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← ScienceWhich energy outcome appears when a quantum dot’s diameter decreases?
A)Bandgap increases in quantum confinement✓
B)Phonon scattering becomes amplitude-dependent
C)Radiative recombination decreases exponentially
D)Surface plasmon resonance shifts redshifted
💡 Explanation
As the quantum dot's diameter shrinks, electrons become more confined. Increased *quantum confinement* raises the energy levels, enlarging the bandgap, because smaller spaces require higher energies. Therefore, the material's bandgap increases due to spatial restriction, rather than other mechanisms like altering phonon spectra.
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