(510g) Light-Directed Manipulation and Assembly of Colloids on Solid Substrates
AIChE Annual Meeting
2023
2023 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Directed and Self Assembly of Colloids
Thursday, November 9, 2023 - 5:00pm to 5:15pm
In this talk, we will present our contributions to the optical manipulation and assembly of architectural materials and structures on solid substrates. We innovate an optothermally-gated photon nudging (OPN) technique as a non-invasive and contactless strategy to achieve versatile nanomanipulation of colloidal particles on a solid substrate through interfacial engineering [1]. This technique takes advantage of a thin surfactant layer to optothermally modulate the particle-substrate interaction, which enables the manipulation of colloidal particles on solid substrates with optical scattering force. Through geometry control, light-directed actuation of colloids on solid substrates can provide additional possibility for on-chip devices [2]. Operated on the solid surfaces without liquid media, OPN can avoid the undesired Brownian motion of nanoparticles in solutions to manipulate individual particles with high accuracy. In addition, the assembled structures can be actively reassembled into new configurations for the fabrication of tunable functional devices [3].
Key references:
[1] J. Li et al. Optical Nanomanipulation on Solid Substrates Via Optothermally-Gated Photon Nudging. Nat. Commun. 2019, 10, 5672.
[2] J. Li et al. Opto-Thermocapillary Nanomotors on Solid Substrates. ACS Nano 2022, 16, 8820-8826.
[3] J. Li et al. Tunable Chiral Optics in All-Solid-Phase Reconfigurable Dielectric Nanostructures. Nano Lett. 2021, 21, 973-979.