Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration
Samo za registrovane korisnike
2016
Autori
Vranješ, MilaKuljanin-Jakovljević, Jadranka Ž.
Konstantinović, Z.
Pomar, A.
Ahrenkiel, Scott Phillip
Radetić, Tamara
Stoiljković, Milovan
Mitrić, Miodrag
Šaponjić, Zoran
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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 similar to 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 (H-c similar to 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 pos...sibility to control magnetic ordering by changing the shape/aspect ratio of Cu2+ doped TiO2 nanocrystals.
Ključne reči:
Nanostructures / Oxides / Semiconductors / Solvothermal / Magnetic properties / X-ray diffraction / Transmission electron microscopy (TEM) / Crystal structures / DefectsIzvor:
Materials Research Bulletin, 2016, 76, 100-106Izdavač:
- Pergamon-Elsevier Science Ltd, Oxford
Finansiranje / projekti:
- Nanostrukturni multifunkcionalni materijali i nanokompoziti (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45018)
- U.S. National Aeronautics and Space Administration South Dakota EPSCoR Space Grant Consortium
- Uticaj veličine, oblika i strukture nanočestica na njihova svojstva i svojstva nanokompozita (RS-MESTD-Basic Research (BR or ON)-172056)
- Materijali redukovane dimenzionalnosti za efikasnu apsorpciju svetlosti i konverziju energije (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
DOI: 10.1016/j.materresbull.2015.11.051
ISSN: 0025-5408
WoS: 000374195700014
Scopus: 2-s2.0-84950253589
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Vranješ, Mila AU - Kuljanin-Jakovljević, Jadranka Ž. AU - Konstantinović, Z. AU - Pomar, A. AU - Ahrenkiel, Scott Phillip AU - Radetić, Tamara AU - Stoiljković, Milovan AU - Mitrić, Miodrag AU - Šaponjić, Zoran PY - 2016 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3443 AB - 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 similar to 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 (H-c similar to 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. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Materials Research Bulletin T1 - Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration EP - 106 SP - 100 VL - 76 DO - 10.1016/j.materresbull.2015.11.051 ER -
@article{ author = "Vranješ, Mila and Kuljanin-Jakovljević, Jadranka Ž. and Konstantinović, Z. and Pomar, A. and Ahrenkiel, Scott Phillip and Radetić, Tamara and Stoiljković, Milovan and Mitrić, Miodrag and Šaponjić, Zoran", year = "2016", abstract = "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 similar to 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 (H-c similar to 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.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Materials Research Bulletin", title = "Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration", pages = "106-100", volume = "76", doi = "10.1016/j.materresbull.2015.11.051" }
Vranješ, M., Kuljanin-Jakovljević, J. Ž., Konstantinović, Z., Pomar, A., Ahrenkiel, S. P., Radetić, T., Stoiljković, M., Mitrić, M.,& Šaponjić, Z.. (2016). Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration. in Materials Research Bulletin Pergamon-Elsevier Science Ltd, Oxford., 76, 100-106. https://doi.org/10.1016/j.materresbull.2015.11.051
Vranješ M, Kuljanin-Jakovljević JŽ, Konstantinović Z, Pomar A, Ahrenkiel SP, Radetić T, Stoiljković M, Mitrić M, Šaponjić Z. Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration. in Materials Research Bulletin. 2016;76:100-106. doi:10.1016/j.materresbull.2015.11.051 .
Vranješ, Mila, Kuljanin-Jakovljević, Jadranka Ž., Konstantinović, Z., Pomar, A., Ahrenkiel, Scott Phillip, Radetić, Tamara, Stoiljković, Milovan, Mitrić, Miodrag, Šaponjić, Zoran, "Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration" in Materials Research Bulletin, 76 (2016):100-106, https://doi.org/10.1016/j.materresbull.2015.11.051 . .