Tapping AFM-IR+

thumb up best resolution among AFM-IR methods
thumb up works for thick & thin samples
thumb up excellent surface sensitivity
thumb up tapping mode (noninvasive)

PTE+ (resonance-enhanced PTE)

thumb up enhanced sensitivity compared to PTE
thumb up works for thick & thin samples
thumb up nanoscale resolution for thin samples
thumb down resolution depends on thickness & morphology
thumb down contact mode (tip & sample damage)

PTE (classic Photo-Thermal Expansion)

thumb up simple setup without laser-feedback
thumb up cost efficient (lowest price/wavenumber)
thumb up insensitive to bond orientation
thumb down poor spatial resolution
thumb down works for thick samples only
thumb down contact mode (tip & sample damage)