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When Mg surfaces are oxidized the released chemical energy is partly dissipated non-adiabatically by exciting hot charge carriers in the metal surface. Different types of Mg/p-Si(111) Schottky diodes with homogeneous barrier heights of 0.7 and 0.8eV are used to detect chemicurrents during exposure of the devices to oxygen. The detected chemicurrent transients represent the kinetics of the chemical...
Adsorption of ground state nitric oxide and molecular oxygen on Ag at 130 K were observed to produce excited electrons which were detectable as a ''chemicurrent'' in a large area ultrathin film Ag/Si(111) Schottky diode sensor. The charge carriers produced at the surface had sufficient lifetimes and energies to reach the Ag/Si interface (6-8 nm) and surmount the Schottky barrier (=<0.5 eV). The...
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