Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

CdSe quantum dots as fluorescent nanomarkers for diesel oil

2018; Elsevier BV; Volume: 239; Linguagem: Inglês

10.1016/j.fuel.2018.11.043

1873-7153

Aquiles Silva do Nascimento, Paulo E. Cabral Filho, Adriana Fontes, Beate S. Santos, Florival Rodrigues de Carvalho, Luiz Stragevitch, Elisa Soares Leite,

Gold and Silver Nanoparticles Synthesis and Applications

Markers are regularly used to detect fraud and adulteration in fuel as well as to track products in a distribution chain. Herein, we tested the use of CdSe semiconductor fluorescent nanocrystals, quantum dots, as a new class of fuel markers. Quantum dots show bright fluorescence and they can be excited by light sources covering a broad spectral range, from ultraviolet up to the near infrared region. This class of markers presents great advantages over conventional ones, such as high detectability potential, fluorescence emission in multicolor wavelengths, high photostability, and easy preparation procedures. In this work, we prepared CdSe quantum dots by colloidal controlled growth in an organic medium to be used for evaluation of diesel oil. The detection method was either by electronic absorption or fluorescence spectroscopies. The nanomarkers could be detected down to 1 mg/kg level in diesel fuel. The overall results indicated that CdSe quantum dots have the potential for use as a new class of fuel nanomarkers.