Self-Assembled Multilayer-Based Electrode Passivation for Durable and Consistent Electrolyte-Gated IGO Transistor Biosensors
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초록
내용
To maintain the operational stability of transistor-based biosensors in aqueous electrolytes, efficient electrode passivation is essential. We suggest an extremely efficient passivation method using a solution-processed self-assembled multilayer (SAML) for electrolyte-gated transistor (EGT) biosensors. The SAML structure, composed of layers of 1,10-decanedithiol, vinyl-polyhedral oligomeric silsesquioxane, and 1-octadecanethiol, ensures the dependable operation of EGTs in phosphate-buffered saline (PBS) without short-circuiting over numerous repetitions. The SAML-passivated EGT biosensor is constructed with a solution-processed IGO thin film as an amorphous oxide semiconductor functioning both as a semiconducting channel in the transistor and as a functionalizable biological interface for a bioreceptor. This emphasizes the effectiveness of the SAML passivation technique in achieving stable and reproducible biosensors.