Cantilever-Based Sensor Utilizing a Diffractive Optical Element with High Sensitivity to Relative Humidity.

ABSTRACT: High-sensitivity and simple, low-cost readout are desirable features for sensors independent of the application area. Micro-cantilever sensors use the deflection induced by the analyte presence to achieve high-sensitivity but possess complex electronic readouts. Current holographic sensors probe the analyte presence by measuring changes in their optical properties, have a simpler low-cost readout, but their sensitivity can be further improved. Here, the two working principles were combined to obtain a new hybrid sensor with enhanced sensitivity. The diffractive element, a holographically patterned thin photopolymer layer, was placed on a polymer (polydimethylsiloxane) layer forming a bi-layer macro-cantilever. The different responses of the layers to analyte presence lead to cantilever def

SUBMITTER: Grogan C 

PROVIDER: S-EPMC7957689 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature