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On the Monolayer Adsorption of Thiol‐Terminated Dendritic Oligothiophenes onto Gold Surfaces
Author(s) -
Jiang Guoqian,
Deng Suxiang,
Baba Akira,
Huang Chengyu,
Advincula Rigoberto C.
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000427
Subject(s) - monolayer , thiophene , self assembled monolayer , dendrimer , alkyl , adsorption , electron transfer , electrochemistry , chemistry , thiol , electrode , quartz crystal microbalance , polymer chemistry , materials science , chemical engineering , nanotechnology , organic chemistry , engineering
The self‐assembled monolayer formation of a series of thiophene dendron thiols with different generations and alkyl chain lengths onto gold surfaces is studied. Average film thicknesses and dielectric constants were calculated from SPR using a two‐subphase differential method. The in situ adsorption of the thiophene dendron thiols was monitored by SPR kinetics measurements and fitted using an empirical three‐step model. Electrochemical redox molecular probing experiments provided additional insight into surface coverage, which showed different abilities to block electron transfer at the monolayer/electrode interfaces. The surface coverage of the films was also estimated by QCM measurements and supported by static WCA measurements.