{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T21:28:09Z","timestamp":1791322089761,"version":"4.3.1"},"reference-count":85,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T00:00:00Z","timestamp":1754956800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>BaTiO3 (BT) is an essential material for many applications due to its dielectric, ferroelectric, and piezoelectric properties; nevertheless, it has been reported to possess a \u201ccritical size\u201d in the nanoscale below which its outstanding properties are lost and the paraelectric cubic phase is stabilized at room temperature instead of the tetragonal phase. This value depends on multiple factors, mostly resulting from the synthesis route and conditions. Especially, internal stresses are known to promote the loss of tetragonality. Stresses are commonly present in water-containing synthesis routes because of the incorporation of hydroxyl groups into the oxygen sublattice of BaTiO3. On the other hand, the use of an organic solvent instead of water as a reaction medium overcomes the mentioned problem. This work presents a one-pot water-free solvothermal treatment of a Ti(O-iPr)4-Ba(OH)2\u00b78H2O sol in methanol in the presence of small amounts of oleic acid, which allows the synthesis of spherical crystalline BT nanoparticles (from ~12 nm to ~30 nm in diameter) at temperatures as low as 100 \u00b0C with a cubic\/tetragonal crystal structure confirmed by powder XRD, but predominantly tetragonal according to the Raman spectra. The retention of the tetragonal crystal structure is attributed to the lack of lattice hydroxyls (confirmed by FTIR spectroscopy) resulting from the use of an organic solvent (methanol) as reaction medium. To the best of the author\u2019s knowledge, this synthesis approach is the first report of tetragonal BT nanoparticles synthesized in methanol without the addition of extra water and without the need for a post-synthetic calcination step.<\/jats:p>","DOI":"10.3390\/nano15161226","type":"journal-article","created":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T07:53:44Z","timestamp":1754985224000},"page":"1226","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Synthesis of Tetragonal BaTiO3 Nanoparticles in Methanol"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6754-5003","authenticated-orcid":false,"given":"Nasser","family":"Mohamed-Noriega","sequence":"first","affiliation":[{"name":"Department of Inorganic Chemistry, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany"},{"name":"Faculty of Mechanical and Electrical Engineering, Universidad Aut\u00f3noma de Nuevo Le\u00f3n, Av. Universidad s\/n., Cd. Universitaria, San Nicol\u00e1s de los Garza 66451, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julia","family":"Grothe","sequence":"additional","affiliation":[{"name":"Department of Inorganic Chemistry, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefan","family":"Kaskel","sequence":"additional","affiliation":[{"name":"Department of Inorganic Chemistry, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,8,12]]},"reference":[{"key":"ref_1","unstructured":"(2014). Market Report\u2014Global Piezoelectric Device Market, Acmite Market Intelligence. [2nd ed.]."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1619","DOI":"10.1063\/1.336051","article-title":"Dielectric properties of fine grained barium titanate ceramics","volume":"58","author":"Arlt","year":"1985","journal-title":"J. Appl. Phys."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1555","DOI":"10.1111\/j.1151-2916.1989.tb07706.x","article-title":"Dependence of the crystal structure on particle size in barium titanate","volume":"72","author":"Uchino","year":"1989","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"3158","DOI":"10.1103\/PhysRevB.54.3158","article-title":"Grain-size effect on structure and phase transformations for barium titanate","volume":"54","author":"Frey","year":"1996","journal-title":"Phys. Rev. B Condens. Matter"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"735","DOI":"10.1021\/nl052538e","article-title":"Ferroelectric phase transition in individual single-crystalline BaTiO3 nanowires","volume":"6","author":"Spanier","year":"2006","journal-title":"Nano Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"192914","DOI":"10.1063\/1.3027067","article-title":"Composite structure and size effect of barium titanate nanoparticles","volume":"93","author":"Hoshina","year":"2008","journal-title":"Appl. Phys. Lett."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"156","DOI":"10.2109\/jcersj2.121.156","article-title":"Size effect of barium titanate: Fine particles and ceramics","volume":"121","author":"Hoshina","year":"2013","journal-title":"J. Ceram. Soc. Jpn."},{"key":"ref_8","first-page":"521","article-title":"Das Verhalten von kolloidalen Seignetteelektrika. I, Kaliumphosphat KH2PO4","volume":"26","author":"Jaccard","year":"1953","journal-title":"Helv. Phys. Acta"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"064110","DOI":"10.1063\/1.4751332","article-title":"Phase coexistence evolution of nano BaTiO3 as function of particle sizes and temperatures","volume":"112","author":"Zhu","year":"2012","journal-title":"J. Appl. Phys."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2834","DOI":"10.1557\/JMR.2004.0386","article-title":"X-ray diffraction study revealing phase coexistence in barium titanate stannate","volume":"19","author":"Mueller","year":"2011","journal-title":"J. Mater. Res."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"6587","DOI":"10.1103\/PhysRevB.61.6587","article-title":"Landau theory of structures in tetragonal-orthorhombic ferroelastics","volume":"61","author":"Jacobs","year":"2000","journal-title":"Phys. Rev. B"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1557\/mrc.2015.8","article-title":"Synthesis, physics, and applications of ferroelectric nanomaterials","volume":"5","author":"Polking","year":"2015","journal-title":"MRS Commun."},{"key":"ref_13","first-page":"343","article-title":"Tetragonality of barium titanate powder for a ceramic capacitor application","volume":"7","author":"Yoon","year":"2006","journal-title":"J. Ceram. Process. Res."},{"key":"ref_14","unstructured":"Bell, A.J. (1994, January 7\u201310). Grain size effects in barium titanate-revisited. Proceedings of the 1994 IEEE International Symposium on Applications of Ferroelectrics, University Park, PA, USA."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"391","DOI":"10.1007\/BF02745288","article-title":"Developments in ferroelectric ceramics for capacitor applications","volume":"15","author":"Pandey","year":"1992","journal-title":"Bull. Mater. Sci."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Tan, Y., Zhang, J., Wu, Y., Wang, C., Koval, V., Shi, B., Ye, H., McKinnon, R., Viola, G., and Yan, H. (2015). Unfolding grain size effects in barium titanate ferroelectric ceramics. Sci. Rep., 5.","DOI":"10.1038\/srep09953"},{"key":"ref_17","unstructured":"Lines, M.E., and Glass, A.M. (1977). Principles and Applications of Ferroelectrics and Related Materials, Oxford University Press."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1111\/j.1744-7402.2005.02008.x","article-title":"Progress in the synthesis of nanocrystalline BaTiO3 powders for MLCC","volume":"2","author":"Pithan","year":"2005","journal-title":"Int. J. Ceram. Technol."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/j.ceramint.2005.07.019","article-title":"Re-investigation of synthesis of BaTiO3 by conventional solid-state reaction and oxalate coprecipitation route for piezoelectric applications","volume":"33","author":"Hajjaji","year":"2007","journal-title":"Ceram. Int."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"486","DOI":"10.1016\/j.jcrysgro.2005.05.082","article-title":"BaTiO3 nanocrystals: Hydrothermal synthesis and structural characterization","volume":"284","author":"Zhu","year":"2005","journal-title":"J. Cryst. Growth"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"31","DOI":"10.4028\/www.scientific.net\/KEM.350.31","article-title":"Crystallinity of Barium Titanate Nanoparticles Synthesized by Sol-Gel Method","volume":"350","author":"Makino","year":"2007","journal-title":"Key Eng. Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"4709","DOI":"10.1007\/s10853-016-9789-7","article-title":"Wet chemical synthesis of rare earth-doped barium titanate nanoparticles","volume":"51","author":"Gomes","year":"2016","journal-title":"J. Mater. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1868","DOI":"10.1021\/ie070986m","article-title":"Hydrothermal Synthesis of Barium Titanate: Effect of Titania Precursor and Calcination Temperature on Phase Transition","volume":"47","author":"Sasirekha","year":"2008","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1016\/0955-2219(92)90075-O","article-title":"Characterization of hydrothermal barium titanate","volume":"9","author":"Hennings","year":"1992","journal-title":"J. Eur. Ceram. Soc."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1016\/0032-5910(89)80074-9","article-title":"Characterization of barium titanate fine powders formed from hydrothermal crystallization","volume":"57","author":"Vivekanandan","year":"1989","journal-title":"Powder Technol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"955","DOI":"10.1021\/cm00043a016","article-title":"Solid-State and Surface Spectroscopic Characterization of BaTiO3 Fine Powders","volume":"6","author":"Busca","year":"1994","journal-title":"Chem. Mater."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1111\/j.1151-2916.2001.tb00627.x","article-title":"Defect Chemistry and Microstructure of Hydrothermal Barium Titanate","volume":"84","author":"Hennings","year":"2001","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1039\/a805756g","article-title":"Hydrothermal synthesis and characterisation of BaTiO3 fine powders: Precursors, polymorphism and properties","volume":"9","author":"Clark","year":"1999","journal-title":"J. Mater. Chem."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"064106","DOI":"10.1103\/PhysRevB.108.064106","article-title":"Structural origin of recovered ferroelectricity in BaTiO3 nanoparticles","volume":"108","author":"Zhang","year":"2023","journal-title":"Phys. Rev. B"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1415","DOI":"10.1016\/j.apt.2014.02.016","article-title":"Supercritical fluid technology: A reliable process for high quality BaTiO3 based nanomaterials","volume":"25","author":"Philippot","year":"2014","journal-title":"Adv. Powder Technol."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Niederberger, M., and Pinna, N. (2009). Metal Oxide Nanoparticles in Organic Solvents, Springer.","DOI":"10.1007\/978-1-84882-671-7"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"2292","DOI":"10.1021\/cm970322a","article-title":"Nonhydrolytic Sol\u2212Gel Routes to Oxides","volume":"9","author":"Vioux","year":"1997","journal-title":"Chem. Mater."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"793","DOI":"10.1021\/ar600035e","article-title":"Nonaqueous sol-gel routes to metal oxide nanoparticles","volume":"40","author":"Niederberger","year":"2007","journal-title":"Acc. Chem. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"4594","DOI":"10.1021\/cm0503376","article-title":"Nonaqueous Synthesis of Amorphous Powder Precursors for Nanocrystalline PbTiO3, Pb(Zr,Ti)O3, and PbZrO3","volume":"17","author":"Garnweitner","year":"2005","journal-title":"Chem. Mater."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1557\/PROC-32-157","article-title":"Preparation of barium titanate films using sol-gel techniques","volume":"32","author":"Dosch","year":"1984","journal-title":"MRS Proc."},{"key":"ref_36","first-page":"733","article-title":"Chemical processing and dielectric properties of BaTiO3 ceramics","volume":"51","author":"Takashi","year":"1995","journal-title":"Ceram. Trans."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"2270","DOI":"10.1002\/anie.200353300","article-title":"A general soft-chemistry route to perovskites and related materials: Synthesis of BaTiO3, BaZrO3, and LiNbO3 nanoparticles","volume":"43","author":"Niederberger","year":"2004","journal-title":"Angew. Chem. Int. Ed. Engl."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"1571","DOI":"10.1016\/j.jssc.2008.04.016","article-title":"Nonaqueous synthesis of metal oxide nanoparticles: Short review and doped titanium dioxide as case study for the preparation of transition metal-doped oxide nanoparticles","volume":"181","author":"Djerdj","year":"2008","journal-title":"J. Solid. State Chem."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"3603","DOI":"10.1016\/j.ceramint.2013.09.065","article-title":"Influence of synthesis conditions on the properties of electrochemically synthesized BaTiO3 nanoparticles","volume":"40","author":"Santos","year":"2014","journal-title":"Ceram. Int."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1039\/D2DT03307K","article-title":"Solvothermal synthesis of nanoscale BaTiO3 in benzyl alcohol\u2013water mixtures and effects of manganese oxide coating to enhance the PTCR effect","volume":"52","author":"Zhang","year":"2023","journal-title":"Dalton Trans."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"114585","DOI":"10.1016\/j.sna.2023.114585","article-title":"From synthesis to application: High-quality flexible piezoelectric sensors fabricated from tetragonal BaTiO3\/P(VDF-TrFE) composites","volume":"361","author":"Taleb","year":"2023","journal-title":"Sens. Actuators A Phys."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"513","DOI":"10.1016\/j.jcrysgro.2006.02.012","article-title":"Facile synthesis of submicron BaTiO3 crystallites by a liquid\u2013solid reaction method","volume":"290","author":"Zhang","year":"2006","journal-title":"J. Cryst. Growth"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"2281","DOI":"10.1016\/j.ceramint.2021.10.006","article-title":"Hydroxylation mechanism of phase regulation of nanocrystal BaTiO3 synthesized by a hydrothermal method","volume":"48","author":"Ji","year":"2022","journal-title":"Ceram. Int."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"108507","DOI":"10.1016\/j.nanoen.2023.108507","article-title":"Review on strategies toward efficient piezocatalysis of BaTiO3 nanomaterials for wastewater treatment through harvesting vibration energy","volume":"113","author":"Zhang","year":"2023","journal-title":"Nano Energy"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1232","DOI":"10.1016\/j.matchemphys.2010.08.063","article-title":"Solvothermal synthesis and Curie temperature of monodispersed barium titanate nanoparticles","volume":"124","author":"Mao","year":"2010","journal-title":"Mater. Chem. Phys."},{"key":"ref_46","first-page":"575","article-title":"Ferroelectric BaTiO3 thin films and ceramics fabrication by sol-gel synthesis","volume":"32","author":"Cho","year":"1992","journal-title":"Korean Phys. Soc."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"1011","DOI":"10.1016\/S0955-2219(98)00364-1","article-title":"Preparation and properties of (Ba0\u00b77Sr0\u00b73)TiO3 powders and thin films using precursor solutions formed from alkoxide-hydroxide","volume":"19","author":"Hayashi","year":"1999","journal-title":"J. Eur. Ceram. Soc."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"481","DOI":"10.1007\/s12034-014-0690-1","article-title":"Characterization, dielectric and electrical behaviour of BaTiO3 nanoparticles prepared via Titanium (IV) triethanolaminato isopropoxide and hydrated Barium","volume":"37","author":"Upadhyah","year":"2014","journal-title":"Bull. Mater. Sci."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"2637","DOI":"10.1111\/j.1151-2916.2000.tb01606.x","article-title":"Solvothermal Synthesis and Characterization of Barium Titanate Powders","volume":"83","author":"Chen","year":"2004","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"12085","DOI":"10.1021\/ja011414a","article-title":"Synthesis of Monodisperse Nanoparticles of Barium Titanate: Toward a Generalized Strategy of Oxide Nanoparticle Synthesis","volume":"123","author":"Brus","year":"2001","journal-title":"J. Am. Chem. Soc."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1557\/PROC-879-Z9.8","article-title":"Nonaqueous synthesis of barium titanate nanocrystals in acetophenone as oxygen supplying agent","volume":"879","author":"Niederberger","year":"2005","journal-title":"MRS Proc."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"6955","DOI":"10.1021\/ja0758436","article-title":"Crystal structure and the paraelectric-to-ferroelectric phase transition of nanoscale BaTiO3","volume":"130","author":"Smith","year":"2008","journal-title":"J. Am. Chem. Soc."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"979","DOI":"10.1016\/j.matlet.2005.10.089","article-title":"Solvothermal synthesis of nano-sized tetragonal barium titanate powders","volume":"60","author":"Kwon","year":"2006","journal-title":"Mater. Lett."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"1401","DOI":"10.1016\/j.jeurceramsoc.2005.02.003","article-title":"Solvothermally synthesized tetragonal barium titanate powders using H2O\/EtOH solvent","volume":"26","author":"Kwon","year":"2006","journal-title":"J. Eur. Ceram. Soc."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1111\/j.1551-2916.2007.02098.x","article-title":"Synthesis of Highly Dispersed Barium Titanate Nanoparticles by a Novel Solvothermal Method","volume":"91","author":"Wei","year":"2007","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"195","DOI":"10.14356\/kona.2004023","article-title":"Size effect for barium titanate nano-particles","volume":"22","author":"Ohno","year":"2004","journal-title":"Kona"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"7487","DOI":"10.1063\/1.357978","article-title":"Investigation of the structure of barium titanate thin films by Raman spectroscopy","volume":"76","author":"Robins","year":"1994","journal-title":"J. Appl."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"522","DOI":"10.1103\/PhysRev.174.522","article-title":"Raman Spectrum of Single-Domain BaTiO3","volume":"174","author":"DiDomenico","year":"1968","journal-title":"Phys. Rev."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"3307","DOI":"10.1063\/1.1596720","article-title":"Ferroelectric transition in an epitaxial barium titanate thin film: Raman spectroscopy and X-ray diffraction study","volume":"94","author":"Lukyanchuk","year":"2003","journal-title":"J. Appl. Phys."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"1317","DOI":"10.1016\/j.physb.2011.01.024","article-title":"Core-shell structure and size effect in barium titanate nanoparticle","volume":"406","author":"Fang","year":"2011","journal-title":"Phys. B Condens. Matter"},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"9475","DOI":"10.1021\/ja303184w","article-title":"Structural evolution of BaTiO3 nanocrystals synthesized at room temperature","volume":"134","author":"Rabuffetti","year":"2012","journal-title":"J. Am. Chem. Soc."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"132058","DOI":"10.1016\/j.optcom.2025.132058","article-title":"Ferroelectric-to-paraelectric phase transition probing via high-resolution tip-enhanced Raman spectroscopy","volume":"591","author":"Bakhtbidar","year":"2025","journal-title":"Opt. Commun."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"8904","DOI":"10.1016\/j.ceramint.2020.12.011","article-title":"Hydrothermal synthesis of barium titanate nano\/microrods and particle agglomerates using a sodium titanate precursor","volume":"47","author":"Surmenev","year":"2021","journal-title":"Ceram. Int."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"16305","DOI":"10.1016\/j.ceramint.2019.05.156","article-title":"Polymorphic phase transition in BaTiO3 by Ni doping","volume":"45","author":"Duong","year":"2019","journal-title":"Ceram. Int."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"134115","DOI":"10.1103\/PhysRevB.74.134115","article-title":"Size effect on the dielectric properties of BaTiO3 nanoceramics in a modified Ginsburg-Landau-Devonshire thermodynamic theory","volume":"74","author":"Lin","year":"2006","journal-title":"Phys. Rev. B"},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1080\/00150199008223825","article-title":"The influence of microstructure on the properties of ferroelectric ceramics","volume":"104","author":"Arlt","year":"1990","journal-title":"Ferroelectrics"},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"73714","DOI":"10.1039\/C5RA14351A","article-title":"Impact of Gd3+ substitution on the structural, magnetic and electrical properties of cobalt ferrite nanoparticles","volume":"5","author":"Murugesan","year":"2015","journal-title":"RSC Adv."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"2049","DOI":"10.1016\/j.jmmm.2011.03.017","article-title":"Mossbauer, Raman and X-ray diffraction studies of superparamagnetic NiFe2O4 nanoparticles prepared by sol\u2013gel auto-combustion method","volume":"323","author":"Ahlawat","year":"2011","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"19812","DOI":"10.1021\/jp9615924","article-title":"Correlation between the vibrational frequencies of the carboxylate group and the types of its coordination to a metal ion: An ab initio molecular orbital study","volume":"3654","author":"Nara","year":"1996","journal-title":"J. Phys. Chem."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"3153","DOI":"10.1021\/cm900532q","article-title":"Solution-Processable Barium Titanate and Strontium Titanate Nanoparticle Dielectrics for Low-Voltage Organic Thin-Film Transistors","volume":"21","author":"Cai","year":"2009","journal-title":"Chem. Mater."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"014102","DOI":"10.1103\/PhysRevB.76.014102","article-title":"Phase transitions induced by confinement of ferroic nanoparticles","volume":"76","author":"Morozovska","year":"2007","journal-title":"Phys. Rev. B Condens. Matter Mater. Phys."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"177","DOI":"10.14356\/kona.2004021","article-title":"Effect of Mixing Condition on Sol-Gel Synthesis of Barium Titanate Ultrafine Particles [Translated]\u2020","volume":"22","author":"Gomi","year":"2004","journal-title":"KONA Powder Part. J."},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"383","DOI":"10.2109\/jcersj.104.383","article-title":"Role of Lattice Defects in the Size Effect of Barium Titanate Fine Particles","volume":"104","author":"Wada","year":"1996","journal-title":"J. Ceram. Soc. Jpn."},{"key":"ref_74","doi-asserted-by":"crossref","first-page":"1816","DOI":"10.1111\/j.1551-2916.2006.01056.x","article-title":"Formation Mechanisms of Tetragonal Barium Titanate Nanoparticles in Alkoxide-Hydroxide Sol-Precipitation Synthesis","volume":"89","author":"Yoon","year":"2006","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_75","doi-asserted-by":"crossref","first-page":"6911","DOI":"10.1016\/j.ceramint.2012.05.017","article-title":"Electron microscopy study of intragranular nanoporosity and the occurrence of local structural disorder in cubic BaTiO3 nanopowders from alkoxide\u2013hydroxide precipitation process","volume":"38","author":"Stawski","year":"2012","journal-title":"Ceram. Int."},{"key":"ref_76","unstructured":"Wakaki, M., Shibuya, T., and Kudo, K. (2007). Physical Properties and Data of Optical Materials, CRC Press (Taylor & Francis Group)."},{"key":"ref_77","doi-asserted-by":"crossref","first-page":"8398","DOI":"10.1039\/C4CE01195C","article-title":"Diversity in size of barium titanate nanocubes synthesized by a hydrothermal method using an aqueous Ti compound","volume":"16","author":"Ma","year":"2014","journal-title":"CrystEngComm"},{"key":"ref_78","doi-asserted-by":"crossref","first-page":"507","DOI":"10.1021\/nn102385e","article-title":"The size-dependent ferroelectric phase transition in BaTiO3 nanocrystals probed by surface plasmons","volume":"5","author":"Szwarcman","year":"2011","journal-title":"ACS Nano"},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1016\/j.supflu.2015.05.004","article-title":"Synthesis of fine-crystalline tetragonal barium titanate in low-density water fluid","volume":"105","author":"Kholodkova","year":"2015","journal-title":"J. Supercrit. Fluids"},{"key":"ref_80","doi-asserted-by":"crossref","first-page":"1893","DOI":"10.1039\/c0gc00264j","article-title":"Vegetable oil-based polymeric materials: Synthesis, properties, and applications","volume":"12","author":"Xia","year":"2010","journal-title":"Green Chem."},{"key":"ref_81","doi-asserted-by":"crossref","unstructured":"Shahidi, F. (2005). Bailey\u2019s Industrial Oil and Fat Products, Wiley-Interscience. [6th ed.].","DOI":"10.1002\/047167849X"},{"key":"ref_82","doi-asserted-by":"crossref","first-page":"979","DOI":"10.1002\/ejoc.200400546","article-title":"Ketonization of Carboxylic Acids by Decarboxylation: Mechanism and Scope","volume":"2005","author":"Renz","year":"2005","journal-title":"Eur. J. Org. Chem."},{"key":"ref_83","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1016\/0955-2219(91)90116-H","article-title":"Hydrothermal preparation of barium titanate from barium-titanium acetate gel precursors","volume":"8","author":"Hennings","year":"1991","journal-title":"J. Eur. Ceram. Soc."},{"key":"ref_84","doi-asserted-by":"crossref","first-page":"388","DOI":"10.2109\/jcersj2.121.388","article-title":"Low-temperature syntheses of cubic BaTiO3 nanoparticles in highly basic aqueous solution","volume":"121","author":"Kageyama","year":"2013","journal-title":"J. Ceram. Soc. Jpn."},{"key":"ref_85","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1007\/s10971-009-2121-0","article-title":"Sol\u2013gel reactions of titanium alkoxides and water: Influence of pH and alkoxy group on cluster formation and properties of the resulting products","volume":"53","author":"Simonsen","year":"2009","journal-title":"J. Solgel Sci. Technol."}],"container-title":["Nanomaterials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-4991\/15\/16\/1226\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T18:25:14Z","timestamp":1760034314000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-4991\/15\/16\/1226"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,8,12]]},"references-count":85,"journal-issue":{"issue":"16","published-online":{"date-parts":[[2025,8]]}},"alternative-id":["nano15161226"],"URL":"https:\/\/doi.org\/10.3390\/nano15161226","relation":{},"ISSN":["2079-4991"],"issn-type":[{"value":"2079-4991","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,8,12]]}}}