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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.1c02423
|2 doi
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|a pubmed24n1112.xml
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|a (DE-627)NLM333879996
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Gong, Ling
|e verfasserin
|4 aut
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| 245 |
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|a Ultrasensitive Electrochemical Impedance Chiral Discrimination and Sensing of Tryptophan Isomers Based on Core-Shell-Structured Au-Ag Nanoparticles
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 27.01.2022
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|a Date Revised 27.01.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Au-Ag nanoparticles (Au-Ag NPs) with a core-shell structure are prepared and used for ultrasensitive electrochemical impedance (EI) discrimination of the isomers of tryptophan (Trp). As revealed by circular dichroism, rotary polarization caused by the Au-Ag NPs is consistent with D-Trp but opposite to L-Trp, and thus, the Au-Ag NPs can selectively combine with D-Trp through preferential interactions. Compared with Au-Ag NPs, the composites of D-Trp and Au-Ag NPs (Au-Ag NPs/D-Trp) display significantly increased charge transfer resistance (Rct); differently, the Rct of Au-Ag NPs/L-Trp remains almost unchanged because the Au-Ag NPs exhibit poor affinity toward L-Trp. Therefore, ultrasensitive EI enantiodiscrimination of the isomers of Trp is realized even at an extremely low concentration of the Trp isomers (0.1 nM). In addition, it is successfully applied in the ultrasensitive determination of D-Trp at a low concentration level (0.1 nM∼10 μM)
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Silver
|2 NLM
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|a 3M4G523W1G
|2 NLM
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|a Gold
|2 NLM
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|a 7440-57-5
|2 NLM
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|a Tryptophan
|2 NLM
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|a 8DUH1N11BX
|2 NLM
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|a Zhao, Qianqian
|e verfasserin
|4 aut
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|a Wu, Shanshan
|e verfasserin
|4 aut
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| 700 |
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|a Yin, Zheng-Zhi
|e verfasserin
|4 aut
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| 700 |
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|a Wu, Datong
|e verfasserin
|4 aut
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| 700 |
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|a Cai, Wenrong
|e verfasserin
|4 aut
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| 700 |
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|a Kong, Yong
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 37(2021), 49 vom: 14. Dez., Seite 14454-14462
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:37
|g year:2021
|g number:49
|g day:14
|g month:12
|g pages:14454-14462
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|u http://dx.doi.org/10.1021/acs.langmuir.1c02423
|3 Volltext
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