Journal
SENSORS
Volume 19, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/s19204492
Keywords
SAW sensor; pulsed laser deposition; gas sensor; Au; nanoporous film; Love Wave
Funding
- Romanian Ministry of Research and Innovation, CCCDI-UEFISCDI [PN-III-P1-1.2-PCCDI-2017-0172/15PCCDI, NUCLEU 16N/08.02.2019]
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Laser-deposited gold immobilization layers with different porosities were incorporated into LoveWave Surface AcousticWave 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.
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