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    • Rengasamy Gopalakrishnan
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      Rengasamy Gopalakrishnan

      Rengasamy Gopalakrishnan

      Department of Physics, Anna University, Chennai 600025, India | Crystal Research Lab, Department of Physics, Anna University, Chennai, India | Chennai-600025 | India | Crystal ...

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      Rengasamy Gopalakrishnan:Expert Impact

      Concepts for whichRengasamy Gopalakrishnanhas direct influence:Single crystals,Single crystal,Grown crystal,Grown crystals,Growth characterization,Vertical bridgman technique,Wo3 films,Photochemical deposition.

      Rengasamy Gopalakrishnan:KOL impact

      Concepts related to the work of other authors for whichfor which Rengasamy Gopalakrishnan has influence:Single crystal,Optical properties,Room temperature,Silver nanoparticles,Thermal stability,Xray diffraction,Band gap.

      KOL Resume for Rengasamy Gopalakrishnan

      Year
      2017

      Department of Physics, Anna University, Chennai 600025, India

      2016

      Chennai-600025

      India

      Crystal Research Laboratory

      Anna University

      Department of Physics

      2015

      Crystal Research Laboratory, Department of Physics, Anna University, Chennai-25, India

      2014

      Department of Physics, Anna University, Chennai-600025, India

      2013

      Crystal Research Lab, Department of Physics, Anna University, Chennai, 600 025, India

      2012

      Department of Physics, Anna University-Chennai, Chennai 600025, India

      2011

      Crystal Research Lab, Department of Physics, Anna University, Chennai – 600025, India

      2010

      Crystal Research Lab, Department of Physics, Anna University Chennai, Chennai 600025, India

      2008

      School of Physics, University of Hyderabad, India Department of Physics, Anna University, Chennai-600 025, India

      Anna University.

      2007

      Dept. of Physics, Anna University, Chennai – 600 025, India

      2006

      Materials Characterization Division, National Physical Laboratory, New Delhi - 110 012, India, Department of Physics and Crystal Growth Centre and Department of Chemistry, Anna University, Chennai - 600 025, India

      Department of Physics, Anna University, Chennai 60 025,

      2005

      Department of Physics, Anna University, Chennai—600 025, India

      2004

      Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan, ROC

      2002

      Department of Chemical Engineering, National Taiwan University, 10617 Taipei, Taiwan, ROC

      2001

      Department of Physics, Anna University, Chennai- 600 025, India

      2000

      Electrotechnical Laboratory, 1-1-4, Umezono Tsukuba, Ibaraki-305-8568, Japan

      1996

      Department of Physics Anna University Madras 600025, India

      1994

      Crystal Growth Centre, Anna University, Madras-600 025, India

      1993

      Crystal Growth Centre, Anna University, 600 025, Madras, India

      1991

      Crystal Growth Centre, Anna University, Madras ‐ 600025, India

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      Sample of concepts for which Rengasamy Gopalakrishnan is among the top experts in the world.
      Concept World rank
      pbh kurtz #1
      films photochemical deposition #1
      behaviour title #1
      hyperpolarizability study lasp #1
      ethanol grown crystals #1
      ssdh increases irradiation #1
      m2a5b #1
      2misa #1
      modifications 70mev li3 #1
      hyperpolarizability studies largininium4nitro #1
      picrate lasp #1
      positive photoconductivity llpnp #1
      largininium4nitro #1
      lsmehcl #1
      behaviour single crystal #1
      microstructure cis #1
      nbs nbromosuccinimide #1
      characterization sodium pentaborate #1
      brewsters angle method #1
      chalcone based materials #1
      –ramasamy method characterization #1
      imilt crystals #1
      deposited films xrd #1
      010 planes nlo #1
      lasp fourier #1
      uvvis molecular properties #1
      amt crystal #1
      lvalinium picrate report #1
      hexagonal phase xrd #1
      dmaphb #1
      sankaranarayananramasamy time #1
      b3lyp hf6 #1
      picrate organic #1
      ultraviolet spectroscopy tgdta #1
      dft b3lyp kurtz–perry #1
      crystals winxmorph #1
      78 transmittance #1
      powder xray vickers #1
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      Prominent publications by Rengasamy Gopalakrishnan

      KOL-Index: 8123

      Electrochromic thin films of tungsten oxide (WO3) were prepared on transparent conducting oxide substrates, i.e., fluorine doped tin oxide coated (FTO or SnO2:F) glass and microscopic glass substrates by the electron beam evaporation technique using pure WO3 (99.99%) pellets at various substrate temperatures (i.e., Tsub = room temperature (RT, 30 °C), 100 °C and 200 °C). The films were prepared under vacuum of the order of 1 × 10−5 mbar. The room temperature prepared films were further ...

      Known for Wo3 Films | Tungsten Oxide | Substrate Temperatures | Electrochromic Devices | Ray Photoelectron
      KOL-Index: 8060

      Nowadays more attention has been paid to the growth of organic nonlinear optical single crystals due to their high nonlinear optical efficiency and fairly good optical damage threshold comparable to that of inorganic counterparts. The organic nonlinear optical single crystals of benzimidazole (BMZ) grown by the slow evaporation solution growth technique (SEST) and the vertical Bridgman technique (VBT) were characterized, and their results have been compared. Characterization has been ...

      Known for Damage Threshold | Single Crystals | Crystal Growth | Ray Diffractometry | Mechanical Behavior
      KOL-Index: 8020

      Electrochromic molybdenum oxide (MoO3) thin films were prepared by electron beam evaporation technique using the dry MoO3 pellets. The films were deposited on glass and fluorine doped tin oxide (SnO2:F or FTO) coated glass substrates at different substrate temperatures like room temperature (RT, 30°C), 100°C and 200°C. The influence of substrate temperature on the structural, surface morphological and optical properties of the films has been studied. The X-ray diffraction analysis showed ...

      Known for Substrate Temperature | Electron Beam | Moo3 Films | Band Gap | Layered Structure
      KOL-Index: 7958

      Development of green route for the synthesis of nanoparticles with plant extracts plays a very important role in nanotechnology without any toxicity chemicals. Herein we report a new approach to synthesize silver nanoparticles (AgNPs) using aqueous extract of Alpinia calcarata root as a reducing as well as stabilizing agent. The crystal structure and purity of the synthesized AgNPs were studied using Powder X-ray Diffraction analysis. The Surface Plasmon Resonance bands of synthesized ...

      Known for Silver Nanoparticles | Green Approach | Alpinia Calcarata | Synthesized Agnps | Antimicrobial Activity
      KOL-Index: 7839

      Cu doped ZnO (Zn1−xCuxO, x=0, 0.02, 0.04 and 0.06) nanopowders have been synthesized by co-precipitation method and annealed at 500°C for 2h under Ar atmosphere. The synthesized samples have been characterized by powder X-ray diffraction, energy-dispersive analysis X-ray (EDAX) spectra, UV–Visible spectrophotometer and Fourier transform infrared (FTIR) spectroscopy. The XRD measurement reveals that the prepared nanoparticles have different microstructure without changing a hexagonal ...

      Known for Zno Nanopowders | Precipitation Method | Ftir Spectra | Zn1−xcuxo X0 | Lattice Parameters
      KOL-Index: 7304

      The synthesis, growth and structure of a novel organic third order nonlinear optical (NLO) crystal namely,

      N

      ,

      N

      ,

      N

      ′,

      N

      ′-tetramethylethylenediammonium-bis(4-nitrophenolate) (TMEDA4NP) is presented.

      The synthesis, growth and structure of a novel organic third order ...

      Known for Crystal Growth | Molecular Structure | Title Compound | Nlo Applications | Slow Evaporation Technique
      KOL-Index: 7104

      Mechanosynthesis of nanocrystalline powders of CZTS and CZTSe by ball milling technique and the physical properties of thermally evaporated CZTS and CZTSe thin films as a function of substrate temperature are investigated. Nanocrystalline Cu–Zn–Tin–Sulphide (CZTS) and Cu–Zn–Tin–Selenide (CZTSe) powders synthesized by ball milling at different milling time using the source materials of Cu, Zn, Sn, S (or) Se in the ratio 2:1:1:4 are investigated. The above synthesized powder was thermally ...

      Known for Cztse Films | Solar Cell Applications | Substrate Temperature | Ball Milling | Physical Properties
      KOL-Index: 6770

      Bulk single crystals of pure and metal ions (Mn(2+), Cu(2+) and Ni(2+)) doped sulphamic acid (SA) have been grown by conventional and unidirectional solution growth methods. Intensities of powder X-ray diffraction peaks of metal ions doped SA reveal that these dopants enhanced the crystallanity. The peak broadening and intensity variation in some frequency regions in FT-IR spectra show the incorporation of dopants in the SA lattice. Mn(2+) and Cu(2+) doped SA single crystals show high ...

      Known for Single Crystals | Sulphamic Acid | Crystalline Perfection | Optical Properties | Surface Morphology
      KOL-Index: 6432

      Chalcone based materials are widely used in many industrial applications. The two new similar chalcone based single crystals, namely (E)-3-(4-(benzyloxy)phenyl)-1-(4-hydroxyphenyl)prop-2-en-1-one (Crystal A) and (E)-1-(4-(benzyloxy)phenyl)-3-(4-hydroxyphenyl)prop-2-en-1-one (Crystal B) were synthesized and grown as single crystals by slow evaporation solution growth technique in acetone. The structures of the grown crystals were solved and refined by single crystal XRD and this ...

      Known for Single Crystal | Harmonic Generation | Monoclinic Space | Density Functional Theory | Chalcone Based Materials
      KOL-Index: 6308

      Single crystals of α- and γ-glycine were grown by the slow evaporation solution growth method using deionised water as solvent. The α-glycine was transformed to γ-glycine by addition of KNO3 as additive and both the forms of glycine single crystals were grown and the characteristic properties were studied and compared. From the single crystal XRD analysis the grown α- and γ-glycine crystals are confirmed. The presence of the functional groups of α- and γ-glycine was analyzed from the ...

      Known for Single Crystals | Γ Glycine | Growth Characterization | Dielectric Studies | Presence Functional Groups
      KOL-Index: 6263

      CdSe thin films were deposited on the glass substrates by chemical bath deposition method at 80°C using cadmium acetate and sodium selenosulphate as source materials and ethylene diamine tetra acetic acid (EDTA) as a chelating agent with concentrations 0.025, 0.075 and 0.1M. The various preparative parameters such as composition, solution temperature, pH of the solution and deposition time were optimized for depositing good quality CdSe films. The deposited CdSe thin films are annealed ...

      Known for Chemical Bath Deposition | Cdse Films | Optical Properties | Cadmium Selenide | Glass Substrates
      KOL-Index: 6055

      In this work, we have successfully synthesized highly biocompatible and functionalized Dioscorea alata (D. alata) mediated silver nanoparticles with different quantities of its extract for the evaluation of proficient bactericidal activity and optical limiting behavior. The crystalline nature of the synthesized silver nanoparticles was confirmed by powder X-ray powder diffraction (XRD) analysis and furthermore confirmed from SAED pattern of HRTEM Analysis. The Surface Plasmon Resonance ...

      Known for Silver Nanoparticles | Dioscorea Alata | Antibacterial Activities | Green Approach | Optical Limiting Behavior
      KOL-Index: 5724

      In this paper, we report the substrate temperature induced changes in physical properties of thermal evaporated lead selenide (PbSe) thin films from the chemically synthesized nanocrystalline PbSe powders. As the first step, nanocrystalline lead selenide was synthesized by simple chemical method at 80°C using lead nitrate [Pb(NO3)2] and sodium selenosulphate [Na2SeSO3] in the aqueous alkaline media. Ethylene Diamine Tetra acetic acid (0.1M) was used as a complexing agent to form stable ...

      Known for Lead Selenide | Substrate Temperature | Electrical Properties | Deposited Films | Surface Morphology
      KOL-Index: 5539

      A new semiorganic material of l-alanine sodium nitrate (LASN) has been synthesized and successfully grown by the slow evaporation solution growth method. The grown crystals have been subjected to various characterization techniques such as single crystal X-ray diffraction studies, FT-IR and laser Raman analyses to determine the crystal structure and functional groups, respectively. Crystalline perfection of the grown crystal was analyzed by the high resolution X-ray diffraction technique ...

      Known for Grown Crystal | Sodium Nitrate | New Semiorganic | Nonlinear Optical | Thermal Stability
      KOL-Index: 5517

      Nanocrystalline compound semiconductor Cadmium Selenide was synthesized by the solvothermal method using Cd(NO3)2.4H2O and Se metal granules. The synthesized nanocrystalline CdSe particles were subjected to vacuum annealing at 450°C to maintain the hexagonal phase. The as synthesized and annealed powders were analyzed using XRD, SEM, EDX and DTA. The X-ray diffraction pattern of the as synthesized powder shows cubic phase, whereas the 450°C annealed CdSe powder exhibits hexagonal phase. ...

      Known for Cadmium Selenide | Thermal Evaporation Technique | Cdse Films | Hexagonal Phase | Substrate Temperature

      Key People For Single Crystals

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      Department of Physics, Anna University, Chennai 600025, India | Crystal Research Lab, Department of Physics, Anna University, Chennai, India | Chennai-600025 | India | Crystal Research Laboratory

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