title: Sulfonic Acid-functionalized gold nanoparticles: a colloid-bound catalyst for soft lithographic application on self-assembled monolayers.
abstract: In this report, we present a new lithographic approach to prepare patterned surfaces. Self-assembled monolayers (SAMs) of the acid-labile trimethylsilyl ether (TMS-OC(11)H(22)S)(2) (TMS adsorbate) was formed on gold. 5-Mercapto-2-benzimidazole sulfonic acid sodium salt (MBS-Na(+)) was used as a ligand for gold nanoparticles. These monolayer-protected gold colloids (MPCs) were transformed into the catalytically active H(+)-form by ion exchange. This colloid-bound catalyst hydrolyzed the TMS adsorbate (TMS-OC(11)H(22)S)(2) both in solution and when self-assembled on gold surfaces. Microcontact printing of the active colloid-bound catalyst on the preformed TMS SAM led to the deposition of the colloid onto the SAMs. After the catalyst nanoparticles were rinsed off, a patterned surface was created as shown by AFM.
authors.affiliation: Laboratory of Supramolecular Chemistry and Technology, MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Li
authors.forename: Vasile
authors.initials: V
authors.lastname: Paraschiv
authors.forename: Jurriaan
authors.initials: J
authors.lastname: Huskens
authors.forename: David N
authors.initials: DN
authors.lastname: Reinhoudt