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|Type:||Artigo de periódico|
|Title:||Imaging Ice-like Structures Formed On Hopg At Room Temperature.|
|Abstract:||In this work, ice was viewed at the nanoscale by scanning an atomic force microscopy tip over a highly oriented pyrolytic graphite (HOPG) surface in air. At low scan velocities, the tip exhibited stick-slip motion with a period of 0.13 nm corresponding to the scanner step; at higher velocities, the HOPG lattice and the periodicity of the ice were visible. A hexagonal structure with a 0.45 ± 0.04 nm periodicity was observed in which the distance between the second neighbors of the HOPG coincided with the distance of the first neighbors for the ice-like arrangement. Small water clusters were also nucleated with an ice-Ic structure (0.34 ± 0.03 nm), and thus, the ice layers consisted of extensive sets composed of arrangements of hexamers and tetramers.|
Microscopy, Atomic Force
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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