Sequential Actuation of Shape-Memory Polymers through Wavelength-Selective Photothermal Heating of Gold Nanospheres and Nanorods
Abstract
Photothermal triggering of shape-memory polymers is an appealing noncontact mode of actuation for responsive materials and soft robotics. Wavelength-selective photothermal triggering of shape recovery is reported in thermoplastic polyurethane shape-memory polymers with embedded gold (Au) nanospheres and nanorods. Light-emitting diodes with wavelengths of 530 and 860 nm matched to the surface plasmon resonances drive selective shape recovery. Wavelength-selective shape recovery enables sequential actuation, as demonstrated in a wavelength-controlled stage with optically controlled height and tilt angle using legs of shape-memory-polymer films with embedded Au nanospheres and nanorods.
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Polymer chain cross-linking hinders chain packing, leading to an increase in free volume in the system.
“Other researchers reported that the polymer chain cross-linking hinders chain packing, consequently leading to an increase in the free volume in the system.45”
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- Authors
- Mishra, S. R., & Tracy, J. B.
- Affiliations
- North Carolina State University (US)
- Corresponding author
- Tracy, Joseph B.
- Venue
- ACS Applied Nano Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-06-15
- Volume
- 1
- Issue
- 7
- Pages
- 3063-3067
- ISSN
- 2574-0970 (ISSN-L)
- OpenAlex
- W2808148903
- Cited by
- 68
- References
- 45
- Citations by year
- 2026: 5 · 2025: 10 · 2024: 13 · 2023: 6 · 2022: 4 · 2021: 7 · 2020: 13 · 2019: 8 · 2018: 2
- FWCI
- 4.79
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Nano Materials (publishedVersion)
- Funders
- Division of Materials Research (1121107, 1056653)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Biomedical Engineering › Dielectric materials and actuators
- Keywords
- shape memory polymers, photothermal actuation, gold nanospheres, gold nanorods, surface plasmon resonance, thermoplastic polyurethane, soft robotics, shape recovery
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