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Your search keyword '"Hirai, Kenji"' showing total 7 results
Start Over Author "Hirai, Kenji" Journal chemical communications
7 results on '"Hirai, Kenji"'

1. A light-mediated covalently patterned graphene substrate for graphene-enhanced Raman scattering (GERS).

Author

Feng, Guilin, Suzuki, Nozomu, Zhang, Qiang, Li, Jiangtao, Inose, Tomoko, Taemaitree, Farsai, K. M., Muhammed Shameem, Toyouchi, Shuichi, Fujita, Yasuhiko, Hirai, Kenji, and Uji-i, Hiroshi

Subjects
RAMAN scattering, GRAPHENE, ACETIC acid
Abstract

We report covalently patterned graphene with acetic acid as a new potential candidate for graphene-enhanced Raman scattering (GERS). Rhodamine 6G molecules in direct contact with the covalently modified region show an enormous enhancement (∼25 times) compared to the pristine region at 532 nm excitation. The GERS enhancement with respect to the layer thickness of the probed molecule, excitation wavelength, and covalently attached groups is discussed. [ABSTRACT FROM AUTHOR]

Published
2023
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3. Multicolour photochromic fluorescence of a fluorophore encapsulated in a metal-organic framework

Author

Hirai, Kenji, Kitagawa, Taisei, Fujiwara, Hideki, Pirillo, Jenny, Hijikata, Yuh, Inose, Tomoko, and Uji-i, Hiroshi

Abstract

A fluorophore encapsulated in a metal-organic framework showed photochromic multicolour fluorescence. Irradiation with an ultraviolet laser induced the relocation of the fluorophore from a polar to a nonpolar environment, altering the emission from red to blue. This change in emission color can be repeatably recovered by heating the fluorophore-MOF composite.

Published
2020

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