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. 2025 Dec 26;16:2414. doi: 10.1038/s41598-025-32204-6

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© The Author(s) 2025

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Fig. 2 — A(a) UV-Visible absorption spectra of five synthesized samples compared to the sample synthesized in the presence of CIT salt, A(b) Absorption wavelength shift corresponding to the increase in nanoparticle size in optimized formulation 2 and Au-CIT, B(a) Five formulation at initial - Temperature: 5 °C ± 3 °C, B(b) Synthesized samples after 6 months of long-term stability- Temperature: 5 °C ± 3 °C.