(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

2002 ◽  
Vol 12 (10) ◽  
pp. 713-718 ◽  
Author(s):  
R. Buller ◽  
H. Cohen ◽  
E. Minkin ◽  
R. Popovitz-Biro ◽  
E. Lifshitz ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Organic Matrix ◽  
X Ray

Quantification of the toxic hexavalent chromium content in an organic matrix by X-ray photoelectron spectroscopy (XPS) and ultra-low-angle microtomy (ULAM)

2017 ◽  
Vol 396 ◽  
pp. 665-671 ◽  
Author(s):  
Theresia Greunz ◽  
Hubert Duchaczek ◽  
Raffaela Sagl ◽  
Jiri Duchoslav ◽  
Roland Steinberger ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Photoelectron Spectroscopy ◽  
Chromium Content ◽  
Organic Matrix ◽  
X Ray

scholarly journals Preparation and characterization of block copolymers containing cinnamate groups with end-capped ZnO

2013 ◽  
Vol 11 (9) ◽  
pp. 1492-1504 ◽  
Author(s):  
Florentina Jitaru ◽  
Tinca Buruiana ◽  
Gabriela Hitruc ◽  
Emil Buruiana
Keyword(s):  
Photoelectron Spectroscopy ◽  
Uv Spectroscopy ◽  
Organic Matrix ◽  
Proton Nuclear Magnetic Resonance ◽  
Broad Emission Band ◽  
Zno Nanoparticle ◽  
Resonance Fluorescence ◽  
X Ray ◽  
Transmission Electron ◽  
Poly Ethylene

AbstractAbstract ZnO-poly(2-cinnamoyloxyethyl methacrylate) and ZnO-poly(2-cinnamoyloxyethyl methacrylate)-b-poly[(poly(ethylene glycol) methyl ether methacrylate] have been prepared by atom transfer polymerization initiated through a 2-bromoisobutyryl or bromoethyl group linked onto the ZnO nanoparticle surface (ZnO-BIBB, ZnO-BEI). The structure and morphology of the hybrids were characterized using Fourier transform infrared, proton nuclear magnetic resonance, fluorescence and UV spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron (TEM) and atomic force microscopy. The existence of nanoparticles with diameters varying between 40 and 100 nm was evident in the TEM images of the pure ZnO, ZnO-PCEMA-Br-2 and the diblock copolymer. Under an excitation of 340 nm, these materials exhibit a broad emission band at around 390 nm, which was associated with the presence of ZnO in the organic matrix. Graphical abstract

Electron Microscopy and X-Ray Photoelectron Spectroscopy of Oxygen Plasmaetched Bacterial Spores and Cells

1976 ◽  
Vol 34 ◽  
pp. 134-135
Author(s):  
Richard S. Thomas ◽  
Merle M. Millard ◽  
René Scherrer
Keyword(s):  
Photoelectron Spectroscopy ◽  
Organic Matrix ◽  
Structural Features ◽  
Mineral Elements ◽  
Bacterial Spores ◽  
Electron Microscopic ◽  
X Ray ◽  
Culture Cells ◽  
Combined Application ◽  
Morphological Studies

Low-temperature, oxygen plasma etching (OPE) is a useful technique in electron-microscopic (EM) morphological studies of mineral-containing organic polymers and biological structures. OPE gently and cleanly etches away the organic matrix at the surface of the specimen, leaving behind oxides and salts of exposed mineral elements. X-ray photoelectron spectroscopy (XPS) is widely used for macroscopic chemical analysis of the surfaces of polymers and inorganic specimens. The XPS signal originates from a surface depth of less than 100 Å. Combined application of the three techniques, OPE, EM and XPS to dispersible, macroscopic specimens which are microscopically homogeneous should allow correlation of fine structural features with surface and subsurface chemical composition. The present, preliminary study explores this possibility on bacterial spores and cells. Further details, and similar studies on tissue culture cells will be reported elsewhere.

In situ Synthesis of Nickel Ferrite Nanoparticle/organic Hybrid

2005 ◽  
Vol 20 (6) ◽  
pp. 1590-1596 ◽  
Author(s):  
Satoshi Nakamura ◽  
Wataru Sakamoto ◽  
Toshinobu Yogo
Keyword(s):  
Photoelectron Spectroscopy ◽  
Nickel Ferrite ◽  
Oxide Particle ◽  
Organic Matrix ◽  
X Ray ◽  
Organic Hybrid ◽  
Ferrite Particle ◽  
Ferrite Nanoparticle ◽  
Hydrolysis Conditions

A NiFe2O4 particle/organic hybrid was synthesized in situ from iron-organic and nickel organic compounds below 100 °C. A mixture of nickel (II) acetylacetonate (NA) and iron (III) 3-allylacetylacetonate (IAA) was hydrolyzed and polymerized yielding spinel oxide particle/oligomer hybrid. X-ray diffraction analysis revealed that the crystallinity of spinel particles was dependent upon the hydrolysis conditions of NA-IAA. Nanocrystalline nickel ferrite particles around 10 nm were uniformly dispersed in the organic matrix. The formation of nickel ferrite was confirmed by energy-dispersive x-ray and x-ray photoelectron spectroscopy. The saturation magnetization of hybrid increased with increasing water amount for hydrolysis. Nano-sized nickel ferrite particle/organic hybrid showed a BH curve with no remanence above 75 K. The magnetization versus H/T curves at 300, 200, and 75 K were superimposed on the same curve and satisfied the Langevin equation. The remanent magnetization and coercive field of the hybrid were 7.4 emu/g and 460 Oe, respectively, at 5 K.

Synthesis and field-responsive properties of SrTiO3 nanoparticle/polymer hybrid

2009 ◽  
Vol 24 (7) ◽  
pp. 2221-2228 ◽  
Author(s):  
Junji Umeda ◽  
Wataru Sakamoto ◽  
Toshinobu Yogo
Keyword(s):  
Strontium Titanate ◽  
Photoelectron Spectroscopy ◽  
Silicone Oil ◽  
Organic Matrix ◽  
Titanium Isopropoxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polymer Hybrid ◽  
Hydrolysis Conditions ◽  
Stress Dependent

Nanocrystalline strontium titanate (SrTiO3) particle/polymer hybrid was synthesized from metal–organics and 2-(methacryloyloxy)ethyl maleate (MMEM). SrTiO3 precursor was prepared from strontium isopropoxide and titanium isopropoxide in 2-methoxyethanol. Nanocrystalline SrTiO3 particle/poly-MMEM hybrid was formed by hydrolysis followed by reaction with MMEM. The crystallinity of SrTiO3 particles depended on the amount of water for hydrolysis. The nanocrystalline particles were identified to be strontium titanate by x-ray diffraction. Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy showed the presence of the chemical bond between SrTiO3 particles and the organic matrix. The fluid consisting of SrTiO3 particle/poly-MMEM and silicone oil revealed a yield stress dependent on various conditions, such as hydrolysis conditions and applied field. The hybridization was found to have a pronounced effect on the electrorheological properties of the nanoparticle/polymer-based system.

Two dimensional Sr silicate grown on Si(001) studied using X-ray Photoelectron Spectroscopy

2006 ◽  
Vol 132 ◽  
pp. 87-90
Author(s):  
M. El Kazzi ◽  
G. Delhaye ◽  
S. Gaillard ◽  
E. Bergignat ◽  
G. Hollinger
Keyword(s):  
Photoelectron Spectroscopy ◽  
Two Dimensional ◽  
X Ray

BONDS IN AMORPHOUS Nb1-xSixSTUDIED BY X-RAY EMISSION AND X-RAY PHOTOELECTRON SPECTROSCOPY

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-1025-C9-1028 ◽  
Author(s):  
W. ZAHOROWSKI ◽  
A. SIMUNEK ◽  
G. WIECH ◽  
K. SÖLDNER ◽  
R. KNAUF ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray

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

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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