%0 Journal Article %1 WOS:000540282500026 %A Gusmao, Suziete B S %A Ghosh, Anupama %A Marques, Thalles M F %A Gusmao, Gustavo O M %A Oliveira, Tainara G %A Cavalcante, Luis Carlos D %A Vasconcelos, Thiago L %A Abreu, Guilherme J P %A Guerra, Yuset %A Pena-Garcia, R %A Santos, Francisco Eroni P %A Viana, Bartolomeu C %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND %D 2020 %I PERGAMON-ELSEVIER SCIENCE LTD %J JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS %K Ion Iron; Magnetic exchange; nano-heterostructure; properties} {Titanate %R 10.1016/j.jpcs.2020.109561 %T Structural and magnetic properties of titanate nano-heterostructures decorated with iron based nanoparticles %V 145 %X Titanate nano-heterostructures have been prepared by a microwave-assisted hydrothermal method and then modified by replacing the Na+ ions present in the outer walls of the nanotubes (NT) by Fe3+ ions. The structural and magnetic properties of the product have been investigated in detail. It was observed that the titanate nanostructures are decorated with anatase (An) nanoparticles of size ca. 2 nm, producing TiNT@AnNP nanoheterostructures and that substitution with Fe3+ generates beta-FeOOH and alpha-Fe2O3 phases, furnishing FeTiNT@AnNP. HAADF-STEM analysis revealed a complex nano-heterostructure with nanoparticles of beta-FeOOH of size ca. 5 nm in the interlayer spaces and nanoparticles of alpha-Fe2O3 of size ca. 10-12 nm on the outer walls. Magnetic measurements at 300 K showed a ferromagnetic contribution in combination with a paramagnetic component for both the pristine and ion-exchanged samples. To the best of our knowledge, such iron-exchanged TiNT nano-heterostructures with alpha-Fe2O3 and beta-FeOOH phases have not been reported previously. The key feature of this work is that ion-exchange of titanate nanotubes with iron ions generates a complex nanoheterostructure, the optical and magnetic properties of which are systematically modified. As titanate nanotubes and their derivatives are well known for their low toxicity and good biocompatibility, the additional magnetic behavior shown by the nanostructures reported here may make them potentially applicable in biomagnetic sensing.

@article{WOS:000540282500026, abstract = {Titanate nano-heterostructures have been prepared by a microwave-assisted hydrothermal method and then modified by replacing the Na+ ions present in the outer walls of the nanotubes (NT) by Fe3+ ions. The structural and magnetic properties of the product have been investigated in detail. It was observed that the titanate nanostructures are decorated with anatase (An) nanoparticles of size ca. 2 nm, producing TiNT@AnNP nanoheterostructures and that substitution with Fe3+ generates beta-FeOOH and alpha-Fe2O3 phases, furnishing FeTiNT@AnNP. HAADF-STEM analysis revealed a complex nano-heterostructure with nanoparticles of beta-FeOOH of size ca. 5 nm in the interlayer spaces and nanoparticles of alpha-Fe2O3 of size ca. 10-12 nm on the outer walls. Magnetic measurements at 300 K showed a ferromagnetic contribution in combination with a paramagnetic component for both the pristine and ion-exchanged samples. To the best of our knowledge, such iron-exchanged TiNT nano-heterostructures with alpha-Fe2O3 and beta-FeOOH phases have not been reported previously. The key feature of this work is that ion-exchange of titanate nanotubes with iron ions generates a complex nanoheterostructure, the optical and magnetic properties of which are systematically modified. As titanate nanotubes and their derivatives are well known for their low toxicity and good biocompatibility, the additional magnetic behavior shown by the nanostructures reported here may make them potentially applicable in biomagnetic sensing.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, author = {Gusmao, Suziete B S and Ghosh, Anupama and Marques, Thalles M F and Gusmao, Gustavo O M and Oliveira, Tainara G and Cavalcante, Luis Carlos D and Vasconcelos, Thiago L and Abreu, Guilherme J P and Guerra, Yuset and Pena-Garcia, R and Santos, Francisco Eroni P and Viana, Bartolomeu C}, biburl = {https://www.bibsonomy.org/bibtex/2513d8d39a49582d5acd6a8832b0e6f39/ppgfis_ufc_br}, doi = {10.1016/j.jpcs.2020.109561}, interhash = {be8ac55a6f2e7db620d28bb27fcc8561}, intrahash = {513d8d39a49582d5acd6a8832b0e6f39}, issn = {0022-3697}, journal = {JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS}, keywords = {Ion Iron; Magnetic exchange; nano-heterostructure; properties} {Titanate}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Structural and magnetic properties of titanate nano-heterostructures decorated with iron based nanoparticles}, tppubtype = {article}, volume = 145, year = 2020 }