期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 14, 页码 6132-6135出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja3021395
关键词
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资金
- National Science Foundation of China [20973007, 51121091, 21173004, 11104003]
- National Basic Research Program of China [2012CB933404, 2011CB921904, 2011CB933003]
- NCET
- SRF for ROCS and SEM
- U.S. DARPA MESO [N66001-11-1-4105]
The orientation- and position-controlled synthesis of single-crystal topological insulator (Bi2Se3 and Bi2Te3) nanoplate arrays on mica substrates was achieved using van der Waals epitaxy. Individual ultrathin nano-plates with the lateral dimension up to similar to 0.1 mm or uniform thickness down to 1-2 nm were produced. Single-Dirac-cone surface states of nanoplate aggregates were confirmed by angle-resolved photoemission spectroscopy measurements. The large-grain-size, single-crystal nanoplate arrays grown on mica can act as facile platforms for a combination of spectroscopy and in situ transport measurements, which may open up new avenues for studying exotic physical phenomena, surface chemical reactions, and modification in topological insulators.
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