@article{Yi2026, 
author = {Rongyan Yi and Shangda Chen and Lieshuang Zhong and Yiting Liu and Yingkui Zhang and Xiufeng Wang},
title = {Magnetically actuatable Janus microplate arrays for droplet rectified transport, capture, and on-demand splitting},
year = {2026},
journal = {Nano Research},
keywords = {point-of-care diagnostics, digital microfluidics, Janus wettability, droplet rectification, on-demand droplet splitting},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908920},
doi = {10.26599/NR.2026.94908920},
abstract = {Open-surface droplet manipulation is essential for digital microfluidics, point-of-care diagnostics, and programmable microreactors; however, achieving robust, programmable, and multifunctional control remains challenging due to the absence of physical confinement and intrinsic directional bias. To address this, we introduce a magnetically actuatable Janus arrayed-microplate (M-JAM) platform that synergizes structural deformation with engineered wettability asymmetry to enable deterministic droplet operations by asymmetric capillary adhesion. The platform comprises an array of parallel microplates, each with a strongly hydrophobic side opposite a weakly hydrophobic side. This asymmetric design enables three core functions: rectified droplet transport, vertical capture/release via adhesion modulation, and on-demand splitting with tunable daughter-droplet volumes dictated by a scaling law. As a functional demonstration, M-JAM orchestrates a multi-step enzymatic glucose assay using only a reciprocating magnetic field, showcasing its capability as an integrated platform for microreactions and biochemical sensing. By coupling magnetic actuation with built-in surface heterogeneity, M-JAM provides a versatile, reconfigurable system for high-precision droplet-based automation and integrated bioanalytical applications.}
}