Heinrich Rohrer was a Swiss physicist born on June 6, 1933. He is best known for his work in the field of nanotechnology, particularly for co-inventing the scanning tunneling microscope (STM) in 1981. This groundbreaking invention allowed scientists to visualize surfaces at the atomic level, significantly advancing the study of materials and nanostructures. In 1986, Rohrer, along with Gerd Binnig, received the Nobel Prize in Physics for their contributions to the development of the STM. His research has had a profound impact on various fields, including physics, chemistry, and materials science, paving the way for innovations in nanotechnology and surface science.