Structural, morphological and optical properties of Bi NPs obtained by laser ablation and their selective detection of L-cysteine

From a to k: increasing of cysteine concentration on a Bi nanoparticle colloid. [Display omitted] •Bi nanoparticles: production by laser ablation, structure and properties.•Bi nanoparticles colloid: interaction with amino acids.•Bi nanoparticles colloid and cysteine: study of fuctionalization.•Bi na...

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Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2014-09, Vol.457, p.368-373
Main Authors: Rosa, Ramon Gabriel Teixeira, de Araujo Duarte, Celso, Schreiner, Wido Herwig, Filho, Ney Pereira Mattoso, Bezerra, Arandi Ginane, Barison, Andersson, Ocampos, Fernanda Maria Marins
Format: Article
Language:English
Subjects:
Amino acids
Bismuth
Cysteine
Dimerization
Laser ablation
Light scattering
Nanoparticles
Surface chemistry
X-rays
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Summary:From a to k: increasing of cysteine concentration on a Bi nanoparticle colloid. [Display omitted] •Bi nanoparticles: production by laser ablation, structure and properties.•Bi nanoparticles colloid: interaction with amino acids.•Bi nanoparticles colloid and cysteine: study of fuctionalization.•Bi nanoparticles colloid as cysteine indicator. In the present work we show the results of the investigation of the properties of bismuth nanoparticles (NPs) obtained by the laser ablation in water. The samples were characterized by various techniques: UV/vis spectroscopy, dynamic light scattering, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, nuclear magnetic resonance and zeta potential. The NPs were metallic and surface oxidated, exhibiting absorption peak at 257 nm due to the surface plasmon resonance. The interaction between the NPs and various amino acids was studied and revealed a selective sensibility to cysteine on a range of concentration from 80 to 720 μM, which we attribute to a dimerization of cysteine to cystine probably complexed to the nanoparticle surface by electrostatic interactions, leading to the modification of the NP absorption spectrum.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2014.06.013