金纳米壳中局部表面等离子体共振的微调

IF 2.6 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Nanoparticle Research Pub Date : 2025-10-18 DOI:10.1007/s11051-025-06478-w

María Y. Paredes, Alberto F. Scarpettini

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引用次数: 0

摘要

高质量的二氧化硅核和金壳球形纳米颗粒的合成具有精确控制其尺寸和明确定义的等离子共振。研究结果表明，在合适的还原剂和优化的反应条件下，同时合成和吸附小金种子在官能化SiO2球上，是金种子生长和聚结成均匀封闭层的关键。这一改进使得生产的核壳纳米结构的消光光谱与Mie理论的预测非常吻合。图形抽象

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Fine-tuning of localized surface plasmon resonances in gold nanoshells

High-quality silica core and gold shell spherical nanoparticles were synthesized with precise control over their dimensions and well-defined plasmonic resonances. We demonstrate that the simultaneous synthesis and adsorption of small gold seeds onto functionalized SiO₂ spheres, combined with a suitable reducing agent and optimized reaction conditions, are crucial for the growth and coalescence of the gold seeds into uniform and closed layers. This improvement enables the production of core–shell nanostructures whose extinction spectra exhibit excellent agreement with predictions from Mie theory.

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来源期刊

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

期刊介绍： The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.