Počet záznamů: 1
Controlled tuning of the size of Ag-hydrosol nanoparticles by nonstabilized THF and detection of peroxides in THF
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SYSNO ASEP 0507023 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Controlled tuning of the size of Ag-hydrosol nanoparticles by nonstabilized THF and detection of peroxides in THF Tvůrce(i) Šloufová, I. (CZ)
Šlouf, Miroslav (UMCH-V) RID, ORCID
Vlčková, B. (CZ)
Gajdošová, Veronika (UMCH-V) RID, ORCID
Zedník, J. (CZ)
Vohlídal, J. (CZ)Zdroj.dok. Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 35, č. 30 (2019), s. 9831-9840Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Ag nanoparticles ; THF induced changes ; nanoparticle morphology Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GA17-05007S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000479019700023 EID SCOPUS 85070537165 DOI 10.1021/acs.langmuir.9b01449 Anotace Surface plasmon extinction (SPE) spectra of plasmonic nanoparticles (NPs) are sensitive indicators of their composition, size, shape, interparticle interactions, and of the dielectric constant of their ambient. In this study, rapid changes in SPE spectra of Ag NPs suggesting variations in NP size and concentration were detected after addition of aged tetrahydrofuran (THF). Using time-dependent UV/vis spectroscopy combined with factor analysis, transmission electron microscopy imaging, selected-area electron diffraction, and energy-dispersive X-ray analysis, we observed that an over-limit amount of aged THF fully dissolved Ag NPs with no plasmon recovery. By contrast, an under-limit amount led to incomplete dissolution of Ag NPs and, after reaching the turnover point, to spontaneous recrystallization on residual Ag nuclei, as demonstrated by the SPE band intensity recovery to the original or even higher values. The newly formed Ag NPs were isometric, and their diameter was dependent on the added amount of THF. Furthermore, both Ag NP dissolution and recrystallization were caused by THF peroxides and their reduction products. Therefore, the dissolution of Ag NPs and the resulting hydrosol bleaching may be used as an indicator of the presence of peroxides in THF. Moreover, the reaction of aged THF with Ag NPs can be employed as a tool for tuning the size of Ag NPs in hydrosols. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2020 Elektronická adresa https://pubs.acs.org/doi/10.1021/acs.langmuir.9b01449
Počet záznamů: 1