Abstract
With incorporation of gold nanoparticles, i.e., nanorods (AuNR) and nanospheres (AuNS), into a polyurethane-based shape-memory polymer (SMP) EG-72D matrix, SMP nanocomposite films capable of being remotely triggered by low-power laser are fabricated and characterized using UV-vis-NIR spectroscopy, X-ray scattering, and dynamic mechanical analysis (DMA). It is demonstrated that, with incorporation of very low concentration of gold nanorods (≈0.1 wt%), the mechanically programmed EG-72D/AuNR nanocomposite presents rapid response to low power laser irradiation (785 nm, ≈10 mW). Comparative studies on the laser irradiation response of EG-72D/AuNS and EG-72D/AuNR nanocomposite films suggest that AuNRs have significantly higher photothermal conversion efficiency than AuNS and on-resonance laser irradiation, matching the wavelength of the incident laser with the longitudinal plasmon resonance of AuNR, is necessary to induce the fast response of gold nanoparticle enabled SMP nanocomposites.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 338-345 |
| Number of pages | 8 |
| Journal | Particle and Particle Systems Characterization |
| Volume | 30 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2013 |
| Externally published | Yes |
Keywords
- gold nanoparticles
- laser activation
- nanocomposites
- shape-memory polymers
- structure-property relationships
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics