Temperature dependence of photoluminescence spectra from a suspended single-walled carbon nanotube with water adsorption layer

On a single-walled carbon nanotube (SWCNT) surface, water forms a peculiar adsorption layer comprising two monolayers, and the physical properties of this adsorption layer remain unclear. We studied the changes that occurred in this water adsorption layer from room temperature down to 140 K using ph...

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Bibliographic Details
Published in:Journal of applied physics 2021-01, Vol.129 (1)
Main Authors: Saito, Yuta, Tanaka, Yuichiro, Yamaguchi, Genta, Kato, Takashi, Konabe, Satoru, Chiashi, Shohei, Homma, Yoshikazu
Format: Article
Language:English
Subjects:
Adsorbed water
Adsorption
Applied physics
Chirality
Photoluminescence
Physical properties
Room temperature
Single wall carbon nanotubes
Spectrum analysis
Temperature dependence
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Summary:On a single-walled carbon nanotube (SWCNT) surface, water forms a peculiar adsorption layer comprising two monolayers, and the physical properties of this adsorption layer remain unclear. We studied the changes that occurred in this water adsorption layer from room temperature down to 140 K using photoluminescence (PL) spectroscopy of suspended SWCNTs. The PL emission energy exhibited complex changes with temperature depending on the chirality of the SWCNTs. These changes were described quantitatively on the basis of changes in the bandgap, the dielectric constant of the adsorption layer, and the strain imposed by the adsorption layer. The results suggested that the adsorption layer might be a two-dimensional disordered solid rather than a liquid.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0031611