Photocharging of Carbon Nitride Thin Films for Controllable Manipulation of Droplet Force Gradient Sensors.

ABSTRACT: Intentional generation, amplification, and discharging of chemical gradients is central to many nano- and micromanipulative technologies. We describe a straightforward strategy to direct chemical gradients inside a solution via local photoelectric surface charging of organic semiconducting thin films. We observed that the irradiation of carbon nitride thin films with ultraviolet light generates local and sustained surface charges in illuminated regions, inducing chemical gradients in adjacent solutions via charge-selective immobilization of surfactants onto the substrate. We studied these gradients using droplet force gradient sensors, complex emulsions with simultaneous and independent responsive modalities to transduce information on transient gradients in temperature, chemistry, and con

SUBMITTER: Frank BD 

PROVIDER: S-EPMC10655103 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature