RETRACTED: Preparation and Analysis of Structured Color Janus Droplets Based on Microfluidic 3D Droplet Printing

Abstract

The microfluidic technique for the three-dimensional (3D) printing of Janus droplets offers precise control over their size, orientation, and positioning. The proposed approach investigates the impact of variables such as the volume ratio of the oil phase, droplet size, and the ratio of nonionic surfactants on the dimensions of the structured color apertures of Janus droplets. The findings reveal that structured color apertures modulate accurately. Furthermore, fabricating color patterns facilitates cat, fish, and various other specific shapes using structured color Janus droplets. The color patterns exhibit temperature-sensitive properties, enabling them to transition between display and concealed states. Herein, the adopted microfluidic technique creates Janus droplets with customizable characteristics and uniform size, solving orientation as well as space arrangement problems. This approach holds promising applications for optical devices, sensors, and biomimetic systems.

Review of Droplet Printing Technologies for Flexible Electronic Devices: Materials, Control, and Applications

“… Composite droplets have exhibited various unexpected performances to promote the application potentials through the interaction effect among different nanomaterials [ 99 , 100 ]. Among them, droplet printing technologies have shown excellent advantages to prepare composite droplets with different liquid channels [ 101 ]. However, due to different solution properties like surface tension and conductivity of printing jets in micro/nano scale, the accurate and stable assemble of composite droplets with various dimensions and materials is still a serious challenge requiring concerns.…”