TY - GEN
T1 - Enhanced wettability of nanocrystalline diamond films for biocoating applications
AU - Yang, Jason H.C.
AU - Teii, Kungen
N1 - Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research (C) from the Japan Society for the Promotion of Science. The authors would like to thank K. Kitazume for cooperation in the experiments.
PY - 2012
Y1 - 2012
N2 - Nanocrystalline diamond (NCD) films are prepared from Ar-rich/N 2/CH 4 and Ar-rich/H 2/CH 4 mixtures by microwave plasma-enhanced chemical vapor deposition, and further treated by microwave hydrogen and oxygen plasma exposures separately to enhance the wetting property. The hydrogen plasma treatment has small effect on the surface roughness, while the oxygen plasma treatment forms fine protrusions on the film surface. Results show that the wettability of the hydrogen plasma treated NCD film is nearly constant or little improvement as the polar component of the apparent surface free energy is close to the as-deposit NCD film. In contrast, the wettability of the oxygen plasma treated NCD film is improved dramatically such that the contact angle is reduced from 92° and 4.7° to almost 0° for water and 1-bromonaphthalene, respectively, and the polar component increases significantly to 34 mJ/m 2. The low contact angle suggests that the film is considerably a cell adhesive friendly surface, which is essential in maintaining multicellular structure, and thus making it a favorable wetting surface for biological and biomedical applications.
AB - Nanocrystalline diamond (NCD) films are prepared from Ar-rich/N 2/CH 4 and Ar-rich/H 2/CH 4 mixtures by microwave plasma-enhanced chemical vapor deposition, and further treated by microwave hydrogen and oxygen plasma exposures separately to enhance the wetting property. The hydrogen plasma treatment has small effect on the surface roughness, while the oxygen plasma treatment forms fine protrusions on the film surface. Results show that the wettability of the hydrogen plasma treated NCD film is nearly constant or little improvement as the polar component of the apparent surface free energy is close to the as-deposit NCD film. In contrast, the wettability of the oxygen plasma treated NCD film is improved dramatically such that the contact angle is reduced from 92° and 4.7° to almost 0° for water and 1-bromonaphthalene, respectively, and the polar component increases significantly to 34 mJ/m 2. The low contact angle suggests that the film is considerably a cell adhesive friendly surface, which is essential in maintaining multicellular structure, and thus making it a favorable wetting surface for biological and biomedical applications.
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U2 - 10.1557/opl.2012.12
DO - 10.1557/opl.2012.12
M3 - Conference contribution
AN - SCOPUS:84864989002
SN - 9781605113722
T3 - Materials Research Society Symposium Proceedings
SP - 75
EP - 80
BT - Diamond Electronics and Biotechnology - Fundamentals to Applications V
T2 - 2011 MRS Fall Meeting
Y2 - 28 November 2011 through 2 December 2011
ER -