Motion‐Based,High‐Yielding,and Fast Separation of Different Charged Organics in Water |
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| Authors: | Mingjun Xuan Xiankun Lin Jingxin Shao Dr Luru Dai Prof Qiang He |
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| Institution: | 1. State Key Lab of Urban Water Resource and Environment, Micro/Nanotechnology Research Centre, Harbin Institute of Technology, Harbin 150080 (PR China);2. CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, National Centre for Nanoscience and Technology, Beijing 100190 (PR China) |
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| Abstract: | We report a self‐propelled Janus silica micromotor as a motion‐based analytical method for achieving fast target separation of polyelectrolyte microcapsules, enriching different charged organics with low molecular weights in water. The self‐propelled Janus silica micromotor catalytically decomposes a hydrogen peroxide fuel and moves along the direction of the catalyst face at a speed of 126.3 μm s?1. Biotin‐functionalized Janus micromotors can specifically capture and rapidly transport streptavidin‐modified polyelectrolyte multilayer capsules, which could effectively enrich and separate different charged organics in water. The interior of the polyelectrolyte multilayer microcapsules were filled with a strong charged polyelectrolyte, and thus a Donnan equilibrium is favorable between the inner solution within the capsules and the bulk solution to entrap oppositely charged organics in water. The integration of these self‐propelled Janus silica micromotors and polyelectrolyte multilayer capsules into a lab‐on‐chip device that enables the separation and analysis of charged organics could be attractive for a diverse range of applications. |
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| Keywords: | capsules dyes/pigments Janus micromotors microfluidic chip silicon |
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