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Multimetallic nanostructures with hollow interiors and well-defined sizes, shapes and compositions

Grant number: 11/06847-0
Support type:Regular Research Grants
Duration: October 01, 2011 - September 30, 2013
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Pedro Henrique Cury Camargo
Grantee:Pedro Henrique Cury Camargo
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

This proposal focuses on the development of multimetallic nanostructures with hollow interiors displaying well-defined and controllable size, shape and composition. In particular, we are interested in the synthesis of nanoshells and nanotubes composed of silver-gold (Ag-Au), silver-palladium (Ag-Pd), and silver-platinum (Ag-Pt) for applications in plasmonics and catalysis. In the first part of this work, the synthesis and characterization of Ag nanostructures with well-defined sizes and shapes will be addressed. Specifically, we will focus on: i) nanospheres with diameters in the 40-60 nm range; and ii) nanowires d 100 nm in width and > 3 ¼m in length. In the second stage of this project, the Ag nanospheres and nanowires will be employed as sacrificial templates in the galvanic replacement reaction with ions AuCl4-, PdCl42-, or PtCl62- in order to produce the corresponding Ag-Au, Ag-Pd and Ag-Pt hollow nanostructures (nanoshells or nanotubes). In the last stage of this proposal, the Ag-Au nanomaterials will be employed as substrates for the SERS detection of different classes of environmentally important species. Meanwhile, the Ag-Au, Ag-Pd e Ag-Pt nanostructures will be applied in catalysis. As the galvanic replacement reaction enables one to fine-tune the composition (by controlling the molar ratio between Ag and the metal ion precursor during the reaction) and also to obtain hollow interiors (that provide higher surface areas as compared to their solid counterparts), the strategies proposed herein represent a simple, versatile and promising alternative to produce a wealth of nanomaterials with controlled properties for plasmonics and catalysis applications. (AU)

Scientific publications (10)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SLATER, THOMAS J. A.; MACEDO, ALEXANDRA; SCHROEDER, SVEN L. M.; BURKE, M. GRACE; O'BRIEN, PAUL; CAMARGO, PEDRO H. C.; HAIGH, SARAH J. Correlating Catalytic Activity of Ag-Au Nanoparticles with 3D Compositional Variations. Nano Letters, v. 14, n. 4, p. 1921-1926, APR 2014. Web of Science Citations: 76.
CARDOSO, MARIANA B. T.; LEWIS, EDWARD; CASTRO, POLLYANA S.; DANTAS, LUIZA M. F.; DE OLIVEIRA, CAIO C. S.; BERTOTTI, MAURO; HAIGH, SARAH J.; CAMARGO, PEDRO H. C. A Facile Strategy to Support Palladium Nanoparticles on Carbon Nanotubes, Employing Polyvinylpyrrolidone as a Surface Modifier. European Journal of Inorganic Chemistry, v. 2014, n. 9, p. 1439-1445, MAR 2014. Web of Science Citations: 7.
KISUKURI, CAMILA M.; MACEDO, ALEXANDRA; OLIVEIRA, CAIO C. S.; CAMARGO, PEDRO H. C.; ANDRADE, LEANDRO H. Investigating the Influence of the Interface in Thiol-Functionalized Silver-Gold Nanoshells over Lipase Activity. Langmuir, v. 29, n. 51, p. 15974-15980, DEC 24 2013. Web of Science Citations: 5.
NOBREGA, MARCELO M.; SOUZA, KLESTER S.; ANDRADE, GUSTAVO F. S.; CAMARGO, PEDRO H. C.; TEMPERINI, MARCIA L. A. Emeraldine Salt Form of Polyaniline as a Probe Molecule for Surface Enhanced Raman Scattering Substrates Excited at 1064 nm. Journal of Physical Chemistry C, v. 117, n. 35, p. 18199-18205, SEP 5 2013. Web of Science Citations: 13.
DAMATO, TATIANA C.; DE OLIVEIRA, CAIO C. S.; ANDO, ROMULO A.; CAMARGO, PEDRO H. C. A Facile Approach to TiO2 Colloidal Spheres Decorated with Au Nanoparticles Displaying Well-Defined Sizes and Uniform Dispersion. Langmuir, v. 29, n. 5, p. 1642-1649, FEB 5 2013. Web of Science Citations: 60.
DE OLIVEIRA, CAIO C. S.; ANDO, ROMULO A.; CAMARGO, PEDRO H. C. Size-controlled synthesis of silver micro/nanowires as enabled by HCL oxidative etching. Physical Chemistry Chemical Physics, v. 15, n. 6, p. 1887-1893, 2013. Web of Science Citations: 11.
ALVES, TIAGO V.; HERMOSO, WILLIAN; ORNELLAS, FERNANDO R.; CAMARGO, PEDRO H. C. On the optical properties of copper nanocubes as a function of the edge length as modeled by the discrete dipole approximation. Chemical Physics Letters, v. 544, p. 64-69, AUG 20 2012. Web of Science Citations: 14.
HERMOSO, W.; ALVES, T. V.; ORNELLAS, F. R.; CAMARGO, P. H. C. Comparative study on the far-field spectra and near-field amplitudes for silver and gold nanocubes irradiated at 514, 633 and 785 nm as a function of the edge length. EUROPEAN PHYSICAL JOURNAL D, v. 66, n. 5 MAY 2012. Web of Science Citations: 17.
COSTA, JEAN C. S.; CORIO, PAOLA; CAMARGO, PEDRO H. C. Silver-gold nanotubes containing hot spots on their surface: facile synthesis and surface-enhanced Raman scattering investigations. RSC ADVANCES, v. 2, n. 26, p. 9801-9804, 2012. Web of Science Citations: 16.
PETRI, MARCOS V.; ANDO, ROMULO A.; CAMARGO, PEDRO H. C. Tailoring the structure, composition, optical properties and catalytic activity of Ag-Au nanoparticles by the galvanic replacement reaction. Chemical Physics Letters, v. 531, p. 188-192, 2012. Web of Science Citations: 35.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.