Stable ‘soap and water’ sponges doped with metal nanoparticles

Gaikwad, Anil V. and Verschuren, Peter and van der Loop, Tibert and Rothenberg, Gadi and Eiser, Erika (2009) Stable ‘soap and water’ sponges doped with metal nanoparticles. Soft Matter, 5 (10). pp. 1994-1999. ISSN 1744-683X DOI

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This paper presents various aspects of surfactant/oil/water L3 phases. Although these so-called sponge phases are usually stable only within a narrow temperature range, we show here that they can be stabilized over a larger phase space by doping with metal nanoparticle suspensions. We make and study sponge-phase samples doped with Au, Ag, and Pd aquasols and organosols. Remarkably, Pd-doped sponge phases are stable up to temperatures as high as 50 °C. Polarised microscopy studies as well as small-angle X-ray scattering measurements (SAXS) confirm that the nanoparticles are indeed incorporated in the sponge phase membrane. Moreover, rheological measurements show that, unlike the undoped samples, metal-doped sponge phases exhibit reversible phase transitions under shear stress. The various factors that control the stability and special optical properties of these metal-doped sponge phases are outlined and discussed.

Item Type: Article
Uncontrolled Keywords: 09AREP; BPI
Subjects: 99 - Other
Divisions: 99 - Other
Journal or Publication Title: Soft Matter
Volume: 5
Page Range: pp. 1994-1999
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 23 Jul 2010 11:11
Last Modified: 23 Jul 2013 09:57

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