title: Ultrananocrystalline diamond film as an optimal cell interface for biomedical applications.
abstract: Surfaces of materials that promote cell adhesion, proliferation, and growth are critical for new generation of implantable biomedical devices. These films should be able to coat complex geometrical shapes very conformally, with smooth surfaces to produce hermetic bioinert protective coatings, or to provide surfaces for cell grafting through appropriate functionalization. Upon performing a survey of desirable properties such as chemical inertness, low friction coefficient, high wear resistance, and a high Young's modulus, diamond films emerge as very attractive candidates for coatings for biomedical devices. A promising novel material is ultrananocrystalline diamond (UNCD) in thin film form, since UNCD possesses the desirable properties of diamond and can be deposited as a very smooth, conformal coating using chemical vapor deposition. In this paper, we compared cell adhesion, proliferation, and growth on UNCD films, silicon, and platinum films substrates using different cell lines. Our results showed that UNCD films exhibited superior characteristics including cell number, total cell area, and cell spreading. The results could be attributed to the nanostructured nature or a combination of nanostructure/surface chemistry of UNCD, which provides a high surface energy, hence promoting adhesion between the receptors on the cell surface and the UNCD films.
authors.affiliation: Birck Nanotechnology Center, Bindley Biosciences Center, Purdue University, West Lafayette, IN, USA.
authors.forename: Piyush
authors.initials: P
authors.lastname: Bajaj
authors.forename: Demir
authors.initials: D
authors.lastname: Akin
authors.forename: Amit
authors.initials: A
authors.lastname: Gupta
authors.forename: Debby
authors.initials: D
authors.lastname: Sherman
authors.forename: Bing
authors.initials: B
authors.lastname: Shi
authors.forename: Orlando
authors.initials: O
authors.lastname: Auciello
authors.forename: Rashid
authors.initials: R
authors.lastname: Bashir
mesh_terms: D001698:Biomedical Engineering / Q000295:instrumentation / Q000379:methods; D002448:Cell Adhesion; D018929:Cell Culture Techniques / Q000295:instrumentation* / Q000379:methods; D049109:Cell Proliferation; D018130:Diamond / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D013499:Surface Properties; D023822:Tissue Engineering / Q000295:instrumentation* / Q000379:methods
chemical_list: D008567:Membranes, Artificial; D018130:Diamond