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Electrochemical sensor based on CuSe for determination of dopamine
Microchimica Acta ( IF 5.7 ) Pub Date : 2020-07-11 , DOI: 10.1007/s00604-020-04405-5
Siddesh Umapathi 1 , Jahangir Masud 1 , Holly Coleman 2 , Manashi Nath 1
Affiliation  

A simple binary copper selenide, CuSe nanostructure, has been investigated as electrochemical sensor for dopamine detection. The hydrothermally synthesized and electrodeposited CuSe nanostructures showed high sensitivity for dopamine detection with low limit of detection (LOD). A sensitivity of 26 μA/μM.cm 2 was obtained with this electrochemical sensor which is ideal to detect even small fluctuations in the transient dopamine concentration. Apart from high sensitivity and low LOD, the dopamine oxidation on the catalyst surface also occurred at a low applied potential (< 0.18 V vs Ag|AgCl), thereby significantly increasing selectivity of the process specifically with respect to ascorbic and uric acids, which are considered to be the most prominent interferents for dopamine detection. Electrochemical redox tunability of the catalytic Cu center along with low coordination geometry is believed to enhance the rate of dopamine attachment and oxidation on the catalyst surface thereby reducing the applied potential. The presence of Cu also increases conductivity of the catalyst composite which further improves the charge transfer thus increasing the sensitivity of the device. This is the first report of electrochemical dopamine sensing with a simple binary selenide comprising earth-abundant elements and can have large significance in designing efficient sensors that can be transformative for understanding neurodegenerative diseases further. Graphical abstract

中文翻译:

基于CuSe的电化学传感器测定多巴胺

一种简单的二元硒化铜 CuSe 纳米结构已被研究作为多巴胺检测的电化学传感器。水热合成和电沉积的 CuSe 纳米结构对多巴胺检测显示出高灵敏度和低检测限 (LOD)。这种电化学传感器获得了 26 μA/μM.cm 2 的灵敏度,非常适合检测瞬态多巴胺浓度的微小波动。除了高灵敏度和低 LOD 外,催化剂表面的多巴胺氧化也在低外加电位(< 0.18 V vs Ag|AgCl)下发生,从而显着提高了该过程的选择性,特别是针对抗坏血酸和尿酸,它们是被认为是多巴胺检测最突出的干扰物。催化Cu中心的电化学氧化还原可调性以及低配位几何被认为提高了催化剂表面上多巴胺附着和氧化的速率,从而降低了施加的电位。Cu的存在还增加了催化剂复合物的电导率,这进一步改善了电荷转移,从而增加了装置的灵敏度。这是用包含地球丰富元素的简单二元硒化物进行电化学多巴胺传感的第一份报告,在设计有效传感器方面具有重要意义,这些传感器可以为进一步了解神经退行性疾病带来变革。图形概要 Cu的存在还增加了催化剂复合物的电导率,这进一步改善了电荷转移,从而增加了装置的灵敏度。这是用包含地球丰富元素的简单二元硒化物进行电化学多巴胺传感的第一份报告,在设计有效传感器方面具有重要意义,这些传感器可以为进一步了解神经退行性疾病带来变革。图形概要 Cu的存在还增加了催化剂复合物的电导率,这进一步改善了电荷转移,从而增加了装置的灵敏度。这是用包含地球丰富元素的简单二元硒化物进行电化学多巴胺传感的第一份报告,在设计有效传感器方面具有重要意义,这些传感器可以为进一步了解神经退行性疾病带来变革。图形概要 这是用包含地球丰富元素的简单二元硒化物进行电化学多巴胺传感的第一份报告,在设计有效传感器方面具有重要意义,这些传感器可以为进一步了解神经退行性疾病带来变革。图形概要 这是用包含地球丰富元素的简单二元硒化物进行电化学多巴胺传感的第一份报告,在设计有效传感器方面具有重要意义,这些传感器可以为进一步了解神经退行性疾病带来变革。图形概要
更新日期:2020-07-11
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