Spectral-selective near-infrared photothermal detector enabled by integrating graphene-Au nanorods hybrid on a thermistor
Abstract
Near-infrared (NIR) detectors with high sensitivity and spectral selectivity are highly desired in various applications. In this work, a photothermal detector with high NIR sensitivity and spectral selectivity was developed by simply modifying a photothermal layer of reduced graphene oxide-Au nanorods (rGO-AuNRs) hybrid on a thermistor, which can convert the light energy into heat and reflect as resistance changes of a thermistor. Owing to the plasmon coupling of the two materials, the obtained rGO-AuNRs hybrid not only has remarkable photothermal conversion efficiency but also exhibits dependence on spectral response. Thus, benefiting from the excellent performance of the hybrid, the fabricated detector is sensitive to illumination in the wavelength range from 700 to 1000 nm with the highest photoresponsivity of 2.50 × 105 Ω·W−1. The photothermal detector presented in this work will provide a simple and inexpensive alternative for NIR detector development.
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The longitudinal localized surface plasmon resonance peak of AuNRs redshifts with increasing aspect ratio.
“The UV -Vis absorption spectra and SEM images of the AuNRs are shown in Figure 1D, indicating that the longitudinal localized surface plasmon resonance peak redshifts with the increasing AR of the nanorods. [29]”
From Multiplex Cellular Microenvironment Detection Based on Surface-Enhanced Raman Scattering Patch (2025) · cites this paper as [29]
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References 42 · Cited by 6
- Authors
- Yang, K., Kang, S., Wu, X., Liu, B., Sun, C., & Wang, Y.
- Affiliations
- State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instruments and Opto-electronics Engineering, Tianjin University , Tianjin 300072, China
- Tianjin University (CN)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2023-10-02
- Volume
- 123
- Issue
- 14
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W4387342328
- Cited by
- 6
- References
- 42
- Citations by year
- 2025: 2 · 2024: 4
- FWCI
- 0.70
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Funders
- National Natural Science Foundation of China (61971302)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Thermal Radiation and Cooling Technologies
- Physical Sciences › Engineering › Biomedical Engineering › Plasmonic and Surface Plasmon Research
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Gold and Silver Nanoparticles Synthesis and Applications
- Keywords
- spectral selectivity, reduced graphene oxide, gold nanorods, thermistor, plasmon coupling, photothermal conversion, photoresponsivity
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