How porosity affects the emission of fluorescent carbon dot-silica porous composites

Carbonaro, Carlo Maria;Thakkar, Swapneel Vijay;Ludmerczki, Róbert;Olla, Chiara;Pinna, Andrea;Loche, Danilo;Malfatti, Luca;Cesare Marincola, Flaminia;Casula, Maria Francesca
2020

Abstract

Blue-emitting nitrogen-doped carbon dots (CDN) produced by a solvent-free method have been successfully incorporated into silica (SiO2) through a sol-gel procedure. By exploiting the co-gelation of the dispersed carbon dots and of the silica matrix, homogeneous distribution of the carbon dots was obtained throughout the matrix. The CDN-SiO2 composites in the form of xero-, cryo-, and aerogels featuring different porous textures were produced by exploiting different gel drying strategies. The most critical parameters and the material features associated to the different synthesis were investigated by transmission electron microscopy, thermal analysis, Mid-infrared spectroscopy, N-2 physisorption isotherms and time-resolved spectrofluorimetry. The emissive properties of CDN-SiO2 composites in the form of aero-, cryo- and xerogel were studied. The spectral properties and the efficiency of the emission change in the CDN-SiO2 composites pointed at the effect of CD loading and porous texture of xerogels. Our investigation expands the exploitation of functional carbon dots through the production of fluorescent solid-state composites with tunable porosities.
eng
305
110302
10
Esperti anonimi
internazionale
Scientifica
Carbon dot; Aerogel; Composite; Cryogel; Photoluminescence
si
Carbonaro, Carlo Maria; Thakkar, Swapneel Vijay; Ludmerczki, Róbert; Olla, Chiara; Pinna, Andrea; Loche, Danilo; Malfatti, Luca; Cesare Marincola, Flaminia; Casula, Maria Francesca
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
9
reserved
Files in This Item:
File Size Format  
1-s2.0-S138718112030305X-main (1).pdf

non disponibili

Description: https://doi.org/10.1016/j.micromeso.2020.110302
Type: versione editoriale
Size 2.78 MB
Format Adobe PDF
2.78 MB Adobe PDF   Visualizza/Apri   Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Questionnaire and social

Share on:
Impostazioni cookie