Mechanical Studies of Nonlinear Optical γ-Glycine Single Crystal Grown in the Presence of Lithium Nitrate

2012 ◽  
Vol 584 ◽  
pp. 145-149
Author(s):  
M. Vijayalakshmi ◽  
C. Yogambal ◽  
D. Rajan Babu ◽  
R. Ezhil Vizhi
Keyword(s):  
Single Crystal ◽  
Visible Region ◽  
Hardness Test ◽  
Elastic Stiffness ◽  
Lithium Nitrate ◽  
X Ray Diffraction ◽  
Elastic Stiffness Constant ◽  
Stiffness Constant ◽  
Crystalline Nature ◽  
Uv Visible

Single Crystal of γ-glycine lithium nitrate with non-linear optical material have been grown by slow evaporation method at room temperature. Structural and Crystalline nature of the grown γ-glycine lithium nitrate crystal was confirmed by powder X-ray diffraction technique. UV-Visible transmittance study was performed to analyze optical transparency of γ-glycine crystal and found that the crystal was transparent in the entire visible region. The mechanical properties of the grown crystal was subjected to Vickers hardness test and the Brittleness index (Bi), Fracture toughness (Kc), Elastic stiffness constant (C11) were estimated.

scholarly journals Investigation on Chemical, Physical and Biological Assets of a Pioneering biomolecule: (2e)-3-(4-Hydroxy-3-Ethoxyphenyl)-1-(4-Hydroxyphenyl) Prop-2-En-1-One

2020 ◽  
pp. 19-34
Author(s):  
R. Vasanthi ◽  
D. Reuben Jonathan ◽  
S. Sathya ◽  
B. K. Revathi ◽  
G. Usha
Keyword(s):  
Spectral Study ◽  
Light Emission ◽  
Antioxidant Activities ◽  
Three Dimensional ◽  
Visible Region ◽  
Hardness Test ◽  
Elastic Stiffness ◽  
Orthorhombic Crystal ◽  
Elastic Stiffness Constant ◽  
Stiffness Constant

A chalcone derivative, (2E)-3-(4-hydroxy-3-ethoxyphenyl)-1-(4-hydroxyphenyl)prop-2-en-1-one (HEHP), C17 H16 O4, has been synthesized from the mixture of 4-hydroxyacetophenone (0.05mol) and 4-hydroxy-3-ethoxybenzaldehyde (0.05mol) and by following Claisen-Schmidt reaction mechanism. Three-dimensional molecular structure, orthorhombic crystal system, and Pbca space group for the title compound were elucidated via single crystal XRD spectral study. The appearance of the vibration and absorptions for functional groups were identified using the FT-IR spectrum. 1H and 13CNMR spectra were recorded to recognize the number of unique protons and carbon environments and the best estimation of functionality based on shielding/ deshielding effects. The UV-Visible spectral study gives assistance to appreciate the absorbance and transmittance capabilities of the title molecule while Photoluminescence (PL) spectrum of the compound indicates the blue light emission in the visible region. Information regarding the endothermic and exothermic processes correlated with the sample was obtained from TG/DTA thermal analysis and the material was found to be stable up to 216°C. Mechanical properties such as the Hardness (HV), Meyer's index (n), Newtonian resistance pressure (W), load independent constant (b) and elastic stiffness constant (Cij) were calculated by performing a Vickers hardness test on the compound and they demonstrate excellent mechanical power. The as-synthesized molecule has been screened for its antibacterial, antifungal, and antioxidant activities and observed to exhibit promising activity against various microorganisms

scholarly journals Structural and mechanical properties of diglycine perchlorate single crystals

2018 ◽  
Vol 36 (4) ◽  
pp. 733-738 ◽  
Author(s):  
M. Suresh Kumar ◽  
K. Rajesh ◽  
G.V. Vijayaraghavan ◽  
S. Krishnan
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Single Crystals ◽  
Elastic Stiffness ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters ◽  
Stiffness Constant ◽  
Vicker’S Microhardness

AbstractGood quality diglycine perchlorate (DGPCL) single crystals were grown by slow evaporation solution growth method using the combination of glycine and perchloric acid in the ratio of 2:1. Single crystal X-ray diffraction and mechanical characterization of the grown single crystals of diglycine perchlorate were analyzed in this article. Lattice parameters, space group and crytal system were found from single crystal X-ray diffraction analysis. All the cell parameters and space group are in a good agreement with the reported values. Mechanical properties, such as Vicker’s microhardness number, work hardening index, standard hardness value, yield strength, fracture toughness, brittleness index and elastic stiffness constant values, were determined using Vicker’s microhardness tester.

scholarly journals Synthesis, Growth, Optical, Structural and Mechanical Characterization of SPNP and KPNP Single Crystal using Ethanol as a Solvent

2019 ◽  
Vol 8 (4) ◽  
pp. 7782-7785
Keyword(s):  
Single Crystal ◽  
Mechanical Stability ◽  
Green Light ◽  
Hardness Test ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Window ◽  
Uv Visible ◽  
Vicker’S Microhardness

Single crystals of sodium para nitro phenol (SPNP) and potassium para nitro phenol (KPNP) was synthesized at room temperature by slow evaporation solution growth technique using ethanol as a solvent upto the size of 12 × 3 × 2 mm3 and 15 × 2 × 2 mm3 respectively. The grown crystals were characterized by UV- Visible, photoluminescence, Kurtz- Perry test, single crystal X-ray diffraction analysis and Vicker’s microhardness studies. Structural identification of grown crystals was done by single crystal X-ray diffraction and it shows both the crystals are belongs to triclinic crystal system. The SPNP and KPNP crystal emits green light radiation as evident from the PL measurement. The UV -Visible study revealed that the grown crystal has high transmission window with cut off wavelength of 207 nm and 208 nm respectively. And also the direct optical band gap was estimated to be 3.23 eV and 3.20 eV using Tauc’s plot. The SHG output of grown crystals was recorded by Kurtz Perry technique and it is found to be nearly five times greater than the reference KDP. The Vickers hardness test confirms the mechanical stability of the material.

scholarly journals Measurement Modulus of Elasticity Related to the Atomic Density of Planes in Unit Cell of Crystal Lattices

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4380 ◽  
Author(s):  
Marzieh Rabiei ◽  
Arvydas Palevicius ◽  
Amir Dashti ◽  
Sohrab Nasiri ◽  
Ahmad Monshi ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Elastic Stiffness ◽  
New Method ◽  
X Ray Diffraction ◽  
Crystal Lattices ◽  
Crystalline Materials ◽  
X Ray ◽  
Elastic Stiffness Constant ◽  
Stiffness Constant

Young’s modulus (E) is one of the most important parameters in the mechanical properties of solid materials. Young’s modulus is proportional to the stress and strain values. There are several experimental and theoretical methods for gaining Young’s modulus values, such as stress–strain curves in compression and tensile tests, electromagnetic-acoustic resonance, ultrasonic pulse echo and density functional theory (DFT) in different basis sets. Apparently, preparing specimens for measuring Young’s modulus through the experimental methods is not convenient and it is time-consuming. In addition, for calculating Young’s modulus values by software, presumptions of data and structures are needed. Therefore, this new method for gaining the Young’s modulus values of crystalline materials is presented. Herein, the new method for calculating Young’s modulus of crystalline materials is extracted by X-ray diffraction. In this study, Young’s modulus values were gained through the arbitrary planes such as random (hkl) in the research. In this study, calculation of Young’s modulus through the relationship between elastic compliances, geometry of the crystal lattice and the planar density of each plane is obtained by X-ray diffraction. Sodium chloride (NaCl) with crystal lattices of FCC was selected as the example. The X-ray diffraction, elastic stiffness constant and elastic compliances values have been chosen by the X’Pert software, literature and experimental measurements, respectively. The elastic stiffness constant and Young’s modulus of NaCl were measured by the ultrasonic technique and, finally, the results were in good agreement with the new method of this study. The aim of the modified Williamson–Hall (W–H) method in the uniform stress deformation model (USDM) utilized in this paper is to provide a new approach of using the W–H equation, so that a least squares technique can be applied to minimize the sources of errors.

scholarly journals Piperazine based Zirconium Oxy-Chloride (PzZrOCl) single crystal: A Third Order Nonlinear Optical material for Opto-electronic Device Applications

2021 ◽  
Author(s):  
Mullai R U ◽  
Sreenadha Rao Kanuru ◽  
R. Arul Jothi ◽  
E. Vinoth ◽  
S. Gopinath ◽  
...  
Keyword(s):  
Single Crystals ◽  
Electronic Device ◽  
Green Emission ◽  
Elastic Stiffness ◽  
Visible Range ◽  
Elastic Stiffness Constant ◽  
Stiffness Constant ◽  
Device Applications ◽  
Evaporation Technique ◽  
Laser Induced Damage

Abstract Single crystals of Piperazine Zirconium Oxy-Chloride (PzZrOCl) are grown successfully by slow evaporation technique for Opto-electronic device applications. Suitability of the material is estimated and reported as follows. Crystal habits, purity, crystallite size, microstructure and bulk crystals structures are essential parameters for device compatibility hence they were examined with basic characterization techniques and studied to estimate their effects on optoelectronic properties. The outcomes from structural aspects are reasonably good. The functional groups of a molecule, their bond vibration frequencies and mode of alignments have been examined by Fourier Transform Infrared spectroscopy (FT-IR). The transmittance (98%) in the entire visible range with lowest cut-off wavelength (215 nm) and green emission (545 nm) is another evidence of suitability. The thermal and mechanical strength via hardness, Mayer index, yield strength and elastic stiffness constant is evaluated; it is thermally stable up to 162°C, mechanically strong and belongs to soft category. Laser induced damage is estimated by using Nd:YAG laser of wavelength 1064 nm and the observed values is three times higher than KDP, 1.2 times higher than LAPP. The optical nonlinear nature and its efficiency are examined by using Z-scan technique. The analysis discussed in detailed and the results strongly recommends PzZrOCl single crystals are suitable for optical and electronic device applications.

scholarly journals Preparation of Fe-DopedTiO2Nanotubes and Their Photocatalytic Activities under Visible Light

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Honghui Teng ◽  
Shukun Xu ◽  
Dandan Sun ◽  
Ying Zhang
Keyword(s):  
Visible Light ◽  
Visible Region ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Photocatalytic Activities ◽  
Ultrasonic Assisted ◽  
Uv Visible

Fe-doped TiO2nanotubes (Fe-TNTs) have been prepared by ultrasonic-assisted hydrothermal method. The structure and composition of the as-prepared TiO2nanotubes were characterized by transmission electron microscopy, X-ray diffraction, and UV-Visible absorption spectroscopy. Their photocatalytic activities were evaluated by the degradation of MO under visible light. The UV-visible absorption spectra of the Fe-TNT showed a red shift and an enhancement of the absorption in the visible region compared to the pure TNT. The Fe-TNTs were provided with good photocatalytic activities and photostability and under visible light irradiation, and the optimum molar ratio of Ti : Fe was found to be 100 : 1 in our experiments.

Synthesis, growth mechanism and physical properties of vapour-deposited GaTe platelets

2014 ◽  
Vol 47 (6) ◽  
pp. 1841-1848 ◽  
Author(s):  
A. G. Kunjomana ◽  
M. Teena ◽  
K. A. Chandrasekharan
Keyword(s):  
Physical Properties ◽  
Growth Mechanism ◽  
Energy Gap ◽  
Radiation Detector ◽  
Elastic Stiffness ◽  
Scanning Electron Micrographs ◽  
Conductivity Type ◽  
Elastic Stiffness Constant ◽  
Stiffness Constant ◽  
Gallium Telluride

The physical vapour deposition (PVD) method has been employed to yield gallium telluride (GaTe) platelets. The morphology and growth mechanism of these platelets were investigated with the aid of scanning electron micrographs. The stoichiometry and homogeneity of the grown samples were confirmed by chemical analysis. The X-ray diffraction (XRD) technique has been used to explore the structure and phase of the compound. On the basis of the Archimedes principle, the density of crystals was estimated to be 5.442 kg mm−3. The resistivity and conductivity type were determined by the van der Pauw method. UV–vis–NIR studies revealed a direct transition with an energy gap of 1.69 eV. Mechanical properties such as microhardness, toughness, Young's modulus and elastic stiffness constant of GaTe crystals in response to the stress field due to an external load were studied to realize their suitability for radiation detector applications. The present observations provide an insight into the physical properties of the vapour-grown GaTe platelets, which are found to be superior over their melt counterparts.

Growth and Magneto-Optical Properties of CaTbAlO4 Crystal

2011 ◽  
Vol 306-307 ◽  
pp. 1722-1727 ◽  
Author(s):  
Man Mei ◽  
Li Li Cao ◽  
Yan He ◽  
Ru Ru Zhang ◽  
Fei Yun Guo ◽  
...  
Keyword(s):  
Optical Properties ◽  
Single Crystal ◽  
Room Temperature ◽  
Near Infrared ◽  
Visible Region ◽  
Czochralski Method ◽  
Optical Devices ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infrared Spectral

The calcium terbium aluminate (CaTbAlO4) single crystal was grown by Czochralski method successfully for the first time.The structure of the crystal was determined by X-ray diffraction analysis.The transmission spectrum of the crystal was measured at room temperature at the wavelength of 400-1500nm.The specific Faraday rotation of the single crystal was surveyed at room temperature at the wavelength 532nm, 633nm, and 1064nm respectively.The Verdet constants of the CaTbAlO4 crystal are calculated and the results show that the Verdet constants of CaTbAlO4 are around 110% higher than that of TGG in the visible and near-infrared spectral region.Therefore,crystal CaTbAlO4 can be promising material for the fabrication of magneto-optical devices in the visible region.

Photoreactive Carbon and Nitrogen-Codoped ZnWO4 Nanoparticles: Synthesis and Reactivity

2012 ◽  
Vol 621 ◽  
pp. 172-177 ◽  
Author(s):  
Su Hua Chen ◽  
Bi Xuan Wang ◽  
Xian Hua Qiu ◽  
Zhen Sheng Xiong
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Region ◽  
Weight Ratio ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Carbon And Nitrogen ◽  
Uv Visible

In order to improve ZnWO4 photocatalytic activity under visible light, the C, N-codoped ZnWO4 nanoparticles have been successfully synthesized by choosing C3N4 generated from tripolycyanamide pyrolysis as the source of Carbon and Nitrogen and the influence of C3N4 concentration on structural, optical and morphological properties of C, N-codoped ZnWO4 using X-ray diffraction (XRD), UV-visible spectroscopy, scanning electron microscopy (SEM) and photocatalytic decoloration of rhodamine B (RhB) aqueous solution under visible light. It was found that the presence of carbon and nitrogen could not improve the crystallization of ZnWO4 species but could enhance their photoabsorption property in the visible region. The results also showed that the photocatalytic activity of the as-prepared ZnWO4 is higher than that of pure ZnWO4 with the optimum effect occurring at RC3N4 = 9 % (the weight ratio of tripolycyanamide to ZnWO4)

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