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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.)

Virucidal, photocatalytic and chiromagnetic cobalt oxide quantum dots

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Bronzato, Julia D. [1] ; Tofanello, Aryane [1] ; Oliveira, Martha T. [1] ; Bettini, Jefferson [2] ; Brito, Adrianne M. M. [1] ; Costa, Silgia A. [3] ; Costa, Sirlene M. [3] ; Lanfredi, Alexandre J. C. [4] ; Nascimento, Otaciro R. [5] ; Nantes-Cardoso, Iseli L. [1]
Total Authors: 10
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil
[2] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Nanotecnol, BR-13083970 Campinas, SP - Brazil
[3] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo - Brazil
[4] Univ Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Santo Andre, SP - Brazil
[5] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Applied Surface Science; v. 576, n. A FEB 1 2022.
Web of Science Citations: 0

Multifunctional quantum dots (QDs) of Co3O4 were fabricated using cobalt II nitrate hexahydrate with tomato (Solanum lycopersicum L.) seed extract and were efficiently applied as a virucidal additive in cotton fabric. The low-dimensional semiconductor, exhibiting a quantum confinement regime along with charge carrier confinement, resulted in superior antiviral characteristics. The QDs were characterized by UV-visible spectrophotometry, high-resolution transmission electron microscopy, X-ray excited photoelectron spectrometry, Fourier transform infrared spectroscopy, and magnetic properties using a superconductor quantum interference device. Co3O4 QDs exhibit chirality, as evidenced by the magnetic circular dichroism spectrum in the spectral region in which the material absorbs. The high ferritin content in tomato seeds, as evidenced by electron paramagnetic resonance, suggested that this protein acts as a nanocage for the growth of Co3O4. Commercially purified horse spleen ferritin was equally efficient in producing Co3O4 QDs. Based on these results, it can be concluded that the multifunctional platform of Co3O4 QDs satisfactorily meets the requirements to be an efficient photocatalyst and exhibits the potential to be employed as a semiconductor textile-based to combat/ to prevent coronavirus disease as a sustainable personal protective clothing. (AU)

FAPESP's process: 19/01425-1 - Synthesis and interaction of metal oxide nanostructures and topological insulating materials with biomolecules
Grantee:Julia Delatorre Bronzato
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties
Grantee:Adalberto Fazzio
Support type: Research Projects - Thematic Grants