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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Seeded Growth Synthesis of Uniform Gold Nanoparticles with Diameters of 15-300 nm
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Seeded Growth Synthesis of Uniform Gold Nanoparticles with Diameters of 15-300 nm

机译：直径为15-300 nm的均匀金纳米粒子的种子生长合成

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摘要

In this work, we present a simple seeded growth approach to obtain gold nanoparticles over a large range of sizes. The method produces particles with uniform spherical shape and narrow size distributions. Using ascorbic acid as a reductant and sodium citrate as stabilizer we utilize biocompatible and easy to exchange substances. The investigation of the growth process via TEM measurements revealed the formation of small gold clusters on the surface of the seeds, which subsequently grow and result in a "blackberry-like" intermediate shape of the gold nanoparticles. Applying heat caused an intraparticle ripen- ing process, which finally lead to a smooth spherical particle shape. Furthermore, the optical properties of the resulting gold sols are discussed in the light of Mie theory and an influence of the polydispersity was found for large particles.
机译：在这项工作中，我们提出了一种简单的种子生长方法，以获得大范围尺寸的金纳米颗粒。该方法产生具有均匀球形形状和狭窄尺寸分布的颗粒。使用抗坏血酸作为还原剂和柠檬酸钠作为稳定剂，我们利用了生物相容性强且易于交换的物质。通过TEM测量对生长过程的研究表明，在种子表面上形成了小的金簇，这些簇随后生长并形成金纳米颗粒的“黑莓状”中间形状。加热会导致颗粒内部成熟，最终导致形成光滑的球形颗粒形状。此外，根据米氏理论讨论了所得金溶胶的光学性质，并且发现了大颗粒的多分散性的影响。

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