X-ray photoelectron spectroscopy analyses of oxide-masked organic polymers etched in high density plasmas using SO[sub 2]/O[sub 2] gas mixtures

1999 ◽  
Vol 17 (4) ◽  
pp. 1406 ◽  
Author(s):  
C. Monget ◽  
O. Joubert
Keyword(s):  
Photoelectron Spectroscopy ◽  
Gas Mixtures ◽  
High Density ◽  
Organic Polymers ◽  
X Ray

scholarly journals Enhanced Water Resistance of Recycled Newspaper/High Density Polyethylene Composite Laminates via Hydrophobic Modification of Newspaper Laminas

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 421
Author(s):  
Binwei Zheng ◽  
Weiwei Zhang ◽  
Litao Guan ◽  
Jin Gu ◽  
Dengyun Tu ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Photoelectron Spectroscopy ◽  
Composite Laminates ◽  
High Density Polyethylene ◽  
Water Resistance ◽  
Laminated Composite ◽  
High Strength ◽  
High Water ◽  
High Density ◽  
X Ray

A high strength recycled newspaper (NP)/high density polyethylene (HDPE) laminated composite was developed using NP laminas as reinforcement and HDPE film as matrix. Herein, NP fiber was modified with stearic acid (SA) to enhance the water resistance of the NP laminas and NP/HDPE composite. The effects of heat treatment and SA concentration on the water resistance and tensile property of NP and composite samples were investigated. The chemical structure of the NP was characterized with X-ray diffractometer, X-ray photoelectron spectroscopy and attenuated total reflectance Fourier transform infrared spectra techniques. The surface and microstructure of the NP sheets were observed by scanning electron microscopy. An expected high-water resistance of NP sheets was achieved due to a chemical bonding that low surface energy SA were grafted onto the modified NP fibers. Results showed that the hydrophobicity of NP increased with increasing the stearic acid concentration. The water resistance of the composite laminates was depended on the hydrophobicity of the NP sheets. The lowest value of 2 h water absorption rate (3.3% ± 0.3%) and thickness swelling rate (2.2% ± 0.4%) of composite were obtained when the SA concentration was 0.15 M. In addition, the introduction of SA can not only enhance the water resistance of the composite laminates, but also reduce the loss of tensile strength in wet conditions, which shows potential in outdoor applications.

X-Ray Photoelectron Spectroscopy Study of Pt-Oxide Thin Films Deposited by Reactive Sputtering Using O2/Ar Gas Mixtures

1999 ◽  
Vol 38 (Part 1, No. 8) ◽  
pp. 4872-4875 ◽  
Author(s):  
Min-Cherl Jung ◽  
Hyeong-Do Kim ◽  
Moonsup Han ◽  
William Jo ◽  
Dong Chun Kim
Keyword(s):  
Thin Films ◽  
Photoelectron Spectroscopy ◽  
Reactive Sputtering ◽  
Gas Mixtures ◽  
Spectroscopy Study ◽  
Oxide Thin Films ◽  
X Ray ◽  
Ar Gas

scholarly journals Design of Metal-Organic Polymers MIL-53(M3+): Preparation and Characterization of MIL-53(Fe) and Graphene Oxide Composite

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1281
Author(s):  
Quang K. Nguyen ◽  
Galina M. Kuz’micheva ◽  
Evgeny V. Khramov ◽  
Roman D. Svetogorov ◽  
Ratibor G. Chumakov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Structural Characteristics ◽  
Crystal Chemical ◽  
Organic Polymers ◽  
Crystal Chemical Analysis ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Composition And Structure ◽  
Metal Organic

This article presents a crystal chemical analysis, generalization, and systematization of structural characteristics of metal-organic polymers MIL-53(M3+) with M = Al, Cr, Ga, and Fe. The division of the MIL-53(M3+) structures into a morphotropic series was performed, which made it possible to predict the formation of new compounds or solid solutions with the corresponding composition and structure. The change in the symmetry of MIL-53(M3+) and the causes of polymorphs formation are explained on the basis of crystal chemical rules. The efficiency of the revealed regularities in the structural characteristics of the MIL-53(M3+) phases were experimentally confirmed for MIL-53(Fe) and composite MIL-53(Fe)/GO (GO-graphene oxide) by several methods (powder X-ray, X-ray absorption, and photoelectron spectroscopy). For the first time, different coordination numbers (CN) (CNFe = 4.9 for MIL-53(Fe)—two types of coordination polyhedra with CNFe = 6 and CNFe = 4; CNFe = 4 for MIL-53 (Fe3+)/GO) and the formal charges (FC) of iron ions (variable FC of Fe (2+δ)+ in MIL-53(Fe3+) and Fe2+ in MIL-53(Fe3+)/GO) were found. These experimental data explain the higher photocatalytic activity of MIL-53(Fe3+)/GO in photo-Fenton reactions—RR195 decomposition.

Chemical Deposition Method for Synthesis of Pt-TiO2 Composite Nanotubes with Photoelectrochemical Activity

2012 ◽  
Vol 465 ◽  
pp. 276-282
Author(s):  
Zhong Hui Gao ◽  
Zhen Duo Cui ◽  
Xian Jin Yang
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Chemical Deposition ◽  
Pt Nanoparticles ◽  
High Density ◽  
Deposition Method ◽  
Photoelectrochemical Activity ◽  
X Ray ◽  
Transmission Electron ◽  
Chemical Deposition Method

Pt nanoparticles were successfully assembled in self-organized TiO2 nanotubes by a chemical deposition method. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were used for characterizing the surface morphology and phase composition. Photocurrent response activity was measured. Different morphology of Pt-TiO2 NTs exhibited different photocurrent generation efficiency. High density Pt nanoparticles depositing on TiO2 NTs decreased the photocurrent of Pt-TiO2 electrodes. It was because the high density Pt nanoparticles could become the recombination centers of photoelectrons and holes.

Inductively Coupled Plasma Reactive Ion Etching of Ge-SiO2 and SiON Using C2F6 and NF3-Based Gas Mixtures

2007 ◽  
Vol 124-126 ◽  
pp. 503-506
Author(s):  
N.J. Kim ◽  
S.Y. Lee ◽  
G.K. Lee ◽  
J.H. Moon ◽  
Byung Teak Lee
Keyword(s):  
Photoelectron Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Etch Rate ◽  
Reactive Ion Etching ◽  
Gas Mixtures ◽  
Smooth Surfaces ◽  
Ion Etching ◽  
X Ray ◽  
Inductively Coupled ◽  
Silica Glasses

Inductively coupled plasma reactive ion etching of Ge doped silica glasses and SiON was investigated, using C2F6- and NF3-based gas mixtures. Mesas with smooth surfaces and vertical sidewalls were obtained, with a maximum etch rate of about 310nm/min in the case of C2F6 RIE of Ge-SiO2 and 280 nm/min in the case of SiON. The NF3 plasma yielded slightly higher etch rate, although sloped sidewalls were obtained. Results of the X-ray photoelectron spectroscopy showed little contamination on the etched surfaces.

scholarly journals Synthesis of Boron Nanosheets in Copper Medium

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Shuo Zhao ◽  
Yuying Wu ◽  
Bo Zhou ◽  
Xiangfa Liu
Keyword(s):  
Raman Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
High Density ◽  
Growth Processes ◽  
Interesting Phenomenon ◽  
Mechanical Exfoliation ◽  
X Ray ◽  
Novel Method ◽  
Boron Sheets ◽  
Bulk Structures

AbstractBoron has a tendency to form bulk structures due to its unique electron-deficient property, so it’s hard for boron to form sheets in large quantities. Here, we report a novel method for the preparation of boron nanosheets in large quantities by copper medium. The method mainly includes mechanical exfoliation, recombination and extraction. A large number of boron nanosheets with a height of below 6 nm have been prepared in this work. X-ray photoelectron spectroscopy and Raman spectroscopy results confirmed that the nanosheets possess the characteristics of α-rhombohedra boron and β-rhombohedra boron with a high content of boron. Hexagonal and rhombic sheets have been observed and two different growth processes are revealed successfully, which are also the basic structures of boron nanosheets. An interesting phenomenon also have been discovered that high density nanotwins exist in β-Rhombohedra boron sheets and it might stimulate more interest in growth of nanomaterials.

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