Results 251 to 260 of about 121,814 (291)

TOF-SIMS investigations on weathered silver surfaces

Analytical and Bioanalytical Chemistry, 2007
Silver-coated quartz crystal microbalance (QCM) disks were treated under different environmental conditions (including changes in parameters such as relative humidity (%RH) and SO(2)/H(2)S content) in atmospheres of synthetic air and pure N(2) for 24 h in a weathering chamber. The corroded surfaces were subjected to depth profiling by a time of flight (
J, Schnöller, R, Wiesinger, C, Kleber, U, Hilfrich, M, Schreiner, H, Hutter   +5 more
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A ToF‐SIMS study of electrochemical pretreatments for polymers

Surface and Interface Analysis, 2000
Time-of-flight SIMS has been used to identify chemical changes caused to hexatriacontane and various hydrocarbon polymers after electrochemical treatment with nitric acid either alone or in the presence of silver ions. The spectra of polypropylene and high-density polyethylene treated in the presence of Ag2+ ions indicated the presence of hydroxyl ...
D. M. Brewis, D. Briggs, R. H. Dahm, I. Fletcher   +3 more
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Characterization of supported Nb catalysts by ToF-SIMS

Surface and Interface Analysis, 2000
A series of Nb2O5/TiO2 catalysts were prepared by incipient wetness impregnation of TiO2 with aqueous solutions of niobium oxalate/oxalic acid. Eight different catalysts with Nb loadings of 0.48–8.5 wt.% Nb were prepared. Analysis of the time-of-flight secondary ion mass spectrometry (ToF-SIMS) spectra of Nb2O5/TiO2 catalysts shows the presence of ...
Saeed B. Bukallah, Marwan Houalla, David M. Hercules   +2 more
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Calcium distributions in human hair by ToF-SIMS

Biochimica et Biophysica Acta (BBA) - General Subjects, 2003
Calcium distributions on internal and external surfaces of longitudinally sectioned hairs were analysed with Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS). Externally, calcium deposits were observed at the cuticle scale edges. Internal sections showed that the bulk of calcium exists within or just inside the cuticle layer.
I M, Kempson, W M, Skinner, P K, Kirkbride   +2 more
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TOF‐SIMS study of cystine and cholesterol stones

Journal of Mass Spectrometry, 2012
Two different human stones, cystine and cholesterol from the kidney and gall bladder, were examined by time‐of‐flight secondary ion mass spectrometry using Ga+ primary ions as bombarding particles. The mass spectra of kidney stone were compared with those measured for the standard compounds, cystine and cysteine.
C A A, Ghumman, A M C, Moutinho, A, Santos, A, Tolstogouzov, O M N D, Teodoro   +4 more
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Imaging TOF-SIMS analysis of oligonucleotide microarrays

The Analyst, 2002
Single strand thiolated oligonucleotide (25-mer) was printed onto chemically modified glass and silicon surfaces. Confirmation of the level of attachment attained in each case was effected through detection by conventional confocal fluorescence microscopy.
Larisa-Emilia, Cheran, Dajana, Vukovich, Michael, Thompson   +2 more
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Application of TOF-SIMS to microelectronics

Proceedings of 4th International Conference on Solid-State and IC Technology, 2002
Time-of-flight secondary ion mass spectrometry (TOF-SIMS) is a powerful tool for the study of surface chemical contamination. State-of-the-art TOF-SIMS instruments are capable of detection limits in the ppm regime and spatial resolution on the order of 200 nm.
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TOF-SIMS analysis of polymers

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Abstract When solid polymers are irradiated with heavy ions, atomic and molecular particles are ejected from the uppermost layers of the surface. A technique to determine the mass spectrum of the charged fraction of these particles is time-of-flight secondary-ion-mass spectrometry, TOF-SIMS.
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TOF-SIMS analysis of interplanetary dust

Earth and Planetary Science Letters, 1994
Abstract Three interplanetary dust particles (IDPs) collected in the stratosphere were analyzed with imaging time-of-flight secondary ion mass spectrometry (TOF-SIMS) to investigate the elemental distribution within these particles at high lateral resolution and to demonstrate the abilities of this new technique for the analysis of IDPs and other ...
Thomas Stephan, Elmar K. Jessberger, Wolfgang Klöck, Harald Rulle, Joachim Zehnpfenning   +4 more
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Chemistry of ZDDP Tribofilm by ToF-SIMS

Tribology Letters, 2004
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) (static and dynamic modes) has been applied to chemical characterization of zinc dithiophosphate additives tribofilm. Main result concerns insights in the spatial distribution of phosphate and sulphide species in the whole tribofilm thickness, at a sub-micrometer scale.
Minfray, Clotilde, Martin, J.M., Barros, M.I. De, Mogne, T. Le, Kersting, R., Hagenhoff, B.   +5 more
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