Direct Patterning, Conformal Coating, and Erbium Doping of Luminescent nc‐Si/SiO<sub>2</sub> Thin Films from Solution Processable Hydrogen Silsesquioxane

Hessel, Colin M.; Summers, Mark A.; Meldrum, A.; Malac, Marek; Veinot, Jonathan G. C.

doi:10.1002/adma.200700731

Cited by 41 publications

(34 citation statements)

References 21 publications

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“…One such POSS, hydrogen silsesquioxane (HSQ), has attracted increasing interest in scientific research and technological innovation. [19][20][21][22][23][24] A new kind of thermosetting resin with terminal propargyl groups has recently been developed as a high-performance polymer owing to its good processability, advantageous dielectric and mechanical properties and excellent thermal stability, whether in air or in a nitrogen atmosphere. [25][26][27][28][29][30] This paper presents new modified BMI resins prepared from BMI, HSQ and dipropargyl aryl ethers.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of bismaleimide resins modified with hydrogen silsesquioxane and dipropargyl ether and their composites

Huang

2010

Polym J

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A new type of modified bismaleimide (BMI) resins with good heat resistance and processing properties for advanced composites was developed. Modifiers hydrogen silsesquioxane (HSQ), dipropargyl ethers of bisphenol A, hexafluorobisphenol A, 4,4¢-dihydroxydiphenyl ether and resorcinol were used to modify 4,4¢-bismaleimidodiphenylmethane. The structure of the resins was verified by Fourier transform infrared spectrometry. The relationship between viscosity and temperature was used to characterize the processability of the resins. The curing behaviors of resins were investigated by a differential scanning calorimeter. The glass transition temperatures and thermal stabilities of cured resins were investigated by dynamic mechanical analysis and thermogravimetric analysis, respectively. The relationship between structures and properties of the resins was discussed, and the mechanical properties of the glass-fiber-fabric-reinforced composites were measured.

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Section: Introductionmentioning

confidence: 99%

Preparation and properties of bismaleimide resins modified with hydrogen silsesquioxane and dipropargyl ether and their composites

Huang

2010

Polym J

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“…This yielded a refractive index of n 2 = 1.67 in the wavelength range of the WGM in Figure 3 [6]. Some variation is possible in a curved film inside a capillary, owing to minor differences in the evolution of the HSQ film during annealing inside a capillary [21].…”

Section: Resultsmentioning

confidence: 99%

Refractometric Sensing of Heavy Oils in Fluorescent Core Microcapillaries

Zamora

Zhang

Meldrum

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Re´sume´-La de´tection re´fractome´trique des huiles lourdes dans les microcapillaires a`coeur fluorescents -La de´tection par re´fractome´trie d'huiles lourdes calibre´es (densite´> 1 000 kg/m 3 ) a e´te´de´montre´e à l'aide de micro-capillaires a`coeurs fluorescents. La surface interne d'un capillaire de 25 microns a d'abord e´te´reveˆtue d'une couche de silicium fluorescent a`haut indice de re´fraction (fluorescent silicon Quantum Dots, QD). Ce film de QD permet le de´veloppement de re´sonances cylindriques en mode galerie (Whispering Gallery Mode, WGM) à l'inte´rieur du capillaire. Les huiles lourdes recouvrant une gamme e´tendue de l'indice de re´fraction ont e´teí njecte´es dans le canal du capillaire, provoquant de grands changements pour les longueurs d'onde de re´sonance WGM. La sensibilite´des huiles lourdes aux indices de re´fraction les plus e´leve´s, est d'environ 250 nm par Unite´d'Indice de Re´fraction (nm/UIR), ce qui est la sensibilite´la plus e´leve´e observe´e jusqu'à pre´sent pour un capteur re´fractome´trique fonctionnant en mode fluorescent. Cela est une indication que les microcapillaires a`coeurs fluorescents pourraient eˆtre une alternative viable par microfluidique pour la de´tection chimique ou par re´fractome´trie lors des divers stades de la transformation, du controˆle et de l'utilisation du pe´trole et du gaz.Abstract -Refractometric Sensing of Heavy Oils in Fluorescent Core Microcapillaries -The refractometric sensing of calibrated heavy oils (density > 1 000 kg/m 3 ) is demonstrated using fluorescent-core microcapillaries. A 25-micron capillary channel was first coated with a high-index layer of fluorescent silicon Quantum Dots (QD). This QD film supports the development of cylindrical Whispering Gallery Mode (WGM) resonances inside the capillary. Heavy oils spanning a wide range of refractive index were pumped into the capillary channel, causing large shifts in the fluorescence WGM resonant wavelengths. The sensitivity for heavy oils approached 250 nm per Refractive Index Unit (nm/RIU) at the higher oil indices, which is the highest sensitivity so far observed for a refractometric sensor operating in the fluorescence mode. This suggests that fluorescent core microcapillaries may be a viable microfluidic alternative for refractometric or chemical sensing in various stages of oil and gas processing, monitoring and usage.

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“…Hydrogen silsesquioxane (HSQ) has already proven useful in this regard providing patterned thin film coatings of highly luminescent Si-NC/SiO 2 on various planar and non-planar substrates. 8 If practical solutionbased procedures are to be realized for other Group 14 materials, new processable precursors must be developed. In the present work, new sol-gel derived pre-polymers for preparation of Si-NC/SiO 2 , Ge-NC/GeO 2 and SiC/SiO 2 composites are described.…”

Section: Introductionmentioning

confidence: 99%

Sol-gel derived precursors to Group 14 semiconductor nanocrystals – Convenient materials for enabling nanocrystal-based applications

Veinot

Henderson

Hessel

2009

IOP Conf. Ser.: Mater. Sci. Eng.

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Direct Patterning, Conformal Coating, and Erbium Doping of Luminescent nc‐Si/SiO₂ Thin Films from Solution Processable Hydrogen Silsesquioxane

Cited by 41 publications

References 21 publications

Preparation and properties of bismaleimide resins modified with hydrogen silsesquioxane and dipropargyl ether and their composites

Preparation and properties of bismaleimide resins modified with hydrogen silsesquioxane and dipropargyl ether and their composites

Refractometric Sensing of Heavy Oils in Fluorescent Core Microcapillaries

Sol-gel derived precursors to Group 14 semiconductor nanocrystals – Convenient materials for enabling nanocrystal-based applications

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Direct Patterning, Conformal Coating, and Erbium Doping of Luminescent nc‐Si/SiO2 Thin Films from Solution Processable Hydrogen Silsesquioxane

Cited by 41 publications

References 21 publications

Preparation and properties of bismaleimide resins modified with hydrogen silsesquioxane and dipropargyl ether and their composites

Preparation and properties of bismaleimide resins modified with hydrogen silsesquioxane and dipropargyl ether and their composites

Refractometric Sensing of Heavy Oils in Fluorescent Core Microcapillaries

Sol-gel derived precursors to Group 14 semiconductor nanocrystals – Convenient materials for enabling nanocrystal-based applications

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Direct Patterning, Conformal Coating, and Erbium Doping of Luminescent nc‐Si/SiO₂ Thin Films from Solution Processable Hydrogen Silsesquioxane