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Investigation On The Growth And Characterization Of L-Pyro Glutamic Acid Single Crystal
Investigation On The Growth And Characterization Of L-Pyro Glutamic Acid Single Crystal
V. Subhaa, T. Seethalakshmia*, P.Revathib and T.Balakrishnanc
V. Subhaa, T. Seethalakshmia*, P.Revathib and T.Balakrishnanc
a PG & Research Department of Physics, Government Arts College (Autonomous), Karur – 639 005, Tamil
a PG & Research Department of Physics, Government Arts College (Autonomous), Karur – 639 005, Tamil
Nadu, India.
Nadu, India.
b Department of Physics, Jamal Mohamed College (Autonomous), Tiruchirappalli – 620 020, Tamil Nadu,
b Department of Physics, Jamal Mohamed College (Autonomous), Tiruchirappalli – 620 020, Tamil Nadu,
India.
India.
c Crystal Growth Laboratory, PG & Research Department of Physics, Periyar EVR College (Autonomous),
c Crystal Growth Laboratory, PG & Research Department of Physics, Periyar EVR College (Autonomous),
Tiruchirappalli – 620 023, Tamil Nadu, India
Tiruchirappalli – 620 023, Tamil Nadu, India
Article history:
Article history:
Received: 15 November, 2021
Received: 15 November, 2021
Accepted: 16 November, 2021
Accepted: 16 November, 2021
Available Online: 10 March, 2022
Available Online: 10 March, 2022
Corresponding Author:
Corresponding Author:
T. Seethalakshmi
T. Seethalakshmi
V. Subha, T. Seethalakshmi, P. Revathi and T. Balakrishnan are awarded with Marie Curie Research Award- 2022 in Molecular Characterization
V. Subha, T. Seethalakshmi, P. Revathi and T. Balakrishnan are awarded with Marie Curie Research Award- 2022 in Molecular Characterization
Abstract
Abstract
L- Pyro Glutamic acid (LPGA), an organic nonlinear optical crystal was grown by conventional slow evaporation method at ambient temperature. The structural properties of grown crystal have been investigated by single crystal and powder X-ray diffraction studies. The FT-IR and FT-Raman spectrum studies were used to affirm the functional group of the grown crystal. Using UV–VIS–NIR spectrum studies, the lower cut-off wavelength and optical band gap of LPGA were found to be 243nm and 2ev respectively. Mechanical strength was estimated using the Vickers microhardness tester. Thermal analysis indicate that the grown LPGA crystal is stable up to 182°C. The photoluminescence study suggests that the presence of defects in the grown crystal due to increase of Stokes shift and vibrational energy relaxation phenomena. The elemental composition of the grown crystal is confirmed by EDAX studies. Surface morphology of the crystal is analyzed by SEM analysis. The Kurtz powder test shows the second harmonic generation efficiency of LPGA is 0.8% that of KDP crystal. Antibacterial activity was carried out against Gram positive (Streptococcus pyogenes, Staphylococcus aureus) and Gram negative bacterial strains (Pseudomonas aeruginosa, Streptococcus oralis).
L- Pyro Glutamic acid (LPGA), an organic nonlinear optical crystal was grown by conventional slow evaporation method at ambient temperature. The structural properties of grown crystal have been investigated by single crystal and powder X-ray diffraction studies. The FT-IR and FT-Raman spectrum studies were used to affirm the functional group of the grown crystal. Using UV–VIS–NIR spectrum studies, the lower cut-off wavelength and optical band gap of LPGA were found to be 243nm and 2ev respectively. Mechanical strength was estimated using the Vickers microhardness tester. Thermal analysis indicate that the grown LPGA crystal is stable up to 182°C. The photoluminescence study suggests that the presence of defects in the grown crystal due to increase of Stokes shift and vibrational energy relaxation phenomena. The elemental composition of the grown crystal is confirmed by EDAX studies. Surface morphology of the crystal is analyzed by SEM analysis. The Kurtz powder test shows the second harmonic generation efficiency of LPGA is 0.8% that of KDP crystal. Antibacterial activity was carried out against Gram positive (Streptococcus pyogenes, Staphylococcus aureus) and Gram negative bacterial strains (Pseudomonas aeruginosa, Streptococcus oralis).
Keywords:
Keywords:
Solution growth; Powder XRD; Mechanical properties; Dielectric studies; Photoluminescence; SEM and EDAX; Second harmonic generation efficiency; Antibacterial resistance.
Solution growth; Powder XRD; Mechanical properties; Dielectric studies; Photoluminescence; SEM and EDAX; Second harmonic generation efficiency; Antibacterial resistance.
Citation:
Citation:
V. Subha, T. Seethalakshmi, P. Revathi and T. Balakrishnan, 2022. Investigation On The Growth And Characterization Of L-Pyro Glutamic Acid Single Crystal. Turkish Journal of Physics. Photon 102, 120-133
V. Subha, T. Seethalakshmi, P. Revathi and T. Balakrishnan, 2022. Investigation On The Growth And Characterization Of L-Pyro Glutamic Acid Single Crystal. Turkish Journal of Physics. Photon 102, 120-133
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