Structural, Optical and Laser Damage Threshold Studies of 1, 10 Phenanthraline Doped Potassium Penta Borate (KB5) Single Crystals

2012 ◽  
Vol 584 ◽  
pp. 29-32
Author(s):  
K. Prabha ◽  
M. Ramesh Babu ◽  
Pappu Sagayaraj
Keyword(s):  
Grown Crystal ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
Solvent Evaporation Method ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters

We concentrate on the low temperature slow solvent evaporation method and characterization of pure and 1, 10 phenanthraline doped KB5 and describe its potential as a non-linear optical material. The grown crystal has been subjected to single crystal X-ray diffraction analysis to identify the unit cell parameters and crystal system. The presence of carbon, hydrogen and oxygen content were confirmed by CHN analysis. The Kurtz’s-Perry powder SHG efficiency was determined for both pure and 1, 10 phenanthraline doped KB5 crystals as 1.6 and 2.2 times than that of pure KDP. Laser damage threshold studies of the pure and doped KB5 crystals have been found to be Q-Switched Nd-YAG laser.

scholarly journals Growth and Characterization of Non-Linear Optical Single Crystal Guanidinium triscadmium Sulphate Octahydrate

2019 ◽  
Vol 31 (3) ◽  
pp. 661-668
Author(s):  
A. Rajeswari ◽  
P. Murugakoothan
Keyword(s):  
Grown Crystal ◽  
Visible Region ◽  
Damage Threshold ◽  
Hardness Test ◽  
Laser Damage Threshold ◽  
Nonlinear Susceptibility ◽  
X Ray Diffraction ◽  
Cell Parameters ◽  
Evaporation Technique

Semi-organic single crystals of guanidinium tris cadmium sulphate octahydrate (GuCdS) with nonlinear optical properties were successfully grown by slow solvent evaporation technique. The grown crystals were characterised by powder X -ray diffraction analysis to determine the unit cell parameters. The structure of the compound belongs to triclinic crystal system and space group is found to be P1. The grown crystals were subjected to FTIR spectroscopic analysis to confirm the presence of functional groups present in the compound. UV-vis-NIR spectral study suggested that the grown crystal is transparent in the entire visible region, the lower cut off wavelength is 200 nm and the band gap value is estimated to be 6.14 eV. Nonlinear refractive index (n2), absorption coefficient (β) and third order nonlinear susceptibility (χ(3)) were calculated using Z-scan technique. The thermal stability of grown crystal was investigated by thermogravimetric and differential thermogravimetric analyses. The dielectric behaviour of the grown crystal was analyzed as a function of frequency of the applied field. The mechanical properties of grown crystal were examined by Vickers′s micro hardness test. The laser damage threshold of the grown crystal was calculated to be 1.796 GW/cm2.

scholarly journals Purification and X-ray crystallographic analysis of 7-keto-8-aminopelargonic acid (KAPA) synthase fromMycobacterium smegmatis

2014 ◽  
Vol 70 (10) ◽  
pp. 1372-1375 ◽  
Author(s):  
Shanghua Fan ◽  
Defeng Li ◽  
Joy Fleming ◽  
Yuan Hong ◽  
Tao Chen ◽  
...  
Keyword(s):  
Crystallographic Analysis ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Essential Enzyme ◽  
Mycobacterial Growth

7-Keto-8-aminopelargonic acid synthase (KAPA synthase; BioF) is an essential enzyme for mycobacterial growth that catalyses the first committed step in the biotin-synthesis pathway. It is a pyridoxal 5′-phosphate (PLP)-dependent enzyme and is a potential drug target. Here, the cloning, expression, purification and crystallization of KAPA synthase fromMycobacterium smegmatis(MsBioF) and the characterization of MsBioF crystals using X-ray diffraction are described. The crystals diffracted to 2.3 Å resolution and belonged to the monoclinic space groupP21, with unit-cell parametersa= 70.88,b= 91.68,c= 109.84 Å, β = 97.8°. According to the molecular weight of MsBioF, the unit-cell parameters and the self-rotation function map, four molecules are present in each asymmetric unit with aVMvalue of 2.06 Å3 Da−1and a solvent content of 40.20%.

RELATIONSHIP BETWEEN MICRO-STRUCTURE AND LASER DAMAGE THRESHOLD OF NANO-ZrO2 FILMS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 585-587 ◽  
Author(s):  
L. H. DUAN ◽  
A. P. LIU ◽  
S. L. CHEN ◽  
W. L. WANG ◽  
P. MA ◽  
...  
Keyword(s):  
Electron Beams ◽  
Damage Threshold ◽  
Amorphous Structure ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
X Ray Diffraction ◽  
Micro Structure ◽  
Polycrystalline Structure ◽  
Coating Materials ◽  
X Ray

In this paper, the micro-structure and laser damage threshold of nano- ZrO 2 thin films were investigated. High-purity nano- ZrO 2 particles as the coating materials of samples were prepared by the electron beams evaporation. The micro-structure and crystallitic size of samples were analyzed by X-ray diffraction, a laser by 1064nm, 10ns, 3Hz Nd:YAG laser damage test each for nano- ZrO 2 films. The results showed that oxygen partial pressure has an important influence on the micro-structure of nano- ZrO 2 films, also found that the crystallitic size and different micro-structure influenced the laser damage threshold. The obtained results showed that laser damage threshold of polycrystalline structure is obviously higher than that of amorphous structure.

Hydrothermal synthesis and characterization of the praseodymium borate-nitrate Pr[B5O8(OH)(H2O)0.87]NO3·2H2O

2017 ◽  
Vol 72 (9) ◽  
pp. 677-685
Author(s):  
Teresa S. Ortner ◽  
Hubert Huppertz
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
The Novel ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Rare Earth Borate ◽  
Ir And Raman

AbstractThe praseodymium borate-nitrate Pr[B5O8(OH)(H2O)0.87]NO3·2H2O was obtained in a hydrothermal synthesis. It crystallizes monoclinically in the space groupP21/n(no. 14) with four formula units (Z=4) and unit cell parameters ofa=641.9(3),b=1551.8(7),c=1068.4(5) pm, withβ=90.54(2)° yieldingV=1.0643(8) nm3. The defect variant constitutes the missing member in the series of isostructural, early rare earth borate-nitrates of the compositionRE[B5O8(OH)(H2O)x]NO3·2H2O [RE=La (x=0; 1), Ce (x=1), Nd (x=0.85), Sm (x=0)]. In addition to powder and single-crystal X-ray diffraction data, the novel borate-nitrate was characterized through IR and Raman spectroscopy.

Synthesis and characterization of a new trimetallic compound (NH4)Ni2.4Co0.6O(OH)(MoO4)2•1.5H2O

2014 ◽  
Vol 29 (4) ◽  
pp. 379-382 ◽  
Author(s):  
Sandra Amaya ◽  
Johana Arboleda ◽  
Adriana Echavarría
Keyword(s):  
Thermal Analysis ◽  
Laser Raman Spectroscopy ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Laser Raman ◽  
Fourier Transformed Infrared Spectroscopy

A new trimetallic compound with formula (NH4)Ni2.4Co0.6O(OH)(MoO4)2•1.5H2O was obtained by hydrothermal synthesis. The solid was characterized by X-ray diffraction, thermal analysis (thermogravimetric analysis and differential thermal analysis), Fourier-transformed infrared spectroscopy, Laser Raman spectroscopy, and chemical analysis by atomic absorption, confirming the formation of the layered phase ϕy. Crystallographic studies showed that the compound obtained is trigonal with hexagonal unit-cell parameters, a = 6.0468 ± 0.0016 Å and c = 21.8433 ± 0.0001 Å, and space group R-3m.

scholarly journals Synthesis, Crystal Structures and Characterization of Two Nonmetal Cation Tetrafluoroborates

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 812
Author(s):  
Noura Othman Alzamil ◽  
Ghareeba Mussad Al-Enzi ◽  
Aishah Hassan Alamri ◽  
Insaf Abdi ◽  
Amor BenAli
Keyword(s):  
Thermal Analysis ◽  
Hydrofluoric Acid ◽  
Cell Parameter ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Microwave Assisted

Two new nonmetal cation tetrafluoroborate phases [H3tren](BF4)3 (I) and [H3tren](BF4)3 HF (II) were synthesized by microwave-assisted solvothermal and characterized by single crystal X-ray diffraction, IR spectroscopy and thermal analysis DTA-TGA. [H3tren](BF4)3 is cubic (P213) with unit cell parameter a = 11.688(1) Å. [H3tren](BF4)3•HF is trigonal (R3c) with unit cell parameters a = 15.297(6) Å and c = 12.007(2) Å. Both (I) and (II) structures can be described from isolated tetrafluoroborate BF4- anions, triprotonated tris-(2-aminoethyl)amine (tren) [H3tren]3+. Phase (II) contains disordered BF4- tetrahedron and hydrofluoric acid.

Synthesis and Characterization of A2CaCuO5(A=Nd, Sm)

1998 ◽  
Vol 12 (11) ◽  
pp. 427-431
Author(s):  
K. Jeyabalan ◽  
L. K. Kaliyaperumal ◽  
A. Sekar ◽  
J. Srinivas
Keyword(s):  
Diffraction Analysis ◽  
Unit Cell ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Orthorhombic Crystal ◽  
X Ray ◽  
Cell Parameters

Synthesis and characterization of A 2 CaCuO 5( A=Nd, Sm ) system is reported. Powder X-ray diffraction analysis shows that the compounds crystallizes in an orthorhombic crystal systems and the unit cell parameters are found to be a=6.399(9)Å, b=7.218(8) Å and c=12.167(17) Å for Nd 2 CaCuO 5 and a=5.872(8) Å, b=7.457(3) Å and c=12.682(18) Å for Sm 2 CaCuO 5.

Powder X-ray characterization of lithium thiazolidine-4-carboxylate

2009 ◽  
Vol 24 (1) ◽  
pp. 44-47 ◽  
Author(s):  
S. G. Antonio ◽  
C. O. Paiva-Santos ◽  
P. P. Corbi ◽  
A. C. Massabni ◽  
F. C. Andrade
Keyword(s):  
Carboxylic Acid ◽  
Diffraction Data ◽  
Lithium Salt ◽  
Paper Analysis ◽  
Orthorhombic Symmetry ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters

Powder X-ray diffraction studies of a lithium salt of thiazolidine-4-carboxylic acid (Li-TC4) of composition LiC4H6NSO2 are presented in this paper. Analysis of the synchrotron powder X-ray diffraction data showed that the complex has an orthorhombic symmetry with space group P212121. Unit cell parameters after the refinement using the Pawley method are: a=19.4931(3) Å, b=4.947 77(6) Å, c=6.201 64(8) Å, and V=598.051 Å3.

scholarly journals Photoluminescence, laser damage threshold, optical transmittance, FTIR, mechanical, dielectric, thermal and XRD studies on Bis – Glycine hydrochloride single crystal

2016 ◽  
Vol 12 (11) ◽  
pp. 4523-4535
Author(s):  
L. Gobinathan ◽  
K. Boopathy
Keyword(s):  
Single Crystal ◽  
Grown Crystal ◽  
Second Harmonic ◽  
Damage Threshold ◽  
Optical Transmittance ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
Slow Cooling ◽  
Second Harmonic Generation Efficiency ◽  
Cell Parameters

Single crystals of Bis – glycine hydrochloride (BGHC) were grown from aqueous solution by means of slow evaporation and slow cooling techniques. Single crystal XRD study reveals that the grown BGHC crystallizes in orthorhombic system with  space group P212121 and  the obtained unit cell parameters are a = 5.32 Å, b = 8.10 Å and c = 18.01 Å. Powder X – ray diffraction pattern of grown BGHC has been indexed. Functional groups present in the BGHC crystals were identified by FT – IR spectral analysis. The transmission and absorption spectra for the grown BGHC crystal shows that the lower cut off wavelength lies at 235 nm. The photoluminescence spectrum of the grown crystal was recorded. Mechanical hardness of the grown BGHC was determined and Vickers microhardness hardness number was calculated. Laser damage threshold study was carried out for the grown crystal using Nd:YAG laser. The thermal stability of the grown crystal was investigated using thermogravimetric analysis and the grown crystal is thermally stable up to 198 °C. Particle size dependent second harmonic generation efficiency of the grown crystal was examined by Kurtz and Perry powder technique using 1064 nm laser.

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