Bohn, JJ and Ben-Moshe, M and Tikhonov, A and Qu, D and Lamont, DN and Asher, SA
(2010)
Charge stabilized crystalline colloidal arrays as templates for fabrication of non-close-packed inverted photonic crystals.
Journal of Colloid and Interface Science, 344 (2).
298 - 307.
ISSN 0021-9797
|
Plain Text (licence)
Available under License : See the attached license file.
Download (1kB)
|
Abstract
We developed a straightforward method to form non-close-packed highly ordered fcc direct and inverse opal silica photonic crystals. We utilize an electrostatically self assembled crystalline colloidal array (CCA) template formed by monodisperse, highly charged polystyrene particles. We then polymerize a hydrogel around the CCA (PCCA) and condense silica to form a highly ordered silica impregnated (siPCCA) photonic crystal. Heating at 450 °C removes the organic polymer leaving a silica inverse opal structure. By altering the colloidal particle concentration we independently control the particle spacing and the wall thickness of the inverse opal photonic crystals. This allows us to control the optical dielectric constant modulation in order to optimize the diffraction; the dielectric constant modulation is controlled independently of the photonic crystal periodicity. These fcc photonic crystals are better ordered than typical close-packed photonic crystals because their self assembly utilizes soft electrostatic repulsive potentials. We show that colloidal particle size and charge polydispersity has modest impact on ordering, in contrast to that for close-packed crystals. © 2010 Elsevier Inc. All rights reserved.
Share
Citation/Export: |
|
Social Networking: |
|
Details
Item Type: |
Article
|
Status: |
Published |
Creators/Authors: |
Creators | Email | Pitt Username | ORCID |
---|
Bohn, JJ | | | | Ben-Moshe, M | | | | Tikhonov, A | | | | Qu, D | | | | Lamont, DN | | | | Asher, SA | asher@pitt.edu | ASHER | |
|
Date: |
15 April 2010 |
Date Type: |
Publication |
Journal or Publication Title: |
Journal of Colloid and Interface Science |
Volume: |
344 |
Number: |
2 |
Page Range: |
298 - 307 |
DOI or Unique Handle: |
10.1016/j.jcis.2010.01.021 |
Schools and Programs: |
Dietrich School of Arts and Sciences > Chemistry |
Refereed: |
Yes |
ISSN: |
0021-9797 |
MeSH Headings: |
Colloids--chemistry; Crystallization; Particle Size; Polystyrenes--chemistry; Refractometry--methods; Silicon Dioxide--chemistry; Surface Properties |
Other ID: |
NLM NIHMS181368, NLM PMC2882866 |
PubMed Central ID: |
PMC2882866 |
PubMed ID: |
20163800 |
Date Deposited: |
08 Feb 2013 21:01 |
Last Modified: |
02 Feb 2019 16:55 |
URI: |
http://d-scholarship-dev.library.pitt.edu/id/eprint/17242 |
Metrics
Monthly Views for the past 3 years
Plum Analytics
Altmetric.com
Actions (login required)
|
View Item |