Attachment of Alkyltrichlorosilanes to the Terminal 3,5-Dihydroxyphenyl Moiety of a Self-assembled Thiol Monolayer on Gold

Gothelf, Kurt V.; Larsen, Allan G.

doi:10.1006/jcis.2002.8672

Cited by 5 publications

(4 citation statements)

References 30 publications

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“…The degree of blocking, i.e., blocking efficiency, is expressed as Y %, with Y % = (1 − A / B )%, where B is the integrated area of the voltammogram (i.e., current vs applied voltage curve) measured on bare clean gold and A is the integrated area of the voltammogram measured on the gold surface modified by a nonconductive adlayer. The blocking efficiency provides an indirect measure of surface coverage of the adlayer. ,− For a gold surface modified by the polymeric monolayer, a significant attenuation of the faradaic current of the redox probe Fe(CN) 6 3- was observed in the CV measurements as shown in Figure . With Fe(CN) 6 3- , the blocking efficiencies of these polymeric monolayers varied from 93.5 to 99.0% (Table ).…”

Section: Resultsmentioning

confidence: 99%

“…According to the literature, a Ru(NH 3 ) 6 3+ probe more easily penetrates through a monolayer than Fe(CN) 6 3- , and as such, it is more sensitive to defects in the monolayer than Fe(CN) 6 3- . − Therefore, the blocking efficiency measured with Ru(NH 3 ) 6 3+ is an indirect measure of the amount of defects in the polymeric monolayer. We assume that the amount of defects is directly related to chains packing density in a monolayer, − in that less defects indicate a higher packing density. Consequently, when the blocking efficiency of the various monolayers for Ru(NH 3 ) 6 3+ is compared, we are able to compare the relative degree of packing density of the polymeric monolayers.…”

Section: Resultsmentioning

confidence: 99%

“…The blocking efficiency provides an indirect measure of surface coverage of the adlayer. 20, [59][60][61][62] For a gold surface modified by the polymeric monolayer, a significant attenuation of the faradaic current of the redox probe Fe(CN) 6 3was observed in the CV measurements as shown in Figure 1. With Fe(CN) 6 3-, the blocking efficiencies of these polymeric monolayers varied from 93.5 to 99.0% (Table 1).…”

Section: Resultsmentioning

confidence: 99%

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Solvent-Controlled Organization of Self-Assembled Polymeric Monolayers on Gold: An Easy Approach for the Construction of Protein Resistant Surfaces

et al. 2005

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Protein resistant surfaces based on poly(ethylene glycol) (PEG) coatings are extensively applied in the fields of biosensors, tissue engineering, fundamental cell-surface interaction research, and drug delivery systems. The structural organization of the PEG film on the surface has a significant effect on the performance of the film to resist protein adsorption. In this paper, we report an approach using solvent to control the organization of the polymeric monolayer on gold. A water soluble copolymer with grafted PEG side chains and alkyl disulfide side chains was synthesized. A polymeric monolayer was fabricated on a gold surface from different solutions (water- and toluene-based) of the copolymer. The organization of the polymeric monolayers was characterized by means of ellipsometry, cyclic voltammetry, contact angle, X-ray photoelectron spectroscopy, and atomic force microscopy. It was proven that the structural organization of the polymeric monolayer on a gold surface could be controlled by the solvent. A polymeric monolayer with PEG enriched at the outer level is obtained when water is used as the solvent. Various types of proteins, including fibrinogen, albumin, and normal human serum, were used to test the protein resistance of the gold surfaces modified by the polymeric monolayers. The polymeric monolayer formed from a water solution of the copolymer showed excellent protein resistance. In addition, by using water as the solvent, patterning of the polymeric monolayer could easily be achieved through a combination of lift-off and self-assembly. We believe that the approach reported here provides an easy, fast, and efficient way to fabricate a robust protein resistant surface.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Solvent-Controlled Organization of Self-Assembled Polymeric Monolayers on Gold: An Easy Approach for the Construction of Protein Resistant Surfaces

et al. 2005

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“…For the μCP method, the SWNT Langmuir film was transferred on the prepatterned PDMS stamp fabricated according previous literatures, ,,− and it was dried for 10 min under ambient conditions. The Si substrates cleaned using UVO cleaner (Jelight Inc., 42-220) were surface modified by using 1.0% ethanolic solution of 3-(aminopropyl)triethoxysilane. , The amino-modified substrate was brought into conformal contact with the PDMS stamp inked with SWNT LB film. The stamp was carefully peeled away after contacting with the substrate for 5 min.…”

Section: Methodsmentioning

confidence: 99%

Patterning of Hierarchically Aligned Single-Walled Carbon Nanotube Langmuir−Blodgett Films by Microcontact Printing

et al. 2010

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We present a patterning method for hierarchically aligned assembly of single-walled carbon nanotubes (SWNTs) using a combination of the Langmuir-Blodgett (LB) technique and soft lithography. The LB technique allows one to control the alignment and the surface density of SWNTs by adjusting surface pressure of the film at the air-water interface. The aligned SWNT Langmuir films are successfully transferred onto the polydimethylsiloxane (PDMS) or silicon substrate with unidirectional alignment, and SWNT patterns with various shapes are fabricated on silicon and flexible poly(ethylene terephthalate) (PET) substrates by contacting and peeling off the PDMS stamp from the substrates via microcontact printing or lift-up methods. The SWNT patterning technique using the combination of soft lithography and the LB method can be applied in various fields, such as flexible high-speed transistors, high-efficiency solar cells, and transparent electrodes.

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Fabrication of ultrathin polyelectrolyte fibers and their controlled release properties

Chunder

Sarkar

et al. 2007

Colloids and Surfaces B: Biointerfaces

105

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Attachment of Alkyltrichlorosilanes to the Terminal 3,5-Dihydroxyphenyl Moiety of a Self-assembled Thiol Monolayer on Gold

Cited by 5 publications

References 30 publications

Solvent-Controlled Organization of Self-Assembled Polymeric Monolayers on Gold: An Easy Approach for the Construction of Protein Resistant Surfaces

Solvent-Controlled Organization of Self-Assembled Polymeric Monolayers on Gold: An Easy Approach for the Construction of Protein Resistant Surfaces

Patterning of Hierarchically Aligned Single-Walled Carbon Nanotube Langmuir−Blodgett Films by Microcontact Printing

Fabrication of ultrathin polyelectrolyte fibers and their controlled release properties

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