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The electronic structure of nanoscale moieties (such as molecules and quantumdots) governs the properties and performance of the bottom-up fabricateddevices based on their assemblies. Accordingly, simple and faster experimentalmethods that permit to resolve the electronic density of states of thesenanoscale materials (of which quantum dots are a particular example) are ofgreat importance for the development of man-made nanoscale interfaces andnanoelectronics. In the present work, we propose the quantum rate spectroscopymethodology (and introduce the fundamental physical basis of this technique) asa tool for resolving the electronic structure of zero-dimensional (quantum dot)structures at room temperature and environmental pressure conditions. Thismethod is simpler than the traditional methods based on scanning tunnelingmicroscopy. This spectroscopic approach based on the quantum rate theory wasdemonstrated for CdTe quantum dots, and was used to measure a spectrum thatprovides discrete energy levels that are consistent with those obtained bytunneling microscopy measurements.

Quantum Rate as a Spectroscopic Methodology for Measuring the Electronic Structure of Quantum Dots