当前位置: X-MOL 学术J. Nanophotonics › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Detection technique for vitamin D3 using Er-doped TiO2 nanowire-based UV photodetector
Journal of Nanophotonics ( IF 1.5 ) Pub Date : 2020-10-08 , DOI: 10.1117/1.jnp.14.046001
Shyam M. M. Dhar Dwivedi 1 , Anupam Ghosh 1 , Sagarika Deepthy 2 , Moumita Maji 2 , Rini Lahiri 3 , Sanjib Mondal 1 , Chiranjib Ghosh 1 , Avijit Dalal 1 , Aniruddha Mondal 1 , Monidipa Ghosh 2
Affiliation  

Abstract. Vitamin D3 acts as a crucial biomarker for various diseases. Current methods for vitamin D3 detection are time-consuming, expensive, and require trained personnel. We report a simple and cheap photodetector (PD)-based vitamin D3 detection technique for the first time using Ag nanoparticles-covered Er-doped TiO2 nanowires. The operational stability of the device was tested under the dark as well as the UV light illumination. Vitamin D3 solution produced absorption bands at 222 and 280 nm, respectively. The PD current density varied from 1.29 × 10 − 4 A / cm2 to 1.74 × 10 − 4 at −4 V for pure ethanol solution and 20 pg / ml D3 solution, respectively (under 220 nm illumination). The average absolute current values were reduced from 3.25 nA (220 nm) and 2.9 nA (340 nm) for 5 pg / ml to 2.95 nA (220 nm) and 2.54 nA (340 nm) for 30 pg / ml D3 solution, respectively. The current gradually increased up to 3.34 nA (220 nm) and 2.7 nA (340 nm) as the concentration was increased up to 80 pg / ml. The PD current/vitamin D3 concentration decreases exponentially from 0.58 to 0.03 nA / g / ml) for 5 and 80 pg / ml, respectively, under 220 nm excitation, from which an unknown concentration of vitamin D3 can be obtained.

中文翻译:

基于Er掺杂TiO2纳米线的紫外光电探测器对维生素D3的检测技术

摘要。维生素 D3 是多种疾病的重要生物标志物。目前检测维生素 D3 的方法耗时、昂贵,并且需要经过培训的人员。我们首次报告了一种简单且廉价的基于光电探测器 (PD) 的维生素 D3 检测技术,该技术使用银纳米颗粒覆盖的 Er 掺杂 TiO2 纳米线。在黑暗和紫外光照射下测试了设备的运行稳定性。维生素 D3 溶液分别在 222 和 280 nm 处产生吸收带。对于纯乙醇溶液和 20 pg/ml D3 溶液(在 220 nm 光照下),PD 电流密度分别从 1.29 × 10 - 4 A / cm2 变化到 -4 V 下的 1.74 × 10 - 4。平均绝对电流值从 5 pg/ml 的 3.25 nA (220 nm) 和 2.9 nA (340 nm) 降低到 2.95 nA (220 nm) 和 2。30 pg/ml D3 溶液分别为 54 nA (340 nm)。随着浓度增加到 80 pg/ml,电流逐渐增加到 3.34 nA (220 nm) 和 2.7 nA (340 nm)。在 220 nm 激发下,PD 电流/维生素 D3 浓度分别从 0.58 至 0.03 nA/g/ml 呈指数下降,分别为 5 和 80 pg/ml,从中可以获得未知浓度的维生素 D3。
更新日期:2020-10-08
down
wechat
bug