The wave-particle duality of matter
In 1807 Thomas Young performed the famous double slit experiment  showing that light propagates like a delocalized wave.
100 years later it was suggested by Einstein on thermodynamical grounds and in order to explain the photo effect, that light also behaves as a particle .
In 1923 Louis de Broglie drew the analogy between light and matter with the hypothesis that every massive object should be associated with a quantum wave, as well .
The convincing power of grating diffraction in illustrating quantum delocalization and interference led to the election of far-field electron diffraction [9, 10] as the “most beautiful experiment in physics”, in a poll by Physics World  in 2002.
Our studies, accomplished with chemistry partners around Prof. Mayor in Basel and our nanotechnology partners around Prof. Cheshnovsky in Tel Aviv, extend this idea and optically visualize for the first time the emergence of a deterministic 2D quantum interference pattern from stochastically arriving single phthalocyanine molecules .
In contrast to photons which are eliminated in the act of measurement, molecular interferograms can stay for many hours and be potentially interfaced with subsequent manipulation steps.