Love Wave Surface Acoustic Wave Sensor with Laser-Deposited Nanoporous Gold Sensitive Layer

Sensors

Cristian Viespe¹  Dana Miu¹  Gianina Popescu-Pelin¹  Valentina Dinca¹ 

[1] National Institute for Laser, Plasma and Radiation Physics, Laser Department, Atomistilor 409, 077125 Bucharest-Magurele, Romania;

关键词: saw sensor;    pulsed laser deposition;    gas sensor;    au;    nanoporous film;    love wave;   

DOI  :  10.3390/s19204492

来源: DOAJ

【 摘 要 】

Laser-deposited gold immobilization layers with different porosities were incorporated into Love Wave Surface Acoustic Wave sensors (LW-SAWs). Acetylcholinesterase (AChE) enzyme was immobilized onto three gold interfaces with different morphologies, and the sensor response to chloroform was measured. The response of the sensors to various chloroform concentrations indicates that their sensing properties (sensitivity, limit of detection) are considerably improved when the gold layers are porous, in comparison to a conventional dense gold layer. The results obtained can be used to improve properties of SAW-based biosensors by controlling the nanostructure of the gold immobilization layer, in combination with other enzymes and proteins, since the design of the present sensor is the same as that for a Love Wave biosensor.

【 授权许可】

Unknown