Surface acoustic wave sensor for c-reactive protein detection

Ming Jer Jeng, Mukta Sharma, Ying Chang Li, Yi Chen Lu, Chia Yu Yu, Chia Lung Tsai*, Shiang Fu Huang, Liann Be Chang, Chao Sung Lai

*Corresponding author for this work

Research output: Contribution to journalJournal Letter peer-review

23 Scopus citations

Abstract

A surface acoustic wave (SAW) sensor was investigated for its application in C-reactive protein (CRP) detection. Piezoelectric lithium niobate (LiNbO3) substrates were used to study their frequency response characteristics in a SAW sensor with a CRP sensing area. After the fabrication of the SAW sensor, the immobilization process was performed for CRP/anti-CRP interaction. The CRP/anti-CRP interaction can be detected as mass variations in the sensing area. These mass variations may produce changes in the amplitude of sensor response. It was clearly observed that a CRP concentration of 0.1 µg/mL can be detected in the proposed SAW sensor. A good fitting linear relationship between the detected insertion loss (amplitude) and the concentrations of CRP from 0.1 µg/mL to 1 mg/mL was obtained. The detected shifts in the amplitude of insertion loss in SAW sensors for different CRP concentrations may be useful in the diagnosis of risk of cardiovascular diseases.

Original languageEnglish
Article number6640
Pages (from-to)1-11
Number of pages11
JournalSensors
Volume20
Issue number22
DOIs
StatePublished - 02 11 2020

Bibliographical note

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • C-reactive protein
  • Piezoelectric lithium niobate
  • Surface acoustic wave

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