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A solution synthetic route toward Bi 2 S e 3 layered nanostructures with tunable thickness via weakening precursor reactivity
Author(s) -
Wei Tiaoxing,
Zhang Yun,
Dong Wenjing,
Huang Chanyan,
Sun Yan,
Chen Xin,
Dai Ning
Publication year - 2013
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201329183
Subject(s) - materials science , nanostructure , raman spectroscopy , nanomaterials , reactivity (psychology) , oleylamine , chemical engineering , spectroscopy , nanotechnology , nanoparticle , optics , medicine , physics , alternative medicine , engineering , pathology , quantum mechanics
We developed a solution synthetic route to Bi 2 Se 3 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 2 Se 3 layered nanostructures. The Raman shift of the out‐of‐plane vibration mode ( A 1 g 1 ) suggested that the minimum thickness of Bi 2 Se 3 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 2 Se 3 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.