Gabriella TessitoreConcordia University Montreal · Department of Chemistry and Biochemistry
Gabriella Tessitore
Dr.
About
16
Publications
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181
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Citations since 2016
Introduction
Additional affiliations
August 2018 - July 2020
May 2018 - June 2018
October 2017 - April 2018
Publications
Publications (16)
Dye sensitization is a promising route to enhance luminescence from lanthanide-doped upconverting nanoparticles (LnUCNPs) by improving the photon harvesting capability of LnUCNPs through the use of dye molecules, characterized by higher absorption coefficients. The literature does not fully address the poor photostability of NIR dyes, hindering sol...
In recent decades, there has been a drive towards developing luminescent probes for optical microscopy and biological assays to overcome the obstacles presented by traditional small-molecule probes, which are susceptible to photodegradation. Lanthanide-doped nanoparticles are a unique and versatile alternative to these probes; they can be excited w...
Evaluation of particle dynamics at the nano- and microscale poses a challenge to the development of novel velocimetry techniques. Established optical methods implement external or internal calibrations of the emission profiles by varying the particle velocity and are limited to specific experimental conditions. The proposed multiemission particle v...
In article number 2002266, John A. Capobianco and co‐workers present the novel multiemission particle velocimetry technique, which exploits the upconversion luminescence dynamics in core–shell nanoparticles engineered with different emitting ions. Their sequential emissions are characterized by a known time interval, resulting in the possibility of...
Sub-10 nm β-NaGdF4:18% Yb³⁺,2% Er³⁺ nanoparticles were synthesized in ethylene glycol and various ionic liquids under microwave heating. The products were characterized by powder X-ray diffraction, electron microscopy, and upconversion (UC) luminescence spectroscopy. After Yb³⁺ excitation at 970 nm, Er³⁺ ions are excited by energy transfer upconver...
To maximize the intrinsic luminescence efficiency of the higher energy emissions of Tm³⁺ in LiYF4: Yb³⁺, Tm³⁺ upconverting nanoparticles, we investigated a specific range of Tm³⁺ dopant concentrations. Reported to be optimized at 25% Yb³⁺, 0.5% Tm³⁺, due to the multitude of Tm³⁺-to-Tm³⁺ interactions, the Tm³⁺ concentration commonly used may not be...
Aufkonvertierende Nanopartikel Zeitlich abstimmbare Emissionen auf Basis von Tm3+‐ und Tb3+‐Ionen wurden von J. A. Capobianco et al. im Forschungsartikel auf S. 9844 ff. genutzt. Die Emissionen lassen sich mithilfe einer handelsüblichen Kamera beobachten.
Upconversion Nanoparticles Time‐tunable emissions based on Tm3+ and Tb3+ ions are exploited by J. A. Capobianco and co‐workers in their Research Article on page 9742 ff. They show that time‐tunable emissions can be observed by using a commercially available camera.
Color‐tunable luminescence has been extensively investigated in upconverting nanoparticles for diverse applications, each exploiting emissions in different spectral regions. Manipulation of the emission wavelength is accomplished by varying the composition of the luminescent material or the characteristics of the excitation source. Here we propose...
Color‐tunable luminescence has been extensively investigated in upconverting nanoparticles for diverse applications, each exploiting emissions in different spectral regions. Manipulation of the emission wavelength is accomplished by varying the composition of the luminescent material or the characteristics of the excitation source. Here we propose...
The development of reliable and reproducible synthetic routes that produce monodisperse lanthanide-doped upconverting nanoparticles has resulted in an appreciable need to determine the mechanisms which govern upconversion luminescence at the nanoscale. New experimental and theoretical evidence explicates the quenching phenomena involved in the low...
Phase pure hexagonal β-NaGdF4: Eu³⁺, Er³⁺ samples of less than 10 nm in crystallite size were synthesized in anhydous ethylene glycol within 24 hours at room temperature. The materials were characterized by powder X-ray diffraction, electron microscopy, and luminescence spectroscopy. After Gd³⁺ excitation at 273 nm Eu³⁺ luminescence from the ⁵DJ st...
A room temperature synthesis was developed for phase pure β-NaGdF4 nanocrystallites as well as 5, 10, and 20% Eu³⁺ or 5% Er³⁺ doped material. Rare earth acetates and NaCl react in a 1:2 M ratio with a variable excess of NH4F in ethylene glycol within 24 hours. Since the thermodynamic stability of the hexagonal phase decreases along the lanthanide s...
Soot inception in flames remains mostly unknown. What are, if any, the differences between inception particles formed in non-sooting and sooting flames, and to what extent soot formation is governed primarily by coagulation or by a different composition/aromatization of inception particles are open questions.
In this work, the initial particle grow...
The effect of ethanol addition in ethylene laminar premixed flames on the characteristics of soot precursor nanoparticles was investigated by aerosol photoionization technique. The fifth harmonic of a Nd:YAG laser, 213 nm (5.82 eV), was used as ionization source, while a differential mobility analyzer (DMA) coupled to a Faraday cup electrometer was...
Projects
Projects (2)
http://luminet.chem.uni.wroc.pl
- New syntheses of luminescent nanopowders, nanocomposites and hybrid materials through alternative techniques (microwave dielectric heating, ionic liquids-mediated syntheses);
- Characterization of luminescent materials with respect to their phase (Powder XRD), size (microscopy: TEM and SEM), and luminescence (spectroscopic techniques: absorption, photoluminescence, upconversion luminescence spectroscopy);
- Crytical comparison with literature data and optimization of the materials in respect to their size and luminescence.
