ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Recognition of the carbon thin films sub-structures: thermo-optical measurements

Ján Majling, Vladimír Kremničan, Vladimír Kovár, Karol Végső, Vasilij Šmatko, and Miroslav Kocifaj

Slovak University of Technology in Bratislava, Bratislava, Slovak Republic

E-mail: vladimir.kovar@stuba.sk

Abstract: Carbon thin films oxidation was investigated on-line by high-sensitivity optical transmission (OT) method. The films have been prepared by common vacuum arc discharge and subsequently air oxidized at linear heating rates until temperatures of their complete gasification. The shape of the optical curves acquired was interpreted in light of deduced partial optical changes, each of them being ascribed by simple sigmoidal dependence. The dependencies converted to their derivative form ordered respective to the temperature scale conveniently represent an inter-relationship among the sequentially evolved films’ optical events, considered as being closely related to the individual carbon-replenishing steps. The dependencies correspond well to the ones obtained on thicker films by means of the thermogravimetry (TG) measurements.

Keywords: Thermo-optical method; Carbon thin film; Oxidation; Curve fits

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-017-0210-z

Chemical Papers 71 (11) 2167–2171 (2017)