Journal
MATERIALS LETTERS
Volume 65, Issue 8, Pages 1184-1187Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2011.01.037
Keywords
TEM; Sputter deposition; Bio-materials; Super-hydrophilic
Funding
- National Institutes of Health [1RC1HL099445-01]
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A super-hydrophilic Ni-Ti thin film is evaluated using cross-sectional transmission electron microscopy (TEM). Following sputter deposition and annealing, the Ni-Ti thin films are chemically treated with buffered oxide etchant, nitric acid and 30% hydrogen peroxide solution to produce a 100-nm-thick surface oxide layer. The fabricated Ni-Ti thin films show a 10- to 15-nm TiO2 thick layer on its surface with a similar to 67 degrees wetting angle. For the surface treated sample, a porous oxide 100 nm TiO layer is found with a <5 degrees. It is believed that TiOOH (H2O)(n) complex forms on the surface to produce the observed super-hydrophilic behavior. Published by Elsevier B.V.
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