کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
13449391 | 1843873 | 2020 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electroactive NPs and D-amino acids oxidase engineered electrochemical chiral sensor for D-alanine detection
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electroactive NPs and D-amino acids oxidase engineered electrochemical chiral sensor for D-alanine detection Electroactive NPs and D-amino acids oxidase engineered electrochemical chiral sensor for D-alanine detection](/preview/png/13449391.png)
چکیده انگلیسی
A simple and accurate magnetic electrochemical sensor is developed for the ultrasensitive chiral recognition of D-amino acids (D-AAs). Fe3O4@[email protected]@CuxO nanoparticles (NPs) (xâ=â1, 2) are controllable prepared and used as the electrochemical beacons. The controllable integration of plasmonic metal NPs, semiconductors and magnetic NPs enables multilayered Fe3O4@[email protected]@CuxO NPs to display a sharp copper stripping peak at -0.16âV, owning to the electron transfer from Cu+ to Cu2+ and the synergistic electron transfer of Au and Ag double layers. D-AAs can be catalyzed by D-amino acid oxidase (DAAO) to produce H2O2. The autocatalytic oxidation reaction of CuxO shell with the existence of H2O2 induces the decrease of electrochemical signals of Fe3O4@[email protected]@CuxO NPs. Fe3O4@[email protected]@CuxO NPs served as electrochemical beacons achieve the sensitive and accurate enantioselective recognition of D-alanine (D-Ala) in the range from 100âpM to 10âμM. The limit of detection (LOD) is as low as 52âpM. This developed protocol can be extended to the fabrication of a large set of electroactive labels by the introduction of plasmonic metal NPs with high electron transfer efficiency, for the reliable enantioselective recognition with high sensitivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 304, 1 February 2020, 127333
Journal: Sensors and Actuators B: Chemical - Volume 304, 1 February 2020, 127333
نویسندگان
Han Liu, Juanjuan Shao, Lixia Shi, Wei Ke, Fangjie Zheng, Yuan Zhao,