title: Quantum dots fluorescence quantum yield measured by Thermal Lens Spectroscopy.
abstract: An essential parameter to evaluate the light emission properties of fluorophores is the fluorescence quantum yield, which quantify the conversion efficiency of absorbed photons to emitted photons. We detail here an alternative nonfluorescent method to determine the absolute fluorescence quantum yield of quantum dots (QDs). The method is based in the so-called Thermal Lens Spectroscopy (TLS) technique, which consists on the evaluation of refractive index gradient thermally induced in the fluorescent material by the absorption of light. Aqueous dispersion carboxyl-coated cadmium telluride (CdTe) QDs samples were used to demonstrate the Thermal Lens Spectroscopy technical procedure.
authors.affiliation: Laboratory of Biomedical Optics and Imaging, Federal University of Pernambuco, Recife, PE, Brazil.
authors.forename: Carlos
authors.initials: C
authors.lastname: Estupiñán-López
authors.forename: Christian Tolentino
authors.initials: CT
authors.lastname: Dominguez
authors.forename: Paulo E
authors.initials: PE
authors.lastname: Cabral Filho
authors.forename: Adriana
authors.initials: A
authors.lastname: Fontes
authors.forename: Renato E
authors.initials: RE
authors.lastname: de Araujo
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D045663:Quantum Dots / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013691:Tellurium / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D013691:Tellurium; C028337:cadmium telluride