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Published on: April 4, 2017
Laser-Induced Nanocarbon Films Enable Optical Sensor Based on Combined Photothermal and Piezoresistive Effect
Yanbo Yao1, Jingwen Yao2, Tao Liu2
1School of Materials and Packaging Engineering, Fujian Polytechnic Normal University, Fuqing 350300, China.
Polymers
|June 26, 2026
Summary
This study enhances a photomechanical optical sensor using interface engineering for improved performance. The novel design boosts responsivity and durability, advancing bio-inspired detectors for practical applications.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Bio-inspired uncooled infrared detectors offer potential for advanced sensing.
- Existing photomechanical sensors face limitations in performance and stability.
Purpose of the Study:
- To enhance a photomechanical optical sensor through interface engineering.
- To improve responsivity and stability of bio-inspired optical detectors.
Main Methods:
- Strengthening the interfacial bond between photothermal polydopamine nanoparticle (PDA NP)/polydimethylsiloxane (PDMS) composite and a nanocarbon film.
- Utilizing a flexible PDMS substrate for thermal insulation and mechanical stability.
- Characterizing sensor performance including responsivity and wavelength dependence.
Main Results:
- Achieved a responsivity of 51.6 W⁻¹ at 808 nm, an order-of-magnitude improvement.
- Demonstrated wavelength-dependent responsivity from 93.1 W⁻¹ at 455 nm to 14.4 W⁻¹ at 1550 nm.
- Confirmed stable detection and robust durability for optical sensing applications.
Conclusions:
- Interface engineering is a viable strategy for high-performance uncooled optical detection.
- Polydopamine nanoparticles (PDA NPs) are effective photothermal converters, especially at shorter wavelengths.
- The sensor's wavelength-dependent response allows for future spectral sensitivity tailoring.
