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Linking the Gold Nanoparticles Formation Kinetics with Their Morphology
Author(s) -
LutyBłocho M.,
Wojnicki M.,
Grzonka J.,
Kurzydłowski K. J.,
Fitzner K.
Publication year - 2018
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.21152
Subject(s) - chemistry , colloidal gold , nucleation , nanoparticle , comproportionation , kinetics , morphology (biology) , chemical engineering , reagent , organic chemistry , electrochemistry , biology , engineering , physics , electrode , quantum mechanics , genetics
In this paper, we show that using different concentrations of reagents, it is possible to produce gold nanoparticles with different morphology (size, shape). The color of obtained colloidal gold change from pink, violet to blue, and it corresponds to the shape change. The pink color corresponds to spherical nanoparticles and the blue one to a star shape. The mixture of those two types of nanoparticles result in a violet tone. It was also shown that kinetics of nucleation and growth process is controlled by the reaction on the gold atoms surface, i.e., comproportionation of Au(III) and Au(0) to Au(I), which can be inhibited by varying precursor and reductant concentration.