Synthesis of vulcanite (CuTe) and metastable Cu1.5Te nanocrystals using a dialkyl ditelluride precursor†
Evan H.
Robinson, 
ab
Kaelyn M.
Dwyer,
a
Alexandra C.
Koziel,
ab
Ahmed Y.
Nuriye
c
and
Janet. E.
Macdonald
*ab
ab
Kaelyn M.
Dwyer,
a
Alexandra C.
Koziel,
ab
Ahmed Y.
Nuriye
c
and
Janet. E.
Macdonald
*ab
Abstract
This study demonstrates that a dialkyl ditelluride reagent can produce metastable and difficult-to-achieve metal telluride phases in nanocrystal syntheses. Using didodecyl ditelluride and without the need for phosphine precursors, nanocubes of the pseudo-cubic phase (Cu1.5Te) were synthesized at the moderate temperature of 135 °C. At the higher temperature of 155 °C, 2-D nanosheets of vulcanite (CuTe) resulted, a nanomaterial in a phase that has not been previously achieved through thermal decomposition methods. Materials were characterized with TEM, powder XRD and UV-Vis-NIR absorbance spectroscopy.
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