Resistive pressure sensors are appealing due to having several advantages, such as simple reading mechanisms, simple construction, and quick dynamic response. Achieving a constantly changeable microstructure of sensing materials is critical for the flexible pressure sensor and remains a difficulty. Herein, a flexible, tunable resistive pressure sensors is developed via simple, low-cost microsphere self-assembly and graphene/carbon nanotubes (CNTs) solution drop coating. The sensor uses polystyrene (PS) microspheres to construct an interlocked dome microstructure with graphene/CNTs as a conductive filler. The results indicate that the interlocked microdome-type pressure sensor has better sensitivity than the single microdome-type and single planar-type without surface microstructure. The pressure sensor’s sensitivity can be adjusted by varying the diameter of PS microspheres. In addition, the resistance of the sensor is also tunable by adjusting the number of graphene/CNT conductive coating layers. The developed flexible pressure sensor effectively detected human finger bending, demonstrating tremendous potential in human motion monitoring.

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Novel gold nanospheres top-contact ZnO nanorods arrays were fabricated via combination of self-assemble nanosphere lithography and low-cost hydrothermal chemical method. Gold nanoparticles of different geometries are used to enhance the fluorescent properties of ZnO nanorods based on localized surface plasmonic resonances. The results show that defect-related emission intensity ratio of the ZnO nanorods arrays can be improved up to two orders, and the defectrelated emission peak red-shifted from 577 to 623 nm. This improvement is attributed to the enhanced localized surface plasmonic absorption of gold nanoparticles, which implies a promising application in surface plasmonic enhanced spectra.