کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7229101 | 1470915 | 2018 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analyte induced AuNPs aggregation enhanced surface plasmon resonance for sensitive detection of paraquat
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Analyte induced AuNPs aggregation enhanced surface plasmon resonance for sensitive detection of paraquat Analyte induced AuNPs aggregation enhanced surface plasmon resonance for sensitive detection of paraquat](/preview/png/7229101.png)
چکیده انگلیسی
Paraquat (PQ) residue is harmful for people's health. This work fabricated an efficient approach to determine PQ sensitively. We exploited a novel surface plasmon resonance (SPR) detection system based on the analyte induced network architecture of supermolecules modified gold nanoparticles (AuNPs) on the chip surface. para-Sulfonatocalix[4]arene (pSC4) were used as a recognition molecule for paraquat. PQ can mediate the aggregation of pSC4 capped AuNPs (pSC4-AuNPs) through the host-guest recognition, which can be used as signal amplification for PQ assay. This achievement is due to several outstanding properties of this detection system: first, local SPR and high refractive index of AuNPs can enhance the signal of SPR dramatically; second, AuNPs is more stable and biocompatible and diffusely used in colorimetric methods; third, the network AuNPs structure has unique photo characterization for enhancement of SPR. Analyte induced AuNPs aggregation amplified SPR assay shows dramatic signal enhancement ability. The detection limit for PQ was found to be 2.2â¯pM This strategy provides a new concept for developing sensitive SPR sensors for the highly selective detection of small molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 117, 15 October 2018, Pages 605-612
Journal: Biosensors and Bioelectronics - Volume 117, 15 October 2018, Pages 605-612
نویسندگان
Haibin Dong, Fei Zou, Xiaojun Hu, Han Zhu, Kwangnak Koh, Hongxia Chen,