用简单的离心法对低纵横比金纳米棒进行形状选择纯化

IF 2.2 4区 工程技术 Q2 Chemistry Gold Bulletin Pub Date : 2017-01-27 DOI:10.1007/s13404-017-0197-9
Maxime Boksebeld, Nicholas P. Blanchard, Ali Jaffal, Yann Chevolot, Virginie Monnier
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引用次数: 11

摘要

本工作提出了一种新的、简单的方法,用于从棒和球的混合物中选择形状纯化金纳米棒。先前报道的方法耗时长,并且存在收率低和难以回收纯化的纳米颗粒等缺点。此外,它们主要应用于高纵横比(AR)纳米棒。我们的工艺是基于简单和短暂的离心步骤,以沉淀特定的金纳米球。选择含有低AR纳米棒(AR?<?6)的样品进行纯化过程。每一步离心后,用紫外-可见吸收光谱法测定上清液的含量。然后,透射电子显微镜(TEM)通过对1000多个纳米颗粒进行形状分析,提高了提取的纯化效率。这些结果表明,我们的离心工艺成功地应用于三种尺寸的纳米棒(2.4、3.7和5.3)。在AR = 3.7纳米棒和AR = 5.3纳米棒的条件下,分别获得了72%和78%的纯化率。
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Shape-selective purification of gold nanorods with low aspect ratio using a simple centrifugation method

This work presents a new and simple procedure for the shape selective purification of gold nanorods from a mixture of rods and spheres. Previously reported methods were time-consuming and revealed several drawbacks such as low yields and difficulty to recover the purified nanoparticles. Additionally, they were mostly applied to high aspect ratio (AR) nanorods. Our process is based on only simple and short centrifugation steps in order to precipitate specifically gold nanospheres. Samples containing low AR nanorods (AR?<?6) were selected to perform the purification process. The supernatant content was followed by UV-Visible absorption spectroscopy after each centrifugation step. Then, transmission electron microscopy (TEM) allowed extract the purification efficiency thanks to shape analyses performed on more than 1000 nanoparticles. These results showed that our centrifugation process was applied successfully to three sizes of nanorods (2.4, 3.7, and 5.3). High purification yields of 72 and 78% were attained for AR?=?3.7 and AR?=?5.3 nanorods, respectively.

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来源期刊
Gold Bulletin
Gold Bulletin 工程技术-材料科学:综合
CiteScore
3.30
自引率
4.50%
发文量
0
审稿时长
3 months
期刊介绍: Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.
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