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Issue 1, 2013
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Thiol-containing polymeric embedding materials for nanoskiving

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This paper describes the characterization of new embedding resins for nanoskiving (ultramicrotomy) that contain thiols. Nanoskiving is a technique to produce nanoscale structures using an ultramicrotome to section thin films of materials (e.g., gold) embedded in polymer. Epoxies are used typically as embedding resins for microtomy. Epoxies, however, do not adhere well to gold or other smooth metallic structures that are used commonly for nanoskiving. Thiol–ene and thiol–epoxy polymers provide improved adhesion to gold due to the thiol functional group. In addition, the thiol–ene polymers can be prepared within minutes using photopolymerization, which allows for rapid prototyping. Two commercial thiol-containing adhesives were evaluated as resins in addition to several formulations of commercially available monomers. The important physical and mechanical properties for microtomy of these unconventional embedding resins were characterized and the properties were compared to commercial epoxy resins. Gold nanowires were fabricated using nanoskiving of gold films embedded in these unconventional resins. These studies show that a 3 : 4 mixture of thiol (pentaerythritol tetra(3-mercaptopropionate)) and ene (triallyl-1,3,5-triazine-2,4,6-trione) works very well as a resin for nanoskiving and provides improved adhesion and reduced preparation time relative to epoxies.

Graphical abstract: Thiol-containing polymeric embedding materials for nanoskiving

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Publication details

The article was received on 22 Aug 2012, accepted on 18 Oct 2012 and first published on 25 Oct 2012

Article type: Paper
DOI: 10.1039/C2TC00030J
Citation: J. Mater. Chem. C, 2013,1, 121-130

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    Thiol-containing polymeric embedding materials for nanoskiving

    R. L. Mays, P. Pourhossein, D. Savithri, J. Genzer, R. C. Chiechi and M. D. Dickey, J. Mater. Chem. C, 2013, 1, 121
    DOI: 10.1039/C2TC00030J

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