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Fabrication of flexible and freestanding zinc chalcogenide single layers
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2012 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 3, 1057- p.Article in journal (Refereed) Published
Abstract [en]

Inorganic graphene analogues (IGAs) are a conceptually new class of materials with attractive applications in next-generation flexible and transparent nanodevices. However, their species are only limited to layered compounds, and the difficulty in extension to non-layered compounds hampers their widespread applicability. Here we report the fabrication of large-area freestanding single layers of non-layered ZnSe with four-atomic thickness, using a strategy involving a lamellar hybrid intermediate. Their surface distortion, revealed by means of synchrotron radiation X-ray absorption fine structure spectroscopy, is shown to give rise to a unique electronic structure and an excellent structural stability, thus determining an enhanced solar water splitting efficiency and photostability. The ZnSe single layers exhibit a photocurrent density of 2.14 mA cm(-2) at 0.72 V versus Ag/AgCl under 300 W Xe lamp irradiation, 195 times higher than that of bulk counterpart. This work opens the door for extending atomically thick IGAs to non-layered compounds and holds promise for a wealth of innovative applications.

Place, publisher, year, edition, pages
2012. Vol. 3, 1057- p.
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Chemical Sciences
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URN: urn:nbn:se:uu:diva-184475DOI: 10.1038/ncomms2066ISI: 000309338100024OAI: oai:DiVA.org:uu-184475DiVA: diva2:565753
Available from: 2012-11-08 Created: 2012-11-07 Last updated: 2017-12-07Bibliographically approved

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Hu, Shuanglin

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