Affordable Access

deepdyve-link
Publisher Website

Programmable Wrinkling of Self-Assembled Nanoparticle Films on Shape Memory Polymers.

Authors
  • Gabardo, Christine M1
  • Yang, Jie1
  • Smith, Nathaniel J2
  • Adams-McGavin, Robert C2
  • Soleymani, Leyla1, 2
  • 1 School of Biomedical Engineering, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada. , (Canada)
  • 2 Department of Engineering Physics, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada. , (Canada)
Type
Published Article
Journal
ACS Nano
Publisher
American Chemical Society
Publication Date
Sep 27, 2016
Volume
10
Issue
9
Pages
8829–8836
Identifiers
DOI: 10.1021/acsnano.6b04584
PMID: 27608141
Source
Medline
Keywords
License
Unknown

Abstract

Hierarchically structured materials, inspired by sophisticated structures found in nature, are finding increasing applications in a variety of fields. Here, we describe the fabrication of wrinkled gold nanoparticle films, which leverage the structural tunability of gold nanoparticles to program the wavelength and amplitude of gold wrinkles. We have carefully examined the structural evolution and tuning of these wrinkled surfaces through varying nanoparticle parameters (diameter, number of layers, density) and substrate parameters (number of axes constrained during wrinkling) through scanning electron microscopy and cross-sectional transmission electron microscopy. It is found that nanoparticle layers of sufficient density are required to obtain periodical wrinkled structures. It was also found that tuning the nanoparticle diameter and number of layers can be used to program the wrinkle wavelength and amplitude by changing the film thickness and mechanical properties. This dual degree of tunability, not previously seen with continuous films, allows us to develop one of the smallest wrinkles developed to date with tunability in the sub-100 nm regime. The effect of the induced structural tunability on the enhancement of the intensity of the 4-mercaptopyridine Raman spectra is also studied through the application of these devices as substrates for surface-enhanced Raman spectroscopy (SERS), where wrinkling proves to be an effective method for enhancing the SERS signal in cases where there is an inherently low density of gold nanoparticles.

Report this publication

Statistics

Seen <100 times