scholarly journals A UV Transmittable NLO crystal Hydrofluoric Acid Mixed Sulphamic acid (FASA) : Synthesis, Growth and Characterization

2018 ◽  
pp. 259-271
Author(s):  
Y. Samson ◽  
S. Anbarasu ◽  
M. Ambrose Rajkumar ◽  
P. Ajith ◽  
D. Prem Anand
Keyword(s):  
Hydrofluoric Acid ◽  
Mixed Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal System ◽  
Dielectric Polarizability ◽  
Evaporation Technique ◽  
Optical Applications ◽  
Nonlinear Optical Applications ◽  
Sulphamic Acid

A UV transmittable NLO crystal Hydrofluoric acid mixed Sulphamic acid (FASA) was synthesized and explored in aqueous solution by slow solvent evaporation technique at ambient temperature. Centimeter sized 3 × 2.8 × 1 cm3 crystal was harvested in a period of 25-30 days. Single crystal X-ray diffraction data manifest FASA crystallizes in Tetragonal P crystal system with lattice parameters of a = 8.12 Å, b = 8.12 Å, c = 9.29 Å and α=β=γ =90̊. The peaks in powder X-ray diffractogram were indexed corresponding to the (hkl) plane orientations showing the crystalline purity and perfection. FTIR spectrum authenticate the functional groups exist in FASA crystal system. UV-vis-NIR spectrum validated a wide transparency range with short UV cut-off edge closer to 200 nm. FASA endowed with larger dielectric polarizability. Kurtz-Perry powder test flashed the Phase matchable SHG efficiency 0.43 times KDP. Soft nature of FASA suits itself for crystal feasibility. The presence of HF with sulphamic acid delivered a mixed crystal system FASA suitable for UV nonlinear optical applications.

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.

Synthesis, Growth and Optical Studies of Mn: α-LiIO3 Single Crystal

2012 ◽  
Vol 584 ◽  
pp. 3-7 ◽  
Author(s):  
R. Ashok Kumar ◽  
D. Rajan Babu ◽  
R. Ezhil Vizhi ◽  
N. Vijayan ◽  
G. Bhagavannarayana
Keyword(s):  
Single Crystal ◽  
Grown Crystal ◽  
Second Harmonic ◽  
Visible Region ◽  
X Ray Diffraction ◽  
X Ray ◽  
Optical Instruments ◽  
Optical Applications ◽  
Nonlinear Optical Applications ◽  
Mn Doped

Manganese doped alpha-lithium iodate have been synthesized and single crystals have been grown for nonlinear optical applications. The grown crystal has been subjected to single crystal X-ray diffraction to confirm the structure. The crystalline perfection was assessed by high-resolution X- ray diffractometer (HRXRD). Second harmonic generation (SHG) efficiency was found to be 71 times than that of KDP. The UV–Vis-NIR spectroscopic study revealed that the grown crystal has good optical transparency in the visible region clearly indicates that Mn doped α-LiIO3 crystals can be used as window material in optical instruments. Presence of dopant was confirmed by energy-dispersive spectrometry.

scholarly journals Comprehensive Studies on Amino Acid Based Organometallic L-Threoninum Cobalt (Ii) Sulfate (Ltcs) Single Crystal

2021 ◽  
Author(s):  
S V ASHVIN SANTHIA ◽  
B ANEEBA ◽  
S VINU ◽  
R SHEELA CHRISTY
Keyword(s):  
Single Crystal ◽  
Bacterial Infections ◽  
Hard Material ◽  
X Ray Diffraction ◽  
Sulfate Heptahydrate ◽  
X Ray ◽  
Cell Parameters ◽  
Evaporation Technique ◽  
Shg Efficiency ◽  
Optical Applications

Abstract By the most widely used slow evaporation technique at room temperature, L-Threoninum Cobalt (II) Sulfate Heptahydrate (LTCS) materials were grown for various applications. The structure of orthorhombic LTCS was identified by X-Ray Diffraction studies (Powder X-Ray Diffraction and Single crystal X-Ray Diffraction), this analysis has also reported the crystallinity, cell parameters (a = 5.35, b = 7.93, c = 13.71), and space group (non-centrosymmetric) of the grown material. Functional groups were affirmed by FTIR analysis. Optical analysis straightforwardly confirms LTCS crystals has greater optical transparency, and Eg = 5.6 eV demonstrates the appropriateness of prepared crystals to optical applications. The mechanical properties were validated with the aid of Vickers' microhardness measurement and that also suggests LTCS belongs to the class of hard material. In this respect, the SHG efficiency of the LTCS crystal grown is 1.25 times greater than that of the KDP crystal because Co+ ions boost the SHG efficiency of LTCS and it was tested by Kurtz and Perry's technique. Electrical results documented the good conducting properties of LTCS crystal. The LTCS substance used to treat fungal and bacterial infections and this bacterial and fungal destroying property was validated by an antimicrobial assay.

Epitaxial Multilayers of (Sr,Ba)Nb2O6 and Conducting Films on (001) Mgo Substrates

1995 ◽  
Vol 388 ◽  
Author(s):  
T. F. Huang ◽  
K. E. Youden ◽  
S. Schwyn Thöny ◽  
L. Hesselink ◽  
J. S. Harris
Keyword(s):  
Epitaxial Growth ◽  
Nonlinear Optical ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Electro Optic ◽  
Optical Applications ◽  
Nonlinear Optical Applications ◽  
Epitaxial Multilayers

Abstract(Sr,Ba)Nb2O6 (SBN) is a very promising material for nonlinear optical applications because of its high electro-optic and nonlinear optical coefficients. For these applications, SBN requires ferroelectric poling along the optical axis. Conducting layers such as Pt or YBCO must therefore be deposited to provide electrodes above and below the SBN film.We have investigated the epitaxial growth of multilayers of Sr0.61Ba0.39Nb2O6/Pt and Sr0.61Ba0.39Nb2O6/YBCO thin films on (001) MgO substrates by pulsed laser deposition. X-ray diffraction 2θ scans indicate epitaxial growth of SBN/Pt/MgO and SBN/YBCO/MgO heterostructures with their c-axes perpendicular to the substrate plane. X-ray phi scans indicate single crystal Pt and YBCO growth with one in plane orientation. atomic Force Microscopy shows surface roughness of 2.19 nm, and no evidence of particles is observed.

Structural and optical properties of Tin Oxide and Indium doped SnO2 thin films deposited by thermal evaporation technique

2016 ◽  
Vol 12 (3) ◽  
pp. 4394-4399
Author(s):  
Sura Ali Noaman ◽  
Rashid Owaid Kadhim ◽  
Saleem Azara Hussain
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Tin Oxide ◽  
Thermal Evaporation ◽  
Pure Sno2 ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Evaporation Technique ◽  
Sno2 Thin Films

Tin Oxide and Indium doped Tin Oxide (SnO2:In) thin films were deposited on glass and Silicon  substrates  by  thermal evaporation technique.  X-ray diffraction pattern of  pure SnO2 and SnO2:In thin films annealed at 650oC and the results showed  that the structure have tetragonal phase with preferred orientation in (110) plane. AFM studies showed an inhibition of grain growth with increase in indium concentration. SEM studies of pure  SnO2 and  Indium doped tin oxide (SnO2:In) ) thin films showed that the films with regular distribution of particles and they have spherical shape.  Optical properties such as  Transmission , optical band-gap have been measured and calculated.

Effect of trytophan as dopant on potassium acid phthalate single crystals

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Single Crystals ◽  
Room Temperature ◽  
Visible Region ◽  
X Ray Diffraction ◽  
X Ray ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Evaporation Technique ◽  
Potassium Acid Phthalate ◽  
Acid Phthalate

Optically transparent single crystals of potassium acid phthalate (KAP, 0.5 g) 0.05 g and 0.1 g (1 and 2 mol %) trytophan were grown in aqueous solution by slow evaporation technique at room temperature. Single crystal X- ray diffraction analysis confirmed the changes in the lattice parameters of the doped crystals. The presence of functional groups in the crystal lattice has been determined qualitatively by FTIR analysis. Optical absorption studies revealed that the doped crystals possess very low absorption in the entire visible region. The dielectric constant has been studied as a function of frequency for the doped crystals. The thermal stability was evaluated by TG-DSC analysis.

scholarly journals Theoretical and experimental comparative studies of nonlinear optical properties for selected melaminium compounds

2010 ◽  
Vol 8 (6) ◽  
pp. 1192-1202 ◽  
Author(s):  
Marek Drozd ◽  
Mariusz Marchewka
Keyword(s):  
Optical Properties ◽  
Acetic Acid ◽  
Nonlinear Optical ◽  
Time Dependent ◽  
X Ray ◽  
Hartree Fock ◽  
Optical Applications ◽  
Experimental Values ◽  
Nonlinear Optical Applications ◽  
Theoretical Results

AbstractThe bis(melaminium) sulphate dihydrate, 2,4,6-triamine-1,3,5-triazin-1,3-ium tartrate monohydrate, 2,4,6-triamine-1,3,5-triazin-1-ium hydrogenphthalate, 2,4,6-triamine-1,3,5-triazin-1-ium acetate acetic acid solvate monohydrate, 2,4,6-triamine-1,3,5-triazin-1-ium bis(selenate) trihydrate, melaminium diperchlorate hydrate, melaminium bis(trichloroacetate) monohydrate and melaminium bis(4-hydroxybenzenesulphonate) dihydrate were discovered recently as perspective materials for nonlinear optical applications. On the basis of X-ray structures for eight melaminium compounds the time dependent Hartree Fock (TDHF) method was used for calculation of the polarizability, and first and second hyperpolarizability. Detailed directional studies of calculated hyperpolarizability for all investigated melaminium compounds are shown. The theoretical results are compared with experimental values of β.

Characterization of hydrofluoric acid treated Y–Ba–Cu–O oxides

1989 ◽  
Vol 4 (6) ◽  
pp. 1320-1325 ◽  
Author(s):  
Q. X. Jia ◽  
W. A. Anderson
Keyword(s):  
Hydrofluoric Acid ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Surface Passivation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zero Resistance ◽  
Reaction With Water ◽  
Scanning Electron

Effects of hydrofluoric acid (HF) treatment on the properties of Y–Ba–Cu–O oxides were investigated. No obvious etching of bulk Y–Ba–Cu–O and no degradation of zero resistance temperature were observed even though the oxides were placed into 49% HF solution for up to 20 h. Surface passivation of Y–Ba–Cu–O due to HF immersion was verified by subsequent immersion of Y–Ba–Cu–O in water. A thin layer of amorphous fluoride formed on the surface of the Y–Ba–Cu–O during HF treatment, which limited further reaction between Y–Ba–Cu–O and HF, and later reaction with water. Thin film Y–Ba–Cu–O was passivated by HF vapors and showed no degradation in Tc-zero after 30 min immersion in water. The properties of the surface layer of Y–Ba–Cu–O oxide after HF treatment are reported from Auger electron spectroscopy, x-ray diffraction, and scanning electron microscopy studies.

Structural and Optical Characterization of Zinc Telluride Thin Films

2013 ◽  
Vol 665 ◽  
pp. 254-262 ◽  
Author(s):  
J.R. Rathod ◽  
Haresh S. Patel ◽  
K.D. Patel ◽  
V.M. Pathak
Keyword(s):  
Thin Films ◽  
Extinction Coefficient ◽  
Nir Spectroscopy ◽  
Optical Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Evaporation Technique ◽  
Film Form ◽  
Znte Thin Films

Group II-VI compounds have been investigated largely in last two decades due to their interesting optoelectronic properties. ZnTe, a member of this family, possesses a bandgap around 2.26eV. This material is now a day investigated in thin film form due to its potential towards various viable applications. In this paper, the authors report their investigations on the preparation of ZnTe thin films using vacuum evaporation technique and their structural and optical characterizations. The structural characterization, carried out using an X-ray diffraction (XRD) technique shows that ZnTe used in present case possesses a cubic structure. Using the same data, the micro strain and dislocation density were evaluated and found to be around 1.465×10-3lines-m2and 1.639×1015lines/m2respecctively. The optical characterization carried out in UV-VIS-NIR region reveals the fact that band gap of ZnTe is around 2.2eV in present case. In addition to this, it was observed that the value of bandgap decreases as the thickness of films increases. The direct transitions of the carries are involved in ZnTe. Using the data of UV-VIS-NIR spectroscopy, the transmission coefficient and extinction coefficient were also calculated for ZnTe thin films. Besides, the variation of extinction coefficient with wavelength has also been discussed here.

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