Surface Forces Wiki
CORRELATION BETWEEN SURFACE FREE ENERGY AND SURFACE CONSTITUTION
Manoj K. Chaudhury and George M. Whitesides
Posted by Grant Gonzalez Fall 2012
"Self-assembled monolayers (SAs) of alkylsiloxanes on elastomeric PONS (polydimethylsiloxane) were used as model systems to study interactions between surfaces. Surface free energies (;ysv) of these chemically modified surfaces were estimated by measui'ing the deformations that resulted from the contact between small semispherical lenses and flat sheets of the elastomer under controlled loads. The measured surface free energies correlated with the surface chemical compositions of the SAMs and were commensurate with the values estimated from the measurements of contact angles. This study provides, for the first time, direct experimental evidence for the validity of estimates of the surface free energies of low-energy solids obtained from contact angles."