The same agreement was found when other experimental parameters were adjusted, such as sample size R abs , specific heat capacity C p and thermal conductivity κ (see Fig- ). These results indicate that the surface displacement magnitude is roughly in proportion to the absorber's volume (Figure ), while the full width at half maximum (FWHM) of the displacement profile does not show a proportional increase with the absorber's size (see Figure ). Moreover, the physical properties of the matrix material play a crucial role in the signal intensity and and the spatial resolution (given by the shape of the surface displacement). A matrix material with low heat capacity and thermal conductivity leads to higher signal intensity at the surface (Figure ). This occurs due to the rapid heating characteristic of a material with low specific heat capacity, coupled with its limited thermal conductivity that impedes efficient heat conduction. Consequently, heat is redistributed from the absorber into the matrix material more slowly, resulting in a higher temperature and corresponding higher thermal expansion. On the other hand, a matrix material with high specific heat capacity and low thermal conductivity shows narrower surface displacement profiles. The increased heat capacity facilitates superior thermal confinement, reducing the spread of heat and enhancing the spatial resolution of the imaging (Figure ). Additionally, the low thermal conductivity helps to minimize heat dissipation, further enhancing the resolution of AFM-IR imaging (Figure ).