An Investigation on Surface Sol-Gel Silica Film

Ultrathin silica films were grown on polyimide substrates using surface sol-gel method and the film growth process was characterized by ellipsometry, atomic force microscopy, X-ray photoelectron spectroscopy, Fourier transformed infrared spectroscopy. The polyimide substrates were pretreated by chemical process for promoting the growth of silica film. On the modified polymide surface, the growth of silica films shows an island-like growth type, but not a lay-by-lay process. Moreover, the deposited silica films are not a strict SiO2 film.

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Improved Functional Capabilities of Quasi-Two-Dimensional Tungsten Oxide Nanostructures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.689.55 ◽

2016 ◽

Vol 689 ◽

pp. 55-59

Author(s):

Serge Zhuiykov

Keyword(s):

Photoelectron Spectroscopy ◽

Sol Gel ◽

X Ray Diffraction ◽

Current Sensing ◽

X Ray ◽

Force Microscopy ◽

Functional Capabilities ◽

Atomic Force ◽

Oxide Nanostructures ◽

Afm Analysis

Electrical properties and morphology of orthorhombic β–WO3 nano-flakes with thickness of ~7-9 nm were investigated at the nanoscale using energy dispersive X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and current sensing force spectroscopy atomic force microscopy (CSFS-AFM, or PeakForce TUNATM). CSFS-AFM analysis established good correlation between the topography of the developed nanostructures and various features of WO3 nano-flakes synthesized via a two-step sol-gel-exfoliation method. It was determined that β–WO3 nano-flakes annealed at 550°C possess distinguished and exceptional thickness-dependent properties in comparison with the bulk, micro- and nano-structured WO3 synthesized at alternative temperatures.

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Зависимость топологии эпитаксиальных слоев PbSnTe:In от концентрации In

Журнал технической физики ◽

10.21883/jtf.2021.06.50876.326-20 ◽

2021 ◽

Vol 91 (6) ◽

pp. 1038

Author(s):

Д.В. Ищенко ◽

А.Н. Акимов ◽

И.О. Ахундов ◽

В.А. Голяшов ◽

А.Э. Климов ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Film Growth ◽

Epitaxial Films ◽

Ex Situ ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Tin Telluride ◽

Lead Tin Telluride ◽

Statistical Indicators

The topology of the surface of epitaxial films of lead tin telluride solid solution, including those with the addition of indium (Pb1-xSnxTe:In), grown on single-crystal BaF2 (111) substrates and a CaF2/BaF2 buffer layer on Si (111) was studied by atomic force microscopy. It is shown that the characteristic statistical indicators of the relief are due to the peculiarities of film growth and the mechanism of incorporation of Indians, the excess content of which was registered on the surface ex situ by X-ray photoelectron spectroscopy.

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Development of quasi-two-dimensional Nb2O5 nanoflakes with thickness-depended electro-chemical properties

Functional Materials Letters ◽

10.1142/s1793604715500071 ◽

2015 ◽

Vol 08 (01) ◽

pp. 1550007 ◽

Cited By ~ 5

Author(s):

Serge Zhuiykov ◽

Eugene Kats ◽

Tomoaki Sato ◽

Hiroshi Ikeda ◽

Norio Miura

Keyword(s):

Photoelectron Spectroscopy ◽

Sol Gel ◽

Chemical Properties ◽

Two Dimensional ◽

X Ray Diffraction ◽

Conductive Atomic Force Microscopy ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Structural Surface

Quasi-two-dimensional (Q2D) Nb 2 O 5 nanoflakes were synthesized by combined sol–gel/exfoliation method with the average thickness of 10–25 nm. Their structural, surface- and electro-chemical properties were closely studied and analyzed by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), conductive atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy techniques.

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Effects of Substrates Made of Noncrystal and Polycrystal on Photocatalytic Degradation of Basic Crystal Violet

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.574 ◽

2011 ◽

Vol 356-360 ◽

pp. 574-578

Author(s):

Xiao Jing Li ◽

Guan Jun Qiao ◽

Jin Ren Ni

Keyword(s):

Titanium Dioxide ◽

Photocatalytic Degradation ◽

Crystal Violet ◽

Photoelectron Spectroscopy ◽

Sol Gel ◽

X Ray Diffraction ◽

X Ray ◽

Force Microscopy ◽

Titanium Dioxide Films ◽

Atomic Force

Nanometer titanium dioxide films supported on glass, quartz, molybdenum, and aluminum were prepared by sol-gel method. The loaded titanium dioxide films were characterized by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and photocatalytic degradation of aqueous crystal violet. The titanium dioxide films supported on different substrates were all composed of polycrystalline nanoparticles, which belonged to single-phase anatase, and displayed different morphology after sintering at 773 K for 1 h. Some elements in the substrate made of noncrystal appeared on the surface of titanium dioxide films. The experiment about basic crystal violet degradation displayed the photocatalysis activity of titanium oxide films supported on the molybdenum was better.

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Preparation of Fe2+-Doped Silica Sol and its Application in Silk Modification

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.27.95 ◽

2014 ◽

Vol 27 ◽

pp. 95-101 ◽

Cited By ~ 3

Author(s):

Tie Ling Xing ◽

Wei Zhang ◽

Zhi Juan Liu ◽

Ren Cheng Tang ◽

Guo Qiang Chen

Keyword(s):

Photoelectron Spectroscopy ◽

Sol Gel ◽

Visible Spectrum ◽

Silica Sol ◽

Silk Fabric ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Particle Size Analyzer ◽

Water Repellence

Fe2+ doped silica sol was prepared using tetraethoxysilane (TEOS) as precursor, ethanol as solvent, hydrochloric acid as catalyst and aqueous solution of ferrous iron by sol-gel method under the follow condition: [TEO:n [EtO:n [H2=1:6:11, reacted at 70°C for 120 min with stirring. Through characterization of the prepared silica sol using particle size analyzer, X-ray diffraction (XRD) and UV-visible spectrum, it could be concluded that even and stable silica sol with nanosize and color was prepared. The prepared Fe2+ doped silica sol was applied in silk modification to endow silk with multifunctional properties and color. X-ray Photoelectron Spectroscopy (XPS) and atomic force microscopy (AFM) indicated that Fe2+-doped silica sol was treated onto the surface of silk fabric. The results showed that the Fe2+ doped silica sol treated silk had good flame retardance, water repellence and antistatic property. At the same time, silk fabric treated by the Fe2+-doped silica sol was also endowed with color.

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Graphene Oxide Chemistry Management via the Use of KMnO4/K2Cr2O7 Oxidizing Agents

Nanomaterials ◽

10.3390/nano11040915 ◽

2021 ◽

Vol 11 (4) ◽

pp. 915

Author(s):

Kseniya A. Shiyanova ◽

Maksim V. Gudkov ◽

Maxim K. Rabchinskii ◽

Liliia A. Sokura ◽

Dina Y. Stolyarova ◽

...

Keyword(s):

Graphene Oxide ◽

Photoelectron Spectroscopy ◽

Diffraction Method ◽

X Ray ◽

Force Microscopy ◽

Oxidizing Agents ◽

Fourier Transformed Infrared Spectroscopy ◽

Atomic Force ◽

Transmission Electron ◽

Fold Reduction

In this paper, we propose a facile approach to the management of graphene oxide (GO) chemistry via its synthesis using KMnO4/K2Cr2O7 oxidizing agents at different ratios. Using Fourier Transformed Infrared Spectroscopy, X-ray Photoelectron Spectroscopy, and X-ray Absorption Spectroscopy, we show that the number of basal-plane and edge-located oxygenic groups can be controllably tuned by altering the KMnO4/K2Cr2O7 ratio. The linear two-fold reduction in the number of the hydroxyls and epoxides with the simultaneous three-fold rise in the content of carbonyls and carboxyls is indicated upon the transition from KMnO4 to K2Cr2O7 as a predominant oxidizing agent. The effect of the oxidation mixture’s composition on the structure of the synthesized GOs is also comprehensively studied by means of X-ray diffraction, Raman spectroscopy, transmission electron microscopy, atomic-force microscopy, optical microscopy, and the laser diffraction method. The nanoscale corrugation of the GO platelets with the increase of the K2Cr2O7 content is signified, whereas the 10–100 μm lateral size, lamellar, and defect-free structure is demonstrated for all of the synthesized GOs regardless of the KMnO4/K2Cr2O7 ratio. The proposed method for the synthesis of GO with the desired chemistry opens up new horizons for the development of graphene-based materials with tunable functional properties.

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Investigation of the Effect of Uv-Assisted Oxidation and Nitridation of Hafnium Metal Films

MRS Proceedings ◽

10.1557/proc-780-y5.5 ◽

2003 ◽

Vol 780 ◽

Author(s):

C. Essary ◽

V. Craciun ◽

J. M. Howard ◽

R. K. Singh

Keyword(s):

Uv Radiation ◽

Photoelectron Spectroscopy ◽

Grazing Angle ◽

X Ray Diffraction ◽

Metal Thin Films ◽

X Ray ◽

Force Microscopy ◽

Si Substrates ◽

Atomic Force ◽

Silicon Interface

AbstractHf metal thin films were deposited on Si substrates using a pulsed laser deposition technique in vacuum and in ammonia ambients. The films were then oxidized at 400 °C in 300 Torr of O2. Half the samples were oxidized in the presence of ultraviolet (UV) radiation from a Hg lamp array. X-ray photoelectron spectroscopy, atomic force microscopy, and grazing angle X-ray diffraction were used to compare the crystallinity, roughness, and composition of the films. It has been found that UV radiation causes roughening of the films and also promotes crystallization at lower temperatures.Furthermore, increased silicon oxidation at the interface was noted with the UVirradiated samples and was shown to be in the form of a mixed layer using angle-resolved X-ray photoelectron spectroscopy. Incorporation of nitrogen into the film reduces the oxidation of the silicon interface.

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Curcumin delivery by modified biosourced carbon-based nanoparticles

Nanomedicine ◽

10.2217/nnm-2021-0225 ◽

2022 ◽

Author(s):

Hossein Danafar ◽

Marziyeh Salehiabar ◽

Murat Barsbay ◽

Hossein Rahimi ◽

Mohammadreza Ghaffarlou ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Free System ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Good Biocompatibility ◽

Drug Free ◽

Mcf 7 ◽

Carbon Based

Aim: To prepare a novel hybrid system for the controlled release and delivery of curcumin (CUR). Methods: A method for the ultrasound-assisted fabrication of protein-modified nanosized graphene oxide-like carbon-based nanoparticles (CBNPs) was developed. After being modified with bovine serum albumin (BSA), CUR was loaded onto the synthesized hybrid (labeled CBNPs@BSA–CUR). The structure and properties of the synthesized nanoparticles were elucidated using transmission electron microscopy (TEM), atomic force microscopy (AFM), ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS) methods. Results: CBNPs@BSA–CUR showed pH sensitivity and were calculated as controlled CUR release behavior. The drug-free system exhibited good biocompatibility and was nontoxic. However, CBNPs@BSA–CUR showed acceptable antiproliferative ability against MCF-7 breast cancer cells. Conclusion: CBNPs@BSA–CUR could be considered a highly promising nontoxic nanocarrier for the delivery of CUR with good biosafety.

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Effect of Surface Chemistry on Ruthenium Wet Etching

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.314.302 ◽

2021 ◽

Vol 314 ◽

pp. 302-306

Author(s):

Quoc Toan Le ◽

E. Kesters ◽

M. Doms ◽

Efrain Altamirano Sánchez

Keyword(s):

Surface Roughness ◽

Photoelectron Spectroscopy ◽

Etching Rate ◽

Wet Etching ◽

X Ray ◽

Force Microscopy ◽

Metal Free ◽

Atomic Force ◽

Different Types ◽

Effect Of Surface

Different types of ALD Ru films, including as-deposited, annealed Ru, without and with a subsequent CMP step, were used for wet etching study. With respect to the as-deposited Ru, the etching rate of the annealed Ru film in metal-free chemical mixtures (pH = 7-9) was found to decrease substantially. X-ray photoelectron spectroscopy characterization indicated that this behavior could be explained by the presence of the formation of RuOx (x = 2,3) caused by the anneal. A short CMP step applied to the annealed Ru wafer removed the surface RuOx, at least partially, resulting in a significant increase of the etching rate. The change in surface roughness was quantified using atomic force microscopy.

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