The role of cations in hydrothermal synthesis of nonlinear optical sodium niobate nanocrystals

Kohlenbach, Nico-Dominik; Kijatkin, Christian; König, Matthias; Haase, Markus; Imlau, Mirco; Kömpe, Karsten

doi:10.1039/d0nr03840g

Cited by 8 publications

(4 citation statements)

References 51 publications

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“…43 In the case of 1, the calculated f R (1500 nm) is 3 × 10 7 . This value is comparable with the values obtained for LiNbO 3 , 44 KNbO 3 , and NaNbO 3 , 45 which are known to be the reference materials in nonlinear optics because of their high nonlinear optical coefficients.…”

Section: T H Isupporting

confidence: 88%

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]

Ghazanfari

Vittadello

Al-Sabbagh

et al. 2022

J. Phys. Chem. Lett.

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The ternary sulfido bismuthate K 3 [BiS 3 ] is synthesized in quantitative yields. The material exhibits nonlinear optical properties with strong second harmonic generation properties at arbitrary wavelengths in the infrared spectral range and a notable laser-induced damage threshold of 5.22 GW cm −2 for pulsed laser radiation at a wavelength of 1040 nm, a pulse duration of 180 fs, and a repetition rate of 12.5 kHz. K 3 [BiS 3 ] indicates semiconductivity with a direct optical band gap of 2.51 eV. Dielectric and impedance characterizations demonstrate κ values in the range of 6−13 at 1 kHz and a high electrical resistivity. A strong diamagnetic behavior with a susceptibility of −2.73 × 10 −4 m 3 kg −1 at room temperature is observed. These results suggest it is a promising nonlinear optical candidate for the infrared region. The synergic physical characteristics of K 3 [BiS 3 ] provide insight into the correlation of optical, electrical, and magnetic properties.

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Section: T H Isupporting

confidence: 88%

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]

Ghazanfari

Vittadello

Al-Sabbagh

et al. 2022

J. Phys. Chem. Lett.

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“…More recently, the hydrothermal synthesis of NaNbO 3 was also reported, starting from NaOH and amorphous or crystallized niobium oxides from different phases. [ 188 ] The resulting particles are slightly polydispersed and aggregated but all present sub‐100 nm crystallite sizes. The formation of the NaNbO 3 phase depends on the crystallinity of the starting material and reveals a formation mechanism based on the migration of the Na + cation within the niobate network.…”

Section: Hydrothermal and Solvothermal Conditionsmentioning

confidence: 99%

Solution‐Based Synthesis Routes for the Preparation of Noncentrosymmetric 0‐D Oxide Nanocrystals with Perovskite and Nonperovskite Structures

Dantelle

Benghia

Dantec

et al. 2022

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With the miniaturization of electronic‐based devices, the foreseen potential of new optical nanoprobes and the assessment of eventual size and shape effects, elaboration of multifunctional noncentrosymmetric nanocrystals with ferroelectric, pyroelectric, piezoelectric, and nonlinear optical properties are the subject of an increasing research interest. Here, the recent achievements from the solution‐based methods (coprecipitation in homogeneous and nanostructured media, sol‐gel processes including various chemistries and hydro/solvothermal techniques) to prepare 0‐D perovskite and nonperovskite oxides in the 5–500 nm size range are critically reviewed. To cover a representative list of covalent‐ and ionic‐type materials, BaTiO3 and its derivatives, niobate compounds (i.e., K/Na/LiNbO3), multiferroic BiFeO3, and crystals of lower symmetry including KTiOPO4 and some iodate compounds such as Fe(IO3)3 and La(IO3)3 are systematically in focus. The resulting size, morphology, and aggregation state are discussed in light of the proposed formation mechanisms. Because of a higher complexity related to their chemical composition and crystalline structures, improving the rational design of these multifunctional oxides in terms of finely‐tuned compositions, crystalline hosts and structure–property relationships still need in the future a special attention of the research community to the detailed understanding of the reaction pathways and crystallization mechanisms.

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“…Sodium and potassium niobate K x Na 1− x NbO 3 (KNN)-based ceramics seem to be the most interesting piezoceramics to replace textured lead-based ones, the standard thanks to their highest piezoelectric features but causing an environmentally negative impact and human health unsafe behavior in use [ 4 , 5 , 6 , 7 , 8 ]. Ceramics based on KNN are secure from an environment point of view and show a promising combination of electro-mechanical properties and thermal stability [ 9 , 10 , 11 , 12 , 13 , 14 ]. However, the processing and sintering of such high-quality ceramics is still a challenge [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…For an efficient heating, microwave system can be used assisting the HT method or for sintering step [ 43 ]. Microwave-assisted hydrothermal synthesis method combines the advantages of high-pressure wet technology of hydrothermal (HT) with microwave (MW) heating system on a previously prepared suspension, which leads to higher compositional and submicron-sized particles homogeneity [ 10 , 46 ]. Microwave radiation was volumetrically absorbed leading to the conversion of electromagnetic energy into heat in the volume of irradiated material due to intermolecular friction and, as a result, diffusion processes were enhanced, energy consumption was reduced, heating rates were very rapid and synthesis times were considerably reduced [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

Alkali Niobate Powder Synthesis Using an Emerging Microwave-Assisted Hydrothermal Method

et al. 2022

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For more than five decades, alkali niobate-based materials (KxNa1-xNbO3) have been one of the most promising lead-free piezoelectric materials researched to be used in electronics, photocatalysis, energy storage/conversion and medical applications, due to their important health and environmentally friendly nature. In this paper, our strategy was to synthetize the nearest reproductible composition to KxNa1-xNbO3 (KNN) with x = 0.5, placed at the limit of the morphotropic phase boundary (MPB) with the presence of both polymorphic phases, orthorhombic and tetragonal. The wet synthesis route was chosen to make the mix crystal powders, starting with the suspension preparation of Nb2O5 powder and KOH and NaOH alkaline solutions. Hydrothermal microwave-assisted maturation (HTMW), following the parameter variation T = 200–250 °C, p = 47–60 bar and dwelling time of 30–90 min, was performed. All powders therefore synthesized were entirely KxN1−xNbO3 solid solutions with x = 0.06–0.69, and the compositional, elemental, structural and morphological characterization highlighted polycrystalline particle assemblage with cubic and prismatic morphology, with sizes between 0.28 nm and 2.95 μm and polymorphic O-T phase coexistence, and a d33 piezoelectric constant under 1 pC/N of the compacted unsintered and unpoled discs were found.

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The role of cations in hydrothermal synthesis of nonlinear optical sodium niobate nanocrystals

Abstract: The usability of the alkali niobates with their ferroelectric and photorefractive properties could be expanded if the development of synthesis methods would allow to obtain small, preferably monodispersed, crystals in...

Cited by 8 publications

References 51 publications

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]

Solution‐Based Synthesis Routes for the Preparation of Noncentrosymmetric 0‐D Oxide Nanocrystals with Perovskite and Nonperovskite Structures

Alkali Niobate Powder Synthesis Using an Emerging Microwave-Assisted Hydrothermal Method

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The role of cations in hydrothermal synthesis of nonlinear optical sodium niobate nanocrystals

Abstract: The usability of the alkali niobates with their ferroelectric and photorefractive properties could be expanded if the development of synthesis methods would allow to obtain small, preferably monodispersed, crystals in...

Cited by 8 publications

References 51 publications

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K3[BiS3]

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K3[BiS3]

Solution‐Based Synthesis Routes for the Preparation of Noncentrosymmetric 0‐D Oxide Nanocrystals with Perovskite and Nonperovskite Structures

Alkali Niobate Powder Synthesis Using an Emerging Microwave-Assisted Hydrothermal Method

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Product

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Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]