Optical properties of silica MFI doped acrylamide-based photopolymer

Babeva, Tsvetanka; Todorov, R.; Mintova, Svetlana; Yovcheva, T.; Naydenova, Izabela; Toal, Vincent

doi:10.1088/1464-4258/11/2/024015

Cited by 22 publications

(25 citation statements)

References 33 publications

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“…Therefore, the possibility of filling the micropores of the AlPO-18 (3.8 Å) with guest molecules was investigated. The porosity of the AlPO-18 nanoparticles incorporated in the photopolymer layers was calculated according to the methods described 23 and compared with the experimental N 2 -sorption data (see Table 1). In order to determine the porosity of the nanoparticles, the refractive index of the AlPO-18 is required.…”

Section: Resultsmentioning

confidence: 99%

“…[21][22][23] The refractive index of the zeolite particles is close to that of the photopolymer, and the optical losses are quite low even in the case of relatively big nanoparticles (diameter of 100-300 nm). [23][24][25] Additional advantages of using zeolites as dopants are related to the possibility to control their chemical composition, pore shapes and sizes, hydrophilicity, hydrophobicity and overall particle size and morphology. 26 Understanding and predicting the influence of porosity and optical properties of microporous nanoparticles on the effective optical properties of the photopolymer layers will be beneficial for their applications, in particular in holographic sensor design.…”

Section: Introductionmentioning

confidence: 99%

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Optical Properties of Photopolymer Layers Doped with Aluminophosphate Nanocrystals

Leite

Babeva

et al. 2010

J. Phys. Chem. C

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The optical properties of photopolymer layers consisting of an acrylamide-based matrix and microporous aluminophosphate nanocrystals of AEI-type are investigated. The compatibility of the photopolymer doped with the nanoparticles is studied. The surface and volume properties of the layers with different levels of doping with microporous nanocrystals are characterized. The effective refractive indices and absorption coefficients of the doped photopolymer layers are determined and used to calculate the refractive index and porosity of pure AEI nanoparticles used as dopants. Volume transmission gratings were recorded in the doped photopolymer layers at different spatial frequencies.By spatial monitoring of the characteristic Raman peak of the AEI particles across the grating vector, the optimal concentrations of the nanocrystals for obtaining highest light induced redistribution of nanocrystals are determined. The optical properties of the photopolymer layers combined with the redistribution of the AEI nanoparticles during holographic recording are the parameters exploited for fabrication of optical sensors. An irreversible humidity sensor based on a transmission holographic grating is designed and fabricated. The diffraction efficiency of the sensor changes permanently after exposure to high humidity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical Properties of Photopolymer Layers Doped with Aluminophosphate Nanocrystals

Leite

Babeva

et al. 2010

J. Phys. Chem. C

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“…After recording the unslanted gratings and obtaining the angular selectivity profiles, the profiles of gratings recorded with slant angles of −10°, −5°, + 5° and + 10° were measured. These angles were slightly different in layers doped with silicalite-1 nanoparticles since inclusion of nanoparticles in the photopolymer, changes the average refractive index of the doped layer [16]. These changes were taken into account in analyzing the data.…”

Section: Holographic Recordingmentioning

confidence: 99%

“…The microporous nanoparticles can introduce relatively low scattering, higher diffraction efficiency and lower shrinkage [15]. The refractive index of layers doped with pure silicalite-1 nanoparticles was characterized and reported previously [16]. After holographic recording the Bragg selectivity curves of slanted holographic gratings were obtained and analyzed.…”

Section: Introductionmentioning

confidence: 99%

Nanozeolites doped photopolymer layers with reduced shrinkage

Moothanchery¹,

Naydenova²,

Mintova³

et al. 2011

Opt. Express

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An acrylamide based photopolymer doped with pure silica MFItype zeolite (silicalite-1) nanoparticles has been characterized for holographic recording purposes. The concentrations of the silicalite-1 nanoparticles in the photopolymer layers were 1, 2.5, 5 and 7.5 wt. %. The inclusion of silicalite-1 nanoparticle in the photopolymer has resulted in an increase of the diffraction efficiency by up to 40%, and decrease of the shrinkage from 1.32% to 0.57%. The best results were obtained in layers doped with 5 wt. % silicalite-1 nanoparticles.

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“…Pure silica MFI-type zeolite was synthesized through a procedure described in [27][28][29]. After completing the synthesis, the crystalline suspension was purified by highspeed centrifugation in three subsequent cycles and redispersed in water.…”

Section: Synthesis and Characterization Of The Mfi Zeolite Nanoparticlesmentioning

confidence: 99%

Birefringence improvement in azopolymer doped with MFI zeolite nanoparticles

Nazarova

Nedelchev

Mintova

2014

Optofluidics, Microfluidics and Nanofluidics

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Hybrid organic/inorganic materials based on combination of polymers and inorganic nanoparticles (NP) attract considerable attention due to their advantageous electrical, optical, or mechanical properties. Recently it was reported that doping photopolymers with nanoparticles allows to achieve near 100% net diffraction efficiency in case of conventional holographic recording. Thus, we have synthesized novel organic/inorganic composite materials by incorporating MFI (Mordenite Framework Inverted) type zeolite nanoparticles in an amorphous side-chain azopolymer. A considerable improvement of the photoresponse in thin films of these composite materials has been observed compared to the non-doped samples -nearly 25% increase of the saturated value of the birefringence. Moreover the photoinduced birefringence is stable in time which allows these materials to be used as media for diffractive optical elements with high efficiency and unique polarization properties.

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Optical properties of silica MFI doped acrylamide-based photopolymer

Cited by 22 publications

References 33 publications

Optical Properties of Photopolymer Layers Doped with Aluminophosphate Nanocrystals

Optical Properties of Photopolymer Layers Doped with Aluminophosphate Nanocrystals

Nanozeolites doped photopolymer layers with reduced shrinkage

Birefringence improvement in azopolymer doped with MFI zeolite nanoparticles

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