MOF-functionalized paper-based biosensors: Fabrications, mechanisms and applications

Point-of-care testing (POCT) biosensors are rapidly developing in recent years because of the urgent needs for rapid test and home test. Among various types of POCT biosensors, paper-based biosensors have occupied large market share owing to the advantages of cost-effectiveness, portability and simplicity. To further meet the increasing requirement of POCT in various application scenes, the functionalization of paper is highly demanded. Metal-organic framework (MOF), a multifunctional porous material, is introduced in the design of paper-based biosensors, significantly improving the sensing property and application potential. This review provides a summary of the recent advances and emerging trends of MOF-functionalized paper-based biosensors (MOF@paper), including different types of substrates, fabrication methods, detection mechanisms and applications. On account of the multifunctionality and superior performance of MOF@paper biosensors, this field should possess promising prospect in scientific researches, translational medicine and clinical applications.