2010
DOI: 10.2109/jcersj2.118.876
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Synthesis and photoactivity of hetero-nanostructured SrTiO3

Abstract: A SrTiO 3 hetero-nanostructure was synthesized via solvothermal reaction using a protonated trititanate nanowire (H 2 Ti 3 O 7 ) and strontium hydroxide octahydrate (Sr(OH) 2 ·8H 2 O) in an ethanol/water mixed solvent system. The ethanol to deionized water volume ratio was the controlling parameters for determining the phase formation and the particle size of the SrTiO 3 nanocrystals. Single-phase cubic perovskite SrTiO 3 began to form at 120°C in a mixed solvent containing >40% ethanol by volume. Field emissi… Show more

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Cited by 15 publications
(6 citation statements)
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“…Among functional oxides, Ti‐based oxides including titanium dioxide (TiO 2 ) and strontium titanium oxide (SrTiO 3 /STO) are widely investigated. STO is well known not only as popular substrate for film growth, but also for many interesting properties, such as superconductivity, blue‐light emission, insulator–metal transition, and photocatalytic properties . Recently, STO has also been explored for resistive switching memory and optoelectronic applications .…”
Section: Introductionmentioning
confidence: 99%
“…Among functional oxides, Ti‐based oxides including titanium dioxide (TiO 2 ) and strontium titanium oxide (SrTiO 3 /STO) are widely investigated. STO is well known not only as popular substrate for film growth, but also for many interesting properties, such as superconductivity, blue‐light emission, insulator–metal transition, and photocatalytic properties . Recently, STO has also been explored for resistive switching memory and optoelectronic applications .…”
Section: Introductionmentioning
confidence: 99%
“…Here, ρ, m , and C are the density, mass, and concentration of the solute molecule, respectively; γ is the interfacial energy between the solute and solvent; r + and r − are the radii of the charged z + and z − ions, respectively; e and ε 0 are the charge and dielectric constant in a vacuum, respectively. Thus, the low dielectric constant (32.7) of CH 3 OH decreases the nuclei radius, making the solution more supersaturated and accelerating the nucleation rate, where these conditions favor homogeneous nucleation and the formation of spherical particles ( Figure a). By contrast, when water was used as the solvent instead of methanol, ZIF‐67 stacked nanoplates were formed (Figure b) because the high dielectric constant of water (80.1) decreases the nucleation rate, which promotes heterogeneous nucleation and lateral growth with a preferred surface .…”
Section: Resultsmentioning
confidence: 99%
“…It can be easily prepared, for example, by solid-state synthesis, but not without expending abundant energy for heat treatment at temperatures in excess of 700 ºC [1][2][3] . Hydrothermal synthesis yields a small particle oxide with a high crystallinity at lower temperatures of around 100 to 200 ºC [4][5][6][7][8] , but this process requires an autoclave, a closed vessel to endure the high pressure.…”
Section: Introductionmentioning
confidence: 99%