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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Solvophobic-controlled synthesis of smart magneto-fluorescent nanostructures for real-time inspection of metallic fractures

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Author(s):
de Melo, Fernando Menegatti [1, 2] ; Mattioni, V, Joao ; Dias, Fernando [2] ; Fu, Ying [3] ; Toma, Henrique E. [4]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Chem, Supramol Nanotech Lab, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil
[2] Met Chek Brasil Ind & Comercio, Res & Dev Dept, Rua Ind 135, BR-12926674 Braganca Paulista, SP - Brazil
[3] Halmstad Univ, Sch Informat Technol, SE-30118 Halmstad - Sweden
[4] Mattioni, Joao, V, Univ Sao Paulo, Inst Chem, Supramol Nanotech Lab, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: NANOSCALE ADVANCES; v. 3, n. 12, p. 3593-3604, JUN 21 2021.
Web of Science Citations: 0
Abstract

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 (sigma(max) = 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. (AU)

FAPESP's process: 19/14771-5 - Development of superparamagnetic nanoparticles functionalized with complexing agents for the capture and exploitation of strategic metals
Grantee:João Victor Mattioni
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 18/21489-1 - Supramolecular nanotechnology: design, materials and devices
Grantee:Henrique Eisi Toma
Support Opportunities: Research Projects - Thematic Grants