TY - JOUR
T1 - Facile, Economic and Size-Tunable Synthesis of Metal Arsenide Nanocrystals
AU - Srivastava, Vishwas
AU - Janke, Eric M.
AU - Diroll, Benjamin T.
AU - Schaller, Richard D.
AU - Talapin, Dmitri V.
N1 - Funding Information:
This work was supported by the Department of Defense (DOD) Air Force Office of Scientific Research under grant number FA9550-14-1-0367, Office of Naval Research under grant number N00014-13-1-0490, NSF under Award CHE-1611331 and by II-VI Foundation.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/9/27
Y1 - 2016/9/27
N2 - Synthesis of colloidal nanocrystals (NC) of important arsenide nanomaterials (e.g., InAs, Cd3As2) has been limited by the lack of convenient arsenic precursors. Here we address this constraint by identifying a convenient and commercially available As precursor, tris-dimethylaminoarsine (As(NMe2)3), which can be used to prepare high quality InAs NCs with controlled size distributions. Our approach employs a reaction between InCl3 and As(NMe2)3 using diisobutylaluminum hydride (DIBAL-H) to convert As(NMe2)3 in situ into reactive intermediates AsHx(NMe2)3-x, where x = 1,2,3. NC size can be varied by changing DIBAL-H concentration and growth temperature, with colloidal solutions of InAs showing size dependent absorption and emission features tunable across wavelengths of 750 to 1450 nm. We also show that this approach works well for the colloidal synthesis of Cd3As2 NCs. By circumventing the preparation of notoriously unstable and dangerous arsenic precursors (e.g., AsH3 and As(SiMe3)3), this work improves the synthetic accessibility of arsenide-based NCs and, by extension, the potential of such NCs for use in infrared (IR) applications such as communications, fluorescent labeling and photon detection.
AB - Synthesis of colloidal nanocrystals (NC) of important arsenide nanomaterials (e.g., InAs, Cd3As2) has been limited by the lack of convenient arsenic precursors. Here we address this constraint by identifying a convenient and commercially available As precursor, tris-dimethylaminoarsine (As(NMe2)3), which can be used to prepare high quality InAs NCs with controlled size distributions. Our approach employs a reaction between InCl3 and As(NMe2)3 using diisobutylaluminum hydride (DIBAL-H) to convert As(NMe2)3 in situ into reactive intermediates AsHx(NMe2)3-x, where x = 1,2,3. NC size can be varied by changing DIBAL-H concentration and growth temperature, with colloidal solutions of InAs showing size dependent absorption and emission features tunable across wavelengths of 750 to 1450 nm. We also show that this approach works well for the colloidal synthesis of Cd3As2 NCs. By circumventing the preparation of notoriously unstable and dangerous arsenic precursors (e.g., AsH3 and As(SiMe3)3), this work improves the synthetic accessibility of arsenide-based NCs and, by extension, the potential of such NCs for use in infrared (IR) applications such as communications, fluorescent labeling and photon detection.
UR - http://www.scopus.com/inward/record.url?scp=84989203074&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84989203074&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.6b03501
DO - 10.1021/acs.chemmater.6b03501
M3 - Article
AN - SCOPUS:84989203074
SN - 0897-4756
VL - 28
SP - 6797
EP - 6802
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 18
ER -