期刊
LASER & PHOTONICS REVIEWS
卷 16, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.202200197
关键词
bioimaging and phototherapy; plasmonic semiconductors; surface plasmon resonance; temperature sensing; upconversion emission enhancement
资金
- National Natural Science Foundation of China [11904133, 22175076, 51872125]
- Guangdong Basic and Applied Basic Research Foundation [2022A1515011378]
- Guangzhou Basic and Applied Basic Research Foundation [202102020217]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2018B030306004]
- GDUPS (2018)
- Ministry of Education Singapore [2021-T1-002-012, RG65/21]
In this work, plasmonic bismuth tungstate nanosheets were constructed to enhance the emission of upconversion nanoparticles. The hybrids showed significant enhancement in emission and acted as a high-sensitivity thermometer for monitoring local temperature. Furthermore, the plasmonic hybrids demonstrated potential applications in cancer photothermal therapy and bioimaging.
Plasmonic semiconductor nanoparticles (NPs) with wide-range tailorable localized surface plasmon resonance (LSPR) hold exciting prospects on optical signal amplification. In this work, by precisely controlling oxygen vacancies around W atoms, plasmonic bismuth tungstate Bi2WO6 (BWO) nanosheets are constructed to enhance emission of Yb3+/Er3+ co-doped NaYF4 upconversion nanoparticles (UCNPs). In the optimal conditions, the UCNPs/BWO-2 hybrids exhibit over three-order (1260-fold) enhancement selectively on the 520 nm emission owing to the strong LSPR-induced electrical field and photothermal effect. Moreover, it is found that the highly efficient emission of UCNPs/BWO-2 allows it to act as a thermometer to monitor the real-time local temperature with high absolute sensitivity of 5.8 x 10(-3) K-1 in wide temperature range (up to 990 K). For proof-of-concept, the dual functions of plasmonic UCNPs/BWO-2 hybrids on bioimaging and photothermal therapy for cancer cells are demonstrated that can be completely killed within 5 min under 980 nm irradiation. As far as it is known, this work reaches a new level on UCNPs emission enhancement by plasmonic semiconductor, exceeding most plasmonic metals.
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