New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species

We have studied the products of the controversial synthesis of HAuCl4 with Na2S, which include gold nanostructures (Au NSs) that absorb in the near-infrared (NIR) region and are highly promising for photothermal therapies and other nanomedical applications. From high-resolution transmission electron...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Huergo, María Ana C., Giovanetti, Lisandro José, Moreno, Mario Sergio Jesus, Maier, C. M., Requejo, Félix Gregorio, Salvarezza, Roberto Carlos, Vericat, Carolina
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2017
Materias:
Química
Gold nanotriangles
NIR
Sulfur species
Nanomedicine
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/101519
https://ri.conicet.gov.ar/11336/57987
http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b01168
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-101519
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Gold nanotriangles
NIR
Sulfur species
Nanomedicine
spellingShingle Química
Gold nanotriangles
NIR
Sulfur species
Nanomedicine
Huergo, María Ana C.
Giovanetti, Lisandro José
Moreno, Mario Sergio Jesus
Maier, C. M.
Requejo, Félix Gregorio
Salvarezza, Roberto Carlos
Vericat, Carolina
New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species
topic_facet Química
Gold nanotriangles
NIR
Sulfur species
Nanomedicine
description We have studied the products of the controversial synthesis of HAuCl4 with Na2S, which include gold nanostructures (Au NSs) that absorb in the near-infrared (NIR) region and are highly promising for photothermal therapies and other nanomedical applications. From high-resolution transmission electron microscopy, X-ray absorption spectroscopy, and small-angle X-ray scattering, we have found that only metallic Au NSs are formed as a result of this synthesis, with no detectable amount of gold sulfide or other oxidized gold species that could account for the NIR absorption. Different sulfur species are adsorbed on the Au NSs, mainly sulfides (monomeric sulfur) and polysulfides, similar to what is found on the planar gold surfaces, therefore precluding the idea that thiosulfate or other oxidized species are the actual reducing agents for Au(III) ions. The presence of strongly adsorbed S species, which are difficult to remove from the gold surface, is of great importance for their applications as regards toxicity and use of postfunctionalization strategies to anchor biomolecules and/or to increase circulation time after administration.
format Articulo
Preprint
author Huergo, María Ana C.
Giovanetti, Lisandro José
Moreno, Mario Sergio Jesus
Maier, C. M.
Requejo, Félix Gregorio
Salvarezza, Roberto Carlos
Vericat, Carolina
author_facet Huergo, María Ana C.
Giovanetti, Lisandro José
Moreno, Mario Sergio Jesus
Maier, C. M.
Requejo, Félix Gregorio
Salvarezza, Roberto Carlos
Vericat, Carolina
author_sort Huergo, María Ana C.
title New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species
title_short New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species
title_full New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species
title_fullStr New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species
title_full_unstemmed New insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of Au(III) with sulfide species
title_sort new insight into the chemical nature of the plasmonic nanostructures synthesized by the reduction of au(iii) with sulfide species
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/101519
https://ri.conicet.gov.ar/11336/57987
http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b01168
work_keys_str_mv AT huergomariaanac newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
AT giovanettilisandrojose newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
AT morenomariosergiojesus newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
AT maiercm newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
AT requejofelixgregorio newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
AT salvarezzarobertocarlos newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
AT vericatcarolina newinsightintothechemicalnatureoftheplasmonicnanostructuressynthesizedbythereductionofauiiiwithsulfidespecies
bdutipo_str Repositorios
_version_ 1764820442586021890

Ejemplares similares