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Which outcome results when a quantum dot's confinement dimension approaches the De Broglie wavelength?

A)Quantum tunneling probability is increased
B)Electron-phonon scattering rate decreases
C)Bulk material properties are approached
D)Exciton binding energy decreases rapidly

💡 Explanation

When the size of the quantum dot decreases to the exciton bohr radius, quantum tunneling increases dramatically as wave functions begin to spread beyond physical boundaries. This occurs because quantum confinement dominates transport, therefore, tunneling is enhanced, rather than some transition to bulk behavior.

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