A solution synthetic route toward Bi2Se3 layered nanostructures with tunable thickness via weakening precursor reactivity. Issue 9 (21st June 2013)

• Record Type: Journal Article
• Authors: Wei, Tiaoxing; Zhang, Yun; Dong, Wenjing; Huang, Chanyan; Sun, Yan; Chen, Xin; Dai, Ning
• Is Part Of: Physica status solidi. Volume 210:Issue 9(2013:Sep.)
• Page Start: 1909
• Page End: 1913
• Publication Date: 2013-06-21
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201329183
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssa201329183-sec-0001" sec-type="section"> <p>We developed a solution synthetic route to Bi<sub>2</sub>Se<sub>3</sub> layered nanostructures through weakening the reactivity of precursors in a hot‐injection process. Oleylamine (OYA) and its content in precursor solutions determined reliable synthesis and tunable thickness of Bi<sub>2</sub>Se<sub>3</sub> layered nanostructures. The Raman shift of the out‐of‐plane vibration mode (<alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgg3g3v7jrk" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:18626300:media:pssa201329183:pssa201329183-math-0001" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msubsup><mml:mi>A</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mi>g</mml:mi></mml:mrow><mml:mn>1</mml:mn></mml:msubsup></mml:mrow></mml:math></alternatives>) suggested that the minimum thickness of Bi<sub>2</sub>Se<sub>3</sub> layered nanostructures could be down to ∼3 nm [about three quintuple layers (QLs)] by varying the content of OYA. Both energy dispersive spectroscopy and X‐ray photoelectronic spectroscopy proved that there were no inorganic impurities imported into Bi<sub>2</sub>Se<sub>3</sub> nanostructures. This synthetic approach would bring about more opportunities for flexible preparation of promising layered nanomaterials with tunable thickness for thermoelectric conversion, electrochemical hydrogen storage, and even topological insulators.</p> </sec> </abstract>