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Centrifugal Shape Sorting and Optical Response of Polyhedral Gold Nanoparticles
Author(s) -
Shin Yu Jin,
Ringe Emilie,
Personick Michelle L.,
Cardinal M. Fernanda,
Mirkin Chad A.,
Marks Laurence D.,
Van Duyne Richard P.,
Hersam Mark C.
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201301278
Subject(s) - materials science , sorting , dodecahedron , scanning electron microscope , nanostructure , nanoparticle , refractive index , colloidal gold , optics , nanotechnology , optical microscope , hexagonal crystal system , crystallography , optoelectronics , composite material , physics , chemistry , computer science , programming language
A centrifugal route for separating small {110}‐faceted gold nanostructures, namely rhombic dodecahedra (RD) and triangular bipyramids (BPs), which form simultaneously during synthesis and cannot be separated by means of conventional filtration methods, is presented. The centrifuged solution shows two distinct bands: i) RD and ii) BPs, as verified in the corresponding scanning electron microscopy images. The sorted BPs show a refractive index dependence 2.5 times that of the as‐synthesized, unsorted mixture.