Tuning the morphology of SrTiO3 nanocubes and their enhanced electrical conductivity

Putri, Yulia Eka; Wendari, Tio Putra; Rahmah, Annisa Aulia; Refinel, Refinel; Said, Suhana Mohd; Sofyan, Nofrijon; Wellia, Diana Vanda

doi:10.1016/j.ceramint.2021.11.075

Cited by 8 publications

(3 citation statements)

References 35 publications

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“…In Table 4, it is possible to observe that samples with similar band gap values (such as SP and SG-800) have similar dielectric constants, and a higher band gap leads to a higher dielectric constant obtained. This tendency is in accordance with the literature and occurred linearly (adjusted equation: Y (dielectric constant) = −949.19 + 291.52X (band gap) , with r 2 = 0.9522) [19,20], corroborating the fact that the band structure of the material plays a more major role in the dielectric constants than the crystallite size itself.…”

Section: Samplesupporting

confidence: 90%

The Influence of the Synthesis Method on the Characteristics of BaTiO3

et al. 2023

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In this work, barium titanate powders were produced by sol-gel and sol-precipitation methods from metal alkoxides. In the sol-gel method, tetraisopropyl orthotitanate was mixed with 2-propanol, acetic acid and barium acetate, and the gel samples obtained were calcined at 600 °C, 800 °C and 1000 °C. Through the sol-precipitation method, tetraisopropyl orthotitanate was mixed with acetic acid and deionized water and precipitated by the addition of a concentrated solution of KOH. The products were calcined at various temperatures, and the microstructural and dielectric properties of the BaTiO3 prepared for the two processes were analyzed and compared. The results of these analyses allowed us to observe an increase in the tetragonal phase and the dielectric constant (15–50 at 20 kHz) with increasing temperatures in the samples produced by the sol-gel method, while the sample obtained by sol precipitation was cubic. The presence of BaCO3 is more evident in the sample produced by sol-precipitation, and the band gap of the products obtained did not show significant variation, changing the synthesis method (3.363–3.594 eV).

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Section: Samplesupporting

confidence: 90%

The Influence of the Synthesis Method on the Characteristics of BaTiO3

et al. 2023

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“…Inside the perovskite structure, Sr 2+ ions are in the corners and Ti 4+ ions in the centers of the cube, while O 2-anions surround Ti 4+ ions to form a regular octahedron in the cubic symmetry. Each Sr 2+ ion is surrounded by four TiO 6 octahedra and coordinated by twelve O 2ions, whereas the Ti 4+ ion is sixfold coordinated by the O 2ion [4]. In the TiO6 octahedra, the hybridization of the O-2p state with the Ti-3d state results in a pronounced covalent bonding, whereas the Sr 2+ and O 2ions exhibit ionic bonding characteristics.…”

Section: Introductionmentioning

confidence: 99%

Optical response of SrTiO₃ thin films grown via a sol-gel-hydrothermal method

et al. 2023

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The polycrystalline SrTiO3 thin films were prepared by the sol-gel-hydrothermal method on glass substrates. The synthesis pathway was initiated by preparing a clear TiO2 solution using the sol-gel method. This clear solution was then deposited on a glass substrate using the dip coating technique, followed by the transformation of a thin layer of TiO2 into SrTiO3 by the hydrothermal method. The crystal structure, bond interactions, and band gap energy of SrTiO3 thin layers were characterized using X-ray Diffraction (XRD), Fourier Transform Infra-Red spectroscopy (FTIR), and UV–Vis Diffuse Reflectance Spectroscopy (UV-DRS). The XRD patterns of all SrTiO3 thin layers indicated the perovskite structure of the samples. The FTIR spectrum showed an interaction of the silanol groups on the surface of the glass substrate with Ti–O–Ti of SrTiO3 layers. The characteristics of the UV-DRS spectrum were influenced by the thickness of the SrTiO3 layer formed on the glass substrate. The findings of this work provide insights for producing SrTiO3 layers with specified thickness and morphology.

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“…The synthesis parameters, such as molar ratios, solvents, additives, and synthesis temperature and time, significantly affect the purity and morphology of resulting particles [19]. In our previous work, we successfully synthesized highly polycrystalline samples of SrTiO3 nanocubes via the solvothermal method, utilizing CTAB and TBA's synergistic effect as a capping agent and mineralizer [20]. SrTiO3 nanocubes demonstrated distinguishing characteristics related to their shape, namely the phenomenon of surface scattering to introduce new functionalities.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of lanthanum-doped SrTiO₃ nanocubes mediated by cetyltrimethylammonium bromide and tert-butylamine under solvothermal condition and their tunable electrical properties

Putri,

Faradilla,

Satria

et al. 2023

Chim.Tech.Acta

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The electrical conductivity of low concentrations of lanthanum-doped SrTiO3 nanocube ceramics synthesized using the facile solvothermal method in mixed organic and inorganic solvents with cetyltrimethylammonium bromide (CTAB) as a capping agent and tert-butyl amine (TBA) as a mineralizer was investigated. X-ray diffraction patterns confirmed the formation of a high-purity perovskite phase, corresponding to the standard data and the pattern refinement results. The particles of the sample were nanocubes, whereas the La-doped SrTiO3 sample particles were more uniform in size and shape, as shown in TEM images. The FT-IR spectrum confirmed the vibration of the CH3-N+ groups from CTAB and TBA, indicating an electrostatic interaction between their functional groups and the particle surface. Substitution of La3+ ions at low concentrations increased electrical conductivity compared to the undoped SrTiO3 sample. Lanthanum donates excess electrons, thereby increasing the number of electron carriers, which causes a reduction in the band gap energy according to the UV-DRS spectrum analysis using the Tauc equation.

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Tuning the morphology of SrTiO3 nanocubes and their enhanced electrical conductivity

Cited by 8 publications

References 35 publications

The Influence of the Synthesis Method on the Characteristics of BaTiO3

The Influence of the Synthesis Method on the Characteristics of BaTiO3

Optical response of SrTiO₃ thin films grown via a sol-gel-hydrothermal method

Facile synthesis of lanthanum-doped SrTiO₃ nanocubes mediated by cetyltrimethylammonium bromide and tert-butylamine under solvothermal condition and their tunable electrical properties

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Tuning the morphology of SrTiO3 nanocubes and their enhanced electrical conductivity

Cited by 8 publications

References 35 publications

The Influence of the Synthesis Method on the Characteristics of BaTiO3

The Influence of the Synthesis Method on the Characteristics of BaTiO3

Optical response of SrTiO3 thin films grown via a sol-gel-hydrothermal method

Facile synthesis of lanthanum-doped SrTiO3 nanocubes mediated by cetyltrimethylammonium bromide and tert-butylamine under solvothermal condition and their tunable electrical properties

Contact Info

Product

Resources

About

Optical response of SrTiO₃ thin films grown via a sol-gel-hydrothermal method

Facile synthesis of lanthanum-doped SrTiO₃ nanocubes mediated by cetyltrimethylammonium bromide and tert-butylamine under solvothermal condition and their tunable electrical properties