SIZE-DEPENDENT REDOX POTENTIALS OF QUANTIZED ZINC-OXIDE MEASURED WITH AN OPTICALLY TRANSPARENT THIN-LAYER ELECTRODE

We have investigated the spectroelectrochemistry of quantum sized zinc oxide colloids of different sizes. It could be shown that electron injection occurs from the metal electrode into the quantized states of the small particles. The measured size-dependent redox potentials are in accordance with quantum mechanical particle-in-a-box calculations. Furthermore, the spectral changes occurring upon reduction of the particles are discussed and compared to the number of electrons stored.