Thematische Bibliographien / Sensitive film deposition

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Auswahl der wissenschaftlichen Literatur zum Thema „Sensitive film deposition“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Sensitive film deposition"

Eljali, Ahmed, Irwana Nainggolan, Shahrir Hashim und Tulus Ikhsan Nasution. „Highly Response and Sensitive Copper Sensors Based on Chitosan Films“. Advanced Materials Research 1125 (Oktober 2015): 255–59. http://dx.doi.org/10.4028/www.scientific.net/amr.1125.255.

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Discharge of metal containing effluents into water has been a major concern. Traditional detecting methods were proven to be ineffective and expensive. This paper proposes the use of chitosan film as a highly response and sensitive film sensor towards Cu ion due to its positive charge and electrical characteristic. Chitosan film was deposited by using electrochemical deposition technique. Different deposition times were applied to study the effect of deposition time on sensing properties of chitosan films, in which the best performance time of 90 seconds was recorded. This study was carried out to investigate the sensing performance of chitosan films toward variation concentrations of copper ion. Contaminated air exposure technique was used in this work to detect the concentrations of copper ion. The chitosan film sensors showed different sensor output toward deionized water and 0.005 M, 0.01M, 0.05M, 0.1M copper ions. The results showed that chitosan films had good sensitivity, fast response, stable and excellent recovery time. Scanning electron microscopy was employed to characterize chitosan film structure.

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Constantinoiu, Izabela, Dana Miu und Cristian Viespe. „SAW Hydrogen Sensors with Pd/SnO2 Layers“. Materials 15, Nr. 22 (13.11.2022): 8012. http://dx.doi.org/10.3390/ma15228012.

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Pd/SnO2 bilayers for surface acoustic wave (SAW) sensors were obtained using pulsed laser deposition (PLD). Bilayers were made at several deposition pressures in order to observe the influence of the morphology of the sensitive films on the response of the sensors. The morphological properties were analyzed by scanning electron microscopy (SEM). The SnO2 monolayers were initially deposited on quartz substrates at 100, 400 and 700 mTorr, to observe their morphology at these pressures. The Pd/SnO2 bilayer depositions were made at 100 and 700 mTorr. The sensors realized with these sensitive films were tested at different hydrogen concentrations, in the range of 0.2–2%, at room temperature. In order to establish selectivity, tests for hydrogen, nitrogen, oxygen and carbon dioxide were carried out with SnO2-700, Pd-100/SnO2-700 and Pd-700/SnO2-700 sensors. The sensor with the most porous sensitive film (both films deposited at 700 mTorr) had the best results: a sensitivity of 0.21 Hz/ppm and a limit of detection (LOD) of 142 ppm. The morphology of the SnO2 film is the one that has the major influence on the sensor results, to the detriment of the Pd morphology. The use of Pd as a catalyst for hydrogen improved the sensitivity of the film considerably and the selectivity of the sensors for hydrogen.

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Eljali, Ahmed, Irwana Nainggolan, Shahrir Hashim, Tulus Ikhsan Nasution und Nur Zurihan Abd Wahab. „Fabrication of Chitosan-Polyethylene Oxide Polymeric Thin Film Using Electrochemical Deposition for Detection of Volatile Organic Compounds“. Key Engineering Materials 744 (Juli 2017): 359–63. http://dx.doi.org/10.4028/www.scientific.net/kem.744.359.

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This study focused on the fabrication of chitosan-polyethylene oxide sensitive thin film. The polyethylene oxide was used as an additive to enhance the electrical properties of chitosan towards ethanol and methanol gases. The chitosan-polyethylene oxide sensitive film was fabricated using electrochemical deposition technique to deposit a thin film of the sensitive blend on the printed circuit board surface. The sensitive blend electrical (I-V) properties were tested using a specific developed test chamber. Ethanol and methanol volatile organic compound gases were chosen in this work to study the thin sensing properties of the chitosan-polyethylene oxide film. The analyzed data demonstrated that chitosan-polyethylene oxide sensitive film was capable to detect the VOC gas molecules and showed that the sensitive blend was significantly selective to ethanol over methanol gas with output values of 0.31 µA and 0.023 µA respectively. Atomic force microscopy test was used to characterize the morphology and roughness of the pure chitosan and chitosan-polyethylene oxide sensitive films.

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Yunus, Yusniza, Nurul Adlin Mahadzir, Mohamed Nainar Mohamed Ansari, Tg Hasnan Tg Abd Aziz, Atiqah Mohd Afdzaluddin, Hafeez Anwar, Mingqing Wang und Ahmad Ghadafi Ismail. „Review of the Common Deposition Methods of Thin-Film Pentacene, Its Derivatives, and Their Performance“. Polymers 14, Nr. 6 (10.03.2022): 1112. http://dx.doi.org/10.3390/polym14061112.

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Pentacene is a well-known conjugated organic molecule with high mobility and a sensitive photo response. It is widely used in electronic devices, such as in organic thin-film transistors (OTFTs), organic light-emitting diodes (OLEDs), photodetectors, and smart sensors. With the development of flexible and wearable electronics, the deposition of good-quality pentacene films in large-scale organic electronics at the industrial level has drawn more research attention. Several methods are used to deposit pentacene thin films. The thermal evaporation technique is the most frequently used method for depositing thin films, as it has low contamination rates and a well-controlled deposition rate. Solution-processable methods such as spin coating, dip coating, and inkjet printing have also been widely studied because they enable large-scale deposition and low-cost fabrication of devices. This review summarizes the deposition principles and control parameters of each deposition method for pentacene and its derivatives. Each method is discussed in terms of experimentation and theory. Based on film quality and device performance, the review also provides a comparison of each method to provide recommendations for specific device applications.

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Kuk, Seoung Woo, Seok Hwan Bang, In Hoe Kim, Sun Yeol Jeon, Hyeong Tag Jeon, Hyung Ho Park und Ho Jung Chang. „Chemical and Electrical Properties of ZnS Deposited with DEZ and H₂S by Atomic Layer Deposition Method“. Materials Science Forum 544-545 (Mai 2007): 689–92. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.689.

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ZnS thin films were grown by Atomic Layer Deposition (ALD) method with Diethyl- Zinc (DEZ) and hydrogen sulfide (H2S) for the application of a channel layer of OITFT (Organic-Inorganic Thin-Film Transistor). ZnS has many advantages such as high channel mobility, high deposition rate, transparency at room temperature due to the broad band gap (bandgap of ZnS : 3.7 eV), nontoxic characteristic, low resistivity, and less sensitive about oxidation than ZnO. The deposition rate of the ZnS films in our system was about 1.6 Å/cycle. ZnS film was characterized by AES, XRD, Hall-effect measurement.

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Liu, Huan, Shan Shan Wang, Chang Long Cai und Shun Zhou. „Uncooled Infrared Bolometer Arrays with α-Si and Metal Films“. Materials Science Forum 663-665 (November 2010): 421–24. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.421.

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A bolometer with stress equilibrium based on α-Si and metal films is proposed in this paper. The sensitive and support material α-Si films are prepared by plasma enhanced chemical vapor deposition（PECVD）, their stress and deposition rate are studied, and the technological parameter of the low stress and higher temperature coefficient of resistance (TCR) α-Si film are obtained. The result shows that the stress of the α-Si films can be adjusted between positive and negative. Pt films are deposited by electron-beam evaporating equipment. Their square resistance, TCR and stress are tested by four point resistivity test system and film-stress interferometer. The result shows this material is a good heat-sensitive material, and at the same time it can balance the stress of α-Si film. Finally it is found that Pt film is in compressive stress state in the selected technological parameters, and α-Si thin film is in tensile stress state, so the stress of micro-bridge structure can be balanced by this method. In the final, 160×120 infrared micro-bridge array on the wafer and read out integrated circuit (ROIC) chip are successfully fabricated.

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Messier, Russell. „Deposition Processes“. MRS Bulletin 13, Nr. 12 (Dezember 1988): 29–32. http://dx.doi.org/10.1557/s0883769400063661.

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My introduction in the November MRS BULLETIN to this two-part series on deposition processes discussed the extensive use of thin films in science and technology. That it takes two issues and nine articles to cover this topic — and by no means exhaustively — is testimony to the manifold ways thin films are prepared.If all deposition processes resulted in the same product, then such extensive coverage would be redundant and unnecessary. Thin films, however, cover a virtual infinity of free energy states — and related crystal structures, micro-structures, defects, defect densities, impurities, compositions, composition modulations, etc. — that are sensitive to the particular deposition process and its conditions. It is this richness of choice that makes thin film science and technology both exciting and, at times, frustrating.Along with the freedom to extensively vary thin film characteristics, resulting properties and applications comes the difficulty in understanding preparation-characterization-property relations in enough detail to control and reproduce deposition processes.The November articles covered molecular dynamics computer modeling of nucleation and growth processes, molecular beam epitaxy, organometallic vapor phase epitaxy, and chemical vapor deposition. This month's articles continue the sequence of ways to deposit films, the general direction being toward lower substrate temperatures. Plasmas, which offer both increased flexibility and complexity, are primarily considered. The last article covers thermal plasmas, not to control the vapor deposition but to melt powders which result in a multiple splat-quenched array of particles that form coatings important to industry.

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Ryu, Hyun Wook, Yong Joo Park, Hyo Sup Noh und Jin Seong Park. „Characteristics of SnO₂ Thin Films Deposited by RF Magnetron Sputtering“. Materials Science Forum 449-452 (März 2004): 993–96. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.993.

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SnO2 thin films were prepared on SiO2/Si substrate by RF-Magentron Sputtering method, varying the deposition time and Ar-to-O2 flow ratio. The post-annealing was conducted at 500 oC and 700 oC in Ar and O2 atmosphere, respectively. Film characteristics were very sensitive to the gas flow ratio during the deposition and the conditions of post-annealing. The Film thickness decreased with decreasing of Ar flow ratio at a constant amount (50 sccm) of total gas flow. Especially, the film deposited under Ar-O2 mixture gas (Ar-to-O2 ratio of 50%) showed clearly aggregated morphology of small particles (cauliflower) in a wide range of area. In the annealed films, these cauliflowers separated some small grains, decreasing the film thickness.

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Yoshida, Kentaro, Yu Kashimura, Toshio Kamijo, Tetsuya Ono, Takenori Dairaku, Takaya Sato, Yoshitomo Kashiwagi und Katsuhiko Sato. „Decomposition of Glucose-Sensitive Layer-by-Layer Films Using Hemin, DNA, and Glucose Oxidase“. Polymers 12, Nr. 2 (04.02.2020): 319. http://dx.doi.org/10.3390/polym12020319.

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Glucose-sensitive films were prepared through the layer-by-layer (LbL) deposition of hemin-modified poly(ethyleneimine) (H-PEI) solution and DNA solution (containing glucose oxidase (GOx)). H-PEI/DNA + GOx multilayer films were constructed using electrostatic interactions. The (H-PEI/DNA + GOx)5 film was then partially decomposed by hydrogen peroxide (H2O2). The mechanism for the decomposition of the LbL film was considered to involve more reactive oxygen species (ROS) that were formed by the reaction of hemin and H2O2, which then caused nonspecific DNA cleavage. In addition, GOx present in the LbL films reacts with glucose to generate hydrogen peroxide. Therefore, decomposition of the (H-PEI/DNA + GOx)5 film was observed when the thin film was immersed in a glucose solution. (H-PEI/DNA + GOx)5 films exposed to a glucose solution for periods of 24, 48 72, and 96 h indicated that the decomposition of the film increased with the time to 9.97%, 16.3%, 23.1%, and 30.5%, respectively. The rate of LbL film decomposition increased with the glucose concentration. At pH and ionic strengths close to physiological conditions, it was possible to slowly decompose the LbL film at low glucose concentrations of 1–10 mM.

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Lima, Roberto R., Leonardo F. Hernandez, Edsion Pecoraro, Estevão Rosim-Fachini und Maria L. P. da Silva. „Composite Material Sensitive to Volatile Organic Compounds“. Materials Science Forum 730-732 (November 2012): 289–94. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.289.

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This work evaluates fluorinated thin films and their composites for sensor development. Composites were produced using 5 µm starch particles and plasma films obtained from organic fluorinated and silicon compounds reactants. Silicon wafers and aluminum trenches were used as substrates. Film thickness, refractive index and chemical structure were also determined. Scanning electron microscopy shows conformal deposition on aluminum trenches. Films deposited on silicon were exposed to vapor of volatile organic compounds and CV curves were obtained. A qualitative model (FemLab 3.2® program) was proposed for the electronic behavior. These environmentally correct films can be used in electronic devices and preferentially reacted to polar compounds. Nonetheless, due to the difficulty in signal recovery, these films are more effective in one-way sensors, in sub-ppm range.

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Dissertationen zum Thema "Sensitive film deposition"

Le, Pennec Fabien. „Développement de microcapteurs pour la mesure de dioxyde de carbone (CO2) : application au suivi de la qualité de l’air“. Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0148.

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A la différence de la pollution de l’air extérieur, celle de l’air intérieur est restée relativement peu étudiée jusqu’au début des années 2000. Pourtant, nous passons en moyenne 85 % de notre temps dans des environnements clos (domicile, bureaux, transports…) dans lesquels nous sommes exposés à de nombreux polluants. De nombreuses études ont montré que la mesure de la concentration du dioxyde de carbone, permet d’évaluer le confinement de l’air intérieur. Pour mesurer les polluants, nous pouvons distinguer les analyseurs et les microcapteurs, avec chacun ses avantages et ses inconvénients. Dans le cas de la qualité de l’air intérieur, les microcapteurs de type résistif paraissent comme la solution la plus appropriée, de par leur faible coût, leur haute sensibilité, leur miniaturisation possible et leur faible consommation. Le phénomène de détection s’établit sur la variation de la résistance électrique de l’élément sensible en réponse à un taux d’adsorption du gaz. Mes travaux de recherche se sont concentrés sur l’étude de la couche sensible. Nous avons utilisé la méthode de dépôt par screen printing, technique simple, rapide et peu coûteuse. La structure cristalline et la morphologie ont pu être déterminées ainsi que l’identification des substances chimiques présentes dans nos matériaux suivant des techniques de caractérisations physico-chimiques. Nos résultats ont montré que les capteurs réalisés à base de La2O2CO3 et de BaTiO3, respectivement, présentent de bonnes performances, avec une forte sensibilité au CO2, et un bon taux de répétabilité
Unlike outdoor air pollution, indoor air pollution remained relatively understudied until the early 2000s. However, we spend on average 85% of our time in closed environments (home, offices, transport, etc. in which we are exposed to many pollutants. Numerous studies have shown that measuring the concentration of carbon dioxide makes it possible to assess the confinement of indoor air. To measure pollutants, we can distinguish between analyzers and microsensors, each with its advantages and disadvantages. In the case of indoor air quality, resistive type microsensors appear to be the most appropriate solution, due to their low cost, high sensitivity, possible miniaturization and low power consumption. The detection phenomenon is based on the variation of the electrical resistance of the sensitive element in response to a gas adsorption rate. My research work has focused on the study of the sensitive layer. We used the screen-printing deposit method, a simple, fast and inexpensive technique. The crystalline structure and the morphology could be determined as well as the identification of the chemical substances present in our materials according to physico-chemical characterization techniques. Our results showed that the sensors made from La2O2CO3 and BaTiO3, respectively, present good performances, with a high sensitivity to CO2, and a good repeatability rate

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Zhang, Rong. „Zinc Oxide Thin Films for Dye-Sensitized Solar Cell Applications“. Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1186016777.

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Nateq, Mohammad Hosein. „Enhancing the Photo-electrode Features to Improve the Solar Conversion Efficiency in the Dye-Sensitized Solar Cell“. Doctoral thesis, Università degli studi di Trento, 2019. http://hdl.handle.net/11572/243450.

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Mesoporous semiconductors such as TiO2 nanoparticles, as well as transparent conducting oxides (TCOs) such as indium tin oxide films are typically employed for setting up the photo-electrode module in variety of photoelectrochemical cells including Dye-Sensitized Solar Cells (DSSCs). In order to exhibit a high performance efficiency, the photo-electrodes in such applications are required to be able to harvest the light and transport the generated electrons effectively. Accordingly mesoporous layers with high values of surface area and well-established pore structure along with highly transparent and conductive TCOs are deposited on suitable substrates through the physical or chemical vapor deposition methods. The processing facilities and materials required to fabricate such high-quality devices with high values of efficiency are complicated and expensive, whereas devices of lower quality do not fulfill the demands. This issue is of particular importance regarding the energy production and developing the solar cell technologies, as it is considered by the concept of “cost per watt”. Thus, a great deal of effort is being carried out globally to enhance the efficiency of affordably-produced solar cells such as low-cost DSSCs. Utilizing the wet chemical techniques such as sol-gel method which provide a considerably more affordable route to synthesize nanoparticles and deposit thin films without the need of applying high temperature or vacuum condition is a widely-used approach to decrease the processing expenses. However, to achieve an acceptable cost-per-watt ratio requires enhancing the obtained efficiency value as well, and therefore, modifying the processing procedures to improve the required features of the products are highly encouraged. This thesis focuses on two individual activities: synthesis of TiO2 nanoparticles, and also thin film deposition of a promising TCO called aluminum-doped zinc oxide (AZO); both obtained through the sol-gel route that is modified to contribute to nanostructures with suitable features for application in photoelectrochemical devices such as DSSC. In the first part, mesoporous anatase nanoparticles were synthesized through the surfactant-mediated sol–gel route. Through changing the refluxing time and water-to-surfactant molar ratio, as-prepared nanocrystals of high density and large and narrowly-distributed pore sizes were obtained, displaying surface area values up to 240 m2·g-1, much higher than the reported values for commercial TiO2-based catalysts. In the second part, sol–gel dip–coating of ZnO thin films doped with 2 at.% of aluminium ions was carried out. By altering the hydrolysis reaction and changing the thermal treatment procedure, thin films of highly c-axis preferred orientation were obtained with optical transmittance of around 80% and resistivity values down to 6 – 15 mΩ·cm, corresponding to sheet resistance of around Rsh ~ 500 Ω/sq. The obtained conductivity values, even though one order magnitude lower than those reported for the AZO thin film prepared via expensive techniques, are in the suitable range to improve the cost per watt ratio in applications such as inkjet printing of low-cost printed electronics and more affordable DSSC devices.

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Du, Juan [Verfasser]. „Electrochemical deposition of dye-modified ZnO hybrid thin films and their application to flexible dye-sensitized solar cells / Juan Du“. Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2013. http://d-nb.info/1032724811/34.

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Wu, Kuei-Sian, und 吳奎憲. „The influence of thin film deposition technologies on dye-sensitized solar cells“. Thesis, 2015. http://ndltd.ncl.edu.tw/handle/00349664421013019959.

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碩士
樹德科技大學
電腦與通訊系碩士班
103
In this study, the working electrode of dye-sensitized solar cells (DSSCs) based on all titanium substrates were investigated. Experimentally, electrophoretic deposition and anodic oxidation method will be employed to fabricate the working electrodes of flexible DSSCs. The goals of the project aim to build a high performance electrode with low series resistance, highly conducting charge-transfer, high reduction catalytic activity and good stability. Experimental results show that the optimized anodization condition for preparing titanium dioxide (TiO2) on the titanium mesh is 0.035 M of ammonium fluoride, 400 mA of applied current.

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Yen-YuChu und 朱彥宇. „Electrophoretic Deposition of TiO2 Films for Dye-Sensitized Solar Cells“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/67739983625349089063.

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碩士
國立成功大學
化學工程學系碩博士班
98
The charge transfer rate in the nanocrystalline TiO2 electrode govern the performance of a dye-sensitized solar cell(DSSC). In this study, TiO2 colloids derived from a titanate-directed route and used to prepare electrode by two methods: Paste-coating and Electrophoretic Deposition. Nitrogen absorption-desorption and SEM was used to analysis the pore and electrode morphology. In order to compare the difference of charge transfer, IMPS, IMVS, and EIS were used. By the analysis of nitrogen absorption-desorption and SEM, electrophoretic solution has higher surface area, and the electrode morphology was dense packing. Cell performance of electrophoretic electrode was better than paste-coating because of its high current density. IMPS showed a higher electron transfer rate for electrophoretic electrode, but the electron lifetime is shorter by the IMVS analyzing. In EIS testing, the charge collection efficiency and diffusion length were 91% and 43?m, respectively. The dense packing caused the much more dye to absorb, decreased the path for electron transfer, so electrophoretic electrode has higher charge collection efficiency, current density, and lower open-circuit voltage.

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Chen, Chang-Yi, und 陳昌詣. „Application and Preparation TiO2 Film on Flexible Dye-Sensitized Solar Cells by Electrophoretic Deposition“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/81400605372982130421.

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碩士
明志科技大學
化學工程研究所
98
This study mainly investigated the preparation of the working electrode, the modification of the corresponding electrode and the preparation of a dye-sensitized solar cell (DSSC) on a flexible polyethylene terephthalate (PET) substrate. We hoped that this study can effectively improve the efficiency of a flexible DSSC. During processing a DSSC, we used several film formation methods including electrophoretic deposition, mechanical compression and the chemical binding to improve the DSSC. Then we measured the characteristics of the obtained cell via cyclic voltammetry, DC polarization and AC impedance spectroscopy. The experiment results showed that using the multiple electrophoretic depositions to prepare a TiO2 film could cover the cracks formed by the evaporation of the organic solvent and thus provide better film quality. The optimal thickness of a TiO2 film was 15 μm, which can lead to a maximum short–circuit current of a DSSC when the open circuit potential maintained the same value. When magnesium nitrate was added to the solution used in electrophoretic deposition, the obtained TiO2 film was compact and stable on a PET substrate. Furthermore, this study used self-assembled monolayer (SAM) to modify the counter electrode. Then the characteristics of the electrode were changed by SAM. The result showed that the counter electrode coated SAM was not as expected because SAM prevented the redox electrolyte to penetrate, leading to low currents during an electrochemical reaction.

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Yong-JinLiou und 劉永進. „Electrophoretic Deposition of Rigid and Flexible TiO2 Films for Dye-Sensitized Solar Cells“. Thesis, 2011. http://ndltd.ncl.edu.tw/handle/86805948241123466438.

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Liang-CheChen und 陳良哲. „Electrophoretic Deposition of TiO2 Films for Flexible Dye-Sensitized Solar Cells with Backside Illumination“. Thesis, 2012. http://ndltd.ncl.edu.tw/handle/20187119800835922863.

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碩士
國立成功大學
化學工程學系碩博士班
100
We use electrophoretic deposition (EPD) method to deposite TiO2 nanoparticles on the Ti foil, consisting of repetitive short-term depositions with intermediate drying to prepare nanocrystalline TiO2 films for dye-sensitized solar cells (DSSCs). After calcination, the EPD TiO2 films exhibited a more compact TiO2 network. The effect of five factors, i.e., (i) the thickness of platinum film sputtered on the counter electrode, (ii) sintering temperature of TiO2-coated Ti foil, (iii) the concentration of iodine in the electrolyte, (iv) thickness of TiO2 film, (v) the effect of the scattering layer deposited between the Ti foil and the transparent layer are reported for the photovoltaic performance of a back-illuminated flexible dye-sensitized solar cell with Ti foil substrate for the TiO2 layer. Optimization of these five factors yields a solar cell conversion efficiency 7%. X-ray diffraction (XRD), scanning electron micrographs (SEM), UV-Visible spectrophotometer, intensity-modulated photocurrent spectroscopy (IMPS), intensity-modulated photovoltage spectroscopy (IMVS) and electrochemical impedance spectroscopy (EIS) are used to substantiate the explanation.

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Bücher zum Thema "Sensitive film deposition"

J, Bachmann Klaus, und United States. National Aeronautics and Space Administration., Hrsg. P-polarized reflectance spectroscopy: A high sensitive real-time monitoring technique to study surface kinetics under steady state epitaxial deposition conditions. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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Buchteile zum Thema "Sensitive film deposition"

Datta, Saswati, Yoon-Gi Kim, P. A. Dowben, John A. Glass, Shreyas S. Kher, Scott A. Peters und James T. Spencer. „Palladium and Aluminum Thin Film Deposition on Thermally Sensitive Substrates From Organometallic Complexes“. In Metallized Plastics 3, 65–72. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3416-7_7.

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Oluwafunmilade, Alabi Kelvin, Zine Abidine, Yasutaka Ando, Yoshimasa Noda und Mitsumasa Iino. „Deposition of Porous Photocatalytic TiO2 Film for Dye-Sensitized Solar Cells by Low-Powered Atmospheric Plasma Spray Equipment“. In Renewable Energy and Sustainable Buildings, 945–53. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18488-9_79.

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Yamamoto, Kunio, Kenji Sakai und Shinzo Yoshikado. „Preparation of TiO₂ Thin Films by Electrophoresis Deposition Method for Dye-Sensitized Solar Cells“. In Electroceramics in Japan X, 151–54. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-449-9.151.

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Wang, Ning, Hong Lin, Jian Bao Li, Xiao Zhan Yang, Luo Zheng Zhang und Yin Dou. „Preparation of TiO₂ Nanocrystalline Films by Electrophoretic Deposition and their Application in Dye-Sensitized Solar Cells“. In Key Engineering Materials, 2193–95. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.2193.

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Tlili, Brahim. „Fretting Wear Performance of PVD Thin Films“. In Tribology [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93460.

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Nowadays, most surface treatments are realized through vapor deposition techniques as thin hard coatings to guarantee high surface hardness, low friction coefficient, and improve wear resistance. Several experimental investigations have led to the development of multilayer coatings in preference to the traditional TiN coating. In the current chapter, research was conducted on the fretting wear of (TiAlCN/TiAlN/TiAl) and (TiAlZrN/TiAlN/TiAl) multilayer coatings deposited by reactive DC (magnetron sputtering) of Ti-Al and Ti-Al-Zr alloys on AISI4140 steel. Fretting wear tests (20,000 cycles at 5 Hz) were conducted in ambient conditions, where the interaction between normal load and displacement amplitude determined the fretting regime. The influence of the normal load and displacement amplitude on the coefficients of instantaneous coefficient of friction and stabilized coefficient of friction is different in the two multilayer, coated steels. The PVD coating (TiAlZrN/TiAlN/TiAl) reduces the friction. The worn volume of coated AISI4140 steel is sensitive to normal load and displacement amplitude. The relation between worn volume and cumulative dissipated energy was established for the two coated steels. The energetic fretting wear coefficients were also determined. A multilayer (TiAlZrN/TiAlN/TiAl) coating has a low energetic wear coefficient.

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Konferenzberichte zum Thema "Sensitive film deposition"

Shao, M., X. L. Tang, D. Wen, Y. Chen und G. Qiu. „Atmospheric pressure glow discharge deposition of thermo-sensitive poly (N-isopropylacrylamide)“. In Eighth International Conference on Thin Film Physics and Applications (TFPA13), herausgegeben von Junhao Chu und Chunrui Wang. SPIE, 2013. http://dx.doi.org/10.1117/12.2053956.

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Higashi, G. S., L. J. Rothberg und C. G. Fleming. „Studies of Laser Chemical Vapor Deposition Using Surface Sensitive Infrared Photoacoustic Spectroscopy“. In Microphysics of Surfaces, Beams, and Adsorbates. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/msba.1985.tuc3.

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We report vibrational spectra of surface adsorbates during KrF laser assisted chemical vapor deposition (CVD) of Al films from trimethylaluminum (TMA) on single crystal sapphire substrates. The pulsed optoacoustic technique used has submonolayer sensitivity to O-H and C-H infrared active stretching vibrations and allows studies of the interactions between adsorbed H2O and TMA on surfaces prior to deposition. It also provides information about film composition during the early stages of laser stimulated growth. In addition, because surface Al-CH3 groups can be observed directly, the role of surface phase photochemistry in laser CVD can be investigated.

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Hinrichs, Karsten, Andreas Furchner und Jörg Rappich. „Optical monitoring during the electrochemical deposition of organic layers“. In Applied Industrial Spectroscopy. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ais.2023.am1a.1.

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Infrared (IR) spectroscopy, Raman spectroscopy, Reflection-Anisotropy-Spectroscopy (RAS) and Photoluminescence (PL) spectroscopy are interface and thin-film-sensitive methods for optical monitoring in electrochemical cells. Film properties such as composition, structure and thickness are studied during deposition.

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Deshmane, A. A., R. B. Bhosale und D. J. Salunkhe. „Diversified Methodologies to Prepare Metal Oxide Thin Film for Super Capacitor Applications – A Review“. In National Conference on Relevance of Engineering and Science for Environment and Society. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.118.60.

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In this review, we focused on various deposition methods. Viewing to the literature, the metal oxides have been synthesized by many chemical and thermal treatments, including, chemical oxidation, reduction, chemical vapor deposition, calcinations, annealing, plus laser deposition, and arc discharge, chemical bath deposition etc.1-4. Thin film technology is applicable to various materials, like polymers or metals. Common substrate materials are silicon, steel. The deposition materials and the technology, properties of the substrate material could be enhanced for Specific applications by using Chemical Bath Deposition (CBD). In addition to this, recently thin film technology is applicable for plane objects. In broad view thin film has the number of applications like corrosion preventive, decorative coating, photo detector, image processing, optical memories and mainly storage of energy. With these basic ideas, thin-film is the very easiest accurate, sensitive method for deposition purposes. Apart from this technique, there are various methods for deposition. An innovative way of advancement of thin-film acceptable. Thin-film has more advantages in device preparation from electrochemical characterization. Electrochemical supercapacitor is unique electrochemical devices with high power density, high charge-discharge cycle life with high energy efficiency.

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Sankur, H., und W. Gunning. „Stress and structure in mixed thin TiO2-SiO2 Films“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.mnn4.

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In this paper we discuss the stress and sorbed moisture in mixed SiO2-TiO2 thin films and the dependence of these on deposition temperature and pressure, chemical composition of the film, and annealing conditions. SiO2 and TiO2 commonly used visible range optical thin film materials in gradient-index coatings. Films deposited by evaporative techniques have a porous microstructure. This microstructure and the sorption of moisture in the pores give rise to mechanical stress, which can cause catastrophic failure of the coating. Therefore, techniques to eliminate moisture sorption and to minimize stress are highly desired. It was observed that sorption of water causes compressive stress in SiO2 rich films, indicating different bonding arrangements of sorbed water at the grain surfaces in these two materials. Deposition conditions that promote a denser film microstructure, such as high substrate temperature, low background pressure, or energetic ion bombardment tend to reduce sorbed water and the tensile stress of TiO2 rich films. For a given set of deposition conditions the stress becomes more tensile as the TiO2 content increases. However, this composition dependence is sensitive to the method of mixing, being linear with composition in alternating layered mixtures and nonlinear in codeposited mixtures. Annealing reduces water in the films and increases tensile stress as the film undergoes densification. High temperature annealing also causes segregation and crystallization of TiO2. The grain size dependence on composition and annealing time have been determined for the entire range of compositions.

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Bleakie, Alexander, und Dragan Djurdjanovic. „Dynamic Feature Monitoring Technique Applied to Thin Film Deposition Processes in an Industrial PECVD Tool“. In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50041.

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In semiconductor fabrication processes, reliable feature extraction and condition monitoring is critical to understanding equipment degradation and implementing the proper maintenance decisions. This paper presents an integrated feature extraction and equipment monitoring approach based on standard built-in sensors from a modern 300mm-technology industrial Plasma Enhanced Chemical Vapor Deposition (PECVD) tool. Linear Discriminant Analysis was utilized to determine the set of dynamic features that are the most sensitive to different tool conditions brought about by chamber cleaning. Gaussian Mixture Models of the dynamic feature distributions were used to statistically quantify changes of these features as the condition of the tool changed. Data was collected in the facilities of a well-known microelectronics manufacturer from a PECVD tool used for depositing various thin films on silicon wafers, which is one of the key steps in semiconductor manufacturing. Dynamic features coming from the radio frequency (RF) plasma power generator, matching capacitors, pedestal temperature, and chamber temperature sensors were shown to consistently have significant statistical changes as a consequence of repeated cleaning cycles, indicating physical connections to the chamber condition.

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Zhang, F. S., R. H. Wang, H. Angus Macleod, Robert E. Parks und Michael R. Jacobson. „Surface plasmon resonance detection and removal of contamination from metallic film surfaces“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.thh5.

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The surface plasmon resonance (SPR) phenomenon and its ability in the detection of contamination on the surface of silver films are described. This nondestructive highly sensitive technique has recently been employed to detect the deposition and removal of glass particles, power particles, and a representative vegetable oil from silver films. The cleaning experiments compared the effects of isopropoyl alcohol and acetone and considered the effects of ultrasonic cleaning on contaminant removal and surface roughness. We have concluded that the SPR technique is not very sensitive to particles in the 30-50-µm range and that these particles are easily removed by a high-pressure nitrogen gas. As for oil, the contamination can be removed efficiently by acetone; ultrasonic agitation does clean more effectively.

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Sasaki, Shinichirou, Meng Yang, Ken Suzuki und Hideo Miura. „Highly-Sensitive Graphene Nano-Ribbon-Base Strain Sensor“. In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67602.

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Large-area and high-quality monolayer graphene was synthesized in order to fabricate a graphene-base highly sensitive strain sensor. A rapid LPCVD (Low Pressure Chemical vaper deposition) synthesis process of monolayer graphene was developed by using acetylene as a resource gas. To synthesize high-quality single-crystal graphene, the surface of copper substrate was strongly orientated to (111) crystallographic plane. By optimizing the concentration of acetylene gas by diluting hydrogen, the high quality of monolayer single-crystalline graphene film was successfully grown on the copper substrate. A strain sensor was fabricated using the graphene-coated Cu foils by applying the MEMS process and reactive ion etching (RIE). Then, the sensor was transferred onto a polydimethysiloxane (PDMS) substrate. Tree-dimensional bending test was performed to investigate the piezoresistive property of the patterned graphene nano-ribbon. It was confirmed that the highly sensitive strain sensor was obtained when the width of the nano-ribbon was thinner than 70 nm.

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Prenter, Robin, Steven M. Whitaker, Ali Ameri und Jeffrey P. Bons. „The Effects of Slot Film Cooling on Deposition on a Nozzle Guide Vane“. In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-27171.

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The effects of slot film cooling on deposition in a high pressure nozzle guide vane passage were investigated experimentally and computationally. Experiments were conducted in Ohio State’s Turbine Reaction Flow Rig, using a four-vane cascade, operating at temperatures up to 1353 K. Film cooling was achieved on one of the vanes using a span-wise slot, located at approximately 30% chord on the pressure surface. The coolant’s effect on vane surface temperature was characterized by taking infrared images at various cooling levels. Deposition was produced by injecting sub-bituminous ash particles with a median diameter of 6.48 μm upstream of the vane passage. Several deposition tests were conducted with varying coolant levels. Results exhibit a strong relationship between the coolant flow rate and the amount of ash that deposits on the cooled vane. Capture efficiency was reduced by 70% at the highest coolant flow rate (1.27% of the mass flow rate in the passage). Capture efficiency reduction was compared to that achieved using discrete hole film cooling in other studies. The slot scheme showed similar or larger reductions in capture efficiency at lower coolant mass flow rates. Deposit distribution patterns are affected by regions of cooler temperature, both downstream of the slot where film effects dominate, and slightly upstream of the slot which is cooled by conduction. A computational simulation was conducted to model both the flow and deposition. The solid vane was also discretized to allow for conjugate heat transfer calculations, which produced results that were qualitatively similar to IR measurements, but over predicted the effectiveness of the coolant. An Eulerian-Lagrangian particle tracking model was utilized to track the ash particles through the flow. A sticking model was implemented to determine whether particles stick upon impacting the vane surface, from which deposition rates and distributions are obtained. The computational model under predicted the baseline capture efficiency and the capture efficiency reduction factors for each cooling level, suggesting that the model is not sufficiently sensitive to the temperature changes between tests. Inclusion of surface temperature and local shear dependencies was suggested as an improvement to the sticking model.

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Rahmlow, Thomas D., Jeanne E. Lazo-Wasem und Bruce A. Tirri. „Photometric monitoring and control techniques for manufacture of blended optical thin films“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.thm2.

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Optical thin films generated by the co-deposition of two or more materials exhibit a refractive index proportional to the indices of the components in proportion to the mixing ratio. The coevaporation of Ti2O3 and SiO requires strict control of rates and chamber environmental parameters to maintain proper stoichiometry and film performance. Films are oxidized to TiO2 and SiO2 at the substrate. A broad-band photometer monitors film development in the visible region. Photometer scans are acquired by the control computer every 10 seconds. Film absorption, index, and optical thickness are found to be sensitive to rate as well as trace amounts of water vapor. Absorption is due to unconverted SiO, and although the film will convert on chamber venting or a post bake, absorption inhibits reliable interpretation of photometer results. Reliable results are achieved by using a rule-based computer algorithm during source ramp-up and rate stabilization to verify system readiness. Environmental parameters are compared to a data base of previous runs to verify normal status. Photometer scans and scan-to-scan differences are checked for normal behavior. Computer rules are performance goal-oriented, and system status is weighed against the desired film spectral performance.

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