Novel, Organically Doped, Sol-Gel-Derived Materials for Photonics: Multiphasic Nanostructured Composite Monoliths and Optical Fibers

Gvishi, Raz; Narang, Upvan; Ruland, Gary; Kumar, Deepak; Prasad, Paras N.

doi:10.1002/(sici)1099-0739(199702)11:2<107::aid-aoc565>3.0.co;2-j

Cited by 68 publications

(27 citation statements)

References 72 publications

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“…Inorganic glass based on silicon alkoxide possesses very high chemical and thermal stability, and benefits from good optical qualities. [35] However, inorganic glass may be fragile, and the sol-gel technique, which is most commonly used for preparation of doped inorganic glass, is often very time consuming (up to several months) and relies on condensation processes at low pH conditions which may deteriorate the properties and/or the structure of the guest molecule. [35][36][37] In comparison to inorganic glasses, organic glasses are more flexible and possess higher impact strength, but on the expense of a reduced thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…[35] However, inorganic glass may be fragile, and the sol-gel technique, which is most commonly used for preparation of doped inorganic glass, is often very time consuming (up to several months) and relies on condensation processes at low pH conditions which may deteriorate the properties and/or the structure of the guest molecule. [35][36][37] In comparison to inorganic glasses, organic glasses are more flexible and possess higher impact strength, but on the expense of a reduced thermal stability. [37][38][39] Organic glasses are readily accomplished within a few days and the polymerization may proceed under mild reaction conditions at moderate temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Nonlinear Absorbing Platinum(II) Acetylide Chromophores in Solid PMMA Matrices

Westlund

Malmström

Lopes

et al. 2008

Adv Funct Materials

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Platinum(II) acetylides were incorporated into poly(methyl methacrylate) (PMMA) glasses to obtain solid‐state nonlinear optical devices. We report on device fabrication, structural, chemical, and mechanical properties, as well as the optical limiting capabilities of the final solids. Two different guest‐host systems are presented: 1) Dye molecules functionalized to be readily dispersed in methyl methacrylate (MMA) and subsequent in situ polymerization of the MMA yielding solid PMMA host matrices. 2) Dye molecules functionalized to copolymerize with MMA forming covalent bonds between the guest and the PMMA host matrix. A range of doped organic solids were prepared, reaching concentrations up to 13 wt% of the guest molecule. Raman spectra of the doped solid devices indicate that the chemical structure of the nonlinear dyes remains intact upon the polymerization of the solid matrix. Luminescence spectra confirm that the basic photophysical properties observed for the same solute molecules in THF are maintained also in the solid state. Optical power limiting (OPL) characterization reveal clamping levels for the dyes nonbonded to the solid host being less than 4 µJ at pulse energies up to 110 µJ at 532 nm (f/5 arrangement and 5 ns pulses), which is comparable to the performance of similar dyes in THF solutions. In contrast, the highly crosslinked solid possesses a higher clamping level (8 µJ) at the same nominal concentration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Nonlinear Absorbing Platinum(II) Acetylide Chromophores in Solid PMMA Matrices

Westlund

Malmström

Lopes

et al. 2008

Adv Funct Materials

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“…(ii) It has been used for the extraction/complexation of cobalt (Havard 1975). (iii) It is a large molecule that can be entrapped securely inside the sol-gel pores.…”

Section: Data Treatmentmentioning

confidence: 99%

“…One of the most interesting advantages of these materials is their ability to combine the merits of inorganic glasses with the intrinsic properties of organic molecules (Gvishi et al 1997). The unique properties of organically doped sol-gel have led scientists to develop a number of sensors (Brennan et al 1999;Lev et al 1995;Malins et al 2000;Shi et al 1997).…”

Section: Introductionmentioning

confidence: 99%

A Novel Dye-Doped Sol–Gel Silica Sorbent for the Removal of Cobalt

Khan

Ahmed

Mahmood

et al. 2003

Adsorption Science & Technology

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ABSTRACT:A TAR [4-(2-thiazolylazo)resorcinol] doped sol-gel silica sorbent (red colour, porous, stable, hard, non-swelling) was prepared, characterized and investigated for the removal of Co(II) from aqueous solutions. The kinetics, adsorption isotherm, equilibration time and effect of pH on such removal were studied to optimize the conditions necessary for large-scale application. Rapid equilibration was observed with adsorption equilibria being attained within 10 min. The adsorption of cobalt ions onto the plain (undoped) sol-gel silica was negligible. The maximum adsorption of Co(II) ions onto the TAR-doped sol-gel silica from single solutions was 12.6 mmol/g. The TAR-doped sol-gel silica could be regenerated by washing with a 0.1 M HCl solution to give a maximum regeneration value as high as 98.5%. The TARdoped sol-gel silica could be used for more than three consecutive adsorption/desorption cycles without experiencing any considerable loss of adsorption capacity. The adsorption process and the nature of the Co-TAR complex were discussed.

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“…[1][2][3] Potential applications of materials derived from sol-gel processes range from mechanical stabilization [4] and interlayer dielectrics, [5] to catalysis [6][7][8] and photonics. [9,10] Typically, alkoxides of silanes [Si(OR) 4 , where R ¼ methyl, ethyl] are the primary precursor materials, although SiH 4 [11] and SiCl 3 [12] have also been used. The chemistry of silane alkoxides and related compounds is well understood.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Behavior of a Reacting Alkoxysilane Monolayer System

Carino

Duran

2004

Macro Chemistry & Physics

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Summary: We report here the results on the investigations of the dynamic interfacial behavior of a trifunctional alkoxysilane, octadecyltrimethoxysilane (OTMS) as it is reacting at the air‐water interface. We have investigated both the Π‐A isotherms and A(t) isobars of OTMS at acidic subphases. An attempt to analyze the kinetics of the reaction in the monolayer was limited to the early stages of the reactions and only describes the kinetics of hydrolysis. We also confirmed by rheological measurements that this system does indeed form a network inefficiently and the resulting structure most likely consists of extensive linear segments as has been suggested in earlier reports. The general rheological characteristic indicates the product to have high molecular weight. The product also exhibited a 2D sol‐gel transition that has general features of a percolating network. However, the scaling behavior does not follow exactly that predicted; several reasons for this are discussed.A(t) isobars of OTMS at various subphase pHmagnified imageA(t) isobars of OTMS at various subphase pH

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Novel, Organically Doped, Sol-Gel-Derived Materials for Photonics: Multiphasic Nanostructured Composite Monoliths and Optical Fibers

Cited by 68 publications

References 72 publications

Efficient Nonlinear Absorbing Platinum(II) Acetylide Chromophores in Solid PMMA Matrices

Efficient Nonlinear Absorbing Platinum(II) Acetylide Chromophores in Solid PMMA Matrices

A Novel Dye-Doped Sol–Gel Silica Sorbent for the Removal of Cobalt

Interfacial Behavior of a Reacting Alkoxysilane Monolayer System

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