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Sulfur quantum dot ...
Sulfur quantum dot as a fluorescent nanoprobe for Fe3+ ions : Uncovering of detection mechanism, high sensitivity, and large detection range
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- Liu, Yong-feng (författare)
- Umeå universitet,Institutionen för fysik,College of Physical Science and Technology, Yangzhou University, Yangzhou, China; Microelectronics Industry Research Institute, Yangzhou University, Jiangsu, Yangzhou, China
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- Shao, Xiuwen (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Gao, Zhaoju (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Zhu, Xiaolin (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Pan, Zhangcheng (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Ying, Yupeng (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Yang, Jinpeng (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Pei, Wei (författare)
- College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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- Wang, Jia (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Elsevier, 2023
- 2023
- Engelska.
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Ingår i: Journal of Luminescence. - : Elsevier. - 0022-2313 .- 1872-7883. ; 257
- Relaterad länk:
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- Detection mechanism
- Fe3+ detection
- Fluorescent quenching
- Inner filter effect
- Static quenching
- Sulfur quantum dots
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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