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Photoluminescence properties of quinary Ag–(In,Ga)–(S,Se) quantum dots with a gradient alloy structure for in vivo bioimaging
https://repo.qst.go.jp/records/84604
https://repo.qst.go.jp/records/84604a2a31f6e-cbcc-43e5-bf4f-4ec42f732326
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-11-13 | |||||
| タイトル | ||||||
| タイトル | Photoluminescence properties of quinary Ag–(In,Ga)–(S,Se) quantum dots with a gradient alloy structure for in vivo bioimaging | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Rismaningsih, Nurmanita
× Rismaningsih, Nurmanita× Yamauchi, Hiroki× Kameyama, Tatsuya× Yamamoto, Takahisa× Morita, Saho× Hiroshi, Yukawa× Uematsu, Taro× Yoshinobu, Baba× Kuwabata, Susumu× Torimoto, Tsukasa× Hiroshi, Yukawa× Yoshinobu, Baba |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Multinary semiconductor quantum dots (QDs) composed of group I–III–VI elements have received much attention for wide-ranging applications due to their low level of toxicity and tunable optical properties. The chemical composition and particle size are important parameters for controlling the physicochemical properties of these QDs. In this study, we prepared quinary QDs of an Ag–(In,Ga)–(S,Se) semiconductor (AIGSSe) by thermolysis of precursors in an organic solution with two-step heat treatment and evaluated their physicochemical properties as a function of Se fraction. The energy gap (Eg) of QDs decreased from 1.9 to 1.5 eV with an increase in the Se/(S + Se) ratio from 0 to 1, accompanied by a shift of the valence band maximum to a higher energy level. The obtained AIGSSe QDs exhibited a sharp band-edge PL peak, the wavelength of which was red-shifted from 580 to 790 nm with a decrease in their Eg. The PL intensity was remarkably enlarged by the surface coating with a GaSx shell, the highest PL quantum yield being 50% for the PL peak at 580 nm. AIGSSe QDs with an Se/(S + Se) ratio of 0.50 exhibited a near-IR PL peak at 790 nm, which is suitable for in vivo bioimaging in the wavelength range of the first biological window. By incorporating GaSx-coated AIGSSe QDs (Se/(S + Se) = 0.50) into liposomes, the QDs were transferred into aqueous solutions without significant deterioration of both the PL peak outline and quantum yield, though a broad PL peak originating from defect sites appeared with a relatively large PL intensity when GaSx-coated Ag–(In,Ga)–S QDs that did not contain Se were used. In vivo imaging of a mouse was successfully performed by detecting the band-edge emission at 790 nm of AIGSSe QDs injected subcutaneously in the back of the mouse. | |||||
| 書誌情報 |
Journal of Materials Chemistry C 巻 9, 号 37, p. 12791-12801, 発行日 2021-11 |
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| 出版者 | ||||||
| 出版者 | Royal Society of Chemistry | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2050-7526 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1039/D1TC02746H | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://pubs.rsc.org/en/content/articlelanding/2021/tc/d1tc02746h | |||||
