Researchers at Nanyang Technological University have demonstrated that ordinary graphite flakes, some as thin as 10 nanometers, can produce tunable soft X-rays in the “water window,” a narrow band of wavelengths between 2.3 and 4.4 nanometers where water is transparent but carbon-based tissue absorbs strongly. The technique replaces building-sized synchrotron facilities with a table-sized setup, […]