Reconfigurable Grating Diffraction Structural Color in Self-Assembled Colloidal Crystals
- Univ. of Michigan, Ann Arbor, MI (United States); OSTI
- Univ. of Michigan, Ann Arbor, MI (United States)
Self-assembled colloidal crystals display structural colors due to light diffracted from their microscale, ordered structure. This color arises due to Bragg reflection (BR) or grating diffraction (GD); the latter mechanism is much less explored than the former. Here the design space for generating GD structural color is identified and its relative advantages are demonstrated. Electrophoretic deposition is used to self-assemble crystals with fine crystal grains from colloids of diameter 1.0 µm. The structural color in transmission is tunable across the full visible spectrum. The optimum optical response—represented by both color intensity and saturation—is observed at low layer number (≤5 layers). The spectral response is well predicted by Mie scattering of the crystals. Taken together, the experimental and theoretical results demonstrate that vivid grating colors with high color saturation can be produced from thin layers of micron-sized colloids. These colloidal crystals extend the potential of artificial structural color materials.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0013562
- OSTI ID:
- 2420296
- Journal Information:
- Small, Journal Name: Small Journal Issue: 37 Vol. 19; ISSN 1613-6810
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Anisotropy effects on the kinetics of colloidal crystallization and melting: comparison of spheres and ellipsoids
Journal Article
·
Tue Sep 03 20:00:00 EDT 2019
· Soft Matter
·
OSTI ID:1802508