Elucidating the Role of Surface Hydrolysis in Preparing Organosilane Nanostructures via Particle Lithography

Li, Jie Ren; Garno, Jayne C.

doi:10.1021/nl0806062

Cited by 83 publications

(101 citation statements)

References 82 publications

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“…b Generalized mechanism for the hydrolysis of trichlorosilanes on surfaces [198,431]. Adapted from Ref [198,431] Copyright 1980 and 2008 American Chemical Society densed in the form of flat aggregates in the solution which were then adsorbed onto the substrate. As the aggregates are formed in the solution and not on the surface, they cover the surface at a faster rate.…”

Section: Chemistry and Mechanism Of Alkylsilane Sam Formationmentioning

confidence: 99%

“…Li et al have carried out the synthesis of nanostructures by the method of particle lithography using organosilane SAMs [431]. Figure 12 shows a schematic diagram of the technique.…”

Section: Particle Lithographymentioning

confidence: 99%

“…b A vapor of alkylsilanes is generated by heating a sealed vessel. c The latex mask is rinsed away to reveal silane nanopatterns [431]. Adapted from Ref [431] Copyright 2008 American Chemical Society gradient.…”

Section: Surface Gradient Formation Using Samsmentioning

confidence: 99%

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Silicon Based Nanocoatings on Metal Alloys and Their Role in Surface Engineering

Bhure¹,

Mahapatro

2010

Silicon

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Metals and their alloys have been widely used in all aspects of science and engineering. However the science of nanotechnology is driving newer demands and requirements for better performance of existing materials and also at a higher level of precision. This is naturally presenting complicated demands on the surface of these metals with a need for surface modification. Self Assembled Monolayers (SAMs) are nanosized coatings that present the most efficient method of carrying out surface modification. Alkylsilanes are silicon based SAMs which are compatible with the majority of metals and alloys. These nanocoatings can serve primary functions such as surface coverage, etch protection and anti corrosion, along with a host of other secondary chemical functions because of their amphiphilic nature. We present a brief introduction to surface modification of metals and alloys followed by a detailed description of silane based nanocoatings and their applications in technology. Then a look at the engineering aspects of these coatings in terms of patterning techniques is presented along with a discussion of the applications of patterned SAMs.

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Section: Chemistry and Mechanism Of Alkylsilane Sam Formationmentioning

confidence: 99%

“…Li et al have carried out the synthesis of nanostructures by the method of particle lithography using organosilane SAMs [431]. Figure 12 shows a schematic diagram of the technique.…”

Section: Particle Lithographymentioning

confidence: 99%

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Silicon Based Nanocoatings on Metal Alloys and Their Role in Surface Engineering

Bhure¹,

Mahapatro

2010

Silicon

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“…Previously, we introduced several particle lithography-based protocols for patterning organosilanes using steps of vapour deposition, immersion or contact printing [51,52]. The surface selectivity of organosilane nanopatterns prepared with particle lithography approaches can be further applied to define the placement of other molecules and nanoparticles [53,54].…”

Section: Introductionmentioning

confidence: 99%

Spatially selective surface platforms for binding fibrinogen prepared by particle lithography with organosilanes

2013

Self Cite

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One contribution of 10 to a Theme Issue 'Molecular-, nano-and micro-devices for real-time in vivo sensing'. We introduce an approach based on particle lithography to prepare spatially selective surface platforms of organosilanes that are suitable for nanoscale studies of protein binding. Particle lithography was applied for patterning fibrinogen, a plasma protein that has a major role in the clotting cascade for blood coagulation and wound healing. Surface nanopatterns of mercaptosilanes were designed as sites for the attachment of fibrinogen within a protein-resistant matrix of 2-[methoxy( polyethyleneoxy)propyl] trichlorosilane (PEG-silane). Preparing site-selective surfaces was problematic in our studies, because of the self-reactive properties of PEG-organosilanes. Certain organosilanes presenting hydroxyl head groups will cross react to form mixed surface multi-layers. We developed a clever strategy with particle lithography using masks of silica mesospheres to protect small, discrete regions of the surface from cross reactions. Images acquired with atomic force microscopy (AFM) disclose that fibrinogen attached primarily to the surface areas presenting thiol head groups, which were surrounded by PEG-silane. The activity for binding anti-fibrinogen was further evaluated using ex situ AFM studies, confirming that after immobilization the fibrinogen nanopatterns retained capacity for binding immunoglobulin G. Studies with AFM provide advantages of achieving nanoscale resolution for detecting surface changes during steps of biochemical surface reactions, without requiring chemical modification of proteins or fluorescent labels.

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“…To form the gold nanoparticle array, the exposed surface (hydroxides) was immersed in a solution of tin ions, followed by silver ions, and then gold ions [11]. In another paper, shallow nanowells were formed on a silicon wafer via the vapor deposition of chlorosilanes around the latex sphere [10,16,17]. The hydroxylated surface located at the bottom of the nanowells was then functionalized with mercaptopropyltrimethoxysilane and subsequently used to bind gold nanoparticles [10].…”

Section: Introductionmentioning

confidence: 99%

Size and Shape Control of Gold Nanodeposits in an Array of Silica Nanowells on a Gold Electrode

Rue

Collinson

2012

International Journal of Electrochemistry

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Ordered arrays of hemispherical nanowells were formed in a sol-gel-derived silica film on a gold electrode using 500 nm diameter polystyrene latex spheres as templates. The conductive domain located at the bottom of each nanowell upon template removal was enlarged via electroless deposition from a gold plating solution. The structured electrodes thus formed were characterized using scanning electron microscopy and atomic force microscopy. Depending on the method used to make the films, the extent of the long-range packing and the size of the conductive domain changed. Electroless deposition in the nanowells produced (near) sphere-like nanostructures of gold, the size of which depended on the incubation time in the plating solution and the size of the conductive domain. Longer exposure times yielded nanostructures that filled the nanowell, whereas smaller exposure time yielded much smaller structures. Significantly larger, rougher deposits were formed in nanowells with large conductive domains. The electrochemical response observed at these electrodes was strongly dependent on the extent of long-range packing, the presence of defect sites in the film and their relative spacing, and the redox species in solution.

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Elucidating the Role of Surface Hydrolysis in Preparing Organosilane Nanostructures via Particle Lithography

Cited by 83 publications

References 82 publications

Silicon Based Nanocoatings on Metal Alloys and Their Role in Surface Engineering

Silicon Based Nanocoatings on Metal Alloys and Their Role in Surface Engineering

Spatially selective surface platforms for binding fibrinogen prepared by particle lithography with organosilanes

Size and Shape Control of Gold Nanodeposits in an Array of Silica Nanowells on a Gold Electrode

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