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., . . . Weiss, P. S. (2017). Patterning of supported gold monolayers via chemical lift-off lithography. Beilstein Journal of Nanotechnology, 8, 2648-2661. doi: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

Open Access: Publication published in an 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

JUFO rating: 1