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Ohm's Law May Not Be Relevant importantmeasurementsmadeonnanoscale Since differential conductance (dI/dV)
The demand for smaller, lower power devices,butitpresentsauniquesetofchal- is directly proportional to the density of
electronic devices is fueling nanotechnol- lenges.Fortunately,newmeasurementtech- states, it is the most direct measurement of
ogy development. Researchers are striving niques are making this type of study much this phenomenon. Such measurements can
to understand the quantum level structure easier. identifyconditionsunderwhichconductance
andbehaviorofnanoscaledevicesandhow reaches a maximum, i.e., the electron ener-