Fabrication of nanoporous MTiO3 (M = Pb, Ba, Sr) perovskite array films with unprecedented high structural regularity

Im, Badro; Jun, Hwichan; Lee, Kyung Hee; Lee, Jae Sung

doi:10.1039/c1ce05891f

Cited by 12 publications

(12 citation statements)

References 34 publications

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“…The single SrTiO 3 (Fe x Sr 1‐ x TiO 3 products with x = 0) exhibits obvious diffraction peaks at 2 θ = 22.8°, 32.4°, 40.0°, 46.5°, 52.4°, 57.8° and 67.8° (Figure a), corresponding to the reflections of (100), (110), (111), (200), (210), (211) and (220) planes of cubic SrTiO 3 (JCPDS No. 73–0661), respectively. The Fe x Sr 1‐ x TiO 3 products with x ≤ 0.10 show XRD patterns very similar to the single SrTiO 3 , while the product with x = 0.15 delivers very weak new peaks, which intensities show an increasing trend along with the increase of x value from 0.15 to 0.75 (Figure b).…”

Section: Resultsmentioning

confidence: 97%

Fabrication of an Fe‐Doped SrTiO₃ Photocatalyst with Enhanced Dinitrogen Photofixation Performance

et al. 2019

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SrTiO3 as semiconducting photocatalyst has been extensively investigated due to its band edges meeting the thermodynamic requirements for water splitting, but a few attention has been concentrated on its application in the NH3 synthesis via N2 photofixation process. Herein, Fe‐doped SrTiO3 (FexSr1–xTiO3) products (0 ≤ x ≤ 0.20) were synthesized via a hydrothermal process followed by calcination at 700 °C. All FexSr1–xTiO3 products (0.03 ≤ x ≤ 0.20) deliver an enhanced N2 fixation ability, and FexSr1–xTiO3 (x = 0.10) achieves the best NH3 production activity of 30.1 µmol g–1 h–1, which is 3.2‐hold higher than that of SrTiO3 alone. Once the x value is higher than 0.10, FexSr1–xTiO3 will transform into composites containing Fe‐doped SrTiO3 and α‐Fe2O3, which acts as charge recombination sites, thus causes a decreased N2 fixation activity. Further investigations demonstrate that the surface Fe3+‐doped sites can not only chemisorb and activate N2 molecules, but also promote the interfacial electron transfer from Fe‐doped SrTiO3 to N2 molecules, and thus significantly improve the N2 fixation ability. The present Fe‐doped SrTiO3 products exhibit characteristic features such as stable and efficient N2 fixation ability as well as simultaneous realization of N2 reduction and H2O oxidation without co‐catalyst, which are of significance in artificial photosynthesis with H2O as electron and proton sources.

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Section: Resultsmentioning

confidence: 97%

Fabrication of an Fe‐Doped SrTiO₃ Photocatalyst with Enhanced Dinitrogen Photofixation Performance

et al. 2019

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“…This template-based method 88 has the advantage of precise control over the size, shape and location of the nanostructures, enabling fabrication of NEMS and energy harvesting devices. 196 Other methods such as hydrothermal synthesis, [200][201][202] PLD 203 and AAO template-assisted fabrication 99,102,121,204 have also been used to prepare 3D ferroelectric nanostructures.…”

Section: Fabrication Of Ferroelectric Nanostructuresmentioning

confidence: 99%

“…Other methods such as hydrothermal synthesis, [199][200][201] PLD 202 and AAO template-assisted fabrication 99,102,121,203 have also been used to prepare 3D ferroelectric nanostructures. …”

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confidence: 99%

Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

2013

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Nanostructured materials are central to the evolution of future electronics and information technologies. Ferroelectrics have already been established as a dominant branch in the electronics sector because of their diverse application range such as ferroelectric memories, ferroelectric tunnel junctions, etc. The on-going dimensional downscaling of materials to allow packing of increased numbers of components onto integrated circuits provides the momentum for the evolution of nanostructured ferroelectric materials and devices. Nanoscaling of ferroelectric materials can result in a modification of their functionality, such as phase transition temperature or Curie temperature (TC), domain dynamics, dielectric constant, coercive field, spontaneous polarisation and piezoelectric response. Furthermore, nanoscaling can be used to form high density arrays of monodomain ferroelectric nanostructures, which is desirable for the miniaturisation of memory devices. This review article highlights some research breakthroughs in the fabrication, characterisation and applications of nanoscale ferroelectric materials over the last decade, with priority given to novel synthetic strategies

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“…[11][12][13][14][15][16][17][18] Various other templates have also been used, such as anodized aluminum oxide membranes and patterned TiO2 films for the confined crystallization of perovskite arrays. [19][20][21] Topdown approaches, such as photolithography, e-beam lithography, and atomic force microscopy have been employed. 22,23 Conventional photolithography involves photoresist that is patterned and developed on top of the perovskite layer followed by etching of exposed perovskite thin films.…”

Section: Introductionmentioning

confidence: 99%

Reusable Chemically-Micropatterned Substrates via Sequential Photoinitiated Thiol-Ene Reactions as Template for Perovskite Thin-Film Microarrays

Piecco¹,

Vicente²,

Pyle³

et al. 2019

Preprint

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<p>Patterning semiconducting materials are important for many applications such as microelectronics, displays, and photodetectors. Lead halide perovskites are an emerging class of semiconducting materials that can be patterned via solution-based methods. Here we report an all-benchtop patterning strategy by first generating a patterned surface with contrasting wettabilities to organic solvents that have been used in the perovskite precursor solution then spin-coating the solution onto the patterned surface. The precursor solution only stays in the area with higher affinity (wettability). We applied sequential sunlight-initiated thiol-ene reactions to functionalize (and pattern) both glass and conductive fluorine-doped tin oxide (FTO) transparent glass surfaces. The functionalized surfaces were measured with the solvent contact angles of water and different organic solvents and were further characterized by XPS, selective fluorescence staining, and selective DNA adsorption. By simply spin-coating and baking the perovskite precursor solution on the patterned substrates, we obtained perovskite thin-film microarrays. The spin-coated perovskite arrays were characterized by XRD, AFM, and SEM. We concluded that Patterned substrate prepared via sequential sunlight-initiated thiol-ene click reactions is suitable to fabricate perovskite arrays via the benchtop process. In addition, the same patterned substrates can be reused several times until a favorable perovskite microarray is acquired. Among a few conditions we have tested, DMSO solvent and modified FTO surfaces with alternatively carboxylic acid and alkane is the best combination to obtain high-quality perovskite microarrays. The solvent contact angle of DMSO on carboxylic acid-modified FTO surface is nearly zero and 65±3<sup>o</sup> on octadecane modified FTO surface.</p>

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Fabrication of nanoporous MTiO3 (M = Pb, Ba, Sr) perovskite array films with unprecedented high structural regularity

Cited by 12 publications

References 34 publications

Fabrication of an Fe‐Doped SrTiO₃ Photocatalyst with Enhanced Dinitrogen Photofixation Performance

Fabrication of an Fe‐Doped SrTiO₃ Photocatalyst with Enhanced Dinitrogen Photofixation Performance

Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

Reusable Chemically-Micropatterned Substrates via Sequential Photoinitiated Thiol-Ene Reactions as Template for Perovskite Thin-Film Microarrays

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Fabrication of nanoporous MTiO3 (M = Pb, Ba, Sr) perovskite array films with unprecedented high structural regularity

Cited by 12 publications

References 34 publications

Fabrication of an Fe‐Doped SrTiO3 Photocatalyst with Enhanced Dinitrogen Photofixation Performance

Fabrication of an Fe‐Doped SrTiO3 Photocatalyst with Enhanced Dinitrogen Photofixation Performance

Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

Reusable Chemically-Micropatterned Substrates via Sequential Photoinitiated Thiol-Ene Reactions as Template for Perovskite Thin-Film Microarrays

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Fabrication of an Fe‐Doped SrTiO₃ Photocatalyst with Enhanced Dinitrogen Photofixation Performance

Fabrication of an Fe‐Doped SrTiO₃ Photocatalyst with Enhanced Dinitrogen Photofixation Performance