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Sulfur quantum dot ...
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Liu, Yong-fengUmeå universitet,Institutionen för fysik,College of Physical Science and Technology, Yangzhou University, Yangzhou, China; Microelectronics Industry Research Institute, Yangzhou University, Jiangsu, Yangzhou, China
(author)
Sulfur quantum dot as a fluorescent nanoprobe for Fe3+ ions : Uncovering of detection mechanism, high sensitivity, and large detection range
- Article/chapterEnglish2023
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Elsevier,2023
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LIBRIS-ID:oai:DiVA.org:umu-203971
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-203971URI
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https://doi.org/10.1016/j.jlumin.2023.119693DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Sulfur quantum dots (SQDs), as a novel metal-free fluorescent material, are getting increasingly tremendous attention in metal ion detection, especially for Fe3+, due to the merits of antimicrobial potential, low toxicity, and exciting optoelectronic properties. However, sensing mechanism of SQD based fluorescent probe for Fe3+ is not clear yet, and high sensitivity and large detection range remain a challenge. Here, we report the synthesis of hydrophilic SQDs as a fluorescent nanoprobe for Fe3+ via a fluorescent turn-off mode. We systematically studied the quenching mechanism by ultraviolet–visible absorption spectra, steady-state and time-resolved photoluminescent spectra, and temperature-dependent quenching constants. Results unclearly evidenced the quenching behavior to both inner filter effect and static quenching. Furthermore, the nanoprobe presents a large detection range from 2.5 to 700 μM and a limit of detection low to 53.6 nM, both of which are the record performance to our knowledge. At last, it shows high selectivity toward Fe3+ and presents no ionic strength effect in the range of investigation, which enables surprising results for Fe3+ detection in deionized water with interference ion and real water samples.
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Shao, XiuwenCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Gao, ZhaojuCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Zhu, XiaolinCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Pan, ZhangchengCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Ying, YupengCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Yang, JinpengCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Pei, WeiCollege of Physical Science and Technology, Yangzhou University, Yangzhou, China
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Wang, JiaUmeå universitet,Institutionen för fysik(Swepub:umu)jiwa0007
(author)
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Umeå universitetInstitutionen för fysik
(creator_code:org_t)
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In:Journal of Luminescence: Elsevier2570022-23131872-7883
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