Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties

Currently, highly luminescent colloidal upconversion nanoparticles (UCNPs) have expanded an increasing interest of researchers because of their facilitating lability in the biomedical/clinical field. In this study, NaYF4:Yb,Er UCNPs are prepared by eco-friendly metal complexation-based thermal decom...

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Autores principales:	Anees A. Ansari, Joselito P. Labis, Aslam Khan
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Upconversion nanoparticles Zeta potential Surface charge Optical properties Bandgap Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/7f353e3146944f31a54f18168717e2e2
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spelling	oai:doaj.org-article:7f353e3146944f31a54f18168717e2e22021-11-24T04:27:21ZBiocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties1319-610310.1016/j.jscs.2021.101390https://doaj.org/article/7f353e3146944f31a54f18168717e2e22021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1319610321001952https://doaj.org/toc/1319-6103Currently, highly luminescent colloidal upconversion nanoparticles (UCNPs) have expanded an increasing interest of researchers because of their facilitating lability in the biomedical/clinical field. In this study, NaYF4:Yb,Er UCNPs are prepared by eco-friendly metal complexation-based thermal decomposition method at a lower temperature in aqueous media. The phase structure, crystallinity, phase purity, morphology, colloidal dispersibility, surface structure, surface charge, and optical and luminescent properties were evaluated carefully by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive x-ray analysis (EDX), Thermogravimetric analysis (TGA), zeta potential, Fourier transform infrared (FTIR), UV/visible and photoluminescent spectroscopic techniques. XRD pattern shows a pure single-phase cubic structure with an average grain size of 30–35 nm. TEM and SEM micrographs exhibited irregularly shaped spherical morphologies, porous surface structures highly aggregated UCNPs with the narrow-size distribution. Positive zeta potential has shown value signifying high absorption in the visible region which indicates particle's good colloidal stability in aqueous media. Under NIR-laser light excitation, the UCNPs emit strong UC emission transitions in the visible region. A broad infrared absorption peak of hydroxyl groups (–OH) in FTIR spectrum and mass loss at a lower temperature in TGA verified the surface functionality of UCNPs, with high colloidal stability, and excellent biocompatibility in aqueous media. In terms of their surface characteristics and high luminescent properties, the NaYF4:Yb,Er UCNPs could be interestingly applied in tagging of biomolecules, drug delivery, proteins labeling, and therapeutic and thermostats applications.Anees A. AnsariJoselito P. LabisAslam KhanElsevierarticleUpconversion nanoparticlesZeta potentialSurface chargeOptical propertiesBandgapChemistryQD1-999ENJournal of Saudi Chemical Society, Vol 25, Iss 12, Pp 101390- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Upconversion nanoparticles Zeta potential Surface charge Optical properties Bandgap Chemistry QD1-999
spellingShingle	Upconversion nanoparticles Zeta potential Surface charge Optical properties Bandgap Chemistry QD1-999 Anees A. Ansari Joselito P. Labis Aslam Khan Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties
description	Currently, highly luminescent colloidal upconversion nanoparticles (UCNPs) have expanded an increasing interest of researchers because of their facilitating lability in the biomedical/clinical field. In this study, NaYF4:Yb,Er UCNPs are prepared by eco-friendly metal complexation-based thermal decomposition method at a lower temperature in aqueous media. The phase structure, crystallinity, phase purity, morphology, colloidal dispersibility, surface structure, surface charge, and optical and luminescent properties were evaluated carefully by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive x-ray analysis (EDX), Thermogravimetric analysis (TGA), zeta potential, Fourier transform infrared (FTIR), UV/visible and photoluminescent spectroscopic techniques. XRD pattern shows a pure single-phase cubic structure with an average grain size of 30–35 nm. TEM and SEM micrographs exhibited irregularly shaped spherical morphologies, porous surface structures highly aggregated UCNPs with the narrow-size distribution. Positive zeta potential has shown value signifying high absorption in the visible region which indicates particle's good colloidal stability in aqueous media. Under NIR-laser light excitation, the UCNPs emit strong UC emission transitions in the visible region. A broad infrared absorption peak of hydroxyl groups (–OH) in FTIR spectrum and mass loss at a lower temperature in TGA verified the surface functionality of UCNPs, with high colloidal stability, and excellent biocompatibility in aqueous media. In terms of their surface characteristics and high luminescent properties, the NaYF4:Yb,Er UCNPs could be interestingly applied in tagging of biomolecules, drug delivery, proteins labeling, and therapeutic and thermostats applications.
format	article
author	Anees A. Ansari Joselito P. Labis Aslam Khan
author_facet	Anees A. Ansari Joselito P. Labis Aslam Khan
author_sort	Anees A. Ansari
title	Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties
title_short	Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties
title_full	Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties
title_fullStr	Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties
title_full_unstemmed	Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties
title_sort	biocompatible nayf4:yb,er upconversion nanoparticles: colloidal stability and optical properties
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7f353e3146944f31a54f18168717e2e2
work_keys_str_mv	AT aneesaansari biocompatiblenayf4yberupconversionnanoparticlescolloidalstabilityandopticalproperties AT joselitoplabis biocompatiblenayf4yberupconversionnanoparticlescolloidalstabilityandopticalproperties AT aslamkhan biocompatiblenayf4yberupconversionnanoparticlescolloidalstabilityandopticalproperties
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Biocompatible NaYF4:Yb,Er upconversion nanoparticles: Colloidal stability and optical properties

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