Polarity-Driven Polytypic Branching in Cu-Based Quaternary Chalcogenide Nanostructures | Zendy

Reza R. Zamani | Zendy; María Ibáñez | Zendy; M. Luysberg | Zendy; Nuria García-Castelló | Zendy; Lothar Houben | Zendy; Joan Daniel Prades | Zendy; Vincenzo Grillo | Zendy; Rafal E. DuninBorkowski | Zendy; J.R. Morante | Zendy; Andreu Cabot | Zendy; Jordi Arbiol | Zendy

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Polarity-Driven Polytypic Branching in Cu-Based Quaternary Chalcogenide Nanostructures

Author(s) -

Reza R. Zamani,

María Ibáñez,

M. Luysberg,

Nuria García-Castelló,

Lothar Houben,

Joan Daniel Prades,

Vincenzo Grillo,

Rafal E. DuninBorkowski,

J.R. Morante,

Andreu Cabot,

Jordi Arbiol

Publication year - 2014

Publication title -

acs nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.554

H-Index - 382

eISSN - 1936-086X

pISSN - 1936-0851

DOI - 10.1021/nn405747h

Subject(s) - chalcogenide , chemical physics , materials science , crystallography , polarity (international relations) , transmission electron microscopy , branching (polymer chemistry) , polar , scanning transmission electron microscopy , tetrahedron , nanotechnology , chemistry , optoelectronics , physics , biochemistry , astronomy , composite material , cell

An appropriate way of realizing property nanoengineering in complex quaternary chalcogenide nanocrystals is presented for Cu2CdxSnSey(CCTSe) polypods. The pivotal role of the polarity in determining morphology, growth, and the polytypic branching mechanism is demonstrated. Polarity is considered to be responsible for the formation of an initial seed that takes the form of a tetrahedron with four cation-polar facets. Size and shape confinement of the intermediate pentatetrahedral seed is also attributed to polarity, as their external facets are anion-polar. The final polypod extensions also branch out as a result of a cation-polarity-driven mechanism. Aberration-corrected scanning transmission electron microscopy is used to identify stannite cation ordering, while ab initio studies are used to show the influence of cation ordering/distortion, stoichiometry, and polytypic structural change on the electronic band structure.

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