Inelastic electron tunneling spectroscop

Inelastic electron tunneling spectroscopic studies of alkoxysilanes adsorbed on alumina... 

Due to the high density of Rh atoms, no species of the form Rh(C0)2 were formed, however. This is expected to be the case on the (111) surface as well. Weak absorptions between 400 and 575 cm"l were seen and are indicative of metal-absorbate stretching and bending vibrations. Inelastic electron tunneling spectroscopic (IETS) measurements on alumina supported rhodium particles (47, 48, 49) add little new structural information... 

The experimental detection and quantification of surface species on in situ soil particles and other natural colloids is a difficult area of research because of sample heterogeneity, low surface concentrations, and the necessity of investigating the solid adsorbents in the presence of water. Unambiguous information can be obtained only with in situ surface spectroscopy, such as X-ray photoelectron (XPS), extended X-ray absorption fine structure (EXAFS), X-ray absorption near edge structure (XANES), inelastic electron tunnelling (lETS), and electron energy loss (EEL) spectroscopies. Recent advances in the development of non-invasive, in situ spectroscopic scanned-probe and microscopic techniques have been applied successfully to study mineral particles in aqueous suspensions (Hawthorne, 1988 Hochella and White, 1990 Bertsch and Hunter, 1998). 

In order to make meaningful physical measurements on monolayer and multilayer L-B films, it is essential that the films be characterized to determine the molecular structure, unformity of the film and layer-to-layer structural correlation. To probe the molecular structure, our research group has utilized a variety of spectroscopic techniques such as u.v.-visible spectroscopy, ATR-IR, wave-guide Raman, surface-plasmon wave Raman spectroscopy and inelastic electron tunneling. The spectroscopic techniques... 

Vibrational spectroscopic studies have been reported on clusters containing a ( M3-H) ligand and approximate metal-metal force constant calculations have been carried out on some small carbonyl clusters. A simple quantitative treatment of relative CO i.r. band intensities for [M3(CO)i2] (M=Ru and Os) has been presented together with a comparative i.r. and Raman study of the v(CO) region in [MaM 3 a (CO)i2] (M = Ru, M =Os, x=0, 1, 2, 3). It has been noted that the A 2 vibrational mode of the axial CO s in [Ru3(CO)i2] is identical to the collective CO stretching mode of CO adsorbed on Ru(001) and an inelastic electron-tunneling study of [Ru3(CO)i2] on aluminium oxide has been reported. ... 

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