... thin films, as well [26] Among metaloxide semiconductors, tungsten oxide is a promising material for gas sensing Several studies have shown that it can be used for the detection of nitrogen oxide ... special regime of thin film deposition by dc magnetron, ion-beam or rf sputtering from metallic or metaloxide targets Two different special regimes can be used In the first one the formation of “extra” ... by profilomentry and ellipsometry for those tungsten oxidethin films deposited with interruptions during the deposition process The formation into the body of the thin film of several “extra” interfaces...
... structure for optimizing the device performance Additionally, NiO thinfilms fabricated by thermal oxidation of evaporated Ni film are also characterized for comparison with the sputtered films 2.1.2 ... with suitably uniform tube walls by oxidation of nickel nanowires was demonstrated for the first time The applications of NiO thinfilms and nanostructures were then investigated for resistive switching ... Experimental Details .29 Growth of ThinFilms and Nanowires 29 3.1.1 Sputtering forthin film growth 29 3.1.2 Chemical bath deposition for porous film growth 30 3.1.3 Anodization,...
... selected metaloxide sensors to identify the gases under tests by means of pattern recognition and classification techniques Experimental 2.1 Fabrication of thick-film sensor arrays Porous metaloxide ... onboard computational power for miniaturized sensors Mr Marquis has special technical expertise in thin- film deposition and metaloxide film design and engineering for selective detection of chemical ... and PCA transformed features were standardized to a zero mean and unity variance for each dimension The standardization was not necessary for the point features due to the transforms used to...
... Performance of Zinc OxideThinFilms 1990 - M.S., Metallurgical Engineering, Yonsei University, Seoul, KOREA Thesis title: Characterization of Defects in Sputtered AlN Protective Thin Film for ... rates of sputtered ZnO thinfilms The following other semiconducting oxide films, e.g SnO2, WO3, CTO and V2O5 were investigated and compared with ZnO films These oxides films were fabricated onto ... semiconducting oxides including SnO2 is still poor since the focus has been on the empirical optimization of sensor performance Even though semiconducting oxidethinfilms have been actively investigated for...
... applicable to large-area device fabrication Much effort has been made for solution process development that can form nanoscale -thin organic films with a large area while minimizing material wastes ... performance made by the electrospray process The summary of device performances is in Table To investigate the difference between electrospray and spin-coating processes, PVK thinfilms were formed ... the electrospray process to organic thinfilms in OLEDs was demonstrated in small-scale devices [12] In this work, we demonstrated nanoscale-thick organic thinfilms using the electrospray process...
... for SRSO:Er layers It was shown that thinness-related effects decrease the PL forthinfilms by a factor of These effects are mainly due to three origins: (1) high stress prevailing in thinfilms ... the evolutions of IPL in function of the Si excess for the 50-nm-thick films The IPL optimum is reached for about 14 at.%, before decreasing for higher Si contents In parallel, we observe a gradual ... high as nm The observed darker regions in (b) are accounted for Er-clusters and are observed also in some regions of thinfilms the film thinness are to be circumvented and/or considered To estimate...
... same conditions as for film preparation, but in an oxygen-free atmosphere This procedure ensures an oxide- free metallic surface for each deposition For the deposition of the films, both oxygen ... produced by the aqueous sol-gel method Thin Solid Films 2003, 436:269 Manning TD, Parkin IP, Blackman C, Qureshi U: APCVD of thermochromic vanadium dioxide thinfilms - solid solutions V2-xMxO2 (M ... achieved for Mo-doped and Nb-doped films, respectively The transition temperature (Tt) obtained for the pure VO2 film prepared by pulsed-DC sputtering was 59°C, which is lower than that obtained for...
... studied extensively for the metal- supported metaloxide sensors but the observance of such mechanism for the metal- only sensors has not been reported so far In the case of metalmetaloxide sensors, ... typical X-ray diffraction patterns (XRD) for the sputtered Pd thin films Film thickness of 150 nm was same for sputtered thin films used for hydrogen sensing Grain size in the films was observed to ... 2008), p 1967 15 F Wu, J.E Morris, Thin Solid Films 246, 17 (1994) 16 Y.-T Cheng, Y Li, D Lisi, W.M Wang, Sens Actuators B: Chem 30, 11 (1996) 17 A Barr, Thin Solid Films 41, 217 (1977) 18 T Xu, M.P...
... Ouyang Jianyong for extending prompt support in my final year when I was unable to carry out research at SERIS due to unfortunate and unforeseen circumstances Financial support in the form of a Ph.D ... extraction layer 25 2.9 Motivation 27 2.9.1 Metal oxides interfacial layers 27 2.9.2 Solution processing metaloxide interfacial layers 28 2.9.3 Objective of This Work ... relevance for lightweight and flexible applications The results presented in this dissertation are focused on exploring wet chemical or solution processes to fabricate metaloxidefilms that...
... associated with thinfilms are thought to have significant effects [21-23] Studies on ferroelectric thinfilms are therefore complicated The performance of a specific ferroelectric thin film is ... potential of BTS thinfilms The efforts toward improving the tunable and pyroelectric properties of BTS thinfilms have demonstrated the appealing prospective applications of BTS thinfilms in the relevant ... 2.1 Competing technologies for tunable circuits…………………… ….…26 Table 3.1 Deposition conditions for BTS thinfilms ……………………………39 Table 3.2 Properties of the BTS thinfilms with different thicknesses……………52...
... α-Fe2O3 thinfilms The synthesis of α-Fe2O3 thinfilms by a two-step process comprising the electrodeposition of thin iron films and the calcination of the iron films in air at 650℃ to form hematite ... solution 22 Fig 3.1 XRD patterns of (a) as-deposited iron thin films, (b) α-Fe2O3 thinfilms obtained from the as-deposited iron thinfilms after two hours of calcination in air at 650 oC (c) ... synthesize α-Fe2O3 thinfilms This method has the advantages of being simple, low cost, environmental friendly and potentials for further modifications by metal doping The α-Fe2O3 thinfilms showed...
... Systemic Study of Indium Zinc OxideThinFilms 32 Transparent Amorphous Indium Zinc OxideThinFilms B Kumar Chapter Transparent Amorphous Indium Zinc OxideThinFilms 3.1 Introduction This chapter ... polycrystalline films were calculated by Scherrer’s formula {Equation (2.8)} A Systemic Study of Indium Zinc OxideThinFilms 35 Transparent Amorphous Indium Zinc OxideThinFilms G= B Kumar ... Zinc OxideThinFilms 38 Transparent Amorphous Indium Zinc OxideThinFilms B Kumar has been extensively employed in the analysis of the free carrier absorption for transparent conducting oxides.3...
... for 1h for times to remove the excess lithium ions in the form of LiOH Finally, the suspension was centrifuged at 3000rpm for 0.5h for 3-4 times to remove the thicker materials MoS2 thinfilms ... optoelectronics 1.2 Atomically thinfilms of two dimensional transition metal dichalcogenides The weak van der Waals forces between the layers allow isolation of atomically thin sheets of LTMDs via ... of LTMDs in organic solvents Furthermore, atomically thinfilms of LTMDs can be synthesized by several other methods For instance, MoS2 thinfilms were successfully synthesized by annealing (NH4...
... Techniques foroxide film growth The opportunities offered by oxidefilms in many applications have aroused great interests in exploring the techniques to fabricate them For the synthesis of oxidefilms ... Transition Metal Oxides, Wiley/VCH, New York, (1998) [3] A.J Moulson, J.M Herbert, Electroceramics, Chapman & Hall, London, (1990) [4] P.A Cox, Transition Metal Oxides, Oxford University Press, Oxford, ... films of most perovskite oxides This leads to a large strain in the perovskite oxide films, which can be used to improve the properties of the oxides and to study the stress effect in these oxides...
... become the molecular target for the development of many cancer therapeutics Despite intense research on the folate structureactivity relationship, the molecular basis for the high affinity recognition ... methionine synthase (MS) Finally, THF together with formate and ATP are substrates for formate–tetrahydrofolate ligase (MTHFD1) to synthesize 10-formal THF, which is another important functional ... ribonucleotide transformylase (GARFT) and aminoimidazole-4carboxamide ribonucleotide transformylase (AICARFT) subsequently add one LITERATURE REVIEW carbon group from 10-formyl THF to the purine...
... embedded within the matrix of metaloxide Based on these results, the modulation of the width of two depletion layers existing at the surface of metaloxide grains and at the interface of metaloxide ... enhanced performance of hybrid metal oxide/ MWCNT sensors in comparison with pure metaloxide or pure MWCNT sensors Acknowledgements This work was funded in part by the Spanish Commission for Science ... reported for 1/100 wt.% MWCNT/WO3 sensors and 1/1000 wt.% MWCNT/WO3 sensors were irresponsive to NO2 Therefore, sensor responsiveness heavily depends on the amount of MWCNTs dispersed on the metal oxide...
... tungsten oxide and molybdenum oxide [4] 1.2.1 Crystal structures of tungsten oxide and molybdenum oxideFor Mo oxide, just as for W oxide, the basic structural element is an octahedron with a metal ... which these oxidethinfilms grow Here we suppose that a thin layer of oxide exists in the metal and is growing; we require to know how fast it grows We consider a film of oxide on the metal exposed ... ions leave a metal and pass through oxide layer (Mott 1947) We may also introduce the energy Φ required to remove an electron from the metal into the conduction band of the oxide; foroxide grown...
... Grain-size effects in tungsten oxide- based sensor for nitrogen oxides, J Electrochem Soc 141 (1994) 2207 – 2210 [4] G Sberveglieri, G Faglia, S Groppelli, P Nelli, Methods for the preparation of NO, ... tin oxidethin films, grown by means of the r.f magnetron sputtering technique, Sensors and Actuators B (1992) 79 – 88 [5] N Miura, S Yao, Y Shimizu, N Yamazoe, New auxiliary sensing materials for ... surface acoustic wave chemical sensor for NO2, Sensors and Actuators 19 (1989) 385 – 392 [7] T Inoue, K Ohtsuka, Y Yoshida, Y Matsuura, Y Kajiyama, Metaloxide semiconductor NO2 sensor, Sensors...
... Barrier Films Sulfide Films Glassy Thick Films Unsupported Glass Films New Oxide- Based Gel Films Organic Modified Silicate Films Scuff Resistant Layers Solid Phase System for ... All-Alkoxide Method Probably materials following the best starting materials for solgel preparations are the class of known as metal alkoxides All metals form alkoxides and they have the general formula: ... Cataloging-in-Publication Data Sol-Gel technology forthin films, fibers, preforms, electronics, and speciality shapes Bibliography: p Includes index Ceramic materials Glass fibers Thinfilms Colloids I Klein, Lisa...