Stability of gold nanorods passivated with amphiphilic ligands

Langmuir : the ACS Journal of Surfaces and Colloids
James Chen Yong KahKimberly Hamad-Schifferli

Abstract

The stability of gold nanorods (NRs) coated with amphiphilic ligands (ALs) was investigated. NRs coated with cetyltrimethylammonium bromide (CTAB) were ligand exchanged with polyoxyethylene [10] cetyl ether (Brij56), Oligofectamine (OF), and phosphatidylserine (PS). An aggregation index based on the longitudinal surface plasmon resonance peak broadening was used to measure stability of the NR-ALs under different conditions including the number of washes, pH, ionic concentration, and temperature. The aggregation index was also used to measure the stability of the NR-ALs under ultrafast laser irradiation and in the presence of proteins commonly used in cell culture. Differences in NR-AL stability were found, which were due to differences in the physical and chemical properties of the ALs. Apart from the charge on the AL headgroup, we suggest the Gibbs free energy of passivation (ΔG(p)) and enthalpy of passivation (ΔH(p)) of the AL could potentially aid in the selection of amphiphiles that can effectively passivate NRs for stability and optimize their properties and desired biological impact.

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Citations

Jul 19, 2012·ACS Nano·James Chen Yong KahKimberly Hamad-Schifferli
Oct 17, 2013·ACS Nano·Anna Cifuentes-RiusKimberly Hamad-Schifferli
Oct 11, 2015·Talanta·Tahereh Tohidi Moghadam, Bijan Ranjbar
Mar 24, 2016·Nanomedicine·Yan Teck HoJames Chen Yong Kah
Aug 25, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·James R MatthewsJason H Hafner
Sep 28, 2014·Colloids and Surfaces. B, Biointerfaces·Kristen K ComfortSaber M Hussain
Mar 3, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Tyler R RaySumita Pennathur
Feb 29, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Lina GaoZijian Guo
Sep 16, 2020·Analytical Methods : Advancing Methods and Applications·Cristina Rodriguez-QuijadaKimberly Hamad-Schifferli
Aug 18, 2017·Chemistry, an Asian Journal·Sundo JeongMyoung-Hwan Park
Feb 23, 2021·The Journal of Physical Chemistry. B·Mathieu L SimeralJason H Hafner
Jun 12, 2017·ACS Biomaterials Science & Engineering·Eugenia Li Ling YeoJames Chen Yong Kah
Oct 16, 2018·ACS Omega·Maria Sánchez-PurràKimberly Hamad-Schifferli

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