Surface Plasmon-Enhanced Photoelectrochemical Sensor Based on Au Modified TiO2 Nanotubes

Based on the enhanced charge separation efficiency of the one-dimensional structure and strong surface plasmon resonance (SPR) of gold, a gold modified TiO2 nanotube (Au/TiO2NTs) glucose photoelectrochemical (PEC) sensor was prepared. It could be activated by visible red light (625 nm). Under optimal conditions, the Au/TiO2NTs sensor exhibited a good sensitivity of 170.37 mu A center dot mM(-1) center dot cm(-2) in the range of 1-90 mu M (R-2 = 0.9993), and a detection limit of 1.3 mu M (S/N = 3). Due to its high selectivity, good anti-interference ability, and long-term stability, the fabricated Au/TiO2NTs sensor provides practical detection of glucose. It is expected to be used in the construction of non-invasive PEC biosensors.

Automated summary

In this study, a gold modified TiO2 nanotube glucose photoelectrochemical sensor was prepared, which had enhanced charge separation efficiency due to its one-dimensional structure and strong surface plasmon resonance (SPR) of gold. The sensor could be activated by visible red light (625 nm). Under optimal conditions, the Au/TiO2NTs sensor showed a good sensitivity and low detection limit, making it practical for glucose detection. It is expected to be used in the construction of non-invasive PEC biosensors.