Material modification is the academic concept and research area focused on the deliberate or induced alteration of the fundamental physical, chemical, or nuclear properties of materials, often at the atomic or subatomic level. This field investigates the mechanisms, processes, and consequences of such transformations, including nuclear reactions like fission and fusion that involve changes in atomic nuclei, resulting in significant energy release or absorption and the formation of new elements or isotopes. Its significance lies in understanding natural phenomena such as stellar energy generation and enabling technological applications like controlled nuclear power generation and advanced material synthesis.