Silver Crown Particles with Multiwalled Carbon Nanotubes Skeletons

IF 0.8 Q3 Engineering Nanotechnologies in Russia Pub Date : 2024-08-06 DOI:10.1134/S2635167624600238

V. A. Vagapov, O. A. Vasilenko, A. V. Golubev, O. V. Demicheva, N. A. Karapuzova

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Abstract

The types of metal-composite particles produced as a result of the chemical silvering of DEALTOM multiwalled carbon nanotubes (MWCNTs) dispersed in a solution are studied. A silver polycrystalline coating of the surface of MWCNTs is obtained by the adsorption method. A new property is discovered, namely the fusion of silver-plated nanotubes obtained in this way into crown particles and the ability to agglomerate into various macrostructures. Studying the Dealtom metallized MWCNT structure by means of the scanning electron microscope reveals the following types of metallization in the samples: lamellar silver crystals (0.1–3 μm) on few and single active centers of the MWCNT surface; a silver polycrystalline layer on the surface of the MWCNTs; a polycrystalline coating of each MWCNT in a coil of nanotubes with subsequent fusion into a single silver crown particle (1–10 μm); hybrid particles, which are lamellar crystals of silver on the polycrystalline silver surface of the crown particle; the fusion of two or more crown particles into a 1D chain and 2D carpet macrostructures. The synthesized hybrid particles with nanobranched pointed morphology are promising for use in surface-enhanced Raman scattering (SERS) spectroscopy for determining ultra-low concentrations of substances as well as for analyzing biological objects.

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具有多壁碳纳米管骨架的银冠颗粒

摘要研究了对分散在溶液中的 DEALTOM 多壁碳纳米管（MWCNTs）进行化学银化而产生的金属复合颗粒的类型。通过吸附法在 MWCNT 表面获得了多晶银涂层。研究发现了一种新特性，即通过这种方法获得的镀银纳米管可融合成冠状颗粒，并能聚结成各种宏观结构。通过扫描电子显微镜研究 Dealtom 金属化 MWCNT 结构，可以发现样品中的金属化类型如下：片状银晶体（0.1-3 μm）；MWCNT 表面的银多晶层；纳米管线圈中每个 MWCNT 的多晶涂层，随后融合成单个银冠颗粒（1-10 μm）；混合颗粒，即在冠颗粒的多晶银表面形成片状银晶体；两个或多个冠颗粒融合成 1D 链和 2D 地毯状宏观结构。合成的杂化颗粒具有纳米带状尖头形态，有望用于表面增强拉曼散射（SERS）光谱，以确定超低浓度的物质以及分析生物物体。

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来源期刊

Nanotechnologies in Russia NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

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.