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An Ivestigation of Temperature-Manipulated Size and Shape Evolution of Preformed Core-Shell Nanoparticles

Published online by Cambridge University Press:  15 February 2011

M.M. Maye ,
W.X. Zheng ,
F.L. Leibowitz ,
N.K. Ly ,
H.H. Eichelberger  and
C.J. Zhong
M.M. Maye
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, [email protected]
W.X. Zheng
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, [email protected]
F.L. Leibowitz
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, [email protected]
N.K. Ly
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, [email protected]
H.H. Eichelberger
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, [email protected]
C.J. Zhong
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, [email protected]
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Abstract

This paper presents a study of heating-induced size and shape change for pre-synthesized composite nanoparticles of ∼2 nm gold cores encapsulated with alkanethiolate monolayers. The results have demonstrated an evolution in size and shape of the nanoparticles towards monodispersed larger core sizes with well-defined and highly-faceted morphologies. The evolved particles were encapsulated with the thiolate shells. The morphological and structural evolutions were characterized using TEM, XRD, UV-Vis and FTIR spectroscopy. While temperature-driven crystal growth is known for non-encapsulated particles, the evolution of the thiolate-encapsulated nanoparticles in solutions into well-defined morphologies represents an intriguing example of temperature manipulations of nanoparticle monodispersity and shape.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 201
Copyright
Copyright © Materials Research Society 2000

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