Mn-Doped Quinary Ag-In-Ga-Zn-S Quantum Dots for Dual-Modal Imaging
Galiyeva P. Rinnert H. Bouguet-Bonnet S. Leclerc S. Balan L. Alem H. Blanchard S. Jasniewski J. Medjahdi G. Uralbekov B. Schneider R.
7 December 2021American Chemical Society
ACS Omega
2021#6Issue 4833100 - 33110 pp.
Doping of transition metals within a semiconductor quantum dot (QD) has a high impact on the optical and magnetic properties of the QD. In this study, we report the synthesis of Mn2+-doped Ag-In-Ga-Zn-S (Mn:AIGZS) QDs via thermolysis of a dithiocarbamate complex of Ag+, In3+, Ga3+, and Zn2+ and of Mn(stearate)2 in oleylamine. The influence of the Mn2+ loading on the photoluminescence (PL) and magnetic properties of the dots are investigated. Mn:AIGZS QDs exhibit a diameter of ca. 2 nm, a high PL quantum yield (up to 41.3% for a 2.5% doping in Mn2+), and robust photo- and colloidal stabilities. The optical properties of Mn:AIGZS QDs are preserved upon transfer into water using the glutathione tetramethylammonium ligand. At the same time, Mn:AIGZS QDs exhibit high relaxivity (r1 = 0.15 mM-1 s-1 and r2 = 0.57 mM-1 s-1 at 298 K and 2.34 T), which shows their potential applicability for bimodal PL/magnetic resonance imaging (MRI) probes.
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Université de Lorraine, CNRS, LRGP, Nancy, F-54000, France
Université de Lorraine, CNRS, IJL, Nancy, F-54000, France
Université de Lorraine, CNRS, CRM2, Nancy, F-54000, France
Université de Lorraine, CNRS, LEMTA, Nancy, F-54000, France
CEMHTI-UPR 3079 CNRS, Site Haute Tempérapture, 1D Avenue de la Recherche Scientifique, Orléans, 45071, France
Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, Paris, F-75005, France
Université de Lorraine, LIBio, Nancy, F-54000, France
Center of Physical-Chemical Methods of Research and Analysis, Al-Farabi Kazakh National University, Al-Farabi Avenue, 71, Almaty, 050040, Kazakhstan
LLP EcoRadSM, Al-Farabi Avenue, 71, Almaty, 050040, Kazakhstan
Laboratoire Réactions et Génie des Procédés, Université de Lorraine, Nancy, 54000, France
Université de Lorraine
Université de Lorraine
Université de Lorraine
Université de Lorraine
CEMHTI-UPR 3079 CNRS
Sorbonne Université
Université de Lorraine
Center of Physical-Chemical Methods of Research and Analysis
LLP EcoRadSM
Laboratoire Réactions et Génie des Procédés
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