Saure, LM and Kohlmann, N and Qiu, H and Shetty, S and Nia, AS and Ravishankar, N and Feng, X and Szameit, A and Kienle, L and Adelung, R and Schütt, F (2023) Hybrid Aeromaterials for Enhanced and Rapid Volumetric Photothermal Response. In: ACS Nano, 17 (22). pp. 22444-22455.
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Abstract
Conversion of light into heat is essential for a broad range of technologies such as solar thermal heating, catalysis and desalination. Three-dimensional (3D) carbon nanomaterial-based aerogels have been shown to hold great promise as photothermal transducer materials. However, until now, their light-to-heat conversion is limited by near-surface absorption, resulting in a strong heat localization only at the illuminated surface region, while most of the aerogel volume remains unused. We present a fabrication concept for highly porous (>99.9) photothermal hybrid aeromaterials, which enable an ultrarapid and volumetric photothermal response with an enhancement by a factor of around 2.5 compared to the pristine variant. The hybrid aeromaterial is based on strongly light-scattering framework structures composed of interconnected hollow silicon dioxide (SiO2) microtubes, which are functionalized with extremely low amounts (in order of a few μg cm�3) of reduced graphene oxide (rGO) nanosheets, acting as photothermal agents. Tailoring the density of rGO within the framework structure enables us to control both light scattering and light absorption and thus the volumetric photothermal response. We further show that by rapid and repeatable gas activation, these transducer materials expand the field of photothermal applications, like untethered light-powered and light-controlled microfluidic pumps and soft pneumatic actuators (Figure Presented). © 2023 The Authors. Published by American Chemical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | ACS Nano |
| Publisher: | American Chemical Society |
| Additional Information: | The copyright for this article belongs to authors. |
| Keywords: | Aerogels; Desalination; Light absorption; Light scattering; Microfluidics; Silica; Silicon oxides; Transducers, 2D nanomaterial; Aeromaterial; Framework structures; Photo-thermal; Photothermal effects; Photothermal response; Reduced graphene oxides; Soft robotics; Transducer material; Volumetrics, Graphene, aerogel; carbon; graphene; graphene oxide; nanomaterial; nanosheet; silicon dioxide, absorption; article; catalysis; controlled study; desalination; heating; hybrid; light absorption; light scattering; microfluidics; micropump; nonhuman; pharmaceutics; robotics |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 29 Nov 2024 11:05 |
| Last Modified: | 29 Nov 2024 11:05 |
| URI: | http://eprints.iisc.ac.in/id/eprint/85364 |
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