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← ScienceWhich risk increases during pulsed laser deposition with NaCl?
A)Substrate contamination via Coulomb explosion✓
B)Sputtering due to metastable excitation
C)Thermal damage via Auger recombination
D)Quenching via intersystem crossing
💡 Explanation
Substrate contamination increases because the ionic bond between Na and Cl breaks during laser ablation, causing the Coulomb explosion mechanism. This ejects high-energy ions onto the substrate, therefore resulting in film contamination rather than uniform deposition.
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