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Tuesday, May 5, 2020 | History

4 edition of Laser Photoionization and Desorption Surface Analysis Techniques (Spi Proceedings, Vol 1208) found in the catalog.

Laser Photoionization and Desorption Surface Analysis Techniques (Spi Proceedings, Vol 1208)

by Nicolas S. Nogar

  • 339 Want to read
  • 32 Currently reading

Published by SPIE-International Society for Optical Engine .
Written in English

    Subjects:
  • Holography,
  • Optical Engineering,
  • Optics,
  • Science/Mathematics

  • The Physical Object
    FormatPaperback
    ID Numbers
    Open LibraryOL11392640M
    ISBN 100819402494
    ISBN 109780819402493

    As a consequence, alternative surface analysis techniques that focus on photoionization of neutral desorbates have been developed, including desorption atmospheric pressure photoionization (DAPPI. A plethora of AMS methods surfaced shortly after the introduction of two pioneer techniques, desorption electrospray ionization (DESI) in by Cooks et al, [1] and direct analysis in real time.

    mass spectrometry or laser desorption electron impact. Techniques that rely on different ionization mechanisms, e.g., chemical ionization (desorption atmospheric pressure chemical ionization, DAPCI),9 metastables in plasma (direct analysis in real time, DART),10 and photoionization (desorption atmo-. Soft laser desorption is laser desorption of large molecules that results in ionization without fragmentation. "Soft" in the context of ion formation means forming ions without breaking chemical bonds. "Hard" ionization is the formation of ions with the breaking of bonds and the formation of fragment ions.

      Multiphoton resonance excitation has been employed to ionize neutral atoms and molecules desorbed from surfaces bombarded by 5 keV Ar+ ion beams. By positioning a laser beam above the target it is possible to image the ions onto a microchannelplate detector and to obtain energy and angle-resolved distributions. These distributions may be compared directly to classical dynamics Author: Roya Maboudian, M. El-Maazawi, Z. Postawa, C. T. Reimann, Geoffrey P. Malafsky, D. M. Hrubowchak, Ma. Redefines laser ionization's place in analytical chemistry along with the discovery of several new techniques and their promising applications including laser-solid interaction which is used in diamond synthesis, high temperature superconductor preparation, desorption of large biomolecules and sampling of solids for chemical analysis.


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Laser Photoionization and Desorption Surface Analysis Techniques (Spi Proceedings, Vol 1208) by Nicolas S. Nogar Download PDF EPUB FB2

Get this from a library. Laser photoionization and desorption surface analysis techniques: JanuaryLos Angeles, California. [Nicolas S Nogar. adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A.

While elemental analysis of surfaces has progressed dramatically over the past ten years, quantitative molecular surface analysis remains difficult. This is particularly true in the analysis of complex materials such as polymers and rubbers which contain a wide compliment of additives and pigments to enhance their material characteristics.

For mass spectrometric analysis the difficulty is two Cited by: 1. Recent developments have been made in the novel surface analysis technique, surface analysis by laser ionization, in the area of quantitative surface and material elemental analysis.

A breakthrough made during used high intensity, high-order, nonresonant, multiphoton ionization to saturate photoionization of all elements involved and thus achieved uniform detection by: 2. Laser Photoionization Spectroscopy discusses the features and the development of photoionization technique.

This book explores the progress in the application of lasers, which improve the characteristics of spectroscopic methods. Organized into 12 chapters, this book starts with an overview of the fundamentals of the method for atoms and Edition: 1.

Laser Photoionization Spectroscopy discusses the features and the development of photoionization technique. This book explores the progress in the application of lasers, which improve the characteristics of spectroscopic methods.

Surface-assisted laser desorption/ionization is a soft laser desorption technique used for mass spectrometry analysis of biomolecules, polymers, and small organic molecules. In its first embodiment Koichi Tanaka used a cobalt/glycerol liquid matrix and subsequent applications included a graphite/glycerol liquid matrix as well as a solid surface of porous silicon.

At present laser desorption/ionization methods. A method of laser-induced desorption mass spectrometry (LIDMS) has been used to examine the dynamics of Cd(CH 3) 2 chemisorption and spontaneous decomposition on n type Si() with native surface oxide, the pathways and efficiencies of the adsorbate desorption due to the absorption of the XeCl.

laser radiation by silicon. The extremely fast processes in the adlayer re caused by the Author: Vladimir N. Varakin, Anatoly M. Panesh, Alexander P. Simonov. Laser desorption/ionization (LDI) techniques were firstly developed in the early seventies but only in the late eighties, with the introduction of matrix-assisted laser desorption/ionization (MALDI), they became an established method for the mass spectrometry of macromolecular compounds.

The role of matrix is to absorb UV laser radiation and to give the Cited by: Laser induced molecular desorption which is mediated by optically generated substrate carriers is considered.

State-specific diagnostics are combined with desorption-laser wavelength dependence studies to clarify the excitation and desorption dynamics : Richard R. Cavanagh, S. Buntin, Lee J. Richter, David S. King. Laser desorption–ionization (LDI) of organic compounds as adsorbates on solids has been used with IMS where the entire process of ion formation and characterization occurred at atmospheric pressure.

Moreover, PAHs were among the first compounds characterized as films deposited on glass, ceramic and metal, substrates. Spectra were obtained for PAHs with few indications of interferents or fragmentation and without refined drift by: Laser photoionization spectroscopy.

Letokhov analytical anthracene Antonov atomic beam autoionization Bekov benzene buffer gas concentration cross section decay dependence desorption detector dye laser effect efficiency electric field elements energy flux energy levels Laser spectroscopy Photoionization Science / Spectroscopy.

This paper describes two-laser ion trap mass spectrometry (L2ITMS) for the analysis of organic, polymeric, and biological surfaces.

L2ITMS uses one laser to desorb intact molecules from a surface, a second laser for photoionization, and an ion trap for single or tandem mass spectrometric analysis.

We demonstrate the capabilities of this instrument by performing laser desorption/photoionization Cited by:   Laser-induced acoustic desorption coupled to microplasma-based atmospheric pressure photoionization (LIAD-APPI) using a nebulized sweep jet to aid in dopant introduction and ion transmission has been applied to the analysis of model, apolar lipid compounds.

Specifically, several sterols, sterol esters, and triacylglycerols were detected using dopants such as anisole and : Kevin Benham, Facundo M. Fernández, Thomas M. Orlando. Abstract. Deuterated propylene (C 3 D 6) chemisorption and decomposition on the Si()-(2x1) surface has been studied in ultrahigh vacuum by using laser induced thermal desorption (LITD) and temperature programmed desorption techniques (TPD).Propylene was found to adsorb molecularly at K and to remain as an undecomposed molecular adsorbate up to approximately : Kumar Sinniah, Michael G.

Sherman, John T. Yates, Kenneth C. Janda. Multiphoton ionization spectroscopy in surface analysis and laser desorption mass spectrometry. Mikrochimica Acta(), DOI: /BF Chun He, Christopher H Becker. Surface analysis by laser by:   Matrix‐assisted laser desorption ionization (MALDI) mass spectrometry (MS) is an excellent analytical technique for the rapid and sensitive analysis of macromolecules (> Da), such as peptides, proteins, nucleic acids, and synthetic by: Ion sputtering of samples followed by laser resonance ionization of neutral atoms and mass spectrometry, is a very powerful method for trace and surface analysis.

Desorption atmospheric pressure photoionization-mass spectrometry (DAPPI-MS) is a versatile surface analysis technique for a wide range of analytes, especially for neutral and non-polar analytes. This paper examines the analytical capabilities and applications of Laser Ablation Microprobe Mass Spectrometry (LAMMS).

The technique and instrumentation will be described along with the application of LAMMS to investigate dopant lateral diffusion problems in insulating and noninsulating : Lou Ann Heimbrook. 1 July Ultraviolet laser-induced desorption of molecules and ions from thin metal films.

Mo Yang Mo Yang, Jeffrey Millard, and James P. Reilly "Ultraviolet laser-induced desorption of molecules and ions from thin metal films", Proc.

SPIELaser Photoionization and Desorption Surface Analysis Techniques, (1 July ); https: Author: Mo Yang, Jeffrey Millard, James P. Reilly.in the analysis of TOF-SIMS data. Laser desorption combined with photoionization may provide a significant improvement over TOF-SIMS, but little data has been collected comparing the relative efficacy of these processes.

When such comparisons have been done, they usually have not been supported by independent surface : J.L. Trevor, L. | Hanley, M.J. Pellin, K.R. Lykke.Laser induced molecular desorption which is mediated by optically generated substrate carriers is considered. State-specific diagnostics are combined with desorption-laser wavelength dependence studies to clarify the excitation and desorption dynamics involved.

Results from NO desorption from both metallic and semiconductor substrates are presented, along with theoretical models of the Author: Richard R.

Cavanagh, S. A. Buntin, Lee J. Richter, David S. King.