Facile assembly of size- and shape-tunable IV-VI nanocrystals into superlattices.
In comparison to the previous lengthy approaches, we described a general and simple strategy for engineering the superlattice assembly of IV-VI semiconductor nanocrystals (NCs) with tunable sizes and morphologies. Not only the well-studied spherical NCs but also some special-shaped NCs, such as the quasi-cubic, cubic, truncated octahedral, and octahedral, could self-assemble into well-ordered patterns, as demonstrated in PbS, PbSe, and PbTe. These results extended our proposed model about the configuration of ligand chains in the superlattice assembly. This powerful capability of assembling superlattices was dominated by a heat-treatment process, providing a significant and extensive direction in the engineering of morphology-tunable NC superlattices.
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, PR China.
Yingnan
Y
Wang
Quanqin
Q
Dai
Bo
B
Zou
William W
WW
Yu
Bingbing
B
Liu
Guangtian
G
Zou