Determination of the acid-base properties for 3-amino, 3-chloro and 3-mercaptopropyltrimethoxysilane coatings on silica surfaces by XPS

Horr, Thomas J.; Arora, Pawittar S.

doi:10.1016/s0927-7757(96)03927-1

Cited by 72 publications

(62 citation statements)

References 7 publications

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“…This additional state correlates to various possible interactions of the amine group with adsorbed water, the surface, and inter-and intramolecular silanol groups [9,19,26]. Consequently, the higher binding energy state can be attributed to multilayer formation, as amine groups then interact with the silanol groups of the next layer [19].…”

Section: Surface Analysismentioning

confidence: 98%

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Steinbach

Sandner

Mizaikoff

et al. 2015

Phys. Status Solidi C

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Designing a microfabrication process for lab-on-a-chip systems can at times be challenging, and the need to integrate a chemical surface modification reaction into this process can limit the options. Therefore, a robust set-up and protocol for the gas phase modification has been developed that can be variably integrated into microfabrication processes. The main improvement compared to similar methods is, besides easy and versatile sample handling, the integration of a continuous argon flow percolating through the liquid organosilane, and impinging directly the surface to be modified. This measure reduces the argon consumption drastically compared to current reaction schemes, while keeping short reaction periods.Silicon substrates were modified using 3-mercaptopropyltrimethoxysilane (MPTMS) and 3-aminopropyltrimethoxysilane (APTMS), thoroughly studied for different reaction stages, and compared to surfaces modified via a common solvent-based procedure from isopropanolic solution. Water contact angle measurements, infrared spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscopy verified the successful deposition of the alkylsilane. Additionally, silicon nanowires were assembled, exemplary for a lab-on-a-chip system, in a liquid gate field-effect-transistor configuration, and electrically characterized. The devices showed the expected response to applied liquid gate potentials before and after the modification and exhibited characteristic changes in the transconductance curve.

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Section: Surface Analysismentioning

confidence: 98%

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Steinbach

Sandner

Mizaikoff

et al. 2015

Phys. Status Solidi C

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“…One way to circumvent this issue is to derivatize the substrate with a layer of molecules designed to enhance metal nucleation by interacting strongly with both the substrate and the incoming metal atoms (i.e., a molecular adhesive), thereby suppressing surface diffusion and promoting the growth of continuous metal fi lms at low thickness. [34][35][36][37] Thiol functionalized silanes have previously been investigated for this purpose, since thiols have a strong affi nity for Au and Ag, whilst organosilanes couple with native hydroxyl groups on a variety of substrate materials [34][35][36] to form strong siloxane bonds. Hatton et al [ 37 ] have previously reported the viability of this approach for Au fi lms on glass using a thiol functionalized molecular adhesive layer and have demonstrated application in organic light-emitting diodes.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Transparent Au Electrodes for Organic Photovoltaics Fabricated Using a Mixed Mono‐Molecular Nucleation Layer

Stec

Williams

Jones

et al. 2011

Adv Funct Materials

112

100

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A rapid, solvent free method for the fabrication of highly transparent ultrathin (∼8 nm) Au films on glass has been developed. This is achieved by derivatizing the glass surface with a mixed monolayer of 3‐mercaptopropyl(trimethoxysilane) and 3‐aminopropyl(trimethoxysilane) via co‐deposition from the vapor phase, prior to Au deposition by thermal evaporation. The mixed monolayer modifies the growth kinetics, producing highly conductive films (∼11 Ω per square) with a remarkably low root‐mean‐square roughness (∼0.4 nm) that are exceptionally robust towards UV/O3 treatment and ultrasonic agitation in a range of common solvents. As such, they are potentially widely applicable for a variety of large area applications, particularly where stable, chemically well‐defined, ultrasmooth substrate electrodes are required, such as in organic optoelectronics and the emerging fields of nanoelectronics and nanophotonics. By integrating microsphere lithography into the fabrication process, we also demonstrate a means of tuning the transparency by incorporating a random array of circular apertures into the film. The application of these nanostructured Au electrodes is demonstrated in efficient organic photovoltaic devices where it offers a compelling alternative to indium tin oxide coated glass.

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“…3(b)), which was fitted for two components at 399.7 and 401.9 eV and assigned to non-protonated and protonated imidazole groups, respectively. The protonation could be due to the interaction with the surface silanol groups, 3,9 as they have pK a values in the range of 3.67 to 4.82, and 6.37 to 7.01 10 and alkylimidazole has a pK a value around 7.5.…”

Section: Resultsmentioning

confidence: 99%

XPS analysis of electronic density of iron tetraazamacrocycle through Fe 2p binding energies on the 3‐imidazolilpropyl‐modified surface of oxidized n‐Si(100)

Andresa

Moreira

Magalhães

et al. 2004

Surface & Interface Analysis

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This paper describes the preparation of metallo-organic thin films of [FeTIM(CH 3 CN) 2 ]2+ complex, where TIM stands for 2,3,9,10-tetramethyl-1,4,8,11-tetraazacyclotetradeca-1,3,8,10-tetraene on oxidized silicon wafer, SiO 2 /Si, previously treated with 3-imidazolilpropyltrimethoxysilane, 3-IPTS. X-ray photoemission lines of Fe 2p were used to probe the iron chemical environment in the physically and chemically adsorbed macrocycle complexes. As FeTIM can bind CO, NO or N-heterocycle, a built-on Si wafer sensor device could be envisaged for these molecules.

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Determination of the acid-base properties for 3-amino, 3-chloro and 3-mercaptopropyltrimethoxysilane coatings on silica surfaces by XPS

Cited by 72 publications

References 7 publications

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Gas phase silanization for silicon nanowire sensors and other lab‐on‐a‐chip systems

Ultrathin Transparent Au Electrodes for Organic Photovoltaics Fabricated Using a Mixed Mono‐Molecular Nucleation Layer

XPS analysis of electronic density of iron tetraazamacrocycle through Fe 2p binding energies on the 3‐imidazolilpropyl‐modified surface of oxidized n‐Si(100)

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