Shi Yuting, Wang Jin, Li Shumin, Yan Bo, Xu Hui, Zhang Ke, Du Yukou
Soochow University, Suzhou, China.
Nanoscale Res Lett. 2017 Dec;12(1):455. doi: 10.1186/s11671-017-2225-3. Epub 2017 Jul 14.
In this work, a sensitive and novel method for determining uric acid (UA) has been developed, in which the glassy carbon electrode (GCE) was modified with electrodeposition Au nanoparticles and used to monitor the concentration of UA with the assistant of visible light illumination. The morphology of the Au nanoparticles deposited on GCE surface were characterized by scanning electron microscope (SEM) and the nanoparticles were found to be well-dispersed spheres with the average diameter approaching 26.1 nm. A series of cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurements have revealed that the introduction of visible light can greatly enhance both the strength and stability of response current due to the surface plasmon resonance (SPR). Specifically, the DPV showed a linear relationship between peak current and UA concentration in the range of 2.8 to 57.5 μM with the equation of I (μA) = 0.0121c (μM) + 0.3122 (R = 0.9987). Herein, the visible light illuminated Au/GCE possesses a potential to be a sensitive electrochemical sensor in the future.
在本研究中，开发了一种灵敏且新颖的测定尿酸（UA）的方法，其中玻碳电极（GCE）通过电沉积金纳米颗粒进行修饰，并在可见光照射辅助下用于监测UA浓度。通过扫描电子显微镜（SEM）对沉积在GCE表面的金纳米颗粒的形貌进行了表征，发现这些纳米颗粒为分散良好的球体，平均直径接近26.1nm。一系列循环伏安法（CV）和差分脉冲伏安法（DPV）测量表明，由于表面等离子体共振（SPR），引入可见光可大大增强响应电流的强度和稳定性。具体而言，DPV显示在2.8至57.5μM范围内，峰电流与UA浓度呈线性关系，方程为I（μA） = 0.0121c（μM） + 0.3122（R = 0.9987）。在此，可见光照射的Au/GCE未来有潜力成为一种灵敏的电化学传感器。
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