Retrieval of Size Distribution and Concentration of Au-Ag Alloy Nanospheroids by Spectral Extinction Method.

Yuxia Zheng, Paerhatijiang Tuersun, Remilai Abulaiti, Dengpan Ma, Long Cheng

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Article in Materials (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Yuxia ZhengKey Laboratory of Mineral Optical Functional Materials and Application, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.

Paerhatijiang TuersunKey Laboratory of Mineral Optical Functional Materials and Application, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.

Remilai AbulaitiKey Laboratory of Mineral Optical Functional Materials and Application, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.

Dengpan MaKey Laboratory of Mineral Optical Functional Materials and Application, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.

Long ChengKey Laboratory of Mineral Optical Functional Materials and Application, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.

Funding

Natural Science Foundation of Xinjiang Uygur Autonomous Region 2021D01A116Research Fund of Xinjiang Normal University Research Platform Student Project KWFG2003

6 · The paper itself

Abstract

In order to monitor the synthesis processes or characterize nanoparticles for application, a new method that allows in situ determination of the two-dimensional size distribution and concentration of Au-Ag alloy nanospheroids, based on their extinction spectrum, is developed. Non-negative Tikhonov regularization and T-matrix method were used to solve the inverse problem. The effects of the two-dimensional size steps, wavelength range, and measurement errors of extinction spectrum on the retrieval results were analyzed to verify the feasibility and accuracy of the retrieval algorithm. Through comparative analysis, the size steps and wavelength range that make the retrieval error smaller are found. After adding 0.1% random noise to the extinction spectrum, a small variation in the retrieval error of the mean size is observed. The results showed that the error of the mean size is smaller than 2% and the error of the concentration is smaller than 3%. This method is simple, fast, cheap, nondestructive, and can be done in situ during the growth process of nanoparticles.

Indexed as

composite nanoparticlesinverse problemlocalized surface plasmon resonancespectral extinction methodTikhonov regularizationT-matrix

Identifiers

PMID35269008

DOI10.3390/ma15051778

PMCPMC8911737

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