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(a) STM topography of a TOPO capped CdSe NC on the hydrogenated surface recorded at and . The inset shows the induced diffusion of the NC. The cross section along the black arrow indicates the height and width of the NC. (b) STM topography of a stearate capped CdSe NC.
curves of the hydrogenated surface (a) and of a CdSe NC capped with TOPO ligands (b). The setpoint conditions are and .
Schematic energy-level diagram of electrons for (a) a zero, (b) a negative, and (c) a positive surface voltage. Numbers indicate the energy levels relative to the vacuum level of the STM tip.
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