Figure 1From: STM-induced light emission from thin films of perylene derivatives on the HOPG and Au substrates STM topographic images and photon integration maps of PTCDI-C7 thin films. STM topographic images on (a) HOPG and (c) Au substrates, and photon integration maps on (b) HOPG and (d) Au substrates. Pairs of a topographic image and a photon map ((a) and (c), (b) and (d)) were obtained simultaneously (Vs = +2.2 V, It = 20 nA).Back to article page