Binary mixtures of self-assembled monolayers of 1,8-octanedithiol and 1-octanethiol for a controlled growth of gold nanoparticles

Aliganga, Anne Kathrena A.; Duwez, Anne‐Sophie; Mittler, Silvia

doi:10.1016/j.orgel.2006.03.013

Cited by 29 publications

(35 citation statements)

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“…Results are averages of at least three separate measurements. 43 44 and indeed, annealing of the SAM at 90°C for 2 h also yields an ACA of 70 ( 2°and a hysteresis on the order of 5°. Annealing thus has a significant effect on the homogeneity and roughness of the SAM.…”

Section: Cell Culture Experiments Preosteoblastic Cellline Mc3t3-e1mentioning

confidence: 82%

Polymer Brush Controlled Bioinspired Calcium Phosphate Mineralization and Bone Cell Growth

et al. 2011

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Polymer brushes on thiol-modified gold surfaces were synthesized by using terminal thiol groups for the surface-initiated free radical polymerization of methacrylic acid and dimethylaminoethyl methacrylate, respectively. Atomic force microscopy shows that the resulting poly(methacrylic acid) (PMAA) and poly(dimethylaminoethyl methacrylate) (PDMAEMA) brushes are homogeneous. Contact angle measurements show that the brushes are pH-responsive and can reversibly be protonated and deprotonated. Mineralization of the brushes with calcium phosphate at different pH yields homogeneously mineralized surfaces, and preosteoblastic cells proliferate on both the nonmineralized and mineralized surfaces. The number of living cells on the mineralized hybrid surfaces is ca. 3 times (PDMAEMA) and 10 times (PMAA) higher than on the corresponding nonmineralized brushes.

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Section: Cell Culture Experiments Preosteoblastic Cellline Mc3t3-e1mentioning

confidence: 82%

Polymer Brush Controlled Bioinspired Calcium Phosphate Mineralization and Bone Cell Growth

et al. 2011

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“…Using MPTS with its SH head group for supporting covalent bonds between the Au NPs and their substrate has the advantage in a binary mixture of CH 3 -and SH-terminated silanes to control the density of nucleation sites for Au OMCVD. [75] Since the Au(4f) high-resolution XPS has been used to characterize the Au/RS SAMs, [76] Au(4f 5/2 ) and Au(4f 7/2 ) binding energy peaks were recorded for the silicon samples with and without OTS SAM and additional MPTS treatment. Figure 5 clearly depicts Au(4f 5/2 ) and Au(4f 7/2 ) peaks for a sample without an OTS resist SAM, while there is a featureless spectrum with no recognizable peak for the OTS resist sample.…”

Section: Resultsmentioning

confidence: 99%

Octadecyltrichlorosilane (OTS): a resist for OMCVD gold nanoparticle growth

Rezaee

Davidson

Manifar

et al. 2009

Surface & Interface Analysis

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One application of octadecyltrichlorosilane (OTS) self-assembled monolayers (SAMs) is its use as thin film resists. In this work, we demonstrated that OTS SAMs can be reliable resists for organo-metallic chemical vapor deposition (OMCVD) grown gold nanoparticles (Au NPs). In optical sensing applications based on Au NPs, one candidate system consists of patterned OTS SAMs and precisely grown OMCVD Au NPs for achieving a high sensitivity. As an initial step, the OTS SAMs need to perfectly resist the OMCVD Au NP growth. Hence the optimized formation of the OTS SAMs affected by different assembly times and baking temperatures was studied by contact angle, ellipsometry, XPS, SEM, and atomic force microscopy (AFM). To demonstrate the ability of the OTS SAMs to resist OMCVD Au NP growth, the OMCVD process was carried out on two sets of samples: OTS SAMs fabricated under optimized conditions on one set and the other set without OTS SAMs. High-resolution XPS, RBS, SEM, and ultraviolet-visible (UV-Vis) spectroscopy were applied to study the growth of Au NPs on the samples with and without OTS SAM resists.

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“…However, laying-flat and, therefore binding through the two -SH groups to the surface have been obtained at low surfaces coverages when the assembling is carried out in UHV [2,3] and in solution [4,5]. In order to obtain compact monolayers of standing-up dithiol molecules, different preparation methods that include protection of the second thiol group [6] or using a mixture of monothiol and dithiol at the appropriate relative concentrations that results in an almost pure dithiol film [7,8], have been reported.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of a 1,8-octanedithiol self-assembled monolayer (ODT-SAM) on a Au(111) single crystal electrode

García-Raya

Madueño

Sevilla

et al. 2008

Electrochimica Acta

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Binary mixtures of self-assembled monolayers of 1,8-octanedithiol and 1-octanethiol for a controlled growth of gold nanoparticles

Cited by 29 publications

References 50 publications

Polymer Brush Controlled Bioinspired Calcium Phosphate Mineralization and Bone Cell Growth

Polymer Brush Controlled Bioinspired Calcium Phosphate Mineralization and Bone Cell Growth

Octadecyltrichlorosilane (OTS): a resist for OMCVD gold nanoparticle growth

Electrochemical characterization of a 1,8-octanedithiol self-assembled monolayer (ODT-SAM) on a Au(111) single crystal electrode

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