IR spectra of small molecules adsorbed on carbon films. Adsorption potentials and spectral shifts |
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| Institution: | 1. Laboratório de Plasmas e Processos - LPP, Instituto Tecnológico de Aeronáutica – ITA, Praça Mal. Eduardo Gomes, 50, São José dos Campos, São Paulo, Brazil;2. Instituto de Estudos Avançados, Trevo Coronel Aviador José Alberto Albano do Amarante, 1, São José dos Campos, SP, Brazil;3. Grupo de Pesquisa em Materiais Fotônicos e Energia Renovável (MaFER), Universidade Federal da Grande Dourados – UFGD, Dourados, MS, Brazil;4. Mackenzie Presbyterian University, School of Engineering - PPGEMN, Rua da Consolação, 89601302-907 São Paulo, SP, Brazil |
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| Abstract: | IR spectra of CO, NO and CH3F adsorbed on graphite-like and diamond powder films were studied at low temperatures. The graphite-like films were prepared by laser evaporation of graphite in He atmosphere. The diamond films were obtained by sedimentation of fine diamond particles from a suspension. In a11 cases physical adsorption was observed. The spectrum of adsorbed NO showed clearly the presence of dimers. For CO, the adsorption potential and the shift in frequency from the gas phase were calculated for both adsorbents, and compared with the experimental values. |
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