Grafting of single, stimuli-responsive poly(ferrocenylsilane) polymer chains to gold surfaces

Langmuir : the ACS Journal of Surfaces and Colloids
Shan ZouG Julius Vancso

Abstract

Redox-responsive poly(ferrocenylsilane) (PFS) polymer molecules were attached individually to gold surfaces for force spectroscopy experiments on the single molecule level. By grafting ethylenesulfide-functionalized PFS into the defects of preformed self-assembled monolayers (SAMs) of different omega-mercaptoalkanols on Au(111), the surface coverage of PFS macromolecules could be conveniently controlled. Atomic force microscopy (AFM), contact angle, as well as cyclic and differential pulse voltammetry measurements were carried out to characterize the morphology, wettability, and surface coverage of the grafted layers. The values of the PFS surface coverage were found to depend on the chain length of the omega-mercaptoalkanol molecules and on the concentration of the PFS solution but not on the insertion time or on the molar mass of PFS. The equilibrium surface coverages were successfully described by Langmuir adsorption isotherms. For low-surface coverage values (< 6.2 x 10(-4) chain/nm2), achieved by PFS insertion from very dilute solutions (8 x 10(-6) M) into long-chain SAMs, AFM and differential pulse voltammetry showed that surfaces exposing isolated individual polymer chains were obtained. The isolated PFS macromolecules w...Continue Reading

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Citations

Jul 17, 2013·Analytica Chimica Acta·Molla R IslamMichael J Serpe
Jun 26, 2007·Angewandte Chemie·Vasilios Bellas, Matthias Rehahn
Sep 12, 2007·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Marina I Giannotti, G Julius Vancso
Jan 20, 2012·Advances in Colloid and Interface Science·A J B Milne, A Amirfazli
Jun 28, 2016·Chemical Society Reviews·Rebekah L N HailesIan Manners
May 26, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Ying YuXianhong Wang
Jan 15, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Xueling FengG Julius Vancso
Sep 17, 2019·ACS Applied Materials & Interfaces·Marco CirelliG Julius Vancso
May 18, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Mária PéterG Julius Vancso

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