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Issue 16, 2018
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Structural transformation of h-BN overlayers on Pt(111) in oxidative atmospheres

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Abstract

Interaction of hexagonal boron nitride (h-BN) with gases is of great importance for its properties and applications. In the present work, the structural changes of h-BN overlayers on Pt(111) in oxidative atmospheres including O2 and NO2 have been investigated by using low energy electron microscopy, Auger electron spectroscopy, X-ray photoelectron spectroscopy (XPS), and near ambient pressure XPS. We find that h-BN islands can be intercalated by oxygen in 10−6 Torr O2 at 200 °C, while oxygen intercalation of full layer h-BN around 200 °C requires near ambient pressure O2 (0.1 Torr) or such a strong oxidant as NO2 (10−6 Torr). h-BN overlayers can be etched away in the gases at much high temperatures, e.g. 800 °C. Upon mild oxidation in O2 or NO2 at temperatures of 400–450 °C, h-BN is transformed to boron oxide (BOx) overlayers, which can be converted back to h-BN by heating in NH3 at 800 °C.

Graphical abstract: Structural transformation of h-BN overlayers on Pt(111) in oxidative atmospheres

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Publication details

The article was received on 07 Feb 2018, accepted on 20 Mar 2018 and first published on 20 Mar 2018


Article type: Paper
DOI: 10.1039/C8CP00877A
Citation: Phys. Chem. Chem. Phys., 2018,20, 11013-11020
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    Structural transformation of h-BN overlayers on Pt(111) in oxidative atmospheres

    C. Meng, Y. Li, H. Wu, W. Wei, Y. Ning, Y. Cui, Q. Fu and X. Bao, Phys. Chem. Chem. Phys., 2018, 20, 11013
    DOI: 10.1039/C8CP00877A

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