Effect of size and composition on the second harmonic generation from lithium niobate powders at different excitation wavelengths

Sánchez‐Dena, Oswaldo; García-Ramírez, E. V.; Fierro-Ruiz, Cesar David; Vigueras-Santiago, Enrique; Farías, Rurik; Reyes‐Esqueda, Jorge‐Alejandro

doi:10.1088/2053-1591/aa62e5

Cited by 15 publications

(10 citation statements)

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“…[ 14,16 ] Furthermore, SHG scales quadratically with the interaction length. This occurs for particle dimensions up to the coherence length, [ 46,48,49 ] which is about 2.5 µm [ 19,50 ] for both types of crystal. However, since the Pb 2 B 5 O 9 Br particles are slightly larger than the Pb 2 B 5 O 9 Cl particles, a larger SHG response is expected.…”

Section: Resultsmentioning

confidence: 99%

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Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb₂B₅O₉X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Tan

Kirbus

Rüsing

et al. 2020

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Optically nonlinear Pb2B5O9X (X = Cl, Br) borate halides are an important group of materials for second harmonic generation (SHG). Additionally, they also possess excellent photocatalytic activity and stability in the process of dechlorination of chlorophenols, which are typical persistent organic pollutants. It would be of great interest to conduct in situ (photo‐) catalysis investigations during the whole photocatalytic process by SHG when considering them as photocatalytic materials. In order to get superior photocatalytic efficiency and maximum surface information, small particles are highly desired. Here, a low‐cost and fast synthesis route that allows growing microcrystalline optically nonlinear Pb2B5O9X borate halides at large quantities is introduced. When applying the ionothermal growth process at temperatures between 130 and 170 °C, microcrystallites with an average size of about 1 µm precipitate with an orthorhombic hilgardite‐like borate halide structure. Thorough examinations using powder X‐ray diffraction and scanning electron microscopy, the Pb2B5O9X microcrystals are indicated to be chemically pure and single‐phased. Besides, the Pb2B5O9X borate halides' SHG efficiencies are confirmed using confocal SHG microscopy. The low‐temperature synthesis route thus makes these borate halides a highly desirable material for surface studies such as monitoring chemical reactions with picosecond time resolution and in situ (photo‐) catalysis investigations.

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Section: Resultsmentioning

confidence: 99%

“…Confocal SHG microscopy [42][43][44][45][46] was employed to investigate the SHG properties of the two Pb 2 B 5 O 9 X compounds both by imaging and spectroscopy. A sketch of the confocal SHG microscopy setup is presented in Figure S1 microcrystallites.…”

Section: Resultsmentioning

confidence: 99%

Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb₂B₅O₉X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Tan

Kirbus

Rüsing

et al. 2020

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“…Given the great variety of physical and chemical properties that can be ascribed to lithium niobate (LiNbO 3 ; LN), it can be classified into several subclasses of materials. Ever since the pioneering work at Bell Laboratories-published in 1966 [1][2][3][4][5]-a myriad of well-known existent and potential applications of this material have been addressed, which are described elsewhere [6][7][8][9][10][11]. Interestingly enough, apart from its structure, the definition or description of LN is given in accordance with the particular property or application to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

et al. 2018

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Changes in structural and magnetic properties have been systematically induced in lithium niobate (LiNbO 3) powders, Fe-doped with different concentrations and thermally treated in oxidized and reduced states. A rather strong ferromagnetic response at room temperature with a saturation magnetization of 0.96 Am 2 kg −1 was obtained for the higher utilized doping concentration, which is of the order of 1% mol. This may be considered a first report of the manifestation of ferromagnetism in nanocrystalline lithium niobate powders within the regime of very low Fe-doping concentrations. Post-thermal treatment in a controlled atmosphere is key for inducing and detecting this behavior, which can also be explained as the effective recombination of Fe impurities with oxygen vacancies in the surface of the material. Mechanochemical-calcination was employed for the synthesis of LiNbO 3 powders and after that, a diffusion process of 0.44%, 0.89%, 1.47% and 2.20% mass of Fe 2 O 3 was used in the Fe-doping. Oxidation and reduction processes were performed using a controlled atmosphere of ultra-high purity oxygen and hydrogen, respectively. X-ray diffraction and Raman spectroscopy were employed to characterize the materials. The magnetic properties were studied using Vibration Sample magnetometry and Electron Spin Resonance spectroscopy.

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“…[13] Thecrystal structures of the isotypic compounds Sr 3.5 [Fe-(CN) 3 ], Ba 3.5 [Ru(CN) 3 ], and Sr 3.5 [Ru(CN) 3 ]w ere refined from synchrotron powder diffraction data and are in good accordance to that of Ba 3.5 [Fe(CN) 3 ]. [13] Second-harmonic (SH) microscopy Confocal second-harmonic (SH) microscopy [14] 2a). In contrast, most of the image remains dark for LiSr 3 [Fe(CN) 3 ]( Figure 2b).…”

Section: Crystal Structuresmentioning

confidence: 99%

Tricyanidoferrates(−IV) and Ruthenates(−IV) with Non‐Innocent Cyanido Ligands

et al. 2021

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Exceptionally electron‐rich, nearly trigonal‐planar tricyanidometalate anions [Fe(CN)3]7− and [Ru(CN)3]7− were stabilized in LiSr3[Fe(CN)3] and AE3.5[M(CN)3] (AE=Sr, Ba; M=Fe, Ru). They are the first examples of group 8 elements with the oxidation state of −IV. Microcrystalline powders were obtained by a solid‐state route, single crystals from alkali metal flux. While LiSr3[Fe(CN)3] crystallizes in P63/m, the polar space group P63 with three‐fold cell volume for AE3.5[M(CN)3] is confirmed by second harmonic generation. X‐ray diffraction, IR and Raman spectroscopy reveal longer C−N distances (124–128 pm) and much lower stretching frequencies (1484–1634 cm−1) than in classical cyanidometalates. Weak C−N bonds in combination with strong M−C π‐bonding is a scheme also known for carbonylmetalates. Instead of the formal notation [Fe−IV(CN−)3]7−, quantum chemical calculations reveal non‐innocent intermediate‐valent CN1.67− ligands and a closed‐shell d10 configuration for Fe, that is, Fe2−.

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Effect of size and composition on the second harmonic generation from lithium niobate powders at different excitation wavelengths

Abstract: This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy. !Effect of size and composition on the second harmonic generati...

Cited by 15 publications

References 15 publications

Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb₂B₅O₉X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb₂B₅O₉X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

Tricyanidoferrates(−IV) and Ruthenates(−IV) with Non‐Innocent Cyanido Ligands

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Effect of size and composition on the second harmonic generation from lithium niobate powders at different excitation wavelengths

Abstract: This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy. !Effect of size and composition on the second harmonic generati...

Cited by 15 publications

References 15 publications

Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

Tricyanidoferrates(−IV) and Ruthenates(−IV) with Non‐Innocent Cyanido Ligands

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Product

Resources

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Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb₂B₅O₉X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation

Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb₂B₅O₉X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation