In a glove box, a 22 mM solution of Grubbs Gen. 2 catalyst was reacted with 11-undecenethiol monolayer substrates on 100-nm gold in a glass slide holder for 45 minutes in methylene chloride at RT, as per the previous section. These wafer was rinsed with clean methylene chloride and transferred to a 10 mg/mL (150 mM) solution of NbEPE in DCM. After 2.5h, a wafer was removed from the polymerization reaction and quenched in a 0.1M solution of vinylferrocene in methylene chloride. However, this substrate did not display a ferrocene signal in cyclic voltammetry, indicating that the polymerization had terminated by that time. The remaining substrates were allowed to polymerize overnight and measured by ellipsometry.