“…When D becomes comparable to the chain size, then the shift of the Θ temperature is determined by t ≅ b / R Gauss , which is simply $t \propto 1/\sqrt N$ , as it must be the case for the collapse of polymer chains in bulk. The geometry dependence of the Θ temperature has recently been studied for a polymer confined between two parallel plates (slit geometry) by using numerical methods 9–12. For completeness, we would like to remark that naive scaling for a simple slit geometry predicts t c,slit = ( b / D ) 0 , which suggests a logarithmic dependence, t c,slit ∝ log( D / b ), but this needs further investigation.…”