Fabrication of nanoporous thin films via radio-frequency magnetron sputtering and O2 plasma ashing

Title
Fabrication of nanoporous thin films via radio-frequency magnetron sputtering and O2 plasma ashing
Authors
한승희장성우황세훈임상호
Keywords
Nanoporous thin films; Radio-frequency magnetron sputtering; Oxygen plasma ashing; Porosity
Issue Date
2019-05
Publisher
Vacuum
Citation
VOL 163-87
Abstract
In this study, we report a new method for fabricating nanoporous thin films. In the first step, metal– carbon thin films were prepared by radio-frequency reactive magnetron sputtering, using Cu, Ni, and Ti targets as the metal sources and CH4 gas as the carbon source during the co-deposition process. In the second step, the metal– carbon films were then oxidized by an oxygen plasma generated with a flowing a gas mixture of Ar and O2, and nanoporous metal– oxide films were obtained by removing carbon atoms from the metal– carbon thin films. The pores in the films varied with the amount of carbon in the film surface, and mesopores grew to lager macropores as the flow rate of CH4 was increased. Depending on the film composition, the calculated porosity varied from 50% to 90%. With advantages such as a wide range of suitable raw materials and good reproducibility, this fabrication method is expected to offer a new approach to the commercial production of nanoporous materials.
URI
http://pubs.kist.re.kr/handle/201004/69065
ISSN
0042-207X
Appears in Collections:
KIST Publication > Article
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