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Influence of the Tip Shape on Scanning Tunneling Luminescence Spectra: Implications for Nanomaterial Characterization

Title
Influence of the Tip Shape on Scanning Tunneling Luminescence Spectra: Implications for Nanomaterial Characterization
Authors
CUI, SONGBINKIM, TAE HWANHAM, UNGDON
Date Issued
Jan-2021
Publisher
AMER CHEMICAL SOC
Abstract
Scanning tunneling luminescence (STL) provides a unique opportunity to determine the optical properties of nanostructures beyond the diffraction limit. However, the relationship between the STL spectra and nanoscale tip shapes remains poorly understood because of the uncertainty regarding the nanoscale tip geometry. Here, we provide direct experimental evidence supporting a relationship between the tip shapes and resulting STL spectra. We find that asymmetric nanoscale tips generated dissimilar STL spectra in different directions by simultaneously collecting STL spectra in two opposing directions. Our experiment provides an efficient way to tune the STL spectra, which can be used to characterize the optical properties of nanomaterials.
Keywords
Diffraction; Luminescence; Nanostructured materials; Diffraction limits; Experimental evidence; Nanoscale tip; Optical properties of nanostructures; Scanning tunneling luminescences; Tip shape; Optical properties
URI
http://oasis.postech.ac.kr/handle/2014.oak/104911
ISSN
2574-0970
Article Type
Article
Citation
Acs Applied Nano Materials, vol. 4, no. 1, page. 29 - 32, 2021-01
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