Using atom transfer radical polymerization to amplify monolayers of initiators patterned by microcontact printing into polymer brushes for pattern transfer

  • Shah R
  • Merreceyes D
  • Husemann M
 et al. 
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We report the use of atom transfer radical polymerization (ATRP) to amplify initiators patterned on films of gold into polymer brushes of poly(methyl methacrylate) (PMMA), poly(hydroxyethyl methacrylate) (PHEMMA), poly(tert-butyl methacrylate) (PTBA), poly(isobornyl methacrylate) (PIBMA), and poly((dimethylamino)ethylmethyl acrylate) (PDMAEMA). Pattern transfer into gold substrates underlying polymer brushes was achieved by using the patterned brushes as barriers to wet chemical etchants of gold. The surface-confined initiators for ATRP were prepared by the self-assembly of (BrC(CH3)2COO(CH2) 10S)2 (I) on films of gold. These monolayers were assembled from solutions of hexadecane at 60 °C so as to prevent their thermal desorption during ATRP (also performed at 60 °C). By measuring the resistance offered by these brushes to etching of underlying films of gold by aqueous solutions of KI/I2, KCN/K3Fe(CN)6, and 50 vol % aqua regia (70 vol % HNO3 and 30 vol % HCl), we conclude that both the thickness and chemi...

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  • Rahul R. Shah

  • David Merreceyes

  • Marc Husemann

  • Ian Rees

  • Nicholas L. Abbott

  • Craig J. Hawker

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