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Title: Robust, high-density zinc oxide nanoarrays by nanoimprint lithography-assisted area-selective atomic layer deposition
Authors: Srinivasan, M. P.
Suresh, Vignesh
Huang, Meiyu Stella
Guan, Cao
Fan, Hong Jin
Krishnamoorthy, Sivashankar
Keywords: DRNTU::Science::Chemistry::Organic chemistry::Polymers
Issue Date: 2012
Source: Suresh, V., Huang, M. S., Srinivasan, M. P., Guan, C., Fan, H. J., & Krishnamoorthy, S. (2012). Robust, high-density zinc oxide nanoarrays by nanoimprint lithography-assisted area-selective atomic layer deposition. The Journal of Physical Chemistry C, 116(44), 23729-23734.
Series/Report no.: The journal of physical chemistry C
Abstract: Polymer templates realized through a combination of block copolymer lithography (BCL) and nanoimprint lithography (NIL) are used to direct atomic layer deposition (ALD) to obtain high-quality ZnO nanopatterns. These patterns present a uniform array of ZnO nanostructures with sub-100 nm feature and spatial resolutions, exhibiting narrow distributions in size and separation, and enhanced mechanical stability. The process benefits from the high lateral resolutions determined by the copolymer pattern, controlled growth rates, material quality and enhanced mechanical stability from ALD and repeatability and throughput from NIL. The protocol is generic and readily extendible to a range of other materials that can be grown through ALD. By virtue of their high feature density and material quality, the electrical characteristics of the arrays incorporated within MOS capacitors display high hole-storage density of 7.39 × 1018 cm–3, excellent retention of 97% (for 1000 s of discharging), despite low tunneling oxide thickness of 3 nm. These attributes favor potential application of these ZnO arrays as charge-storage centers in nonvolatile flash memory devices.
DOI: 10.1021/jp307152s
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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