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Semion K Saikin

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Articles

Structural properties, polymorphism, and multiscale disorder unravel energy transport limitations in perylene diimide semiconductors

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By Marco Mendoza Aviña, Kenneth Madsen, Dongbin Shin, Christopher J. H. Smalley, Colan E. Hughes, Tom Willhammar, Raj Pandya, Semion K Saikin, Duncan Johnstone Verified, Jeffrey Gorman, Jooyoung Sung, Gianni Jacucci, Paul Midgley, Demie M. Kepaptsoglou, Quentin M. Ramasse, Akshay Rao, Kenneth Harris, Sean Collins
| Science Magazine Verified
Abstract INTRODUCTION RESULTS DISCUSSION MATERIALS AND METHODS Acknowledgments Supplementary Materials REFERENCES Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Organic semiconductors continue to make substantial performance gains from photovoltaics to electronics. However, understanding how differences in solid-state structure give rise to large differences in energy transport properties remains unresolved.
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By Daniel Hinton, James Ng, Jian Sun, Stephen Lee, Semion K Saikin, Jenna L. Logsdon, David White, Andrew C. Cavell, Michael R Wasielewski, Alan Aspuru-Guzik, Angela N. Marquard, Veronica K. Krasecki, Kassandra A. Knapper, Katherine M. Lupo
| American Chemical Society
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Effect of secondary relaxation transitions on photo-induced anisotropy in glassy azobenzene-functionalized polymers

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By Sergey S. Kharinsev, Ksenia Shukhina, Alexander Fishman, Semion K Saikin
| Royal Society of Chemistry Verified
We propose a physical mechanism for a photo-induced orientation alignment of azo-dyes incorporated in polymers at temperatures far below the glass transition temperature. Using polarized FT-IR spectroscopy, we show that optical dichroism undergoes an observable change at the ?-relaxation transition of azo-polymer when the mobility of short backbone fragments is increased. We explain this effect using temperature-dependent local strains that occur within the polymer backbones in a glassy state.
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