Determination of the Size Distribution of Metallic Colloids from Extinction Spectroscopy

被引：6

作者：

Mansour, Yehia ^{[1
]}

Battie, Yann ^{[1
]}

En Naciri, Aotmane ^{[1
]}

Chaoui, Nouari ^{[1
]}

机构：

[1] Univ Lorraine, LCP A2MC, F-57000 Metz, France

来源：

NANOMATERIALS | 2021年 / 11卷 / 11期

关键词：

colloids; nanoparticle size distribution; extinction spectroscopy; Mie theory; ASPECT RATIO DISTRIBUTION; DYNAMIC LIGHT-SCATTERING; GOLD NANOPARTICLES; OPTICAL EXTINCTION; IN-SITU; NUCLEATION; GROWTH; SHAPE;

D O I：

10.3390/nano11112872

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, we explore the ability of extinction spectroscopy to characterize colloidal suspensions of gold nanoparticles (Au NPs). We demonstrate that the Au NPs' size distribution can be deduced by analyzing their extinction spectra using Mie theory. Our procedure, based on the non-negative least square algorithm, takes advantage of the high sensitivity of the plasmon band to the Au NP size. In addition, this procedure does not require any a priori information on the Au NP size distribution. The Au NPs' size distribution of monomodal or bimodal suspensions can be satisfactorily determined from their extinction spectra. Finally, we show that this characterization tool is compatible with in situ measurement and allows following the change in NPs' radii during laser exposure.

引用

页数：13

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