Abstract: Provided are a fluorescence imaging probe and a handheld imaging prober, relating to the technical field of medical devices. The fluorescence imaging probe includes a dichroic filter and an image detector, the dichroic filter is arranged at an included angle of 45° with a direction of a main optical axis of incident excitation light, the incident excitation light is reflected by the dichroic filter to a target detection position, the reflected incident excitation light excites a fluorescent substance at the target detection position to form fluorescence, a main optical axis of the fluorescence is arranged coaxially with the image detector, the fluorescence is incident to the image detectors through the dichroic filter, and the image detector converts the received fluorescence into an image signal.

Abstract: A surface-modified composite zinc-based negative electrode, a preparation method thereof, and a battery are provided. The composite zinc-based negative electrode includes a zinc matrix material, a nano inorganic metal/alloy modified layer, and an organic polymer protective layer. The nano inorganic metal/alloy modified layer can increase hydrogen evolution overpotential of the composite zinc-based negative electrode, inhibit the generation of hydrogen on the negative electrode surface and occurrence of side reactions. The organic polymer protective layer can enhance the zinc ion concentration and deposition uniformity at the electrode interface, and improve the dendrite problem caused by uneven zinc deposition-dissolution during the charging and discharging process. The application of the modified composite zinc-based negative electrode in aqueous zinc-based batteries can improve their cycling stability under high current and high utilization conditions and show good rate performance and cycling life.