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Freestanding Ultrathin Nanoparticle Membranes Assembled at Transient Liquid-Liquid Interfaces

Le Ouay, B; Guldin, S; Luo, Z; Allegri, S; Stellacci, F; (2016) Freestanding Ultrathin Nanoparticle Membranes Assembled at Transient Liquid-Liquid Interfaces. Advanced Materials Interfaces , 3 (15) , Article 1601091. 10.1002/admi.201600191. Green open access

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Abstract

We present a synthetic route for the realization of ultrathin freestanding nanoparticle membranes that are built of gold nanoparticles protected with trimethoxysilane-bearing ligands. The mechanism relies on interfacial assembly in an oil-water mixture. Upon shaking, nanoparticles are transported to the liquid-liquid interface of the oil droplets and form a network through the formation of Si-O-Si bridges. Reticulation of the nanoparticles during the dynamic process of droplet coalescence allows the formation of ultrathin membranes of only a few NP-layers in thickness and square centimeters in dimension. The membranes can be manipulated, such as locally perforated, without causing their collapse. Furthermore they cqn be transferred onto solid or holey substrates. The synthetic route is compatible with a co-assembly of dopants. As an example, membranes were doped with single walled carbon nanotubes, which resulted in a sizable increase of their electric conductivity.

Type: Article
Title: Freestanding Ultrathin Nanoparticle Membranes Assembled at Transient Liquid-Liquid Interfaces
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/admi.201600191
Publisher version: http://dx.doi.org/10.1002/admi.201600191
Language: English
Additional information: This is the peer reviewed version of the following article: Le Ouay, B; Guldin, S; Luo, Z; Allegri, S; Stellacci, F; (2016) Freestanding Ultrathin Nanoparticle Membranes Assembled at Transient Liquid-Liquid Interfaces. Advanced Materials Interfaces, which has been published in final form at: http://dx.doi.org/10.1002/admi.201600191. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-828039.html#terms).
Keywords: Thin Film, Sol-gel, Monolayer, Self-assembly, Oil-Water Interface
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1478324
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