Sum-frequency spectroscopic studies of ice interfaces
Nenhuma Miniatura disponível
Data
2002-08-15
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Sum-frequency vibrational spectroscopy was used to study the (0001) surface of hexagonal ice (Ih) in contact with: air, a hydrophobic substrate, and a hydrophilic substrate. The spectra in the O-H stretch frequency range were obtained at various temperatures. For the air/ice interface, the degree of orientational order of the dangling OH bonds at the surface was measured as a function of temperature. Surface disordering appears to set in around 200 K and increases dramatically with temperature, which is a strong indication of the presence of surface melting of ice. For the hydrophobic and hydrophilic ice interfaces, a similar temperature dependence of the hydrogen-bonded OH stretch peak was observed. The free OH stretch mode, however, appears to be different from that of the air/ice interface due to the interactions with substrates at the interfaces.
Descrição
Palavras-chave
Como citar
Physical Review B - Condensed Matter and Materials Physics, v. 66, n. 8, p. 854011-8540113, 2002.