Effect of hydrochloric acid on the synthesis of gold nanoantennas and their morphological and optical properties

Vitaly A. Khanadeev; Andrey V. Simonenko; Boris N. Khlebtsov; Alexander S. Fomin; Nikolai G. Khlebtsov

doi:10.1117/12.2624380

29 April 2022 Effect of hydrochloric acid on the synthesis of gold nanoantennas and their morphological and optical properties

Vitaly A. Khanadeev, Andrey V. Simonenko, Boris N. Khlebtsov, Alexander S. Fomin, Nikolai G. Khlebtsov

Author Affiliations +

Proceedings Volume 12194, Computational Biophysics and Nanobiophotonics; 121940W (2022) https://doi.org/10.1117/12.2624380
Event: XXV Annual Conference Saratov Fall Meeting 2021; and IX Symposium on Optics and Biophotonics, 2021, Saratov, Russian Federation

Abstract

Gold nanoantennas are a new type of nanostars with long spikes and small cores and the ability to adjust localized surface plasmon resonance in the range from 600 to 1600 nm by changing the shape and size of nanoparticles. In this work, the morphometric and optical properties of gold nanoantennas are investigated depending on the concentration of gold seeds and hydrochloric acid. Transmission electron microscopy (TEM) reveals a decrease in the spike length and the core diameter of nanoantennas under an increase in the seed concentration. The reaction rate decreases after the addition of hydrochloric acid. With a minimal addition of hydrochloric acid, the length of the spikes increases. However, with an increase in the hydrochloric acid concentration, the length of the spikes decreases. Increasing the concentration of both seeds and hydrochloric acid leads to a shift of the plasmon resonance towards shorter wavelengths. The cell viability test showed negligible in vitro citotoxicity of nanoantennas for two cell lines.

Citation Download Citation

Vitaly A. Khanadeev, Andrey V. Simonenko, Boris N. Khlebtsov, Alexander S. Fomin, and Nikolai G. Khlebtsov "Effect of hydrochloric acid on the synthesis of gold nanoantennas and their morphological and optical properties", Proc. SPIE 12194, Computational Biophysics and Nanobiophotonics, 121940W (29 April 2022); https://doi.org/10.1117/12.2624380

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