Room temperature ferromagnetism in Cu2+ doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration

M. Vranješ; J. Kuljanin-Jakovljević; Z. Konstantinović; A. Pomar; S. P. Ahrenkiel; T. Radetić; M. Stoiljković; M. Mitrić; Z. Šaponjić

doi:10.1016/j.materresbull.2015.11.051

Room temperature ferromagnetism in Cu2+ doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration

M. Vranješ, J. Kuljanin-Jakovljević, Z. Konstantinović, A. Pomar, S. P. Ahrenkiel, T. Radetić, M. Stoiljković, M. Mitrić, Z. Šaponjić

Research output: Contribution to journal › Article › Research › peer-review

7 Citations (Scopus)

Abstract

© 2015 Elsevier Ltd. Cu2+ doped TiO2 nanocrystals were synthesized using dispersions of titania nanotubes in the presence of Cu2+ ions as a precursors. The morphologies of nanotubular titania precursors and resulted Cu2+ doped TiO2 nanocrystals were characterized by TEM. Structural and optical properties were studied by XRPD analysis and UV-vis spectroscopy in reflectance mode, respectively. Their magnetic properties were investigated using SQUID magnetometer. Tetragonal anatase crystalline structure was confirmed in all synthesized samples. Polygonal (d ∼ 15 nm) and spheroid like (length, up to 90 nm) Cu2+ doped TiO2 nanocrystals in samples synthesized at different pHs were observed by TEM. Ferromagnetic ordering with almost closed loop (Hc ∼ 200 Oe) was detected in all Cu2+ doped TiO2 nanoparticle films. The saturation magnetization values varied depending on the Cu2+ concentration, nanoparticles shape, size and consequently different number of oxygen vacancies. This study revealed possibility to control magnetic ordering by changing the shape/aspect ratio of Cu2+ doped TiO2 nanocrystals.

Original language	English
Pages (from-to)	100-106
Journal	Materials Research Bulletin
Volume	76
DOIs	https://doi.org/10.1016/j.materresbull.2015.11.051
Publication status	Published - 1 Apr 2016

Keywords

A. Nanostructures
A. Oxides
A. Semiconductors
B. Magnetic properties
B. Solvothermal
C. Transmission electron microscopy (TEM)
C. X-ray diffraction
D. Crystal structures
D. Defects

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Vranješ, M., Kuljanin-Jakovljević, J., Konstantinović, Z., Pomar, A., Ahrenkiel, S. P., Radetić, T., Stoiljković, M., Mitrić, M., & Šaponjić, Z. (2016). Room temperature ferromagnetism in Cu2+ doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration. Materials Research Bulletin, 76, 100-106. https://doi.org/10.1016/j.materresbull.2015.11.051

@article{59c1dd17c2c74095a314f2fc739003fd,

title = "Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration",

abstract = "{\textcopyright} 2015 Elsevier Ltd. Cu2+ doped TiO2 nanocrystals were synthesized using dispersions of titania nanotubes in the presence of Cu2+ ions as a precursors. The morphologies of nanotubular titania precursors and resulted Cu2+ doped TiO2 nanocrystals were characterized by TEM. Structural and optical properties were studied by XRPD analysis and UV-vis spectroscopy in reflectance mode, respectively. Their magnetic properties were investigated using SQUID magnetometer. Tetragonal anatase crystalline structure was confirmed in all synthesized samples. Polygonal (d ∼ 15 nm) and spheroid like (length, up to 90 nm) Cu2+ doped TiO2 nanocrystals in samples synthesized at different pHs were observed by TEM. Ferromagnetic ordering with almost closed loop (Hc ∼ 200 Oe) was detected in all Cu2+ doped TiO2 nanoparticle films. The saturation magnetization values varied depending on the Cu2+ concentration, nanoparticles shape, size and consequently different number of oxygen vacancies. This study revealed possibility to control magnetic ordering by changing the shape/aspect ratio of Cu2+ doped TiO2 nanocrystals.",

keywords = "A. Nanostructures, A. Oxides, A. Semiconductors, B. Magnetic properties, B. Solvothermal, C. Transmission electron microscopy (TEM), C. X-ray diffraction, D. Crystal structures, D. Defects",

author = "M. Vranje{\v s} and J. Kuljanin-Jakovljevi{\'c} and Z. Konstantinovi{\'c} and A. Pomar and Ahrenkiel, {S. P.} and T. Radeti{\'c} and M. Stoiljkovi{\'c} and M. Mitri{\'c} and Z. {\v S}aponji{\'c}",

year = "2016",

month = apr,

day = "1",

doi = "10.1016/j.materresbull.2015.11.051",

language = "English",

volume = "76",

pages = "100--106",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Limited",

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Vranješ, M, Kuljanin-Jakovljević, J, Konstantinović, Z, Pomar, A, Ahrenkiel, SP, Radetić, T, Stoiljković, M, Mitrić, M & Šaponjić, Z 2016, 'Room temperature ferromagnetism in Cu2+ doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration', Materials Research Bulletin, vol. 76, pp. 100-106. https://doi.org/10.1016/j.materresbull.2015.11.051

Room temperature ferromagnetism in Cu2+ doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration. / Vranješ, M.; Kuljanin-Jakovljević, J.; Konstantinović, Z.; Pomar, A.; Ahrenkiel, S. P.; Radetić, T.; Stoiljković, M.; Mitrić, M.; Šaponjić, Z.

In: Materials Research Bulletin, Vol. 76, 01.04.2016, p. 100-106.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration

AU - Vranješ, M.

AU - Kuljanin-Jakovljević, J.

AU - Konstantinović, Z.

AU - Pomar, A.

AU - Ahrenkiel, S. P.

AU - Radetić, T.

AU - Stoiljković, M.

AU - Mitrić, M.

AU - Šaponjić, Z.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - © 2015 Elsevier Ltd. Cu2+ doped TiO2 nanocrystals were synthesized using dispersions of titania nanotubes in the presence of Cu2+ ions as a precursors. The morphologies of nanotubular titania precursors and resulted Cu2+ doped TiO2 nanocrystals were characterized by TEM. Structural and optical properties were studied by XRPD analysis and UV-vis spectroscopy in reflectance mode, respectively. Their magnetic properties were investigated using SQUID magnetometer. Tetragonal anatase crystalline structure was confirmed in all synthesized samples. Polygonal (d ∼ 15 nm) and spheroid like (length, up to 90 nm) Cu2+ doped TiO2 nanocrystals in samples synthesized at different pHs were observed by TEM. Ferromagnetic ordering with almost closed loop (Hc ∼ 200 Oe) was detected in all Cu2+ doped TiO2 nanoparticle films. The saturation magnetization values varied depending on the Cu2+ concentration, nanoparticles shape, size and consequently different number of oxygen vacancies. This study revealed possibility to control magnetic ordering by changing the shape/aspect ratio of Cu2+ doped TiO2 nanocrystals.

AB - © 2015 Elsevier Ltd. Cu2+ doped TiO2 nanocrystals were synthesized using dispersions of titania nanotubes in the presence of Cu2+ ions as a precursors. The morphologies of nanotubular titania precursors and resulted Cu2+ doped TiO2 nanocrystals were characterized by TEM. Structural and optical properties were studied by XRPD analysis and UV-vis spectroscopy in reflectance mode, respectively. Their magnetic properties were investigated using SQUID magnetometer. Tetragonal anatase crystalline structure was confirmed in all synthesized samples. Polygonal (d ∼ 15 nm) and spheroid like (length, up to 90 nm) Cu2+ doped TiO2 nanocrystals in samples synthesized at different pHs were observed by TEM. Ferromagnetic ordering with almost closed loop (Hc ∼ 200 Oe) was detected in all Cu2+ doped TiO2 nanoparticle films. The saturation magnetization values varied depending on the Cu2+ concentration, nanoparticles shape, size and consequently different number of oxygen vacancies. This study revealed possibility to control magnetic ordering by changing the shape/aspect ratio of Cu2+ doped TiO2 nanocrystals.

KW - A. Nanostructures

KW - A. Oxides

KW - A. Semiconductors

KW - B. Magnetic properties

KW - B. Solvothermal

KW - C. Transmission electron microscopy (TEM)

KW - C. X-ray diffraction

KW - D. Crystal structures

KW - D. Defects

U2 - 10.1016/j.materresbull.2015.11.051

DO - 10.1016/j.materresbull.2015.11.051

M3 - Article

VL - 76

SP - 100

EP - 106

JO - Materials Research Bulletin

JF - Materials Research Bulletin

SN - 0025-5408

ER -

Room temperature ferromagnetism in Cu<sup>2+</sup> doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration

Abstract

Keywords

Access to Document

Fingerprint Dive into the research topics of 'Room temperature ferromagnetism in Cu<sup>2+</sup> doped TiO<inf>2</inf> nanocrystals: The impact of their size, shape and dopant concentration'. Together they form a unique fingerprint.

Cite this