Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 273, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2022.121048
Keywords
Fluorescent silicon nanoparticles; Sulfide ions; Detection; Cell imaging
Categories
Funding
- National College Students Innovation and Entrepreneurship Training Program [202110300010]
- Jiangsu Province College Students Innovation and Entrepreneurship Training Program [202110300014Z]
- College Students' Innovation and Entrepreneurship Training Program of NUIST [XJDC202110300158]
- Undergraduate Excellent Graduation Designing (Thesis) Supporting Program of Nanjing University of Information, Science and Techbology
- Startup Foundation for Introducing Talent of NUIST [2018r056]
- Jiangsu Province Natural Science Foundation [BK20201389]
- Qing Lan Project of the Jiangsu Higher Education Institutions of China [R2018Q03]
- Foundation of NUIST-UoR International Research Institute
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We have developed a hydrothermal method for synthesizing fluorescent silicon nanoparticles (F-SiNPs) with yellow-green emission, which showed excellent stability and good biocompatibility. By utilizing the specific reaction between S2- and 5,5'-dithiobis-(2-nitrobenzoic acid) (DTNB), a colorimetric assay for S2- was achieved. The F-SiNPs could be combined with the colorimetric detection system to construct a probe for fluorescence turn-off sensing S2- in aqueous solution due to inner filter effect.
We have presented a hydrothermal approach for synthesizing fluorescent silicon nanoparticles (F-SiNPs) with yellow-green emission. The obtained F-SiNPs exhibited excellent stability and good biocompatibility. By virtue of the specific reaction between S2- and 5,5'-dithiobis-(2-nitrobenzoic acid) (DTNB), colorimetric assay of S2- was realized with a good linear range of 0-100 mu M. The colorimetric detection system could be further combined with F-SiNPs to construct a probe for fluorescence turn-off sensing S2- in aqueous solution due to inner filter effect. In the fluorescent detection system, a good linearity with S2- concentration in the range of 0-50 mu M was accomplished. And as low as 0.1 mu M S2- was successfully detected. Moreover, the F-SiNPs displayed low cytotoxicity and good biocompatibility, and was further utilized for cell imaging. These results demonstrated the promising applications of F-SiNPs in S2- analysis and bioimaging. (C) 2022 Elsevier B.V. All rights reserved.
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