Humidity-Dependent Reversible Transitions in Gold Nanoparticle Superlattices

Kunstmann-Olsen, C, Belic, D ORCID: 0000-0002-7954-7046, Bradley, DF, Grzelczak, MP ORCID: 0000-0002-3215-1044 and Brust, M ORCID: 0000-0001-6301-7123 (2016) Humidity-Dependent Reversible Transitions in Gold Nanoparticle Superlattices. CHEMISTRY OF MATERIALS, 28 (9). pp. 2970-2980.

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Abstract

The changes in interparticle spacing upon hydration and dehydration of drop-cast films of hydrophilic gold nanoparticles (GNP) have been measured in situ with nanometer resolution using WetSTEM and ESEM. These subtle variations correlate well with the corresponding changes in the optical spectra and perceived color as well as changes in the electrical conductivity of the films. AC impedance analysis allows us to differentiate between resistive and capacitive components and to evaluate how these depend on average particle spacing and the water content of the matrix, respectively. Thin films of this type are well-known structures used for development of sensors and diagnostics.

Item Type:	Article
Uncontrolled Keywords:	Nanotechnology, Bioengineering
Depositing User:	Symplectic Admin
Date Deposited:	26 Apr 2016 10:27
Last Modified:	14 Mar 2024 22:30
DOI:	10.1021/acs.chemmater.6b00070
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3000876