Concerns for the environmental and economic impact of organic solvents in gold nanoparticle synthesis have motivated the search for more environmentally benign alternatives. One viable approach is the synthesis of AuNPs from tetrachloroauric(III) acid (HAuCl4) using triblock copolymers (TBPs). However, a major challenge of using TBPs is the heterogeneous nature of the formed nanocrystals. Establishing control over AuNP size and shape requires a detailed mechanistic understanding of precursor reduction and nanoparticle growth. By using mixtures of TBPs (L31 and F68), a more flexible method to tune AuNP size and shape is demonstrated. This is achieved by adjusting the TBP/Au(III) ratio and the concentrations of seed citrate-stabilized AuNPs. Kinetic models are used to explain why L31 inhibits the rate of AuNP formation and growth. Experimental evidence of sigmoidal growth kinetics, early time bimodal gold nanoparticle size distributions, and polycrystallinity suggest that aggregative AuNP growth is an important mechanism.
School of Medicine
Perry, Christopher C.
Kurti, R. Steven
Doctor of Philosophy (PhD)
Year Degree Awarded
Date (Title Page)
Library of Congress/MESH Subject Headings
Nanostructures; Chemical kinetics; Biochemistry; Solvents - Adverse Effects
Subject - Local
Kinetics; Nanoparticles; Triblock Copolymer; Organic solvents - Environmental Impact
Loma Linda University Libraries
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Sabir, Theodore Saleem, "Kinetically Controlled Synthesis of Triblock Copolymer Stabilized Gold Nanoparticles" (2012). Loma Linda University Electronic Theses, Dissertations & Projects. 96.
Loma Linda University Electronic Theses & Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives