Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Wallis F. Calaway"'
Publikováno v:
Surface Science. 603:819-825
Polycrystalline Au was bombarded with 15 keV Ar + , and the resulting secondary neutral cluster yield distribution was measured by laser postionisation mass spectrometry. Neutral Au n clusters containing up to 20 atoms were observed. The yield of Au
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c5ef257aea61cc6730206caa7c38acc
https://doi.org/10.1016/j.susc.2009.01.027
https://doi.org/10.1016/j.susc.2009.01.027
Autor:
Wallis F. Calaway, Igor V. Veryovkin, J.F. Moore, Luke Hanley, Praneeth D. Edirisinghe, Michael J. Pellin
Publikováno v:
Applied Surface Science. 252:6723-6726
Chemical tags such as anthracene can be attached to a molecular analyte and serve as chromophores for 7.87 eV laser postionization by lowering the overall ionization potential of the tagged molecular complex. Fluorescein and tryptophan are demonstrat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d1737866fd32b67f20a4890500d7768
https://doi.org/10.1016/j.apsusc.2006.02.156
https://doi.org/10.1016/j.apsusc.2006.02.156
Autor:
Igor V. Veryovkin, Michael R. Savina, Hubert Gnaser, C. Emil Tripa, Michael J. Pellin, Wallis F. Calaway
Publikováno v:
International Journal of Mass Spectrometry. 245:61-67
Photocatalytic degradation reactions of methylene blue on nanocrystalline TiO2 (nc-TiO2) films were studied in situ by surface mass spectrometric techniques including secondary ion mass spectrometry, laser desorption direct ion mass spectrometry, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::229fbe700438442b893e07223cbe79dd
https://doi.org/10.1016/j.ijms.2005.07.003
https://doi.org/10.1016/j.ijms.2005.07.003
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :473-479
A new generation of time-of-flight mass spectrometers that implement ion sputtering and laser desorption for probing solid samples and can operate in regimes of laser post-ionization secondary neutral mass spectrometry and secondary ion mass spectrom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8e57b98c10db283ac52db7ccb7edd53
https://doi.org/10.1016/j.nimb.2004.01.105
https://doi.org/10.1016/j.nimb.2004.01.105
Autor:
J.F. Moore, Bruce V. King, Yuelin Li, Wallis F. Calaway, Stephen V. Milton, Michael J. Pellin, Igor V. Veryovkin, Mladen Petravic, John R Lewellen
Publikováno v:
Applied Surface Science. :962-966
A new time-of-flight (TOF) mass spectrometer incorporating post-ionization of sputtered neutral species with tunable vacuum ultraviolet (VUV) light generated by a free electron laser (FEL) has been developed. Capabilities of this instrument, called S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40f32e51192a2e7d5192a9b1a749119d
https://doi.org/10.1016/j.apsusc.2004.03.191
https://doi.org/10.1016/j.apsusc.2004.03.191
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :1051-1057
We have developed a computational approach to estimate the three-dimensional number density distribution of sputtered atoms above a solid target surface. This distribution is a function of pulsed primary ion beam characteristics, such as the time pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac7fef485bcef07422ac8d6955cabdd1
https://doi.org/10.1016/j.nimb.2004.01.211
https://doi.org/10.1016/j.nimb.2004.01.211
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 519:363-372
The method of accurate modeling of complex ion optical systems is presented. It combines using SIMION 3D © with external software generating input ion sets and processing results of ion trajectory simulations. This method was used to simulate time-o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af2d823a9cd4b9576e5148ab4cdd754e
https://doi.org/10.1016/j.nima.2003.11.174
https://doi.org/10.1016/j.nima.2003.11.174
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 519:353-362
A new time-of-flight instrument for quantitative surface analysis was developed and constructed at Argonne National Laboratory. It implements ion sputtering and laser desorption for probing analyzed samples and can operate in regimes of secondary neu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f905b835b1695e999de8626f646fbad8
https://doi.org/10.1016/j.nima.2003.11.173
https://doi.org/10.1016/j.nima.2003.11.173
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 519:345-352
In the present work, an advanced algorithm to simulate complex ion optical systems is described, and results of its application to time-of-flight mass spectrometers with laser post-ionization of secondary neutrals are presented. To examine ion optics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee1626f8ad1b21b5f582badc9e6a462e
https://doi.org/10.1016/j.nima.2003.11.172
https://doi.org/10.1016/j.nima.2003.11.172
Autor:
C. Emil Tripa, Michael R. Savina, Michael J. Pellin, Andrew M. Davis, Wallis F. Calaway, Igor V. Veryovkin
Publikováno v:
Geochimica et Cosmochimica Acta. 67:3215-3225
Isotopic analysis of heavy elements in individual stardust grains is important in testing and constraining theories of stellar nucleosynthesis. These analyses are challenging in that the grains are very small, the largest being perhaps a few microns
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3faa4d750b821fa80767c11a17601b4a
https://doi.org/10.1016/s0016-7037(03)00082-6
https://doi.org/10.1016/s0016-7037(03)00082-6