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Hydrophilic AgInZnS...
Hydrophilic AgInZnS quantum dots as a fluorescent turn-on probe for Cd2+ detection
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- Liu, Yong-feng (författare)
- Umeå universitet,Institutionen för fysik,Key Laboratory of Optoelectronic Technology & Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
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- Tang, Xiaosheng (författare)
- Chongqing University
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- Deng, Ming (författare)
- Chongqing University
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- Zhu, Tao (författare)
- Chongqing University
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- Edman, Ludvig, 1967- (författare)
- Umeå universitet,Institutionen för fysik
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- Wang, Jia (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Elsevier, 2021
- 2021
- Engelska.
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Ingår i: Journal of Alloys and Compounds. - : Elsevier. - 0925-8388 .- 1873-4669.
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://doi.org/10.1...
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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
- Quantum dots (QDs) are intensively studied and developed for the detection of toxic heavy metal ions, notably Cd2+. However, a severe drawback is that the probing QDs themselves often are based on highly toxic elements, such as Pb or Cd. Here, we report on a one-step aqueous synthesis of more benign and hydrophilic AgInZnS QDs using 3-mercaptopropionic acid as a ligand with a high photoluminescence quantum yield of up to 41%, which were successfully employed as a fluorescent probe with a turn-on mode for detection of Cd2+ in aqueous solutions. Specifically, we determine that the effective detection range of Cd2+ in aqueous solution is 0.1–290 μM, with the lower limit of detection being 37.8 nM. We further establish that the excellent turn-on detection of Cd2+ is due to that surface defects on the AgInZnS QDs are effectively passivated by the Cd2+, as verified by a prolonged fluorescent lifetime and an increased photoluminescence quantum yield. We finally demonstrate that the AgInZnS QD probe is capable of detecting Cd2+ in lake water samples, and that it meets the WHO standard.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- AgInZnS
- Quantum dots
- Fluorescence
- Probe
- Cd2+ detection
- Defect passivation
- Physical Chemistry
- fysikalisk kemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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