Sonochemical reaction to control the near-infrared photoluminescence properties of single-walled carbon nanotubes

Yutaka Maeda, Yui Konno, Akane Nishino, Michio Yamada, Saki Okudaira, Yuhei Miyauchi, Kazunari Matsuda, Jun Matsui, Masaya Mitsuishi, Mitsuaki Suzuki

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    The effect of ultrasonic irradiation on the optical properties of single-walled carbon nanotubes (SWNTs) was investigated. Upon sonication in D2O in the presence of sodium dodecylbenzene sulfonate (SDBS) under air, red-shifted photoluminescence (PL) peaks at ∼1043 and ∼1118 nm were observed from the aqueous suspensions of (6,4) and (6,5)SWNTs, accompanied by a decrease in the intensity of the intrinsic PL peaks. Upon sonication with SDBS under an Ar atmosphere, the rate of spectral change increased with the sonication time and new PL peaks emerged at 1043, 1118, and 1221 nm. Meanwhile, upon the addition of 1-butanol, the PL peaks emerged only at 1043 nm and 1118 nm, while the emergence of the peak at 1221 nm was inhibited. On the other hand, a suspension with highly dispersed SWNTs was obtained upon sonication in the presence of sodium cholate without any change in the intrinsic optical properties of SWNTs. These experimental results reveal that the PL characteristics of SWNTs can be controlled by controlling the sonication conditions such as the type of surfactant used, the concentration of SWNTs, reaction environment, and the presence of an inhibitor such as 1-butanol.

    Original languageEnglish
    Pages (from-to)6263-6270
    Number of pages8
    JournalNanoscale
    Volume12
    Issue number11
    DOIs
    Publication statusPublished - 2020 Mar 21

    ASJC Scopus subject areas

    • Materials Science(all)

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