Molar extinction coefficient (ε) of gold colloids
Chemistry/for chemists 2010. 5. 9. 00:22 |Estimation of molar extinction coefficient of gold colloid or Au nanoparticles (NPs)
 x + (2.7688) x^{2} "y = 36.45502 + (-20.30071) x + (2.7688) x^{2}")
http://www.codecogs.com/latex/eqneditor.php
Nine data points (blue diamond) were collected from literatures about gold colloids.[1-6]
Polynomial fitting curve (red) shows good agreement with the reported values.