Mercaptopropionic acid capped cadmium selenide quantum dots based urea Biosensor

被引：4

作者：

Sajwan, Reena K. ^{[1
]}

Sharma, Purnima ^{[1
]}

Lakshmi, G. B. V. S. ^{[1
]}

Solanki, Pratima R. ^{[1
]}

机构：

[1] Jawaharlal Nehru Univ, Special Ctr Nanosci, New Delhi 110067, India

来源：

MATERIALS LETTERS | 2021年 / 305卷

关键词：

Quantum dots; Fluorescence; Urea; Urease; pH value; GLUCOSE;

D O I：

10.1016/j.matlet.2021.130794

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Here a simple fluorescence "Turn-On" based strategy is used for the determination of urea using water soluble mercaptopropionic acid capped cadmium selenide quantum dots (MPA-CdSe QDs). These MPA-CdSe QDs were pH sensitive and this property is used for urea detection after the immobilization of urease. The principle of detection is to measure and correlate the enhancement of fluorescence intensity of MPA-CdSe QDs caused by the enzymatic reaction between urease with urea and release of ammonia. Ammonia release leads to raise in the pH value which turns on the fluorescence intensity of MPA-CdSe QDs in the presence of increasing concentration of urea varying from 1 to 120 mM with a lower detection limit of 1 mM.

引用

页数：4

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