Biomimetic Mechanoswitchable Interfaces for High-Performance Spatial Gas Bubble Maneuvering

Abstract

The on-demand manipulation of gas bubbles in aqueous ambient environments is fundamental to many fields such as microfluidics and biochemical microanalysis. However, most bubble manipulation strategies are limited to restricted locomotion on the confined surfaces without spatial convenience of transport. Herein, we report a kind of biomimetic bubble manipulator with mechanoswitchable interfaces (MSIs), featuring the advantages of parallel bubble control and spatial maneuvering flexibility. By the synergic action between Janus aluminum membrane and superaerophilic microfiber array, the gas–MSI interfacial adhesion can be reversibly switched to achieve capturing/releasing underwater bubbles. Moreover, the adhesion force of MSI can be readily tuned by diverse experimental parameters including surface roughness, fiber number, diameter, and spacing of the neighboring microfibers, which are further systematically investigated. Relying on this mobile platform, we demonstrate a series of powerful applications including bubble parallel control, bubble array regrouping, arbitrary bubble transport and even manipulating underwater solids through bubbles, which are otherwise challenging for conventional approaches. We envision that this versatile platform will bring new insights into potential applications, such as cross-species sample control and handheld gas microsyringe.

Engineering Nanoplatforms for Theranostics of Atherosclerotic Plaques

“…[ 45–50 ] Utilizing nanoplatforms‐based molecular imaging allows for precise risk stratification of plaques and enhances the specific detection of atherosclerotic plaques. [ 51–53 ] Various nanomaterials‐based imaging modalities have significantly improved the diagnostic accuracy of atherosclerotic plaques by visualizing and detecting plaques. [ 54–57 ] This review summarizes the applications of nanoplatforms for imaging atherosclerotic plaques, including X‐ray computed tomography (CT) imaging, magnetic resonance (MR) imaging, positron emission tomography (PET) imaging, fluorescence (FL) imaging, ultrasound (US) imaging, photoacoustic (PA) imaging, and multimodal imaging.…”