title: Luminescence nanothermometry with alkyl-capped silicon nanoparticles dispersed in nonpolar liquids.
abstract: Silicon nanoparticles (Si NPs) with a diameter size ranging from 4 to 8 nm were successfully fabricated. They exhibit a visible photoluminescence (PL) due to the quantum confinement effect. Chemical functionalization of these Si NPs with alkyl groups allowed to homogeneously disperse them in nonpolar liquids (NPLs). In comparison to most of literature results for Si NPs, an important PL peak position variation with temperature (almost 1 meV/K) was obtained from 303 to 390 K. The influence of the liquid viscosity on the peak positions is also presented. These variations are discussed considering energy transfer between nanoparticles. The high PL thermal sensitivity of the alkyl-capped Si NPs paves the way for their future application as nanothermometers.
authors.affiliation: Université de Lyon, CNRS, UMR 5270, INSA-Lyon, INL, Villeurbanne 69621, France. hajjajihamza@gmail.com.
authors.forename: Hamza
authors.initials: H
authors.lastname: Hajjaji
authors.forename: Sergey
authors.initials: S
authors.lastname: Alekseev
authors.forename: Gérard
authors.initials: G
authors.lastname: Guillot
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Blanchard
authors.forename: Virginie
authors.initials: V
authors.lastname: Monnier
authors.forename: Yann
authors.initials: Y
authors.lastname: Chevolot
authors.forename: Georges
authors.initials: G
authors.lastname: Brémond
authors.forename: Michel
authors.initials: M
authors.lastname: Querry
authors.forename: David
authors.initials: D
authors.lastname: Philippon
authors.forename: Philippe
authors.initials: P
authors.lastname: Vergne
authors.forename: Jean Marie
authors.initials: JM
authors.lastname: Bluet