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← ScienceWhich mechanism limits electron beam resolution in scanning tunneling microscopy when imaging soft materials?
A)Thermal drift causing tip instability
B)Electron-phonon interactions causing heating✓
C)Electromagnetic interference from power supply
D)Surface contamination altering tunneling current
💡 Explanation
When an electron beam interacts with soft materials, electron-phonon interactions transfer energy to the lattice, causing localized heating and sample deformation which reduces image resolution. Therefore, electron-phonon interactions affect the image quality, rather than tip instability, EMI, or surface contamination which require specific different conditions.
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