Geodesic
Analysis of the effect of pH on the stability and optical spectra of Au nanoparticles linked by conductive BPE molecule
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 17 (2024) no. 6, pp. 754-760

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The preparation of detergent-free gold NPs by the citrate method is shown. The procedure of functionalization of monomeric Au NPs with 1,2-bis(2-pyridyl)ethylene (termed BPE) molecule to obtain Au-BPE dimers is described. According to the results of TEM analysis, the shape of the obtained NPs is close to spherical with a diameter of 21.94 $\pm$ 0.28 nm. In dimers, the distance between NPs is controlled by the linker and is 0.75 $\pm$ 0.12 nm, which is in agreement with the dimensions of the BPE molecule. According to the results of Experimental absorption UV-Vis spectra, measured over time, in 0.15 M nitric acid solution, Au-BPE dimers are more stable than in an alkali solution of the same molarity. Long-term exposure leads to a decrease in the intensity of the LSP peak of the dimers.
Keywords: citrate method, 1,2-bis(2-pyridyl)ethylene.
Mots-clés : Au nanoparticles, UV-Vis spectra 
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     author = {Anna V. Lukyanenko and Andrey V. Tsarenko and Aleksandr S. Aleksandrovsky and Alexaander S. Fedorov and Amina Sh. Umarova},
     title = {Analysis of the effect of {pH} on the stability and optical spectra of {Au} nanoparticles linked by conductive {BPE} molecule},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
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     url = {http://geodesic.mathdoc.fr/item/JSFU_2024_17_6_a6/}
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%A Andrey V. Tsarenko
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%A Alexaander S. Fedorov
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Anna V. Lukyanenko; Andrey V. Tsarenko; Aleksandr S. Aleksandrovsky; Alexaander S. Fedorov; Amina Sh. Umarova. Analysis of the effect of pH on the stability and optical spectra of Au nanoparticles linked by conductive BPE molecule. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 17 (2024) no. 6, pp. 754-760. http://geodesic.mathdoc.fr/item/JSFU_2024_17_6_a6/