Results 111 to 120 of about 22,003 (164)

Methods for Generating Protein Molecular Ions in ToF-SIMS

Langmuir, 2004
One of the greatest challenges in mass spectrometry lies in the generation and detection of molecular ions that can be used to directly identify the protein from the molecular weight of the molecular ion. Typically, proteins are large (MW > 1000), nonvolatile, and/or thermally labile, but the vaporization process produced by many mass spectrometry ...
McArthur, Sally L., Vendettuoli, Marie C., Ratner, Buddy D., Castner, David G.   +3 more
openaire   +3 more sources

A fast sparse iterative method (SIM) for method of moments

Proceedings of IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting, 2002
The sparse iterative method (SIM) provides a faster solution to method of moments (MoM) matrix equations than does LU-decomposition with forward and back substitution. The SIM produces a solution with computational time proportional to N/sup 2/, as opposed to the N/sup 3/ time dependence associated with LU-decomposition.
A.P.C. Fourie, D.C. Nitch
openaire   +1 more source

New SIMS method to characterize hydrogen in polysilicon films

Journal of Vacuum Science & Technology B, 2022
A new analysis protocol for profiling the hydrogen (H) concentration depth distributions in polysilicon (poly-Si) thin films on Si oxide was developed by using secondary ion mass spectrometry (SIMS). Traditional SIMS determination of H concentrations in poly-Si films is to monitor and collect the atomic H−, but this analysis method presents some ...
Xue-feng Lin, Agi Fucsko, Kari Noehring, Elaine Gabriel, Adam Regner, Scott York, David Palsulich   +6 more
openaire   +1 more source

The infinite velocity method: A new method for SIMS quantification

Surface and Interface Analysis, 1994
Abstract Twelve elements spanning a mass range of 197 atomic mass units from five standard reference materials and three implant materials were analysed to ascertain the validity of a new method, termed the infinite velocity method, for quantifying the negative monatomic secondary ion emissions resulting from Cs‐bombarded surfaces ...
P. A. W. Van Der Heide, Min Zhang, G. R. Mount, N. S. McIntyre   +3 more
openaire   +1 more source

SIMS and RBS analysis of leached glass: Reliability of RSF method for SIMS quantification

Journal of Materials Science: Materials in Electronics, 1996
The reliability of the relative sensitivity factor (RSF) approach for secondary ion mass spectrometry (SIMS) quantification of the leached layers on glass was investigated by measuring comparable samples of glass with SIMS and RBS (Rutherford backscattering spectrometry). The RSF factors were calculated using the nominal bulk compositions.
A.A. Salem, G. Stingeder, M. Grasserbauer, M. Shreiner, K.H. Giessler, F. Rauch   +5 more
openaire   +1 more source

Lubricant evaluation method for FDBs using TOF-SIMS

Microsystem Technologies, 2002
With the increase in recording density and data transfer rate of hard disk drive (HDD), fluid dynamic bearing (FDB) motors have been introduced due to their silence and high rotation accuracy. Although lubricant plays a major role in the development of FDB motors, it is extremely difficult to perform thorough evaluation because the quantity of ...
K. Matsuoka, S. Obata, F. Toujou
openaire   +1 more source

A Spectral Integral Method (SIM) for Layered Media

IEEE Transactions on Antennas and Propagation, 2006
A spectral integral method is presented for electromagnetic scattering from dielectric and perfectly electric conducting (PEC) objects with a closed boundary embedded in a layered medium. Two-dimensional layered medium Green's functions are computed adaptively by using Gaussian quadratures. The singular terms in the Green's functions and the non-smooth
E. Simsek, J. Liu, Q.H. Liu
openaire   +1 more source

SIMS methods in reactivity studies on metal oxides

Inorganica Chimica Acta, 1995
Abstract A SIMS (secondary ion mass spectrometry) study of IrO2/RuO2/TiO2 mixed oxide films and PbO2 films synthesized by thermal and electrochemical processes, respectively, reveals interesting cluster ions that may be very important in evaluating component reactivity between different metal oxides and with trapped ions or neutral particles present ...
DAOLIO S., FACCHIN B., PAGURA C., GELOSI S., DE BATTISTI, Achille   +4 more
openaire   +1 more source

Investigation of hydrogen sensitivity of SIMS method

Surface and Interface Analysis, 1992
Abstract Generally, papers in which hydrogen detection by the SIMS method is described do not touch upon the sensitivity and background level of hydrogen during the SIMS analysis. Problems connected with the detection and sensitivity of hydrogen in our SIMS equipment are discussed in this paper.
openaire   +1 more source

Method for Macromolecular Colocalization Using Atomic Recombination in Dynamic SIMS

The Journal of Physical Chemistry B, 2008
Localizing two or more components of assemblies in biological systems requires both continued development of fluorescence techniques and invention of entirely new techniques. Candidates for the latter include dynamic secondary ion mass spectrometry (D-SIMS).
Legent, G., Delaune, A., Norris, V., Delcorte, A., Gibouin, David, Lefebvre, Fabrice, Misevic, G., Thellier, M., Ripoll, C.   +8 more
openaire   +3 more sources