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Rapid self-assembly of brush block copolymers to photonic crystals

Sveinbjörnsson, Benjamin R. and Weitekamp, Raymond A. and Miyake, Garret M. and Xia, Yan and Atwater, Harry A. and Grubbs, Robert H. (2012) Rapid self-assembly of brush block copolymers to photonic crystals. Proceedings of the National Academy of Sciences of the United States of America, 109 (36). pp. 14332-14336. ISSN 0027-8424. http://resolver.caltech.edu/CaltechAUTHORS:20121127-085052551

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Abstract

The reduced chain entanglement of brush polymers over their linear analogs drastically lowers the energetic barriers to reorganization. In this report, we demonstrate the rapid self-assembly of brush block copolymers to nanostructures with photonic bandgaps spanning the entire visible spectrum, from ultraviolet (UV) to near infrared (NIR). Linear relationships were observed between the peak wavelengths of reflection and polymer molecular weights. This work enables “bottom-up” fabrication of photonic crystals with application-tailored bandgaps, through synthetic control of the polymer molecular weight and the method of self-assembly. These polymers could be developed into NIR-reflective paints, to combat the “urban heat island effect” due to NIR photon thermalization.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1073/pnas.1213055109 DOIArticle
http://www.pnas.org/content/109/36/14332PublisherArticle
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3437898/PubMed CentralArticle
http://www.pnas.org/lookup/suppl/doi:10.1073/pnas.1213055109/-/DCSupplementalPublisherSupporting Information
ORCID:
AuthorORCID
Atwater, Harry A.0000-0001-9435-0201
Grubbs, Robert H.0000-0002-0057-7817
Additional Information:© 2012 National Academy of Sciences. Contributed by Robert H. Grubbs, July 30, 2012 (sent for review July 3, 2012). Published online before print August 21, 2012. This work was supported by the NSF (CHE-1048404). R.A.W. was supported in part by the DOE “Light-Material Interactions in Energy Conversion” Energy Frontier Research Center (DE-SC0001293). R.A.W. thanks the Resnick Institute for a graduate fellowship. Reflection measurements were collected at the Molecular Materials Research Center of the Beckman Institute of the California Institute of Technology. We thank Zhen-Gang Wang for helpful discussions and Bryce Sadtler for assistance with the reflection measurements. B.R.S. and R.A.W. contributed equally to this work. Author contributions: R.A.W., Y.X., and R.H.G. designed research; B.R.S., R.A.W., G.M.M., and Y.X. performed research; B.R.S. contributed new reagents/analytic tools; B.R.S., R.A.W., G.M.M., Y.X., and H.A.A. analyzed data; and B.R.S., R.A.W., G.M.M., Y.X., H.A.A., and R.H.G. wrote the paper. This article contains supporting information online at www.pnas.org/lookup/suppl/ doi:10.1073/pnas.1213055109/-/DCSupplemental. The authors declare no conflict of interest.
Group:Resnick Sustainability Institute
Funders:
Funding AgencyGrant Number
NSFCHE-1048404
Department of Energy (DOE)DE-SC0001293
Resnick Institute Graduate FellowshipUNSPECIFIED
Record Number:CaltechAUTHORS:20121127-085052551
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20121127-085052551
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35658
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:27 Nov 2012 21:20
Last Modified:08 Dec 2016 00:19

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