| A polymer and its production method provided by the disclosure use HAMA to modify the hydrogel. The modified hydrogel has properties of being insusceptible to breaking and has moderate strength for cutting and scanning. The modified hydrogel combined with iExM’s technology may achieve a magnification of 60 times or more. In this way, the modified and expanded hydrogel sample may be cut for performing a layer-by-layer microscopic observation, so that the application of expansion microscopy is no longer limited by samples that are too large to be operated within the limited working distance, the application scope of expansion microscopy may be improved, and the novel iExM modified hydrogel system may be further applied to biological tissues to achieve a resolution scale of nearly tens of nanometers, so as to gain insight into the microstructure and mysteries of biological tissues and a deeper understanding of the structure and physiology of organisms. |