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Spacer-Defined Intrinsic Multiple Patterning

Laney, SK; Li, T; Michalska, M; Ramirez, F; Portnoi, M; Oh, J; Tiwari, MK; ... Papakonstantinou, I; + view all (2020) Spacer-Defined Intrinsic Multiple Patterning. ACS Nano , 14 (9) pp. 12091-12100. 10.1021/acsnano.0c05497. Green open access

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Abstract

Periodic nanotube arrays render enhanced functional properties through their interaction with light and matter, but to reach optimal performance for technologically prominent applications, such as wettability or photonics, structural fine-tuning is essential. Nonetheless, a universal and scalable method providing independent dimension control, high aspect ratios, and the prospect of further structural complexity remains unachieved. Here, we answer this need through an atomic layer deposition (ALD)-enabled multiple patterning. Unlike previous methods, the ALD-deposited spacer is applied directly on the prepatterned target substrate material, serving as an etching mask to generate a multitude of tailored nanotubes. By concept iteration, we further realize concentric and/or binary nanoarrays in a number of industrially important materials such as silicon, glass, and polymers. To demonstrate the achieved quality and applicability of the structures, we probe how nanotube fine-tuning induces broadband antireflection and present a surface boasting extremely low reflectance of <1% across the wavelength range of 300–1050 nm.

Type: Article
Title: Spacer-Defined Intrinsic Multiple Patterning
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsnano.0c05497
Publisher version: https://doi.org/10.1021/acsnano.0c05497
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Etching, Nanotubes, Chemical structure, Deposition, Silicon
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10109230
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