Effects of Oxygen Adsorption on Morphological Evolution of Epitaxial Ag Island Films Grown on Si

Jongpil Ye, Dongchul Lee, Yongsik Jin

Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea

In this paper, we investigate the effect of annealing gas compositions on the morphological evolution of heteroepitaxial silver island films grown on silicon substrates. We show that the presence of oxygen during thermal annealing leads to the formation of more isotropic silver islands with enhanced rates of dewetting and coarsening. This is explained by the results of morphology analysis and density functional theory calculation showing that a larger extent of oxygen adsorption under oxygen annealing ambient decreases the surface energy anisotropy of silver and the surface diffusion barrier of silver adatoms and clusters.

J. Korean Phys. Soc. 2020; 76: 1071-1075  https://doi.org/10.3938/jkps.76.1071

Electrical and Chemical Sensing Properties of a Printed Indium-Tin-Oxide Film for the Detection of Hazardous and Noxious Substances 

Jun Seck Choi1, Dong Wan Ko1, Jun Young Seo1, Jae Ha Nho1, Ji Ho Chang1, Sang Tae Lee2, Jung-yeul Jung3, Moon Jin Lee3

1Major of Electronic Materials Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
2Department of Offshore Plant Management, Korea Maritime and Ocean University, Busan 49112, Korea
3Maritime Safety and Environmental Research Division, Korea Research Institute of Ships and Ocean Engineering, Daejeon 34103, Korea
We have investigated the feasibility of the printed ITO films as a chemical sensor. ITO films were printed on a PET substrate by using an ITO (Sn ~10%) power which has an average particle size of 45nm. Superior chemical sensing performance of ITO films was observed in compared with the results of sputtered ITO film. It was discussed that the difference of grain size between the two samples led to a remarkable difference in the respective carrier scattering mechanisms and sensing performance.
J. Korean Phys. Soc. 2020; 76: 1005-1009  https://doi.org/10.3938/jkps.76.1005
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