Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Paul R. Kemper"'
Publikováno v:
International Journal of Mass Spectrometry. 441:19-24
Reaction of ground-state Ce+ (5d24f1) with deuterium in a reaction cell at a pressure of 1.5–4.0 Torr and temperatures ranging from approximately 265–515 K is studied. Rate constants for formation of CeD2+ are acquired and vary from approximately
Publikováno v:
International Journal of Mass Spectrometry. 434:108-115
A new instrument combining a two meter long ion mobility drift tube fabricated of resistive glass with a high-resolution time-of-flight (TOF) mass spectrometer is presented and new features are discussed in detail. Ions are formed by electrospray ion
Autor:
Manuel J. Manard, Paul R. Kemper
Publikováno v:
International Journal of Mass Spectrometry. 423:54-58
Reduced mobilities for ground-state electronic configurations of the complete lanthanide series of cations, excluding promethium, have been measured. These values were obtained using an ion mobility mass spectrometer that utilizes a 2 m drift tube to
Autor:
Paul R. Kemper, Manuel J. Manard
Publikováno v:
International Journal of Mass Spectrometry. 412:14-19
Reduced mobilities for ground-state electronic configurations of Eu+, Gd+, Yb+, and Lu+ have been measured using a high-resolution ion mobility mass spectrometer. The instrument uses a 2 m drift tube to generate high-resolution ion mobility data. Lan
Autor:
Paul R. Kemper, Michael T. Bowers, Steven K. Buratto, Scott P. Price, Zhenpeng Hu, Vladimir Shapovalov, Xiao Tong, Claron J. Ridge, Horia Metiu
Publikováno v:
Surface Science. 605:972-976
We use ultra-high vacuum scanning tunneling microscopy (UHV–STM) to probe, at the atomic level, the structure of mass-selected isolated V 1 , V 2 , VO and VO 2 clusters deposited on rutile TiO 2 (110) by ion soft landing. All four species interact
Publikováno v:
International Journal of Mass Spectrometry. 287:46-57
Ion mobility spectroscopy (IMS) coupled with mass spectrometry (MS) has become a key tool for investigation of molecular conformation and aggregation. The technique has been widely applied to both biological and inorganic materials. The ability to di
Autor:
Paul R. Kemper, Michael T. Bowers, Yigal Lilach, Steven K. Buratto, Lauren Benz, Andrei Kolmakov, Xiao Tong, Manuel J. Manard, Horia Metiu
Publikováno v:
International Journal of Mass Spectrometry. 254:202-209
An instrument designed to investigate the chemical behavior of size selected metal clusters on semiconductor surfaces is described. The clusters are formed using laser vaporization, mass selected in a magnetic mass analyzer and deposited on TiO2 subs
Publikováno v:
International Journal of Mass Spectrometry. :252-262
Sequential bond dissociation energies (BDEs) and association entropies for the attachment of C 2 H 4 ligands to ground-state Ag m + ( m = 3–13) clusters and for the attachment of C 3 H 6 ligands to ground-state Ag m + ( m = 3–9) clusters have bee
Publikováno v:
The Journal of Physical Chemistry B. 110:663-666
We have deposited Au atoms on the surface of titania without sintering or surface damage. Mass-selected Au+ atoms were deposited from the gas phase at room temperature with kinetic energies from3 to 190+/-3.5 eV. Scanning tunneling microscopy reveals
Publikováno v:
International Journal of Mass Spectrometry. 241:109-117
Temperature-dependent equilibrium methods were used to measure sequential association energies and entropies for the attachment of C 2 H 4 and C 3 H 6 ligands to ground-state Ag + ( 1 S, 4d 10 ) and Ag 2 + ( 2 Σ g , 4d 20 σ(5s) 1 ). Experimental bo