Nano-Micro Letters, Volume. 16, Issue 1, 192(2024)
Facile Semiconductor p–n Homojunction Nanowires with Strategic p-Type Doping Engineering Combined with Surface Reconstruction for Biosensing Applications
Photosensors with versatile functionalities have emerged as a cornerstone for breakthroughs in the future optoelectronic systems across a wide range of applications. In particular, emerging photoelectrochemical (PEC)-type devices have recently attracted extensive interest in liquid-based biosensing applications due to their natural electrolyte-assisted operating characteristics. Herein, a PEC-type photosensor was carefully designed and constructed by employing gallium nitride (GaN) p–n homojunction semiconductor nanowires on silicon, with the p-GaN segment strategically doped and then decorated with cobalt–nickel oxide (CoNiOx). Essentially, the p–n homojunction configuration with facile p-doping engineering improves carrier separation efficiency and facilitates carrier transfer to the nanowire surface, while CoNiOx decoration further boosts PEC reaction activity and carrier dynamics at the nanowire/electrolyte interface. Consequently, the constructed photosensor achieves a high responsivity of 247.8 mA W-1 while simultaneously exhibiting excellent operating stability. Strikingly, based on the remarkable stability and high responsivity of the device, a glucose sensing system was established with a demonstration of glucose level determination in real human serum. This work offers a feasible and universal approach in the pursuit of high-performance bio-related sensing applications via a rational design of PEC devices in the form of nanostructured architecture with strategic doping engineering.
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Liuan Li, Shi Fang, Wei Chen, Yueyue Li, Mohammad Fazel Vafadar, Danhao Wang, Yang Kang, Xin Liu, Yuanmin Luo, Kun Liang, Yiping Dang, Lei Zhao, Songrui Zhao, Zongzhi Yin, Haiding Sun. Facile Semiconductor p–n Homojunction Nanowires with Strategic p-Type Doping Engineering Combined with Surface Reconstruction for Biosensing Applications[J]. Nano-Micro Letters, 2024, 16(1): 192
Category: Research Articles
Received: Jan. 31, 2024
Accepted: Mar. 11, 2024
Published Online: Jan. 23, 2025
The Author Email: Yin Zongzhi (yinzongzhi@ahmu.edu.cn), Sun Haiding (haiding@ustc.edu.cn)