João V. Mattioni
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
João V. Mattioni has a total of 15 co-authors. Here are the top co-authors by number of shared publications:
- Henrique Eisi Toma
Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
4 shared publications - Fernando Menegatti de Melo
Universidade de São Paulo, Brazil
2 shared publications - Alceu Totti Silveira Junior
Universidade de São Paulo, Brazil
1 shared publication - Ataualpa Albert Carmo Braga
Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Avenida Professor Lineu Prestes, 748, São Paulo 05508-000, Brazil
1 shared publication - Douglas Santana Franciscato
Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
1 shared publication - Fernando Dias1 shared publication
Latest Publications
- 19 May 2025
- Published by Springer Nature in Plasmonics
- Vol. 20 (11) , 9501-9507
Plasmonics—Short Communication do Nanoparticles'Lability Influence Plasmonics and SERS?
- 19 May 2025
- Published by Springer Nature in Plasmonics
- Vol. 20 (11) , 9501-9507
Plasmonics—Short Communication do Nanoparticles'Lability Influence Plasmonics and SERS?
- Open Access
- 28 April 2021
- Published by Royal Society of Chemistry (RSC) in Nanoscale Advances
- Vol. 3 (12) , 3593-3604
Solvophobic-controlled synthesis of smart magneto-fluorescent nanostructures for real-time inspection of metallic fractures
The production of materials that contain more than one functional constituent, the so-called multifunctional materials, is quite relevant in advanced technology. By acting as building blocks, nanoparticles can be suitably explored for generating higher-order multifunctional structures. In this regard, herein, a special clustered magneto-fluorescent superstructure has been developed for non-destructive detection of flaws and shallow subsurface discontinuities in industrial ferromagnetic materials. The strategy consists of the solvophobic-controlled assembly of organic-based maghemite cores and water-based II–VI quantum dots, in the presence of hexadecyltrimethyl-ammonium bromide, CTAB, as a compatibilizer agent. This composite exhibited a high magnetic response (σmax = 66 emu g−1) and uniform size, in addition to tunable optical properties (QY = 78%). The strategy of utilizing nanoparticles as magneto-fluorescent nanoprobes to identify tiny slits represents a great advance, for improving the capability of precisely revealing the fracture boundary locations by visual real-time inspection. The nanoscale probes exhibit a low signal-to-noise ratio and a higher competitive performance in relation to the existing micrometric detection systems.
- 28 April 2021
- Published by Royal Society of Chemistry (RSC) in Nanoscale Advances
- Vol. 3 (12) , 3593-3604
Open AccessSolvophobic-controlled synthesis of smart magneto-fluorescent nanostructures for real-time inspection of metallic fractures
The production of materials that contain more than one functional constituent, the so-called multifunctional materials, is quite relevant in advanced technology. By acting as building blocks, nanoparticles can be suitably explored for generating higher-order multifunctional structures. In this regard, herein, a special clustered magneto-fluorescent superstructure has been developed for non-destructive detection of flaws and shallow subsurface discontinuities in industrial ferromagnetic materials. The strategy consists of the solvophobic-controlled assembly of organic-based maghemite cores and water-based II–VI quantum dots, in the presence of hexadecyltrimethyl-ammonium bromide, CTAB, as a compatibilizer agent. This composite exhibited a high magnetic response (σmax = 66 emu g−1) and uniform size, in addition to tunable optical properties (QY = 78%). The strategy of utilizing nanoparticles as magneto-fluorescent nanoprobes to identify tiny slits represents a great advance, for improving the capability of precisely revealing the fracture boundary locations by visual real-time inspection. The nanoscale probes exhibit a low signal-to-noise ratio and a higher competitive performance in relation to the existing micrometric detection systems.
- 12 March 2020
- Published by Wiley in Journal of Raman Spectroscopy
- Vol. 51 (7) , 1083-1091
Room temperature synthesis and Raman spectral evidence of carbon bond ranelate–gold nanoparticles
Ranelate ions, employed in the past as strontium salt for the treatment of osteoporosis, exhibit a rather interesting chemistry associated with a central thiophene ring encompassing two carboxylic groups, a cyanonitrile substituent, and a nitrile diacetate group. In spite of their unfavorable reduction potentials, around 1.26 V, they react very rapidly with HAuCl4 at room temperature, leading to decarboxylation at the C5 position in order to generate gold nanoparticles strongly stabilized by Au–C bonds. The reactions were elucidated by electrospray ionization mass spectrometry, ligand exchange kinetics, and by means of the surface‐enhanced Raman scattering effect. The gold nanoparticles were further characterized based on transmission electron microscopy and CytoViva hyperspectral microscopy.
- 12 March 2020
- Published by Wiley in Journal of Raman Spectroscopy
- Vol. 51 (7) , 1083-1091
Room temperature synthesis and Raman spectral evidence of carbon bond ranelate–gold nanoparticles
Ranelate ions, employed in the past as strontium salt for the treatment of osteoporosis, exhibit a rather interesting chemistry associated with a central thiophene ring encompassing two carboxylic groups, a cyanonitrile substituent, and a nitrile diacetate group. In spite of their unfavorable reduction potentials, around 1.26 V, they react very rapidly with HAuCl4 at room temperature, leading to decarboxylation at the C5 position in order to generate gold nanoparticles strongly stabilized by Au–C bonds. The reactions were elucidated by electrospray ionization mass spectrometry, ligand exchange kinetics, and by means of the surface‐enhanced Raman scattering effect. The gold nanoparticles were further characterized based on transmission electron microscopy and CytoViva hyperspectral microscopy.