当前位置: X-MOL 学术J. Am. Chem. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Photocharging of Carbon Nitride Thin Films for Controllable Manipulation of Droplet Force Gradient Sensors
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2023-11-07 , DOI: 10.1021/jacs.3c09084
Bradley D Frank 1 , Markus Antonietti 1 , Paolo Giusto 1 , Lukas Zeininger 1
Affiliation  

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 concentration via tilting, morphological reconfiguration, and chemotaxis. Fine control over the interaction between local, photoelectrically patterned, semiconducting carbon nitride thin films and their environment yields a new method to design chemomechanically responsive materials, potentially applicable to micromanipulative technologies including microfluidics, lab-on-a-chip devices, soft robotics, biochemical assays, and the sorting of colloids and cells.

中文翻译:

氮化碳薄膜光充电用于液滴力梯度传感器的可控操作

化学梯度的有意生成、放大和释放是许多纳米和显微操作技术的核心。我们描述了一种简单的策略,通过有机半导体薄膜的局部光电表面充电来引导溶液内的化学梯度。我们观察到,用紫外线照射氮化碳薄膜会在照射区域产生局部且持续的表面电荷,通过表面活性剂在基材上的电荷选择性固定来诱导相邻溶液中的化学梯度。我们使用液滴力梯度传感器、具有同时和独立响应模式的复杂乳液来研究这些梯度,通过倾斜、形态重构和趋化性来转换温度、化学和浓度的瞬态梯度信息。对局部光电图案半导体氮化碳薄膜与其环境之间相互作用的精细控制,产生了一种设计化学机械响应材料的新方法,可能适用于微操作技术,包括微流体、芯片实验室设备、软机器人、生物化学测定以及胶体和细胞的分选。
更新日期:2023-11-07
down
wechat
bug