Effects of surface hydration on the deposition of silane monolayers on silica

Grange, J. D.; Markham, Julie L.; Kurkjian, Charles R.

doi:10.1021/la00031a023

Cited by 267 publications

(265 citation statements)

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“…They can also form on some compound semiconductors, such as InP and GaAs [13]. Although sensitive to moisture in the environment, organosilanes can form SAMs on hydroxylated silicon and silicon dioxide surfaces [14]. Fatty acid molecules will form a SAM on aluminum oxide [15], [16].…”

Section: A Self-assembled Monolayers (Sams) On Solid Substratesmentioning

confidence: 99%

Using self-assembly for the fabrication of nano-scale electronic and photonic devices

Parviz

Ryan

Whitesides

2003

IEEE Trans. Adv. Packag.

178

118

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Abstract-Challenges facing the scaling of microelectronics to sub-50 nm dimensions and the demanding material and structural requirements of integrated photonic and microelectromechanical systems suggest that alternative fabrication technologies are needed to produce nano-scale devices. Inspired by complex, functional, self-assembled structures and systems found in Nature we suggest that self-assembly can be employed as an effective tool for nanofabrication. We define a self-assembling system as one in which the elements of the system interact in pre-defined ways to spontaneously generate a higher order structure. Self-assembly is a parallel fabrication process that, at the molecular level, can generate three-dimensional structures with sub-nanometer precision. Guiding the process of self-assembly by external forces and geometrical constrains can reconfigure a system dynamically on demand. We survey some of the recent applications of self-assembly for nanofabrication of electronic and photonic devices. Five self-assembling systems are discussed: 1) self-assembled molecular monolayers; 2) self-assembly in supramolecular chemistry; 3) self-assembly of nanocrystals and nanowires; 4) self-assembly of phase-separated block copolymers; 5) colloidal self-assembly. These techniques can generate features ranging in size from a few angstroms to a few microns. We conclude with a discussion of the limitations and challenges facing self-assembly and some potential directions along which the development of self-assembly as a nanofabrication technology may proceed.

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Section: A Self-assembled Monolayers (Sams) On Solid Substratesmentioning

confidence: 99%

Using self-assembly for the fabrication of nano-scale electronic and photonic devices

Parviz

Ryan

Whitesides

2003

IEEE Trans. Adv. Packag.

178

118

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“…Self-assembled films from alkyltrichlorosilanes have been widely studied 1-5 because they are interesting for both technological and scientific applications. Chlorosilanes are attractive because they can chemically react with various surfaces [6][7][8] and form closely packed, grafted hydrophobic films, which are used as precursor layers in the study of protein adsorption. 9 OTS is commonly used for the formation of a hydrophobic layer that has high physical and chemical stability on silicon, quartz, and glass surfaces.…”

Section: Introductionmentioning

confidence: 99%

Structure of self-assembled layers on silicon: Combined use of spectroscopic variable angle ellipsometry, neutron reflection, and atomic force microscopy

Styrkas

Keddie

et al. 1999

Journal of Applied Physics

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Identification of the atomic scale structures of the gold-thiol interfaces of molecular nanowires by inelastic tunneling spectroscopy J. Chem. Phys. 136, 014703 (2012) Simultaneous step meandering and bunching instabilities controlled by Ehrlich-Schwoebel barrier and elastic interaction Appl. Phys. Lett. 99, 263106 (2011) Density functional theory simulations of amorphous high-κ oxides on a compound semiconductor alloy: aAl2O3/InGaAs(100)-(4×2), a-HfO2/InGaAs(100)-(4×2), and a-ZrO2/InGaAs(100)-(4×2) J. Chem. Phys. 135, 244705 (2011) Additional information on J. Appl. Phys. Neutron reflection ͑NR͒, spectroscopic ellipsometry ͑SE͒, and atomic force microscopy ͑AFM͒ have been used to characterize the structure of self-assembled octadecyltrichlorosilane ͑OTS͒ layers on silicon. The first two of these techniques rely on modeling of the experimental data and may thus result in the unrealistic representation of the composition and structure at the interface. Ambiguities arise from model-dependent analysis complicated by the lack of sufficient external constraints to converge nonunique solutions to a unique one. We show in this work that AFM measurements provide extra constraints to allow us to obtain a physical description closer to the actual structure of the film. It was found that ''the simpler the better'' modeling strategy very often employed during the fitting of ellipsometric and neutron reflection data is, therefore, not necessarily the best way to obtain a reliable description of the interfacial structure. Our AFM findings necessitated the refit of both neutron and ellipsometric data that were previously described by a single-layer model. Interpretation of the structure of thin layers that is based only on indirect measurements such as SE, NR, and x-ray reflection techniques may be, therefore, misleading. A combined analysis of SE, NR, and AFM data suggests that the OTS film may comprise a rough layer, with pinholes down to bare silicon oxide surface, consisting at least of mono-, bi-and trilayers of OTS molecules.

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“…Bulk water on the surface of the SiO 2 wafer was then blown away with nitrogen because free water may cause undesirable polymerization to ODTS. A thin film of water that remains on the surface is thought to enhance the quality of the C 18 coating (Flinn et al, 1994;Hair and Tripp, 1995;Le Grange and Markham, 1993). Recent studies on growth mechanisms of ODTS formation on silica substrates can be found in the literature (Liu et al, 2001;Peters et al, 2002;Richter et al, 2000).…”

Section: Preparation Of Microchip With C 18 Surfacementioning

confidence: 99%

Micro‐assembly of functionalized particulate monolayer on C₁₈‐derivatized SiO₂ surfaces

Huang¹,

Geng²,

Akin³

et al. 2003

Biotech & Bioengineering

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This work describes a simple approach to immobilize functionalized colloidal microstructures onto a C 18 -coated SiO 2 substrate via specific or non-specific biomediated interactions. Biotinylated bovine serum albumin pre-adsorbed onto a C 18 surface was used to mediate the surface assembly of streptavidin-coated microbeads (2.8 µm), while a bare C 18 surface was used to immobilize anti-Listeria antibody-coated microbeads (2.8 µm) through hydrophobic interactions. For a C 18 surface pre-adsorbed with bovine serum albumin, hydrophobic polystyrene microbeads (0.8 µm) and positively charged dimethylamino microbeads (0.8 µm) were allowed to self-assemble onto the surface. A monolayer with high surface coverage was observed for both polystyrene and dimethylamino microbeads. The adsorption characteristics of Escherichia coli and Listeria monocytogenes on these microbead-based surfaces were studied using fluorescence microscopy. Both streptavidin microbeads preadsorbed with biotinylated anti-Listeria antibody and anti-Listeria antibody-coated microbeads showed specific capture of L. monocytogenes, while polystyrene and dimethylamino microbeads captured both E. coli and L. monocytogenes non-specifically. The preparation of microbead-based surfaces for the construction of microfluidic devices for separation, detection, or analysis of specific biological species is discussed.

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Effects of surface hydration on the deposition of silane monolayers on silica

Cited by 267 publications

References 0 publications

Using self-assembly for the fabrication of nano-scale electronic and photonic devices

Using self-assembly for the fabrication of nano-scale electronic and photonic devices

Structure of self-assembled layers on silicon: Combined use of spectroscopic variable angle ellipsometry, neutron reflection, and atomic force microscopy

Micro‐assembly of functionalized particulate monolayer on C₁₈‐derivatized SiO₂ surfaces

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Effects of surface hydration on the deposition of silane monolayers on silica

Cited by 267 publications

References 0 publications

Using self-assembly for the fabrication of nano-scale electronic and photonic devices

Using self-assembly for the fabrication of nano-scale electronic and photonic devices

Structure of self-assembled layers on silicon: Combined use of spectroscopic variable angle ellipsometry, neutron reflection, and atomic force microscopy

Micro‐assembly of functionalized particulate monolayer on C18‐derivatized SiO2 surfaces

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Product

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Micro‐assembly of functionalized particulate monolayer on C₁₈‐derivatized SiO₂ surfaces