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Subwavelength direct laser patterning of conductive gold nanostructures by simultaneous photopolymerization and photoreduction

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/186247

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Title: Subwavelength direct laser patterning of conductive gold nanostructures by simultaneous photopolymerization and photoreduction
Related: ACS nano, Vol. 5, No. 3, (2011), p.1947-1957
DOI: 10.1021/nn103015g
Publisher: American Chemical Society
Date: 2011
Author/Creator: Shukla, Shobha
Author/Creator: Vidal, Xavier
Author/Creator: Furlani, Edward P
Author/Creator: Swihart, Mark T
Author/Creator: Kim, Kyoung-Tae
Author/Creator: Yoon, Yong-Kyu
Author/Creator: Urbas, Augustine
Description: This article presents a new method for fabricating highly conductive gold nanostructures within a polymeric matrix with subwavelength resolution. The nanostructures are directly written in a gold precursor-doped photoresist using a femtosecond pulsed laser. The laser energy is absorbed by a two-photon dye, which induces simultaneous reduction of gold in the precursor and polymerization of the negative photoresist. This results in gold nanoparticle-doped polymeric lines that exhibit both plasmonic effects, due to the constituent gold nanoparticles, and relatively high conductivity (within an order of magnitude of the bulk metal), due to the high density of particles within these lines. Line widths from 150 to 1000 nm have been achieved with this method. Various optically functional structures have been prepared, and their structural and optical properties have been characterized. The influence of laser intensity and scan speed on feature size have been studied and found to be in agreement with predictions of a mathematical model of the process.
Description: 11 page(s)
Subject Keyword: nanocomposites
Subject Keyword: two-photon lithography
Subject Keyword: metamaterials
Subject Keyword: gold nanostructures
Subject Keyword: nanofabrication
Resource Type: journal article
Organisation: Macquarie University. Dept. of Physics and Astronomy

Identifier: http://hdl.handle.net/1959.14/186247
Identifier: ISSN:1936-0851
Identifier: mq_res-20120918-153740
Language: eng
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