scholarly journals Linear-nonlinear optical, dielectric and surface microscopic investigation of KH2PO4 crystal to uncover the decisive impact of dopant glycine

2018 ◽  
Vol 36 (4) ◽  
pp. 662-667 ◽  
Author(s):  
Imran Khan ◽  
S. Kalainathan ◽  
M.I. Baig ◽  
Mohd Shkir ◽  
S. Alfaify ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Structural Parameters ◽  
Microscopic Investigation ◽  
X Ray Diffraction ◽  
Kdp Crystal ◽  
Device Applications ◽  
Optical Dielectric ◽  
Evaporation Technique ◽  
The Comparative Study ◽  
The Impact

AbstractPresent investigation has been started to perform the comparative study of pure and glycine doped KH2PO4 (KDP) single crystals grown by most commercial slow solvent evaporation technique. The grown crystals were subjected to single crystal X-ray diffraction analysis to determine their structural parameters. The linear optical studies of pure and glycine doped KDP crystal have been undertaken within 200 nm to 1100 nm wavelength range by means of UV-Vis studies. The enhancement in second harmonic generation (SHG) efficiency of glycine doped KDP crystal has been determined using a standard Kurtz-Perry powder test. The dielectric measurements have been carried out to explore the impact of glycine dopant on dielectric constant and dielectric loss of KDP crystal. The surface growth habitat and etch pit density of glycine doped KDP crystal have been evaluated using the results of microscopic etching studies. In light of obtained results the suitability of glycine doped KDP crystal for device applications has been discussed.

scholarly journals Growth and Characterizations of Organic NLO Imidazolium L-Tartrate (IMLT) Single Crystal

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Hiral Raval ◽  
B. B. Parekh ◽  
K. D. Parikh ◽  
M. J. Joshi
Keyword(s):  
Second Harmonic ◽  
Structural Parameters ◽  
Diffraction Method ◽  
Nir Spectroscopy ◽  
Optical Parameters ◽  
Dielectric Study ◽  
X Ray Diffraction ◽  
Monoclinic Crystal ◽  
Monoclinic Crystal Structure ◽  
Evaporation Technique

Good quality single crystals of organic imidazolium L-Tartrate (IMLT) are grown up from aqueous solution by slow solvent evaporation technique. Various structural parameters and monoclinic crystal structure have been confirmed using powder X-ray diffraction method. The presence of various functional groups has been identified by ATR-FTIR. UV-Vis-NIR spectroscopy has shown more than 60% of optical transparency with the lower UV cutoff at 245nm. The optical band gap value of the material is evaluated to be 4.8 eV. Other optical parameters such as refractive index, optical and electrical conductivity, Urbach energy, extinction coefficient, and optical and electrical susceptibility have been evaluated from transmission spectrum data. The above essential parameters manifest appropriate usage of IMLT as an NLO material. The thermogravimetric analysis indicates high thermal stability of material up to 214°C. Apart from that, the dielectric study at various temperatures confirms decrement of dielectric constant and dielectric loss at higher frequencies. The efficiency of Second Harmonic Generation (SHG) is found to be 3.5 times that of the KDP crystals. A range of analysis suggests suitability and potentiality of IMLT crystal for various optoelectronic applications.

scholarly journals Monoclinic and Orthorhombic NaMnO2 for Secondary Batteries: A Comparative Study

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1230
Author(s):  
Jessica Manzi ◽  
Annalisa Paolone ◽  
Oriele Palumbo ◽  
Domenico Corona ◽  
Arianna Massaro ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Reversible Capacity ◽  
Beta Phase ◽  
X Ray Diffraction ◽  
Positive Electrodes ◽  
Detailed Structural Analysis ◽  
Physico Chemical ◽  
Sodium Batteries ◽  
The Impact ◽  
First Time

In this manuscript, we report a detailed physico-chemical comparison between the α- and β-polymorphs of the NaMnO2 compound, a promising material for application in positive electrodes for secondary aprotic sodium batteries. In particular, the structure and vibrational properties, as well as electrochemical performance in sodium batteries, are compared to highlight differences and similarities. We exploit both laboratory techniques (Raman spectroscopy, electrochemical methods) and synchrotron radiation experiments (Fast-Fourier Transform Infrared spectroscopy, and X-ray diffraction). Notably the vibrational spectra of these phases are here reported for the first time in the literature as well as the detailed structural analysis from diffraction data. DFT+U calculations predict both phases to have similar electronic features, with structural parameters consistent with the experimental counterparts. The experimental evidence of antisite defects in the beta-phase between sodium and manganese ions is noticeable. Both polymorphs have been also tested in aprotic batteries by comparing the impact of different liquid electrolytes on the ability to de-intercalated/intercalate sodium ions. Overall, the monoclinic α-NaMnO2 shows larger reversible capacity exceeding 175 mAhg−1 at 10 mAg−1.

Synthesis, Growth and Characterization of Organic Nonlinear Optical L-Asparagine L-Tartrate Single Crystals

2012 ◽  
Vol 584 ◽  
pp. 13-17 ◽  
Author(s):  
G. Peramaiyan ◽  
P. Pandi ◽  
B.M. Sornamurthy ◽  
R. Mohan Kumar
Keyword(s):  
Nonlinear Optical ◽  
Grown Crystal ◽  
Second Harmonic ◽  
Bulk Single Crystal ◽  
X Ray Diffraction ◽  
Ftir Studies ◽  
Slow Evaporation Technique ◽  
Evaporation Technique ◽  
Generation Test

L-asparagine L-tartrate (LAT), an organic compound has been synthesized from aqueous solution and bulk single crystal has been grown by slow evaporation technique. Powder X-ray diffraction studies confirmed the monoclinic structure of the grown LAT crystal. The presence of functional groups of the grown crystal was identified by FTIR studies. Linear optical property of the grown crystal was studied by UV-Vis spectral analysis. Microhardness studies reveal that the crystal possesses relatively higher hardness compared to other organic nonlinear optical crystals. Dielectric response of the L-asparagine L-tartrate crystal was analyzed for different frequencies at various temperatures. Kurtz-Perry powder second harmonic generation test confirmed the nonlinear optical properties of the as-grown LAT crystal.

scholarly journals Investigation on optical, electrical and etching properties of 2-aminopyridinium 4-aminobenzoate: A phase matchable organic single crystal for optoelectronic device applications

2017 ◽  
Vol 35 (1) ◽  
pp. 126-134 ◽  
Author(s):  
L. Chandra ◽  
J. Chandrasekaran ◽  
K. Perumal ◽  
B. Babu ◽  
V. Jayaramakrishnan
Keyword(s):  
Optoelectronic Device ◽  
Spectroscopic Studies ◽  
Average Particle ◽  
Dielectric Study ◽  
X Ray Diffraction ◽  
Device Applications ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Homo Lumo

AbstractNLO active 2-aminopyridinium 4-aminobenzoate (APAB) single crystals were successfully grown by the standard slow evaporation technique. The crystallinity of the grown crystals was analyzed through X-ray diffraction (XRD) measurements. Fourier transform infrared (FT-IR) spectroscopic studies were also performed for the identification of different modes present in the compound. The UV-Vis absorption and transmittance spectra were recorded for the grown crystal and the optical band gap was calculated. Birefringence and etching studies were also carried out. The dielectric study showed that the dielectric constant decreased with an increase in frequency. The photoconductivity study revealed its positive photoconducting nature. Theoretical HOMO LUMO investigations were also made for the crystal. The relative SHG efficiency of the material was investigated by the Kurtz and Perry powder technique. The phase matching property of the crystal was studied through the SHG dependence of average particle sizes.

scholarly journals Effect of ZnSO4 and MnSO4 on the Growth of Sulphamic Acid Single Crystals

2018 ◽  
Vol 15 (2) ◽  
pp. 151-158 ◽  
Author(s):  
K.G. Anupriya ◽  
P. Hemalatha
Keyword(s):  
Thermogravimetric Analysis ◽  
Single Crystals ◽  
Second Harmonic ◽  
Spectral Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Evaporation Technique ◽  
Differential Thermogravimetric Analysis ◽  
Sulphamic Acid ◽  
Vicker’S Microhardness

Single crystals of Sulphamic Acid doped with Zinc Sulphate and Manganese Sulphate were grown at room temperature using slow evaporation technique. Structural analysis of the grown crystals was done using single crystal X Ray Diffraction and powder X Ray Diffraction studies. Various functional groups seen in the grown crystals are determined using FTIR spectroscopic analysis. The cut-off wavelength of ZnSO4 and MnSO4 doped Sulphamic acid were evaluated by UV-Vis-NIR spectral studies. Thermal behaviour of the grown crystals was identified from Thermogravimetric Analysis (TGA) and Differential Thermogravimetric Analysis (DTA). The mechanical strength and Second harmonic generation of the grown crystals was identified by Vicker’s Microhardness Test and Kurtz powder technique respectively.

scholarly journals Growth, structural and optical properties of novel nonlinear optical potassium phthalate di lithium borate (KPDLiB) single crystals

2020 ◽  
Vol 38 (2) ◽  
pp. 214-218
Author(s):  
K. Mohanraj ◽  
D. Balasubramanian ◽  
N. Jhansi
Keyword(s):  
Single Crystals ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Visible Region ◽  
Fluorescence Emission ◽  
Lithium Borate ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
X Ray ◽  
Evaporation Technique

AbstractNovel nonlinear optical semi-organic, potassium phthalate di lithium borate (KPDLiB) single crystals were successfully grown by the slow solvent evaporation technique. Good crystalline nature and an orthorhombic structure were confirmed by powder X-ray diffraction and single crystal X-ray diffraction studies. The functional groups of KPDLiB were identified using FT-IR spectrum recorded in the range of 4000 cm−1 to 450 cm−1. UV-Vis spectrum showed transmitting ability of the crystals in the entire visible region. The photoluminescence spectrum exhibited good fluorescence emission in a visible region at 384 nm, 416 nm and 578 nm. The second harmonic generation efficiency of the grown crystal was evaluated from Kurtz powder technique.

Optical and SHG Measurements of Aminoacids doped ADP NLO crystals

MRS Advances ◽  
2020 ◽  
Vol 5 (37-38) ◽  
pp. 1955-1963
Author(s):  
R. Ananda Kumari
Keyword(s):  
Second Harmonic ◽  
Visible Region ◽  
Cutoff Wavelength ◽  
X Ray Diffraction ◽  
Transmission Data ◽  
Ftir Spectral Analysis ◽  
Evaporation Technique ◽  
Crystalline Nature ◽  
Good Transparency ◽  
Lower Cutoff

ABSTRACTL-Arginine and L-Alanine aminoacids doped ADP crystals were grown from aqueous solution by slow evaporation technique at constant temperature. The crystalline nature of the grown crystals was confirmed using powder X-ray diffraction technique. The vibrational frequencies of the grown crystals were identified using FTIR spectral analysis. Optical absorption study was carried out and a good transparency in the entire visible region was observed with the lower cutoff wavelength of 308 nm and 318 nm for the L-Alanine & L-Arginine doped crystals respectively. The transmission data has been used to evaluate the optical band gap of L-Alanine and L-Arginine doped ADP crystals and is found tobe 5.023 eV. Second harmonic generation (SHG) studies were performed by the classical Kurtz powder technique using a Nd: YAG laser operating at 1064 nm. The SHG efficiency of doped ADP is found to be higher compared to Pure ADP crystals.

Studies on the Growth Aspects of Thiourea Doped L-Alanine Hydrogenchloride: A Promising NLO Crystal

2012 ◽  
Vol 584 ◽  
pp. 70-73
Author(s):  
P. Malliga ◽  
R. Umamaheshwari ◽  
A. Joseph Arul Pragasam
Keyword(s):  
Second Harmonic ◽  
Optical Transmittance ◽  
Dielectric Measurement ◽  
Infrared Analysis ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
Cell Parameters ◽  
Slow Evaporation Technique ◽  
Evaporation Technique ◽  
Uv Visible

A single crystal of L-alanine hydrogenchloride doped with thiourea has been synthesized and grown successfully by slow evaporation technique at room temperature. The cell parameters were determined by the X-ray diffraction analysis. The UV - visible spectral analysis has been recorded to study the optical transmittance in the range from 200nm to1200nm.The Fourier transform infrared analysis identified various functional groups present in the material.The dielectric measurement was made as function of frequency.HR-SEM studies confirms the inclusion of the dopant thiourea. The second harmonic generation efficiency has been determined by Kurtz powder test.

scholarly journals Growth and Characterization of Anthranilic acid Crystals

2016 ◽  
Vol 12 (11) ◽  
pp. 4480-4487
Author(s):  
S. Dinagaran ◽  
P Srinivasan ◽  
P Srinivasan ◽  
S Vijayakumar ◽  
S Vijayakumar ◽  
...  
Keyword(s):  
Anthranilic Acid ◽  
Grown Crystal ◽  
Second Harmonic ◽  
Hardness Test ◽  
Recrystallization Process ◽  
X Ray Diffraction ◽  
Physical Strength ◽  
Slow Evaporation Technique ◽  
Evaporation Technique

ABSTRACTSingle crystals of Anthranilic acid (AA) have been successfully grown and purity of materials has been increased by repeated recrystallization process. Single crystals have been grown by slow evaporation technique. The grown crystal was characterized by Single crystal X-Ray diffraction, Powder XRD, FTIR, UV-Vis, DTA/TGA, Dielectric studies and SHG respectively. The observed results from various characterization show the suitability of NLO application. The second harmonic generation of the grown crystal was checked using Kurtz and Perry technique. Thermal stability and melting point of the grown crystal were found by thermal analysis. The Physical strength of the grown AA crystal was measured from Vicker’s hardness test. 

scholarly journals Investigations on Growth, Optical and Thermal Properties of Sulphamic Acid Single Crystals

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
D. Jaishree ◽  
G. Kanchana ◽  
R. Kesavasamy
Keyword(s):  
Single Crystals ◽  
Second Harmonic ◽  
Differential Scanning Calorimetric ◽  
X Ray Diffraction ◽  
Dsc Studies ◽  
Slow Evaporation Technique ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Sulphamic Acid ◽  
Ft Raman

Single crystals of sulphamic acid of 11 × 7 × 3 mm3dimension were successfully grown by slow evaporation technique. The crystal structure of grown crystals was confirmed by single crystal X-ray diffraction analysis. The presence of functional groups in the crystal lattice has been qualitatively determined by FT-IR and FT-Raman analyses. Theoretical group factor analysis predicts the possible modes of vibrations. The optical transmission spectroscopy (UV-Vis) clearly evidences the suitability of this material for optical application. The thermal behaviour of the crystal was studied by thermogravimetric (TG) and differential scanning calorimetric (DSC) studies. The nonlinear optical (NLO) characteristic of this material was explored by the second harmonic generation (SHG) conversion efficiency.

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