Development and characterisation of integrated microfluidics on waveguide-based photonic platforms fabricated from hybrid materials

Copperwhite, R.; O’Sullivan, Mary C.; Boothman, Catherine; Gorin, Arnaud; McDonagh, Colette; Oubaha, Mohamed

doi:10.1007/s10404-011-0795-4

Cited by 6 publications

(4 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6] Other promising applications include photoreactive hybrid sol-gel coatings for the fabrication of microstructured components such as optical waveguides, [7] photonic crystals [8] and microfluidic devices. [9] The main advantage of the hybrid sol-gel technology, in comparison to conventional organic or inorganic chemistries, is its flexibility which allows for a combination of both organic and inorganic functional chemistries that facilitates low temperature preparation, generally at room temperature. [5] As a result, structural properties of thermo-sensitive organic groups are maintained and remain available for further exploitation as network modifiers in the inorganic structure and in the microstructuring processes used to fabricate miniature devices.…”

mentioning

confidence: 99%

Synthesis of Fast Curing, Water‐Resistant and Photopolymerizable Glass for Recording of Holographic Structures by One‐ and Two‐Photon Lithography

Mikulchyk

Oubaha

Kaworek

et al. 2022

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

functional materials for tackling challenging material-related problems in diverse areas such as medicine, pharmacy, mechanics, electronics, chemistry and others. [1][2][3][4][5] One of the most popular and successful applications of the hybrid sol-gel technology is the development of multifunctional coatings for the protection of metal surfaces against corrosion and environmental degradations. [6] Other promising applications include photoreactive hybrid sol-gel coatings for the fabrication of microstructured components such as optical waveguides, [7] photonic crystals [8] and microfluidic devices. [9] The main advantage of the hybrid sol-gel technology, in comparison to conventional organic or inorganic chemistries, is its flexibility which allows for a combination of both organic and inorganic functional chemistries that facilitates low temperature preparation, generally at room temperature. [5] As a result, structural properties of thermo-sensitive organic groups are maintained and remain available for further exploitation as network modifiers in the inorganic structure and in the microstructuring processes used to fabricate miniature devices. Among the many applications of the sol-gel technology, the preparation of photopolymerizable glasses for holographic applications is of particular interest. The concept of sol-gel preparation of hybrid organic-inorganic materials by the Advancements in hybrid sol-gel technology have provided a new class of holographic materials as photopolymerizable glasses. Recently, a number of photosensitive glass compositions with high dynamic range and high spatial resolution have been reported and their excellent capability for volume holography has been demonstrated. Nevertheless, challenges remain, particularly in relation to the processing time and environmental stability of these materials, that strongly affect the performance and durability of the fabricated holograms. State-of-the-art photopolymerizable glasses possess long curing times (few days) required to achieve thick films, thus limiting the industrial implementation of this technology and its commercial viability. This article presents a novel, fast curing, water-resistant, photopolymerizable hybrid sol-gel (PHSG) for holographic applications. Due to introducing an amine-based modifier that increases the condensation ability of the sol-gel network, this PHSG overcomes the problem of long curing time and can readily produce thick (up to a few hundred micrometers) layers without cracking and breaking. In addition, this PHSG exhibits excellent water-resistance, providing stable performance of holographic gratings for up to 400 h of immersion in water. This finding moves photopolymerizable glasses to the next development stage and renders the technology attractive for the mass production of holographic optical elements and their use across a wide number of outdoor applications.

show abstract

mentioning

confidence: 99%

Synthesis of Fast Curing, Water‐Resistant and Photopolymerizable Glass for Recording of Holographic Structures by One‐ and Two‐Photon Lithography

Mikulchyk

Oubaha

Kaworek

et al. 2022

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…2. DLS results provide information on the size and homogeneity of the sols and can give early indications of the likely condensation capacity of the materials in the liquid phase during the first 24-h ageing and just prior to coating fabrication [24].…”

Section: Methodsmentioning

confidence: 99%

The role of the hydrolysis and zirconium concentration on the structure and anticorrosion performances of a hybrid silicate sol-gel coating

Cullen

O’Sullivan

Kumar

et al. 2018

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

In sol-gel chemistry, hydrolysis is the key step in the formation of the reactive hydroxide groups that are responsible for the formation of inorganic networks via the occurrence of condensation reactions. Though previous studies have investigated the effect of the hydrolysis conditions on the structure of organically modified silicates (ormosils), no study, to our knowledge, has investigated this variable on the structure of hybrid materials prepared by combinations of an ormosil and a transition metal (TM). Here, we propose to investigate this effect in a hybrid material composed of 3-trimethoxysilylpropylmethacrylate and a zirconium complex. To also highlight the effects of the precursor's concentrations on the hydrolysis and condensation reactions of the hybrid materials, their relative content was altered along with the hydrolysis degree. The anticorrosion barrier properties were identified by characterisation of coatings deposited on AA2024-T3 substrates and correlation between the structure and the anticorrosion properties of the coatings were performed based on results obtained from structural characterisations (DLS, FTIR, 29 Si-NMR, DSC, AFM and SEM) and corrosion testing (EIS and NSS). It is demonstrated that competition in the formation of siloxane and Si-O-Zr bonds takes place and can be controlled by the degree of hydrolysis and the concentration of the zirconium complex. This effect was found to dramatically alter the morphology of the coatings and their subsequent anticorrosion performances. At shortterm exposure times, it is found that the most condensed materials exhibited a higher corrosion resistance while over longer periods the performances were found to level. This article highlighted the critical impact of the hydrolysis degree and zirconium concentration on the connectivity of hybrid sol-gel coatings and the impact this has on corrosion performances.

show abstract

“…The fabricated coatings showed thicknesses of 4.5-5 µ, as determined using a non-ferrous thickness probe, an Elcometer 256. The purpose of spincoating in an alcohol saturated environment is to control the kinetic of evaporation of the solvents during the deposition process, thus obtaining high quality and homogeneous thin films, as previously described in another study by the authors [22]. For this purpose, the spin-coater was adapted to receive alcohol saturated nitrogen (N 2 ), which was produced by flowing N 2 through sealed flasks containing isopropanol.…”

Section: Preparation Of Sol-gel Coatingsmentioning

confidence: 99%

Correlation between the structure and the anticorrosion barrier properties of hybrid sol–gel coatings: application to the protection of AA2024-T3 alloys

Cullen

Morshed

O’Sullivan

et al. 2017

J Sol-Gel Sci Technol

Self Cite

View full text Add to dashboard Cite

Hybrid sol-gel materials have been extensively studied as viable alternatives to toxic chromate (VI)-based coatings for the corrosion protection of AA2024-T3 in the aerospace industry, due to the wide range of available chemistries they offer and the tremendous development potential of innovative functional coatings. However, so far, little work has been performed in identifying the effect of the employed chemistries on the structure and anticorrosion properties of the coatings. This work proposes to contribute to a better understanding of the relationship existing between the structure, morphology and anticorrosion properties of hybrid sol-gel coatings deposited on AA2024-T3 aluminium surfaces, the most widely used alloy in the aerospace industry. The sol-gels are prepared employing two hybrid precursors; an organosilane, 3-trimethoxysilylpropylmethacrylate, and a zirconium complex prepared from the chelation of zirconium n-propoxide, and methacrylic acid. The structure of the hybrid sol-gel formulation is modified by altering the concentration of the transition metal complex. The structure and morphology of the coatings are characterised by dynamic light scattering, fourier transform infrared spectroscopy, silicon nuclear magnetic resonance spectroscopy, differential scanning calorimetry, scanning electron microscopy, atomic-force microscopy and the anticorrosion barrier properties characterised by electrochemical impedance spectroscopy and neutral salt-spray. It is found that the transition metal concentration affected the morphology and structure, as well as the anticorrosion performances of the hybrid sol-gel coatings. A direct correlation between the morphology of the coatings and their final anticorrosion barrier properties is demonstrated, and the optimum material amongst this series is determined to be comprised of a concentration of between 20 and 30% of transition metal.

show abstract

Development and characterisation of integrated microfluidics on waveguide-based photonic platforms fabricated from hybrid materials

Cited by 6 publications

References 45 publications

Synthesis of Fast Curing, Water‐Resistant and Photopolymerizable Glass for Recording of Holographic Structures by One‐ and Two‐Photon Lithography

Synthesis of Fast Curing, Water‐Resistant and Photopolymerizable Glass for Recording of Holographic Structures by One‐ and Two‐Photon Lithography

The role of the hydrolysis and zirconium concentration on the structure and anticorrosion performances of a hybrid silicate sol-gel coating

Correlation between the structure and the anticorrosion barrier properties of hybrid sol–gel coatings: application to the protection of AA2024-T3 alloys

Contact Info

Product

Resources

About