RT Journal Article
T1 10-Fold Quantum Yield Improvement of Ag2S Nanoparticles by Fine Compositional Tuning.
A1 Ortega-Rodríguez, Alicia
A1 Shen, Yingli
A1 Zabala-Gutiérrez, Irene
A1 Santos, Harrison D.A.
A1 Torres-Vera, Vivian
A1 Ximendes, Erving
A1 Villaverde, Gonzalo
A1 Lifante, José
A1 Gerke, Christoph
A1 Fernández, Nuria
A1 Calderón, Oscar G.
A1 Melle, Sonia
A1 Marques-Hueso, José
A1 Méndez-González, Diego
A1 Laurenti, Marco
A1 Jones, Callum M. S.
A1 López-Romero, Juan Manuel
A1 Contreras-Cáceres, Rafael
A1 Jaque, Daniel
A1 Rubio Retama, Jorge
K1 Nanopartículas
K1 Sulfuros
K1 Síntesis (Química)
K1 Fluorescencia
K1 Imágenes espectroscópicas
AB Ag2S semiconductor nanoparticles (NPs) are near-infrared luminescentprobes with outstanding properties (good biocompatibility, optimum spectral operationrange, and easy biofunctionalization) that make them ideal probes for in vivo imaging.Ag2S NPs have, indeed, made possible amazing challenges including in vivo brain imagingand advanced diagnosis of the cardiovascular system. Despite the continuous redesign ofsynthesis routes, the emission quantum yield (QY) of Ag2S NPs is typically below 0.2%.This leads to a low luminescent brightness that avoids their translation into the clinics. Inthis work, an innovative synthetic methodology that permits a 10-fold increment in theabsolute QY from 0.2 up to 2.3% is presented. Such an increment in the QY isaccompanied by an enlargement of photoluminescence lifetimes from 184 to 1200 ns. Theoptimized synthetic route presented here is based on a fine control over both the Ag coreand the Ag/S ratio within the NPs. Such control reduces the density of structural defectsand decreases the nonradiative pathways. In addition, we demonstrate that the superiorperformance of the Ag2S NPs allows for high-contrast in vivo bioimaging.
PB ACS
YR 2020
FD 2020-02-18
LK https://hdl.handle.net/10630/40541
UL https://hdl.handle.net/10630/40541
LA eng
NO ACS Appl. Mater. Interfaces 2020, 12, 12500−12509
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026