Few-layer Ti3C2Tx MXene: A promising surface plasmon resonance biosensing material to enhance the sensitivity

By Leiming Wu, Qi You, Youxian Shan, Shuaiwen Gan, Yuting Zhao, X. Dai, Y. Xiang. Sensors and actuators. B, Chemical, 2018

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Abstract In this contribution, a novel surface plasmon resonance (SPR) biosensor with few-layer Ti3C2Tx MXene to enhance the sensitivity is proposed. Few-layer Ti3C2Tx MXene is coated on the surface of metals thin film to act as a protective layer and further to improve the sensitivity. The results show that the sensitivity enhancements at λ = 633 nm are 16.8%, 28.4%, 46.3% and 33.6% for the proposed SPR biosensors based on Au with 4 layers Ti3C2Tx, Ag with 7 layers Ti3C2Tx, Al with 12 layers Ti3C2Tx and Cu with 9 layers Ti3C2Tx, respectively. Moreover, we have discussed the sensitivity of the proposed Au-based SPR biosensor with monolayer Ti3C2Tx MXene works at λ = 532 nm, the result shows that the sensitivity can reach 224.5°/RIU. Our contributions reveal potential applications of few-layer Ti3C2Tx MXene as a new type of biosensing material, and it is therefore anticipated that Ti3C2Tx MXene and other 2D MXene nanomaterials could find promising applications in SPR biosensors.

Subfields: Materials Chemistry, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/299a3e9f590546dd18a871234ab98ee474749cdd