Fabrication of flexible and freestanding zinc chalcogenide single layers

被引：469

作者：

Sun, Yongfu ^{[1
]}

Sun, Zhihu ^{[2
]}

Gao, Shan ^{[1
]}

Cheng, Hao ^{[2
]}

Liu, Qinghua ^{[2
]}

Piao, Junyu ^{[1
]}

Yao, Tao ^{[2
]}

Wu, Changzheng ^{[1
]}

Hu, Shuanglin ^{[3
]}

Wei, Shiqiang ^{[2
]}

Xie, Yi ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

[3] Uppsala Univ, Angstrom Lab, Dept Chem Mat, Uppsala, Sweden

来源：

NATURE COMMUNICATIONS | 2012年 / 3卷

关键词：

VISIBLE-LIGHT; THIN-FILMS; GRAPHENE; EXFOLIATION; NANOSHEETS; PHASE;

D O I：

10.1038/ncomms2066

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：7

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