Figure 4From: STM-induced light emission from thin films of perylene derivatives on the HOPG and Au substrates Photoluminescence spectrum excited by an Ar-Ne laser at 514 nm (green line) and STM-LE spectrum (blue line) of PTCDI-C7 thin film on HOPG substrate (Vs = +2.2 V, It = 20 nA, acquisition time = 15 min).Back to article page