scholarly journals Magnetically-sensitive nanodiamond thin-films on glass fibers

2022 ◽  
Author(s):  
Paulina Nakonieczna ◽  
Mona Jani ◽  
Saravanan Sengottuvel ◽  
Mariusz Mrózek ◽  
Pawel Dabczynski ◽  
...  
Keyword(s):  
Thin Films ◽  
Glass Fibers

Photocatalytic Degradation of Humic Acid Using Fe3+ and N-Doped 3SnO2/TiO2 Thin Films Coated on Glass Fibers

2014 ◽  
Vol 608 ◽  
pp. 164-169
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Humic Acid ◽  
Glass Fibers ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
High Photocatalytic Activity ◽  
Coating Methods ◽  
Uv Lamp

The Fe3+ and N–doped 3SnO2/TiO2 composite thin films and undoped films coated on glass fibers were prepared by sol–gel and dip–coating methods. The films were calcined at 600°C for 2 hour and characterized by XRD, SEM, EDS and XPS. The photocatalytic activity of the coated glass fibers was determined by means of degradation of a methylene blue (MB) solution and humic acid (HA). It was found that the optimized 20N/3SnO2/TiO2composite films exhibit a high photocatalytic activity and HA could be rapidly removed from water. The main factor affecting the HA degradation of 20N/3SnO2/TiO2 films is quantity of glass fibers loading, irradiation power of UV lamp and flow rate of water.

Effect of Deposition Conditions on TiO2 Thin Film on Silica Glass Fibers by Liquid Phase Deposition

2007 ◽  
Vol 336-338 ◽  
pp. 1921-1923
Author(s):  
Shun Li ◽  
Jia Chen Liu ◽  
Chao Liang Cui ◽  
Li Bin Liu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Silica Glass ◽  
Glass Fibers ◽  
Growth Patterns ◽  
Liquid Phase Deposition ◽  
Tio2 Thin Films ◽  
Experimental Conditions ◽  
Nano Crystalline ◽  
Deposition Conditions

Crystalline TiO2 thin films coated on silica glass fibers and nano-powders were prepared by adding H3BO3 into an (NH4)2TiF6 solution supersaturated with anatase nano-crystalline TiO2 at 40°C. The effect of the deposition conditions on the surface morphology, section morphology, growth patterns, thicknesses of the deposited TiO2 thin films were investigated. Growth rate and particle size of the thin films were controlled by the deposition conditions. As a result, a well-combined and durable TiO2 thin films on silica glass fibers surface obtained under definite optimizing experimental conditions and parameters.

Enhanced Photocatalytic Degradation of Fulvic Acid Using N–Doped SnO2/TiO2 Thin Film Coated Glass Fibers under UV and Solar Light Irradiation for Drinking Water Purification

2016 ◽  
Vol 835 ◽  
pp. 359-365 ◽  
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Visible Light ◽  
Nitrogen Doping ◽  
Glass Fibers ◽  
Band Gap Energy ◽  
Visible Light Region ◽  
Gap Energy ◽  
Light Region ◽  
Degradation Rates

The degradation of fulvic acid (FA) using N–doped SnO2/TiO2 composite thin films coated on glass fibers prepared by sol–gel and dip–coating methods was investigated. The effects of nitrogen doping on coating morphology, physical properties, and FA degradation rates were experimentally determined. Nitrogen doping has an effect on shifting the optical absorption wavelength to visible light region, narrowing the band gap energy and reducing crystallite size which lead to the enhancement of photocatalytic performance. The optimal FA degradation rates of 40N/SnO2/TiO2 composite thin films under UV and solar irradiation are about 2.4 and 2.0 folds higher than that of TiO2 film, respectively due to its narrowest band gap energy (optical absorption wavelength shifting to visible light region) and small crystallite size influenced by nitrogen doped.

Glass Fibers Covered with TiO2 Thin Films by Sol-Gel Method as a Photocatalyst Reactor to Degradation Toluene

2009 ◽  
Vol 79-82 ◽  
pp. 927-930 ◽  
Author(s):  
Ching Hsing Lin ◽  
Chen Yu Chang ◽  
Yu Jie Chang ◽  
Jyh Wei Lee ◽  
Mei Yin Hwa ◽  
...  
Keyword(s):  
Thin Films ◽  
Glass Fibers ◽  
Sol Gel ◽  
Light Illumination ◽  
X Ray Diffraction ◽  
Tio2 Thin Films ◽  
Photocatalytic Ability ◽  
Toluene Concentration ◽  
Tio2 Sol ◽  
Uv Lamp

TiO2 thin films obtained by sol-gel and dipping deposition on glass fibers substrates followed by thermal treatment was used in this works. In an attempt to understand the structure and the morphology of TiO2 sol-gel thin films, analysis by X-ray diffraction (XRD) and scanning electron microscopy (SEM) are reported. Degradation of toluene under 365 nm light illumination was conducted to evaluate the photocatalytic ability of the TiO2 thin films. A special design of glass reactor allowed the UV lamp to be located in the center of the reactor. The photocatalyst reactor was then filled with TiO2 thin films/glass fibers substrates to exams the photocatalysis of toluene vapor ranged from 10 to 1,000 ppmv. Toluene depletion was sampled by gas chromatography (GC). The results showed that the photocatalytic performance of the reactor had high toluene depletion efficiency of 99.9% under 20 ppmv, and the efficiency decreased when toluene concentration were 100 and 1,000 ppmv. The improvement of the photocatalytic activity was ascribed to the fibers-based reactor provides a significantly huge surface area of the TiO2 thin films. These results will be useful and assist engineers to design photocatalyst reactors for the VOCs removal.

Sol-Gel TiO2 Thin Films Sensitized with the Natural Botanical Dyes

2011 ◽  
Vol 356-360 ◽  
pp. 1743-1746
Author(s):  
Ching Hsing Lin ◽  
Yao Chuan Lee ◽  
Yi Hao Chien ◽  
Wei Ming Tseng
Keyword(s):  
Thin Films ◽  
Low Cost ◽  
Glass Fibers ◽  
Sol Gel ◽  
Dip Coating ◽  
Light Illumination ◽  
Sem Images ◽  
Research Attention ◽  
Photocatalytic Ability ◽  
Gardenia Jasminoides

Given the low cost of their components and their demonstrated reliable efficiencies, dye-sensitized techniques based on the titanium dioxide (TiO2) thin films have received much research attention in the past decade. The dSubscript textye/TiO2thin films were prepared on glass fibers substrate by a dip-coating method combined with a sol-gel process and the photocatalytic of acetone was investigated in this study. The natural botanical dye of Gardenia jasminoides with absorption reflection intensity in 410-460 nm of liquid extraction was used to improve the photo absorbability under illumination of visible light source. Degradation of acetone under 420 nm light illumination was conducted to evaluate the photocatalytic ability of the dye/TiO2thin films. The SEM images evidence that fibers existed in the dye/nano-TiO2composites. The dye/TiO2thin films catalyst prepared in the laboratory shoSubscript textwed photocatalytic performance with the degradation efficiency of 55% under 420 nm. A few percentages increase in removal efficiency when compared with the dye less TiO2thin films.

Low Temperature Preparation and Microstructure of TiO2 Nanostructured Thin Films Coated Short Glass Fibers by Biomimetic Synthesis Technology

2013 ◽  
Vol 537 ◽  
pp. 229-233
Author(s):  
Ming Qiu Wang ◽  
Jun Yan ◽  
Shi Guo Du ◽  
Yi Guo ◽  
Hong Guang Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Composite Coatings ◽  
Glass Fibers ◽  
Biomimetic Synthesis ◽  
Wear Property ◽  
Organic Amine ◽  
Nanostructured Thin Films ◽  
Low Temperature Preparation ◽  
Short Glass

By using organic amine as the soft template, TiO2 nanostructured thin films have been deposited on the surface of short glass fibers (SGFs) by biomimetic synthesis technology at low temperature (85°C). The properties of composite particles, including surface morphology, the phase composition of the coating layer and microstructure were characterized by SEM, XRD, XPS and Raman. The results show that the functional layers containing NH2 and OH groups can be formed through a kind of organic amine, which can induce the bio-mineralization of nano-TiO2 on the SGFs surfaces. The XRD shows that TiO2 thin films uniformly coated on SGFs surfaces were mainly anatase. The surface roughness of SGFs was remarkably increased after coating. Compared with uncoated SGFs as filler, the abrasive loss of composite coatings decreased to 47 percent of that coatings filled with uncoated SGFs, when the composite fiber powders were filled in wear-resistant coatings based on the silicone modified epoxy resins. Therefore, anti-wear property of coatings was notably enhanced.

The study of interfacial reactions of nickel thin films on GaAs

1983 ◽  
Vol 41 ◽  
pp. 156-157
Author(s):  
L.J. Chen ◽  
Y.F. Hsieh
Keyword(s):  
Thin Films ◽  
Integrated Circuits ◽  
Interfacial Reactions ◽  
Metal Contacts ◽  
Nickel Thin Films ◽  
Thin Foils ◽  
The Status ◽  
Si Doped ◽  
Electron Microscopes

One measure of the maturity of a device technology is the ease and reliability of applying contact metallurgy. Compared to metal contact of silicon, the status of GaAs metallization is still at its primitive stage. With the advent of GaAs MESFET and integrated circuits, very stringent requirements were placed on their metal contacts. During the past few years, extensive researches have been conducted in the area of Au-Ge-Ni in order to lower contact resistances and improve uniformity. In this paper, we report the results of TEM study of interfacial reactions between Ni and GaAs as part of the attempt to understand the role of nickel in Au-Ge-Ni contact of GaAs.N-type, Si-doped, (001) oriented GaAs wafers, 15 mil in thickness, were grown by gradient-freeze method. Nickel thin films, 300Å in thickness, were e-gun deposited on GaAs wafers. The samples were then annealed in dry N2 in a 3-zone diffusion furnace at temperatures 200°C - 600°C for 5-180 minutes. Thin foils for TEM examinations were prepared by chemical polishing from the GaA.s side. TEM investigations were performed with JE0L- 100B and JE0L-200CX electron microscopes.

Studies on Water in the Hydration Chamber of a Modified Electron Microscope

1970 ◽  
Vol 28 ◽  
pp. 544-545
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
Steady State ◽  
Room Temperature ◽  
Small Mass ◽  
Equilibrium Pressure ◽  
Biological Objects ◽  
Mechanical Pump ◽  
Differential Pumping

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

Nucleation and Early Growth of Sputtered thin Films

1970 ◽  
Vol 28 ◽  
pp. 516-517
Author(s):  
Dudley M. Sherman ◽  
Thos. E. Hutchinson
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
Ion Beam ◽  
Ion Source ◽  
Water Cooling ◽  
Stages Of Growth ◽  
Lens Assembly ◽  
Microscope Technique ◽  
Ion Beam Sputter Deposition

The in situ electron microscope technique has been shown to be a powerful method for investigating the nucleation and growth of thin films formed by vacuum vapor deposition. The nucleation and early stages of growth of metal deposits formed by ion beam sputter-deposition are now being studied by the in situ technique.A duoplasmatron ion source and lens assembly has been attached to one side of the universal chamber of an RCA EMU-4 microscope and a sputtering target inserted into the chamber from the opposite side. The material to be deposited, in disc form, is bonded to the end of an electrically isolated copper rod that has provisions for target water cooling. The ion beam is normal to the microscope electron beam and the target is placed adjacent to the electron beam above the specimen hot stage, as shown in Figure 1.

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