Table 1: List of the hydrophilic liquids that we tested. The asterisks marks the liquids that gave reasonable reflectivities and were subsequently tested interferometrically.
Liquids Surface tension Viscosity (temperature) Molecular weight ($m_{\rm n}$) Composition
  (mN/m) (cSt)    
Poly(EG-ran-PG)* 40.2 650 (25 $^\circ$C) 2500 EG, 75wt%
Poly(EG-ran-PG) (...) 35 000 (25 $^\circ$C) 12 000 EG, 75wt%
Poly(EG-ran-PG) monobutyl ether 36.8 3600 (20 $^\circ$C) 3900 EG, 50wt%
Glycerol* 64.0 685 (25 $^\circ$C) (...) (...)
Poly(PG) (...) 150 (25 $^\circ$C) 1000 (...)
PPG-PEG-PPG 51.0 480 (77 $^\circ$C) 2000 PEG, 50wt%
PEG-PPG-PEG 34.4 850 (25 $^\circ$C) 2900 PEG, 40wt%
Poly(dimethylsiloxane) 21.1 500 (25 $^\circ$C) (...) (...)
Poly(EG) 43.5 4.3 (100 $^\circ$C) 200 (...)
Ethylene glycol* 48.0 20 (25 $^\circ$C) (...) (...)

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