期刊
APPLIED SURFACE SCIENCE
卷 289, 期 -, 页码 445-449出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2013.10.189
关键词
Pt doped graphene; Gas adsorption; Magnetic property; DFT
类别
资金
- National Research Foundation (NRF)
- Korean government (MEST) [20110016945]
The effect of gas adsorption on the change in magnetic properties of platinum doped graphene (Pt-graphene) system was investigated using first-principles density-functional theory (DFT). Four chemisorbed gas molecules (N-2, O-2, NO2, SO2) on Pt-graphene each induced a different type of magnetic properties. For N-2 adsorption, there was no spin polarization. However, for the other cases, magnetic properties were altered by occurring spin polarization. O-2 adsorption led to local polarization on the gas molecule, and two types of complete polarization were introduced on Pt-graphene by NO2 and SO2 adsorption. Also, in the latter two cases, an interesting difference was found in the spin direction of gas and Pt-graphene. NO2 adsorption induced the same spin direction on the adsorbate and substrate, while SO2 adsorption introduced the opposite spin directions. Thus, these differences in magnetic properties of the Pt-graphene according to the type of adsorbed gas molecules are expected to play a vital role in application as gas sensor or spintronic devices. (C) 2013 Elsevier B.V. All rights reserved.
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