A1 Journal article (refereed)
Patterning of supported gold monolayers via chemical lift-off lithography (2017)

Slaughter, L. S., Cheung, K. M., Kaappa, S., Cao, H. H., Yang, Q., Young, T. D., Serino, A. C., Malola, S., Olson, J. M., Link, S., Häkkinen, H., Andrews, A. M., & Weiss, P. S. (2017). Patterning of supported gold monolayers via chemical lift-off lithography. Beilstein Journal of Nanotechnology, 8, 2648-2661. https://doi.org/10.3762/bjnano.8.265

JYU authors or editors

Publication details

All authors or editors: Slaughter, Liane S.; Cheung, Kevin M.; Kaappa, Sami; Cao, Huan H.; Yang, Qing; Young, Thomas D.; Serino, Andrew C.; Malola, Sami; Olson, Jana M.; Link, Stephan; et al.

Journal or series: Beilstein Journal of Nanotechnology

ISSN: 2190-4286

eISSN: 2190-4286

Publication year: 2017

Volume: 8

Issue number: 0

Pages range: 2648-2661

Publisher: Beilstein-Institut

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.3762/bjnano.8.265

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/56583

Additional information: This article is part of the Thematic Series "Nanoscale patterning and characterization".

Abstract

The supported monolayer of Au that accompanies alkanethiolate molecules removed by polymer stamps during chemical lift-off lithography is a scarcely studied hybrid material. We show that these Au-alkanethiolate layers on poly(dimethylsiloxane) (PDMS) are transparent, functional, hybrid interfaces that can be patterned over nanometer, micrometer, and millimeter length scales. Unlike other ultrathin Au films and nanoparticles, lifted-off Au-alkanethiolate thin films lack a measurable optical signature. We therefore devised fabrication, characterization, and simulation strategies by which to interrogate the nanoscale structure, chemical functionality, stoichiometry, and spectral signature of the supported Au-thiolate layers. The patterning of these layers laterally encodes their functionality, as demonstrated by a fluorescence-based approach that relies on dye-labeled complementary DNA hybridization. Supported thin Au films can be patterned via features on PDMS stamps (controlled contact), using patterned Au substrates prior tolift-off (e.g., selective wet etching), or by patterning alkanethiols on Au substrates to be reactive in selected regions but not others (controlled reactivity). In all cases, the regions containing Au-alkanethiolate layers have a sub-nanometer apparent height, which was found to be consistent with molecular dynamics simulations that predicted the removal of no more than 1.5 Au atoms per thiol, thus presenting a monolayer-like structure.

Keywords: nanostructures; thin films

Free keywords: chemical patterning; hybrid material; monolayer; soft lithography; two-dimensional material

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Ministry reporting: Yes

Reporting Year: 2017

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