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一种模板法可在百纳米尺度精确合成SiO@FeO纳米颗粒。

A Template Method Leads to Precisely Synthesize SiO@FeO Nanoparticles at the Hundred-Nanometer Scale.

作者信息

Zhang Jinying, Wang Xinye, Yang Jiaxing, Zhang Yexiaotong

机构信息

Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.

Yangtze Delta Region Academy, Beijing Institute of Technology, Jiaxing 314001, China.

出版信息

Materials (Basel). 2024 Aug 31;17(17):4325. doi: 10.3390/ma17174325.

DOI:10.3390/ma17174325
PMID:39274723
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11395943/
Abstract

Constructing photonic crystals with core-shell structured nanoparticles is an important means for applications such as secure communication, anti-counterfeiting marking, and structural color camouflage. Nonetheless, the precise synthesis technology for core-shell structured nanoparticles at the hundred-nanometer scale faces significant challenges. This paper proposes a controlled synthesis method for core-shell structured nanoparticles using a template method. By using 100 nm diameter silica nanospheres as templates and coating them with a ferroferric oxide shell layer, SiO@FeO core-shell structured nanoparticles with regular morphology and good uniformity can be obtained. The study experimentally investigated the effects of feed amount, modifiers, temperature, and feed order on the coating effect, systematically optimizing the preparation process. Centrifugal driving technology was used to achieve structural colors in the visible wavelength range. Additionally, the method successfully created well-defined and uniform core-shell structured nanoparticles using 200 nm diameter silica nanospheres as templates, demonstrating that this controllable synthesis method can effectively produce core-shell structured nanoparticles over a wide range of particle sizes. The template method proposed in this paper can significantly improve morphological regularity and size uniformity while effectively reducing the preparation cost of core-shell structured nanoparticles.

摘要

利用核壳结构纳米粒子构建光子晶体是实现安全通信、防伪标记和结构色伪装等应用的重要手段。然而，精确合成百纳米尺度的核壳结构纳米粒子面临重大挑战。本文提出了一种利用模板法对核壳结构纳米粒子进行可控合成的方法。以直径100 nm的二氧化硅纳米球为模板，在其表面包覆一层四氧化三铁壳层，可得到形貌规则、均匀性良好的SiO@FeO核壳结构纳米粒子。该研究通过实验考察了进料量、改性剂、温度和进料顺序对包覆效果的影响，系统优化了制备工艺。采用离心驱动技术实现了可见波长范围内的结构色。此外，该方法以直径200 nm的二氧化硅纳米球为模板成功制备出了结构明确、均匀的核壳结构纳米粒子，表明这种可控合成方法能够在较宽的粒径范围内有效制备核壳结构纳米粒子。本文提出的模板法可显著提高形貌规则性和尺寸均匀性，同时有效降低核壳结构纳米粒子的制备成本。

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Study on the transmission characteristics and band structure of 2D and 3D plasma photonic crystals.二维和三维等离子体光子晶体的传输特性和能带结构研究。
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