Unveiling the nature of adsorbed species onto the surface of MgO thin films during prolonged annealing

Title
Unveiling the nature of adsorbed species onto the surface of MgO thin films during prolonged annealing
Authors
채근화씽 지텐드라지미정Manish KumarIk-Jae Lee
Keywords
MgO; Adsorption; NEXAFS; FTIR
Issue Date
2018-06
Publisher
Journal of alloys and compounds
Citation
VOL 748-362
Abstract
Present work investigates the nature of adsorbed species onto the surface of MgO thin films during prolonged annealing. The prolonged annealing (300  °C, 24  h) was performed on MgO thin films of different thicknesses ranging from 6.5 to 56.2  nm in order to exactly identify the related effect. Deposited films of different thicknesses exhibited local electronic structure very much analogues to the bulk MgO as investigated through near edge X-ray absorption fine structure measurements. These measurements further revealed that local electronic structure was significantly modified by prolonged annealing. It was contemplated that oxygen molecules were adsorbed on the surface of MgO thin films during prolonged annealing. Apart from this, onset of H2O adsorption was also identified using Fourier transform infrared spectroscopy.
URI
http://pubs.kist.re.kr/handle/201004/70210
ISSN
0925-8388
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KIST Publication > Article
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