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Chemical state
About: Chemical state is a research topic. Over the lifetime, 2378 publications have been published within this topic receiving 78183 citations.
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01 Feb 1990-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: In this article, the chemical state and the electronic structure of ion-bombarded polymers are studied by XPS and REELS techniques, and the rate and the relative yield of the bombardment induced chemical reactions are shown to depend on the primary chemical structure of the bombarding polymers as well as on the total ion deposited energy, fluence and energy deposition mechanism.
Abstract: Factors influencing the chemical modification of polymers under ion bombardment are discussed. The chemical state and the electronic structure of ion-bombarded polymers are studied by XPS and REELS techniques. Ion bombardment of polymers is shown to induce well defined reactions involving the gradual modification of the original chemical structure within well defined fluence ranges, characteristic for each type of chemical reaction. The rate and the relative yield of the bombardment induced chemical reactions are shown to depend on the primary chemical structure of the bombarded polymers as well as on the total ion deposited energy, fluence and energy deposition mechanism. Such a dependence is discussed for some ion induced reactions in polyvynilpyridine (PVPY), polyethersulphone (PES). It is shown that polymer samples bombarded at very high fluence (10 15 −10 16 ions/cm 2 ) still keep “memory” of their primary stoichiometry and chemical structure showing spectroscopic characteristics similar to those of hydrogenated amorphous carbons. A number of cases are discussed in which the physical and electronic structure of the “carbonaceous” materials obtained depend upon the energy deposition mechanisms.
219 citations
TL;DR: In this paper, the fine structure of the carbon Auger peak was found to be a sensitive indicator of the chemical state of a carbonaceous layer and it is suggested that the CH x layer consists to a large degree of CH species.
216 citations
TL;DR: In this article, the authors showed that the photocatalytic activity of nanoparticle TiO 2 /Ti(3) film with three layers calcined at 600°C was the highest.
213 citations
TL;DR: In this article, an X-ray photoelectron spectroscopy analysis of certain standard materials from the system CuOSH was carried out, which is important in the study of corrosion products formed on copper in aqueous or atmospheric sulfurbearing environments.
211 citations