Subglobular Structure of Photonic Crystal Nanospheres Grown Based on Amorphous Silica at Different Water/TEOS Molar Ratios in the Initial Mixtures

IF 0.8 Q3 Engineering Nanotechnologies in Russia Pub Date : 2024-09-10 DOI:10.1134/S2635167624600858

I. I. Yurasova, N. I. Yurasov, A. A. Veligzhanin, G. S. Peters, D. R. Strel’tsov, N. K. Galkin, A. N. Zakharov

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Abstract

Photonic crystals obtained by the modified Stöber method with the natural sedimentation of nanospheres is investigated. The surfaces of the silica nanospheres are investigated using atomic-force microscopy. The surfaces of all samples have a cauliflower structure. The structure of the photonic crystals is studied by the method of small-angle synchrotron radiation scattering (SASRS). The SASRS curves exhibit two or three regions with different scattering intensities. Three original techniques for analyzing the data obtained are proposed. Periodicity in the dependence of the logarithm of intensity on the scattering vector at the smallest wavenumbers, related to scattering from nanospheres, is found. The influence of the water/TEOS molar ratio on the size and concentration of these particles is revealed. Particles of two types (nanospheres and subglobules) are observed at low water concentrations (6–8 mol/L), whereas at water concentrations of 13–23 mol/L the particles are of three types (nanospheres, subglobules, and grains). The morphology of the detected particles is estimated.

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初始混合物中水/TEOS 摩尔比不同时基于无定形二氧化硅生长的光子晶体纳米球的亚球状结构

摘要研究了利用纳米球自然沉降的改良斯托伯法获得的光子晶体。使用原子力显微镜对二氧化硅纳米球的表面进行了研究。所有样品的表面都具有菜花状结构。利用小角同步辐射散射（SASRS）方法研究了光子晶体的结构。SASRS 曲线显示出两个或三个具有不同散射强度的区域。本文提出了分析所获数据的三种独创技术。发现在最小波数处，强度对数对散射矢量的依赖具有周期性，这与纳米球的散射有关。揭示了水/TEOS 摩尔比对这些颗粒的大小和浓度的影响。在水的低浓度（6-8 摩尔/升）条件下，可观察到两种类型的颗粒（纳米球和亚球体），而在水的浓度为 13-23 摩尔/升条件下，则可观察到三种类型的颗粒（纳米球、亚球体和颗粒）。对检测到的颗粒形态进行了估计。

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来源期刊

Nanotechnologies in Russia NANOSCIENCE & NANOTECHNOLOGY-

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1.20

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0.00%

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期刊介绍： Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.