1925 ca, Paris, FRANCE : The french physicist Louis 7th Duc DE BROGLIE (1892 - 1987), NOBEL PRIZE 1929 FOR PHYSICS. De Broglie made groundbreaking contributions to quantum theory. In his 1924 PhD thesis he postulated the wave nature of electrons and suggested that all matter has wave properties. This concept is known as the de Broglie hypothesis, an example of wave-particle duality, and forms a central part of the theory of quantum mechanics.