity (NEA) at the surface. In addition to its high aspect ratio, the field emission characteristics of CNTs have been widely studied due to its chemically and mechanically robust properti

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Lo, Shao-kang, and 羅紹剛. "Effect of Pretreatment Methods on the Electron Field Emission Characteristics of the Diamond Films." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8m4vv7.

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碩士<br>大同大學<br>電機工程學系(所)<br>107<br>In this study, firstly we use the spin-coating to spin the mixture of different diamond Ti and titanium powders on the Si substrates, and then the samples were annealed by furnace tube.The results show that the samples compsed of black boron diamond (BBD) and μm-sized Ti powders possess the highest conductivity with the turn-on field of 3.2 V/μm and current density of 808.46 μA/cm2 when the applied field was fixed at 8V/μm. In the second part of the thesis, the samples annealed after the furnace annealing were processed by plasma post-treatment, we use three

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Jana, Amit Kumar. "Effects of viscocity variation and very high permittivity on the magnetic field effect in pyrene- dimethyl aniline exciplex emission." Thesis, 2014. http://hdl.handle.net/10821/8195.

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Magnetic field induced change in the pyrene-N,N-dimethylaniline exciplex fluorescence has been studied in condensed phase with very high permittivity. In contrast to the commonly observed enhancement of exciplex fluorescence in presence of magnetic field (solvent dielectric constant ranging between 7 to 33), the effect shows a complete reversal at low DMA concentration in dimethyl sulfoxide (DMSO) which is observed only at the blue end of fluorescence. At high DMA concentration the negative MFE at blue end slowly reverts back to the normal. At the red end of the emission the MFE retains its no

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TsaiMing-che and 蔡銘哲. "Effect of alloy catalyst on the growing characters of CNT and its field emission properties." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47472912365598774275.

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碩士<br>崑山科技大學<br>電子工程研究所<br>95<br>The iron, cobalt and nickel are three kinds of element most used as catalyst to grow CNT. However the research report pointed out that, the alloy catalyst which contains two different kinds of element has special effect on controlling CNT growth and caliber. The present research mainly uses RF Magnetron sputtering system to prepare the metal catalysts. The metal catalyst used in this study is nickel metal doped with different percent of iron metal and annealed to become a Ni-Fe alloy catalyst. By changing the composition of alloy catalyst, the growth of CNT and

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Teng, Kuang-Yau, and 鄧光佑. "The study on the effect of graphitization processon the electron field emission propertiesof diamond films." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/46788371424000629124.

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博士<br>淡江大學<br>物理學系博士班<br>100<br>In this thesis, we used 3 examples to demonstrate the effect of graphitization process on enhancing the electron field emission (EFE) properties of diamond films, viz. (i) high energy ion irradiation, (ii) ultrasonication-bias enhanced growth (U-BEG) process and (iii) N2-plasma MPECVD process. (i) In the high energy ion irradiation effect process, we observed that irradiation of 2.245 GeV Au-ions imposed significant modification on the granular structure of MCD diamond films but induced less marked influence on the microstructure of UNCD films. The extent of mod

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Lu, Shan-Jen, and 盧宣任. "The effect of field emission traits of carbon-nanotubes on the generation of negative air ions." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/38403545768069636163.

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碩士<br>國立臺灣大學<br>環境工程學研究所<br>97<br>This study investigated the traits of field emission effect of carbon-nanotubes (CNTs) on generation of negative air ions (NAIs) by negative electric discharging, and the feasibility of developing a microscale air cleaner. The research evaluated the effect of the aspect ratio of CNTs, density of the CNTs, single-wall and multi-wall CNTs and double-wall CNTs, metal material, metal aspect ratio, and metal needle-point curvature on the discharging voltage of CNTs. It also evaluated the stability and the effective space of the generation of NAIs by using CNTs with

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Yang, Ming-Xun, and 楊銘勳. "Simulation Study of Junction Effect on Field Emission from One-dimensional Nanostructure Grown on Silicon Substrate." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/64466520859316879726.

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碩士<br>國立成功大學<br>光電科學與工程研究所<br>94<br>Field emission display takes an important role in recent display technology. In this present study, junction effect on field emission from one-dimensional nanostructure grown on silicon substrate has been investigated by computer simulation. The classical transport equation is used to describe the carrier transportation in the material. The field emission at the emitter-vacuum interface is modeled by the Fowler-Nordheim equation. First, we discuss the field emission properties of the one-dimensional nanostructure grown on doped silicon substrate. The result

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Hsu, Jen-Hao, and 許仁豪. "Effect of underlying metals and emitter patterns on the field emission properties of CNT diode devices." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/92739368315904563539.

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碩士<br>國立嘉義大學<br>光電暨固態電子研究所<br>94<br>The present paper mainly was used the microwave plasma enhanced-chemical vapor deposition(MP-CVD) growing carbon nanotube (CNTs) by (Ni) the array (10μm x 10μm) and different spaces (20μm、15μm、10μm、5μm) with four different metals (TiN，Ti，Ta) to be the barrier layer。 The advantage used MP-CVD in the catalyzed metal (Ni) the array to grow the high density and vertically aligned CNTs。Then changed diverse parameters to grow CNTs and compared field emission characteristic by penetration vacuum electric properties measurement system measured field emission propert

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Hsieh, Yun-Shuo, and 謝昀朔. "Study of thermal and optical effect on electron field emission properties of carbon nanotubes for emitter applications." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/65738971924391704277.

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碩士<br>國立臺灣師範大學<br>物理研究所<br>91<br>In this thesis, the microwave plasma enhanced chemical vapor deposition method was used to synthesize carbon nanotubes on the tip of iron needle. The morphology of the carbon nanotubes changed with the gas species and the diameters of the carbon nanotubes increased with the gas pressure in the chamber. The organic iron catalysts precoated on the tip pronouncedly improved the carbon nanotubes grow uniformity. Moreover, carbon nanotubes were synthesized by using graphite powder and diamond powder as the carbon sources. Optical emission spectra of the

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Huang, Yu-Hsuan, and 黃裕軒. "Effect of Field Emission Characteristics of Al and Mn-doped ZnO Nanorod Arrays Grown by Chemical Bath Deposition." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/00774803886589834295.

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碩士<br>國立聯合大學<br>電子工程學系碩士班<br>103<br>ZnO, Al-doped ZnO and Mn-doped ZnO nanorod arrays were prepared on the ITO substrate by low-temperature chemical bath deposition (CBD) method. The effects of dopants (Al or Mn) and doping concentrations (1~3 mol%) on the structural and field emission properties were investigated in this work. SEM results show that the 3 mol% Al or Mn doping ZnO nanorods have length increased from 1.05 nm to 1.58 nm and 1.01 nm, respectively. Meanwhile, the diameter of the ZnO nanorods is significantly increased. XRD analysis shows that the Al-doped and Mn-doped ZnO nanorods

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Chien-Kang, Kao, and 高建綱. "Effect of Plasma-to-film Interaction on Electron Field Emission Properties of Pulsed Laser Doposited Diamond-like Carbon Films." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/96846220484045811041.

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碩士<br>中原大學<br>應用物理研究所<br>86<br>We synthesize the diamond-like carbon(DLC) films using pulsed laser deposition(PLD) process. And then post-treat the films using plasma, which is induced by radio frequency(RF). We are going to examine the effect of the plasma-to-film interaction on the physical and electrical properties of the DLC films. The characteristics of plasma; which includes Ar, N_2 or O_2 species, will be systematically varied in order to further understand their influence on electronfield emission. It is known that pulsed laser deposited DLC films contain high sp^3/sp^2 ratio, which s

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Wang, Jiun-Yu, and 王俊喻. "Size effect on Field Emission properties of Si nanowires arrays and electronic properties of Ni-Silicide/Si heterostructure nanowires." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/44674757409904380085.

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碩士<br>國立中興大學<br>材料科學與工程學系所<br>100<br>Nanoscale Schottky contact used for diodes, Schottky barrier field effect transistors and solar cells have been extensively studied. The Schottky metal silicide/Si heterojunctions in nanostructures have been widely investigated due to their applicability to Si-based devices. The free-standing Si NW arrays have been fabricated by the combining nanosphere lithography with metal-assisted catalytic etching. Further, chemical etching using a KOH solution was performed for adjusting the diameter of nanowires. Then, nickel silicide/Si heterostructure nanowires w

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Huang, Pin-Sang, and 黃品森. "Resistance effect on Field Emission for One-dimensional Nanostructures Grown on Silicon Substrates：A Simulation Study Using Classical Transport Model." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/15018448653138676751.

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碩士<br>國立成功大學<br>光電科學與工程研究所<br>95<br>The Fowler-Nordheim (F-N) plots of the carbon nanotubes (CNTs) often exhibit a saturation-like phenomenon in the high-voltage region. This phenomenon is attributable to the resistance effect of the CNTs and/ or the interface effect between the substrate and CNTs. Jo et al. established a modified F-N equation to take the resistance effect into account. And their model can fit the experiment data well by adjusting the bulk resistance of the CNTs [52]. In this study, the carrier transport model is applied to investigate the resistance effect of the 1-D nan

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Liao, Mei-Chih, and 廖美枝. "The Effects on Field Emission Properties of CNTs by PIII." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/32423124414061481551.

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Lu, Duan Shao, and 盧端劭. "The effects of CNT graphitization on the field emission characterictics." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/76027330436978370735.

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碩士<br>國立中興大學<br>電機工程學系<br>92<br>In this research, the carbon nano tubes (CNTs) are grown by controlling methane flow, plasma power and nitrogen flow. The Raman spectrum is measured to analyze the relative concentration of diamond structure (D-band) and graphite structure (G-band). The growth rate of CNTs increases as the methane flow rate increase, however, the properties of CNT is not as good as that grown by lower flow rate. The tubes are twisty, some carbon black spots are observed in CNTs. The growth rate of CNTs becomes slow when nitrogen is mixed to dilute the reactant, but on the other

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Guettler, Barbara Elisabeth. "Effect of Thermal and Chemical Treatment of Soy Flour on Soy-Polypropylene Composite Properties." Thesis, 2012. http://hdl.handle.net/10012/6702.

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Soy flour (SF), a by-product of the soybean oil extraction processing, was investigated for its application in soy-polypropylene composites for interior automotive applications. The emphasis of this work was the understanding of this new type of filler material and the contribution of its major constituents to its thermal stability and impact properties. For this reason, reference materials were selected to represent the protein (soy protein isolate (SPI)) and carbohydrate (soy hulls (SH)) constituents of the soy flour. Additional materials were also investigated: the residue obtained after th

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Nnadili, Miriam Nchekwubechukwn. "Effect of relative humidity on chemical off-gassing in residences." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3384.

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Relative humidity (RH) is an important parameter associated with occupant comfort in buildings. However, the effects of RH on indoor source off-gassing and interactions between air pollutants and indoor materials are poorly understood. For this study, air samples were collected in residential buildings to characterize “background” concentrations of volatile organic compounds (VOCs) in air. The interior space was then humidified for several hours prior to collection of another air sample to characterize the effects of increased RH on VOC concentrations. Samples were analyzed by GC/FID with ab

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Yeh, Chih-Cheng, and 葉致成. "Screening Effects Study on Field Emission Characteristics of Diamond Nano-tip Array." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/24717835658730075248.

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碩士<br>國立清華大學<br>動力機械工程學系<br>98<br>Screening effect of field emission on the diamond nano-tip array with different pitches is investigated. The diamond nano-tip arrays are formed by hot-filament chemical vapor deposition (HFCVD) on aluminum oxide (AAO) template. The AAO template is fabricated by hard anodization. Compared with moderate anodization, there are many advantages for using hard anodization, such as fast growing and high regularity. The nano diamond particles are adhered onto the AAO template by Polyethylenimine pretreatment to increase the nucleation density of diamond. The diamond f

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Chang, Ling-Ko, and 張綾珂. "Effects of silver content in MWNT paste on the field emission properties." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/9g58c8.

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碩士<br>國立臺北科技大學<br>材料科學與工程研究所<br>95<br>In this work, effects of silver content in multi-walled carbon nanotubes （MWNTs）paste on the field emission properties were investigated for the application of carbon nanotube field emission display （CNT-FED）cathode. The diode cathode structures were fabricated by thick-film screen-printing technology, and TGA analysis was used to study relationship between CNT and silver during sintering process. By using adhesive tape to activate emitter surface, most of the carbon nanotubes （CNTs）can be aligned vertically. By constant-current measuring method, emission

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