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Ma Y, Ferguson AL. Inverse design of self-assembling colloidal crystals with omnidirectional photonic bandgaps. SOFT MATTER 2019; 15:8808-8826. [PMID: 31603182 DOI: 10.1039/c9sm01500k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Open colloidal lattices possessing omnidirectional photonic bandgaps in the visible or near-visible regime are attractive optical materials the realization of which has remained elusive. We report the use of an inverse design strategy termed landscape engineering that rationally sculpts the free energy self-assembly landscape using evolutionary algorithms to discover anisotropic patchy colloids capable of spontaneously assembling pyrochlore and cubic diamond lattices possessing complete photonic bandgaps. We validate the designs in computer simulations to demonstrate the defect-free formation of these lattices via a two-stage hierarchical assembly mechanism. Our approach demonstrates a principled strategy for the inverse design of self-assembling colloids for the bottom-up fabrication of desired crystal lattices.
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Affiliation(s)
- Yutao Ma
- Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA.
| | - Andrew L Ferguson
- Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA.
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Mouchet SR, Lobet M, Kolaric B, Kaczmarek AM, Van Deun R, Vukusic P, Deparis O, Van Hooijdonk E. Controlled fluorescence in a beetle's photonic structure and its sensitivity to environmentally induced changes. Proc Biol Sci 2016; 283:rspb.2016.2334. [PMID: 28003460 DOI: 10.1098/rspb.2016.2334] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 11/17/2016] [Indexed: 11/12/2022] Open
Abstract
The scales covering the elytra of the male Hoplia coerulea beetle contain fluorophores embedded within a porous photonic structure. The photonic structure controls both insect colour (reflected light) and fluorescence emission. Herein, the effects of water-induced changes on the fluorescence emission from the beetle were investigated. The fluorescence emission peak wavelength was observed to blue-shift on water immersion of the elytra whereas its reflectance peak wavelength was observed to red-shift. Time-resolved fluorescence measurements, together with optical simulations, confirmed that the radiative emission is controlled by a naturally engineered photonic bandgap while the elytra are in the dry state, whereas non-radiative relaxation pathways dominate the emission response of wet elytra.
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Affiliation(s)
- Sébastien R Mouchet
- Department of Physics, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium .,School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK
| | - Michaël Lobet
- Department of Physics, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Branko Kolaric
- Department of Physics, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Anna M Kaczmarek
- L-Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Rik Van Deun
- L-Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Peter Vukusic
- School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK
| | - Olivier Deparis
- Department of Physics, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Eloise Van Hooijdonk
- Department of Physics, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
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