Refractive index investigations of nanoparticles dispersed in water

Bodurov, I; Yovcheva, T.; Sainov, S.

doi:10.1088/1742-6596/558/1/012062

Cited by 19 publications

(13 citation statements)

References 7 publications

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“…ZrO 2 is transparent from UV to mid-infrared, and has high refractive index (2.1 to 2.3) in the visible. [49] Regarding the obtained refractive indexes for our materials (measured on films), treated under UV light to simulate the photon excitation, the values are consistent with expectations. The materials prepared without the particles present a refractive index of 1.6 as prepared, which increased to 2.0 after annealing at 1000 °C.…”

Section: Diffractive Optical Nanostructures With High Refractive Index and Resistant Zrosupporting

confidence: 86%

3D Printing and Pyrolysis of Optical ZrO₂ Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

Desponds

Bányász

Château

et al. 2021

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is key for many industries such as microelectronics, telecommunications, defense, microfluidics but also for biological applications. The techniques for making such objects are diverse, but traditionally based on linear patterning that involves the use of molds or masks. [1] Electron beam lithography (EBL) is mainly used for prototyping or making molds for replications.Innovative processes for the direct 3D fabrication of sample with a complex shape at a sub-microscale are nowadays required. For the past 20 years, a manufacturing technique was developed, multiphotonic lithography, also called direct laser writing (DLW). [2] Direct laser writing can have very fast speeds (hundreds of m s -1 ) for writing 2D structures on functional surfaces. This work has objectives to contribute to develop a massive parallelization process with millions of laser spots. Thus, direct laser writing could be used directly for the 3D nanostructuration of functional surfaces, in particular on detector windows (antifogging), CMOS wafers, biological surfaces. This technique, similar to some extent to stereolithography, allows the preparation of solid materials from liquid photosensitive resins by laser-induced photopolymerization. The polymerization isThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202102486.

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Section: Diffractive Optical Nanostructures With High Refractive Index and Resistant Zrosupporting

confidence: 86%

3D Printing and Pyrolysis of Optical ZrO₂ Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

Desponds

Bányász

Château

et al. 2021

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“…Scattering data were calculated using a discretized form of Equation ( 2) and databases with discrete step sizes for each particle fraction (d ∈ [1 nm, 2000 nm], R g ∈ [0.5 nm, 1000 nm]). Scattering for spherical particles was calculated using Mie theory following [27,36], assuming refractive indices of 1.000 for the surrounding gas atmosphere in the spray flame and 2.540 for TiO 2 -nanoparticles [37] and vertical polarized light at a wavelength of 532 nm. For fractal aggregates, scattering data were calculated using the confluent hypergeometric function 1 F 1 , based on the Rayleigh-Debye-Gans theory for fractal aggregates (RDG-FA) [15,22].…”

Section: Evaluation Of Scattering From Nanoparticlesmentioning

confidence: 99%

In Situ Determination of Droplet and Nanoparticle Size Distributions in Spray Flame Synthesis by Wide-Angle Light Scattering (WALS)

et al. 2021

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The investigation of droplet and nanoparticle formation in spray flame synthesis requires sophisticated measurement techniques, as often both are present simultaneously. Here, wide-angle light scattering (WALS) was applied to determine droplet and nanoparticle size distributions in spray flames from a standardized liquid-fed burner setup. Solvents of pure ethanol and a mixture of ethanol and titanium isopropoxide, incepting nanoparticle synthesis, were investigated. A novel method for the evaluation of scattering data from droplets between 2 µm and 50 µm was successfully implemented. Applying this, we could reveal the development of a bimodal droplet size distribution for the solvent/precursor system, probably induced by droplet micro-explosions. To determine nanoparticle size distributions, an appropriate filter and the averaging of single-shot data were applied to ensure scattering from a significant amount of nanoparticles homogeneously distributed in the measurement volume. From the multivariate analysis of the scattering data, the presence of spherical particles and fractal aggregates was derived, which was confirmed by analysis of transmission electron microscopy images. Monte Carlo simulations allowed determining the distribution parameters for both morphological fractions in three heights above the burner. The results showed relatively wide size distributions, especially for the spherical fraction, and indicated an ongoing sintering, from fractal to spherical particles.

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“…The advantages include easy experimental implementation and simple calibration [18]. The criticalangle method is precise to about ±0.002 refractive index units.…”

Section: A C C E P T E D Mmentioning

confidence: 99%

Determining the complex refractive index of cellulose nanocrystals by combination of Beer-Lambert and immersion matching methods

Niskanen

Suopajärvi

Fabritius

et al. 2019

Journal of Quantitative Spectroscopy and Radiative Transfer

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights Determination of complex refractive index of CNCs as a function of wavelength  The data analysis is based on Beer-Lambert and immersion liquid method equations  The refractive indexes of CNCs are considerably lower than original cellulose  The method is independent of the shape or size of a particle  The accuracy of the refractive index was better than ±0.005 refractive index units

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Refractive index investigations of nanoparticles dispersed in water

Cited by 19 publications

References 7 publications

3D Printing and Pyrolysis of Optical ZrO₂ Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

3D Printing and Pyrolysis of Optical ZrO₂ Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

In Situ Determination of Droplet and Nanoparticle Size Distributions in Spray Flame Synthesis by Wide-Angle Light Scattering (WALS)

Determining the complex refractive index of cellulose nanocrystals by combination of Beer-Lambert and immersion matching methods

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Refractive index investigations of nanoparticles dispersed in water

Cited by 19 publications

References 7 publications

3D Printing and Pyrolysis of Optical ZrO2 Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

3D Printing and Pyrolysis of Optical ZrO2 Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

In Situ Determination of Droplet and Nanoparticle Size Distributions in Spray Flame Synthesis by Wide-Angle Light Scattering (WALS)

Determining the complex refractive index of cellulose nanocrystals by combination of Beer-Lambert and immersion matching methods

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3D Printing and Pyrolysis of Optical ZrO₂ Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds

3D Printing and Pyrolysis of Optical ZrO₂ Nanostructures by Two‐Photon Lithography: Reduced Shrinkage and Crystallization Mediated by Nanoparticles Seeds