Year: 2024
Type: article
Abstract: Optical fiber hydrogen (H2) sensors have garnered attention for avoiding explosion hazards in flammable gas environments. Conventional optical fiber sensors rely on electron beam sputtering and chemical coating for functionalization, but these methods may not achieve precise functionalization of intricate structures. Based on 4D printing principles, an H2‐sensitive ink containing methacrylate groups modified palladium (Pd) nanoparticles (NPs) is reported, with a printing resolution of 200 nm. Then, a fiber‐tip clamped‐beam H2 sensor is fabricated with the femtosecond (Fs) laser‐induced two‐photon polymerization (TPP) technique. The sensor exhibits compact dimensions and fast responses, only 2.64 s for a 4.0 vol.% H2 concentration. A high sensitivity of roughly 165 pm %−1 is achieved as the H2 concentration increases from 0% to 5.5 vol.%. This study demonstrates that H2‐sensitive microstructures can be flexibly achieved by TPP of H2‐sensitive inks, offering a solution for achieving on‐chip direct laser writing of integrated H2 microsensors.
Source: Laser & Photonics Review
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405334947