Rapid Screen for Antiviral T‐Cell Immunity with Nanowire Electrochemical Biosensors (Adv. Mater. 29/2022)

Nami, Mohsen; Han, Patrick; Hanlon, Douglas; Tatsuno, Kazuki; Weinhammer, Annika; Sobolev, Olga; Pitruzzello, Mary; Vassall, Aaron; Yosinski, Shari; Edelson, Richard L.; Reed, Mark A.

doi:10.1002/adma.202270213

Cited by 1 publication

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“…In the exploration of efficient biosensors, responsivity and stability stand as key characteristics, exerting a direct influence on the overall sensing performance in various application scenarios [ 17 ]. Concretely, high responsivity ensures that sensors can acutely capture the change of target substance, while high stability guarantees that sensors can operate continually and reliably in complex electrolyte-related working conditions [ 18 , 19 ]. However, how to achieve high responsivity and high stability in PEC-type photosensors remains a challenge to ensure optimal sensing performance [ 13 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Semiconductor p–n Homojunction Nanowires with Strategic p-Type Doping Engineering Combined with Surface Reconstruction for Biosensing Applications

Li,

Fang,

Chen

et al. 2024

Nano-Micro Lett.

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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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