Influence of the Capping Ligand on the Band Gap and Electronic Levels of PbS Nanoparticles through Surface Atomistic Arrangement Determination

García Gutiérrez, Diana Fabiola y Hernandez Casillas, Laura Patricia y Cappellari, Maria Victoria y Fungo, Fernando y Martínez Guerra, Edgar y García Gutiérrez, Domingo Ixcóatl (2018) Influence of the Capping Ligand on the Band Gap and Electronic Levels of PbS Nanoparticles through Surface Atomistic Arrangement Determination. ACS Omega, 3 (1). pp. 393-405. ISSN 2470-1343

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ABSTRACT: Lead sulfide (PbS) nanoparticles were synthesized by chemical methods with different sizes and different capping ligands (oleic acid, myristic acid, and hexanoic acid), avoiding ligand exchange procedures, to study the effect of characteristics of the capping ligands on their energy levels and band gap values. Experimental results (UV−vis−NIR, Fourier transform infrared, and Raman spectroscopies, cyclic voltammetry, transmission electron microscopy, and electron energy loss spectroscopy) showed a marked influence of the capping ligand nature on the electro-optical properties of PbS nanoparticles with a very similar size. Differences were observed in the atomistic arrangement on the nanoparticle surface and phonon vibrations with the different capping ligands. These observations suggest that the electrooptical properties of PbS nanoparticles are not only determined by their size, through quantum confinement effects, but also strongly affected by the atomistic arrangement on the nanoparticle surface, which is determined by the capping ligand nature.

Tipo de elemento: Article
Divisiones: Ingeniería Mecánica y Eléctrica
Usuario depositante: Lic. Josimar Pulido
Creadores:
CreadorEmailORCID
García Gutiérrez, Diana FabiolaNO ESPECIFICADONO ESPECIFICADO
Hernandez Casillas, Laura PatriciaNO ESPECIFICADONO ESPECIFICADO
Cappellari, Maria VictoriaNO ESPECIFICADONO ESPECIFICADO
Fungo, FernandoNO ESPECIFICADONO ESPECIFICADO
Martínez Guerra, EdgarNO ESPECIFICADONO ESPECIFICADO
García Gutiérrez, Domingo IxcóatlNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 30 Abr 2020 01:45
Última modificación: 13 Mayo 2020 16:57
URI: http://eprints.uanl.mx/id/eprint/17487

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