Who is credited with inventing both the ion microscope and the field-emission microscope?

Erwin W. Muller is credited with the invention of both the ion microscope and the field-emission microscope, making significant contributions to the field of microscopy. The ion microscope, which utilizes ion beams to image samples, allows for high-resolution imaging and has applications in various scientific fields, including materials science and biology. Similarly, the field-emission microscope enables the visualization of materials at an atomic level by using the principle of field emission to generate electrons. Muller's pioneering work in these areas not only advanced the capabilities of microscopy but also provided researchers with powerful tools for studying the micro and nano structures of materials. His innovative approaches laid the groundwork for modern electron microscopy techniques, enhancing our understanding of materials and nano-scale phenomena.