How to accurately predict solution-phase gold nanostar stability

Analytical and Bioanalytical Chemistry
Wenjing XiAmanda J Haes

Abstract

Unwanted nanoparticle aggregation and/or agglomeration may occur when anisotropic nanoparticles are dispersed in various solvents and matrices. While extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory has been successfully applied to predict nanoparticle stability in solution, this model fails to accurately predict the physical stability of anisotropic nanostructures; thus limiting its applicability in practice. Herein, DLVO theory was used to accurately predict gold nanostar stability in solution by investigating how the choice of the nanostar dimension considered in calculations influences the calculated attractive and repulsive interactions between nanostructures. The use of the average radius of curvature of the nanostar tips instead of the average radius as the nanostar dimension of interest increases the accuracy with which experimentally observed nanoparticle behavior can be modeled theoretically. This prediction was validated by measuring time-dependent localized surface plasmon resonance (LSPR) spectra of gold nanostars suspended in solutions with different ionic strengths. Minimum energy barriers calculated from collision theory as a function of nanoparticle concentration were utilized to make kinetic predictions...Continue Reading

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Citations

Jul 3, 2020·Chemical Communications : Chem Comm·Li WangAhu Yuan
Aug 23, 2018·Analytical and Bioanalytical Chemistry·Lisa Holland, Wenwan Zhong
Apr 23, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Han-Chen LinChian-Hui Lai
Jun 21, 2019·Royal Society Open Science·Masauso Moses PhiriBarend Christiaan Vorster
Feb 24, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Samuel OkyemJeremy D Driskell
May 23, 2020·Nanomedicine : Nanotechnology, Biology, and Medicine·Allan Radaic, Daniel Martins-de-Souza
Sep 4, 2019·ACS Nano·Judith LangerLuis M Liz-Marzán
Dec 18, 2019·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Hoa T Phan, Amanda J Haes
Feb 7, 2019·Journal of the American Chemical Society·Wenjing Xi, Amanda J Haes
Sep 19, 2020·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Hoa T PhanAmanda J Haes
Oct 30, 2021·ACS Nano·Bilal HussainReza Abdi
Jan 6, 2022·Dalton Transactions : an International Journal of Inorganic Chemistry·Yutaro YamashitaMitsuhiko Shionoya

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