Journal
NANO TODAY
Volume 38, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.nantod.2021.101145
Keywords
Multiple nanostructures; Atomic layer deposition; 3D nanofabrication; Metasurface; Gas sensor
Categories
Funding
- National Key R&D Program of China [2016YFA0200800, 2016YFA0200400]
- Natural Science Foundation of China (NSFC) [12074420, 61888102, 11674387, 61905274]
- Key Research Program of Frontier Sciences of CAS [QYZDJ-SSW-SLH042]
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The atomic layer assembled nanofabrication based on soft-templates breaks through traditional limitations, providing scalability and powerful fabrication capability for generating complex multiple nanostructures.
Nanodevices have higher requirements for nanofabrication in tuning the size, shape and spatial arrangement of nanostructures and their assemblies in nanoscale, however, which are often beyond the reach of conventional lithography or self-assembly techniques. In view of the above, we develop atomic layer assembled nanofabrication based on soft-templates to break through the limitations of traditional rigid templates, having very well scalability and powerful fabrication capability for multiple solid or hollow nanostructures. Versatile soft-templates can be freely patterned at the nanoscale by mature lithographic processes, along which a precisely controlled atomic layer deposition can assemble high-aspect-ratio nanostructures with a flexible tailoring of the size, shape and spatial array, and then a dry etching process removes soft scaffolds and leaves freestanding nanostructures over large-area, rigid or soft substrates. To highlight the potentials of this fabrication strategy, the high-performance optical metasurface and ultra sensitive H-2 gas sensor are demonstrated. This approach endows the conventional lithography and assembly techniques with new powerful functionalities and more scalability in nanofabrication, providing a simply promising route to generating complex multiple nanostructures, towards a broad application in modern nanodevices. (C) 2021 Elsevier Ltd. All rights reserved.
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