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Multifunctional Nanostructures and Nanopocket Particles Fabricated by Nanoimprint Lithography

1
AIT Austrian Institute of Technology, Molecular Diagnostics, 1210 Vienna, Austria
2
PROFACTOR GmbH, 4407 Steyr, Austria
3
Department for Integrated Sensor Systems, Danube University Krems, 2700 Wiener Neustadt, Austria
4
AIT Austrian Institute of Technology, Photovoltaic Systems, 1210 Vienna, Austria
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(12), 1790; https://doi.org/10.3390/nano9121790
Received: 17 November 2019 / Revised: 9 December 2019 / Accepted: 12 December 2019 / Published: 16 December 2019
(This article belongs to the Section Synthesis, Interfaces and Nanostructures)
Nanostructured surfaces and nanoparticles are already widely employed in many different fields of research, and there is an ever-growing demand for reliable, reproducible and scalable nanofabrication methods. This is especially valid for multifunctional nanomaterials with physical properties that are tailored for specific applications. Here, we report on the fabrication of two types of nanomaterials. Specifically, we present surfaces comprising a highly uniform array of elliptical pillars as well as nanoparticles with the shape of nanopockets, possessing nano-cavities. The structures are fabricated by nanoimprint lithography, physical and wet-chemical etching and sputter deposition of thin films of various materials to achieve a multifunctional nanomaterial with defined optical and magnetic properties. We show that the nanopockets can be transferred to solution, yielding a nanoparticle dispersion. All fabrication steps are carefully characterized by microscopic and optical methods. Additionally, we show optical simulation results that are in good agreement with the experimentally obtained data. Thus, this versatile method allows to fabricate nanomaterials with specific tailor-made physical properties that can be designed by modelling prior to the actual fabrication process. Finally, we discuss possible application areas of these nanomaterials, which range from biology and medicine to electronics, photovoltaics and photocatalysis. View Full-Text
Keywords: nanoimprint lithography; nanostructure; nanocavity; nanoparticle; multifunctional nanoparticle; magnetic nanoparticle; plasmonic nanoparticle nanoimprint lithography; nanostructure; nanocavity; nanoparticle; multifunctional nanoparticle; magnetic nanoparticle; plasmonic nanoparticle
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MDPI and ACS Style

Schrittwieser, S.; Haslinger, M.J.; Mitteramskogler, T.; Mühlberger, M.; Shoshi, A.; Brückl, H.; Bauch, M.; Dimopoulos, T.; Schmid, B.; Schotter, J. Multifunctional Nanostructures and Nanopocket Particles Fabricated by Nanoimprint Lithography. Nanomaterials 2019, 9, 1790.

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