eprintid: 17379
rev_number: 19
userid: 1419
dir: disk0/00/01/73/79
datestamp: 2013-02-27 18:46:45
lastmod: 2019-02-02 16:55:09
status_changed: 2013-02-27 18:46:45
type: article
metadata_visibility: show
item_issues_count: 0
eprint_status: archive
creators_name: Kamenjicki, M
creators_name: Lednev, IK
creators_name: Mikhonin, A
creators_name: Kesavamoorthy, R
creators_name: Asher, SA
creators_email: 
creators_email: 
creators_email: 
creators_email: 
creators_email: asher@pitt.edu
creators_id: 
creators_id: 
creators_id: 
creators_id: 
creators_id: ASHER
title: Photochemically Controlled Photonic Crystals
ispublished: pub
divisions: sch_as_chemistry
full_text_status: public
abstract: We have developed photochemically controlled photonic crystals that may be useful in novel recordable and erasable memories and/or display devices. These materials can operate in the UV, visible, or near-IR spectral regions. Information is recorded and erased by exciting the photonic crystal with ∼360 nm UV light or ∼480 nm visible light. The information recorded is read out by measuring the photonic crystal diffraction wavelength. The active element of the device is an azobenzene-functionalized hydrogel, which contains an embedded crystalline colloidal array. UV excitation forms cis-azobenzene while visible excitation forms trans-azobenzene. The more favorable free energy of mixing of cis-azobenzene causes the hydrogel to swell and to red-shift the photonic crystal diffraction. We also observe fast nanosecond, microsecond, and millisecond transient dynamics associated with fast heating lattice constant changes, refractive index changes, and thermal relaxations.
date: 2003-10-01
date_type: published
publication: Advanced Functional Materials
volume: 13
number: 10
pagerange: 774 - 780
refereed: TRUE
issn: 1616-301X
id_number: 10.1002/adfm.200304424
citation:   Kamenjicki, M and Lednev, IK and Mikhonin, A and Kesavamoorthy, R and Asher, SA  (2003) Photochemically Controlled Photonic Crystals.  Advanced Functional Materials, 13 (10).  774 - 780.  ISSN 1616-301X     
document_url: http://d-scholarship-dev.library.pitt.edu/17379/1/licence.txt