Study of optical properties and biocompatibility of DLC films characterized by sp3 bonds

• Published in: Applied physics. A, Materials science & processing Vol. 112; no. 1; pp. 143 - 148
• Main Authors: Písařík, Petr, Jelínek, Miroslav, Smetana, Karel, Dvořánková, Barbora, Kocourek, Tomáš, Zemek, Josef, Chvostová, Dagmar
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.07.2013
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Density; Diamond-like carbon films; Ellipsometry; Energy density; In vitro testing; Machines; Manufacturing; Materials science; Nanotechnology; Optical and Electronic Materials; Optical properties; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Thin Films; X-ray photoelectron spectroscopy; Pulse Laser Deposition; Negative Electron Affinity; Fibrinogen Adsorption; Laser Energy Density; Biomedical Property
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-012-7216-8

Optical and biomedical properties of diamond-like carbon (DLC) films of various sp 2 , sp 3 bonds were studied. The layers were prepared by pulsed laser deposition (PLD) for laser energy densities from 4 J cm −2 to 14 J cm −2 . The percentage of sp 2 and sp 3 bonds was calculated using X-ray photoelectron spectroscopy (XPS). In dependence on density the films contained up to 70 % of sp 3 bonds. Optical properties were measured using spectroscopic ellipsometry in region from 250 nm to 1000 nm ( n =2.6–2.7; k =0.07–0.25) and by transmission measurement (from 200 nm to 1100 nm). The adhesion and growth of human fibroblasts and keratinocytes of DLC films were tested in vitro.