“…In the past two decades, metal-organic frameworks (MOFs), with high porosity and specic area, adjustable structure and function, and good biocompatibility, have been widely regarded as promising alternatives for application in gas storage, 8,9 catalysis, 10,11 chemical sensing 12,13 and delivery, 14,15 and have attracted wide attention in sample pretreatment. 16,17 However, the size of most MOF particles is too small to collect.…”