Shape matters: A gold nanoparticle enabled shape memory polymer triggered by laser irradiation

Zhiwei Xiao, Qiang Wu, Sida Luo, Chuck Zhang, Jeffery Baur, Ryan Justice, Tao Liu

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)338-345
Number of pages8
JournalParticle and Particle Systems Characterization
Volume30
Issue number4
DOIs
StatePublished - Apr 2013
Externally publishedYes

Keywords

  • gold nanoparticles
  • laser activation
  • nanocomposites
  • shape-memory polymers
  • structure-property relationships

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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