Gold Nanofilms at Liquid–Liquid Interfaces: An Emerging Platform for Redox Electrocatalysis, Nanoplasmonic Sensors, and Electrovariable Optics

The functionality of liquid–liquid interfaces formed between two immiscible electrolyte solutions (ITIES) can be markedly enhanced by modification with supramolecular assemblies or solid nanomaterials. The focus of this Review is recent progress involving ITIES modified with floating assemblies of g...

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Bibliographic Details
Published in:Chemical reviews 2018-04, Vol.118 (7), p.3722-3751
Main Authors: Scanlon, Micheál D, Smirnov, Evgeny, Stockmann, T. Jane, Peljo, Pekka
Format: Article
Language:English
Subjects:
Analytical chemistry
Assemblies
Catalysis
Catalytic activity
Chemical Sciences
Control methods
Electrocatalysis
Floating
Gold
Heat conductivity
Interfacial properties
Nanomaterials
Nanoparticles
Nanotechnology
Optics
or physical chemistry
Physiochemistry
Raman spectroscopy
Sensors
Spectrum analysis
Submerging
Theoretical and
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Summary:The functionality of liquid–liquid interfaces formed between two immiscible electrolyte solutions (ITIES) can be markedly enhanced by modification with supramolecular assemblies or solid nanomaterials. The focus of this Review is recent progress involving ITIES modified with floating assemblies of gold nanoparticles or “nanofilms”. Experimental methods to controllably modify liquid–liquid interfaces with gold nanofilms are detailed. Also, we outline an array of techniques to characterize these gold nanofilms in terms of their physiochemical properties (such as reflectivity, conductivity, catalytic activity, or plasmonic properties) and physical interfacial properties (for example, interparticle spacing and immersion depth at the interface). The ability of floating gold nanofilms to impact a diverse range of fields is demonstrated: in particular, redox electrocatalysis, surface-enhanced Raman spectroscopy (SERS) or surface plasmon resonance (SPR) based sensors, and electrovariable optical devices. Finally, perspectives on applications beyond the state-of-the-art are provided.
ISSN:0009-2665
1520-6890
DOI:10.1021/acs.chemrev.7b00595