Journal
MATERIALS TODAY
Volume 25, Issue -, Pages 10-20Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mattod.2019.02.015
Keywords
Opto-thermoelectric tweezers; Optical chirality; Metamolecules; Bottom-up assembly
Categories
Funding
- National Science Foundation [NSF-CMMI-1761743]
- Army Research Office [W911NF-17-1-0561]
- National Aeronautics and Space Administration Early Career Faculty Award [80NSSC17K0520]
- National Institute of General Medical Sciences of the National Institutes of Health [DP2GM128446]
- Robert A. Welch Foundation [F-1464]
- National Science Foundation through the Center for Dynamics and Control of Materials: an NSF MRSEC [DMR-1720595]
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Chirality is a ubiquitous phenomenon in the natural world. Many biomolecules without inversion symmetry, such as amino acids and sugars, are chiral molecules. Measuring and controlling molecular chirality at a high precision down to the atomic scale that are highly desired in physics, chemistry, biology, and medicine, however, have remained challenging. Herein, we achieve all-optical reconfigurable chiral meta-molecules experimentally using metallic and dielectric colloidal particles as artificial atoms or building blocks to serve at least two purposes. One is that the on-demand meta-molecules with strongly enhanced optical chirality are well-suited as substrates for surface-enhanced chiroptical spectroscopy of chiral molecules and as active components in optofluidic and nanophotonic devices. The other is that the bottom-up-assembled colloidal meta-molecules provide microscopic models to better understand the origin of chirality in the actual atomic and molecular systems.
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