Colloidal solution of luminescent ZnO quantum dots embedded silica as nano-tracers for remote sensing applications

Yamani, Zain H.; Al-Jabari, Mohammed H.; Khan, Safyan Akram; Ali, Shahid; Kanj, Mazen Y.; Kosynkin, Dmitry V.; Morsy, Mohamed A.

doi:10.1016/j.molliq.2018.11.001

Cited by 9 publications

(2 citation statements)

References 39 publications

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“…Finally, the colloid was dispersed in water. Zain et al 78 also used TEOS for the synthesis of ZnO QD-embedded silica nanoparticles. They found 55% to 80% luminescence emission at 100 °C temperature and 40 g L −1 salinity.…”

Section: Synthetic Approachmentioning

confidence: 99%

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Singh

2021

RSC Adv.

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Section: Synthetic Approachmentioning

confidence: 99%

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Singh

2021

RSC Adv.

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“…The synthesis of silica NPs was carried out by the modified Stöber's method using silane precursors [29,30]. In a typical synthesis, CTAB surfactant (2.0 g, 5.48 mmol) was dissolved in deionized water (25 mL) under vigorous stirring and transferred into a roundbottom flask containing a solution of NaOH (1.40 g, 35 mmol) and deionized water (100 mL).…”

Section: Synthesis Of Silica Nanoparticles (Nh 2 @Sio 2 Nps)mentioning

confidence: 99%

Cost-Effective and Selective Fluorescent Chemosensor (Pyr-NH@SiO2 NPs) for Mercury Detection in Seawater

et al. 2022

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The release of mercury into the environment has adverse effects on humans and aquatic species, even at very low concentrations. Pyrene and its derivatives have interesting fluorescence properties that can be utilized for mercury (Hg2+) ion sensing. Herein, we reported the highly selective pyrene-functionalized silica nanoparticles (Pyr-NH@SiO2 NPs) for chemosensing mercury (Hg2+) ions in a seawater sample. The Pyr-NH@SiO2 NPs were synthesized via a two-step protocol. First, a modified Stöber method was adopted to generate amino-functionalized silica nanoparticles (NH2@SiO2 NPs). Second, 1-pyrenecarboxylic acid was coupled to NH2@SiO2 NPs using a peptide coupling reaction. As-synthesized NH2@SiO2 NPs and Pyr-NH@SiO2 NPs were thoroughly investigated by 1H-NMR, FTIR, XRD, FESEM, EDS, TGA, and BET surface area analysis. The fluorescent properties were examined in deionized water under UV-light illumination. Finally, the developed Pyr-NH@SiO2 NPs were tested as a chemosensor for Hg2+ ions detection in a broad concentration range (0–50 ppm) via photoluminescence (PL) spectroscopy. The chemosensor can selectively detect Hg2+ ions in the presence of ubiquitous ions (Na+, K+, Ca2+, Mg2+, Ba2+, Ag+, and seawater samples). The quenching of fluorescence properties with Hg2+ ions (LOD: 10 ppb) indicates that Pyr-NH@SiO2 NPs can be effectively utilized as a promising chemosensor for mercury ion detection in seawater environments.

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Design of Multi‐Luminescent Silica‐Based Nanoparticles for the Detection of Liquid Organic Compounds

Delic,

Lindgren,

Psarrou

et al. 2024

Chemistry A European J

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Tracer testing in reservoir formations is utilised to determine residual oil saturation as part of optimum hydrocarbon production. Here, we present a novel detection method of liquid organic compounds by monodisperse SiO2 nanoparticles (NPs) containing two luminophores, a EuIII:EDTA complex and a newly synthesised fluorophore based on the organic boron‐dipyrromethene (BODIPY)‐moiety. The particles exhibited stable EuIII PL emission intensity with a long lifetime in aqueous dispersion. The fluorescence of the BODIPY was also preserved in the aqueous environment. The ratiometric PL detection technique was demonstrated by using toluene and 1‐octanol as model compounds of crude oil. The optimal synthesis conditions were found to give NPs with a diameter of ~ 100 nm, which is suitable for transport through porous oil reservoir structures. The cytotoxicity of the NPs was confirmed to be very low for human lung cell and fish cell lines. These findings demonstrate the potential of the NPs to replace the hazardous chemicals used to estimate the residual oil saturation. Moreover, the ratiometric PL detection technique is anticipated to be of benefit in other fields, such as biotechnology, medical diagnostics, and environmental monitoring, where a reliable and safe detection of a liquid organic phase is needed.

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Colloidal solution of luminescent ZnO quantum dots embedded silica as nano-tracers for remote sensing applications

Cited by 9 publications

References 39 publications

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Cost-Effective and Selective Fluorescent Chemosensor (Pyr-NH@SiO2 NPs) for Mercury Detection in Seawater

Design of Multi‐Luminescent Silica‐Based Nanoparticles for the Detection of Liquid Organic Compounds

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