Pyridine adsorption and acid/base complex formation on ultrathin films of gamma-Al(sub 2)O(sub 3) on NiAl(100)

Article Abstract:

It is shown that vibrational spectroscopy coupled with pyridine adsorption can distinguish between surface hydroxyl groups, to which it associates, by hydrogen-bond formation. The observations revealed that while most of the pyridine desorbs from the gamma-Al(sub 2)O(sub 3) thin films at 290 K, annealing the pyridine-dosed gamma-Al(sub2)O(sub 3) thin films to temperatures above 290 K, results in a small amount of pyridine dehydrogenation and the formation of surface OH groups with an O-H stretch at 3472 cm(super -1).

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Industrial Organic Chemicals, Thin Film Materials, Cyclic Crude and Intermediate Manufacturing, Pyridine, Thin films, Dielectric films, Adsorption, Vibrational spectra

---

Control size, nanometer-scale, and reaction vessels in two dimensions

Article Abstract:

Experiments reveal that the average size of the monolayer vacancy islands, which can be generated on transition metal surfaces by ion bombardment held at elevated temperature, can be varied in a controlled manner from 3 to 30 nm by adjusting the sample temperature. The monolayer vacancy islands can be used as two-dimensional nanometer-scale catalytic 'reaction vessels' is demonstrated.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Methods, Catalysis, Properties

---

Effects of coadsorbed hydrogen (or D) on the dehydrogenation of cyclohexane on pt(111): observation of the production of adsorbed cyclohexyl (C6H11)

Article Abstract:

The effects of coadsorbed hydrogen (or deuterium) on the dehydrogenation of cyclohexane on Pt(111) is studied with the help of laser induced thermal desorption-Fourier transform mass spectrometry (LITD-FTMS), Auger electron spectroscopy (AES) and thermal desorption spectroscopy (TDS). The observation is discussed with respect to kinetic isotope effect for the rehydrogenation of C6H11.

Influence, Observations, Spectrum analysis, Spectroscopy, Hydrogen bonding, Chemical properties, Chemical compounds

Similar abstracts:

• Abstracts: Combined Ab initio computational and solid-state (super 17)O MAS NMR studies of crystalline P(sub 2)O(sub 5). Investigation of sodium distribution in phosphate glasses using spin-echo 23Na NMR
• Abstracts: Electronic and vibrational properties of thiophene on Si(100). Changes in structural and electronic properties of the zeolite framework induced by extraframework Al and La in H-USY and La(x)NaY: A (super 29)Si and (super 27)Al MAS NMR and (super 27)Al MQ MAS NMR study
• Abstracts: Ligand conformational effects on the resonance Raman signature of [Fe(sub 4) S(sub 4)(SAryl)(sub 4)](super 2) clusters
• Abstracts: Adsorption and 2-dimensional association of lithium alkyl dicarbonates on the graphite surface through O(super -1)...Li(super +1)...pie (arene) interactions
• Abstracts: Electrochemical observation of the photoinduced formation of alloyed ZnSe(S) nanocrystals. Structure and photophysics of semiconductor nanocrystals

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.