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Supramolecular Self-assembly of Chlorins in an Aerosolized Droplet to Synthesize Biomimetic Antennas

Published online by Cambridge University Press:  07 October 2013

Vivek B. Shah  and
Pratim Biswas
Vivek B. Shah
Affiliation:
Aerosol and Air Quality Research Laboratory, Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
Pratim Biswas
Affiliation:
Aerosol and Air Quality Research Laboratory, Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
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Abstract

Natural light harvesting organisms have evolved to harvest sunlight efficiently. Green sulfur bacteria, which contain chlorosomes, can survive in extremely low light conditions mainly because of efficient light absorption and transfer of energy, facilitated by the assembled dye molecules. Due to these reasons, chlorosomes have been used in dye sensitized solar cells to improve the light absorption and performance. The chlorosome absorption spectrum is fixed and their size is dependent on the organism. Various solution-based techniques have been developed for synthesizing mimics by supramolecular self-assembly. However, controlling the size of agglomerates and their subsequent deposition on surfaces to fabricate a device is difficult. In this work, a one-step aerosol-based self-assembly technique has been developed for the first time, to assemble and deposit chlorin (Bacteria chlorophyll mimics) agglomerates. A shift in absorption spectra of 79 nm which is comparable to the natural system was obtained. The analysis shows that kinetics of nucleation play an important role in assembly.

Keywords

self-assemblyspray depositionbiomimetic (assembly)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1539: Symposium D – From Molecules to Materials—Pathways to Artificial Photosynthesis , 2013 , mrss13-1539-d05-01
Copyright
Copyright © Materials Research Society 2013 

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