Page 27 - CFM_Newsletter_CY22

Material Research Club

To encourage and develop the research culture, we provide a forum for our scholars to discuss their
research proposals and output. A bi-weekly meeting allows every scholar to present their research interest.
All the presenters were suggested by faculty and colleagues to improve research quality. In addition, this
club helped enhance the scholars' understanding, presentation, and communication skills to meet future
challenges. Below is the list of scholars with their presentation topics.

Investigation on Nucleation Kinetics, growth and Characterization of Urea Phthalic Acid and Urea Adipic
Acid third order NLO single crystals

Ms. R. Dhivya (11PHD0104), Research Scholar, VIT, Vellore, February 16 .
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The discussion was about Nucleation and growth kinetics which gives information about the crystal growth
process, which can further be utilized in the growth of large-size crystals. Urea phthalic acid and Urea adipic
acid was synthesized by slow evaporation method. Solubility was analyzed gravimetrically, and it is
observed that it exhibits positive temperature coefficient of solubility which is suitable for bulk growth.
Metastable zone width and induction period was observed. UPA was synthesized and subsequently grown
by slow cooling technique. The crystal system and lattice parameters were confirmed by single X-ray
diffraction analysis. Fourier transform infrared analysis was performed to identify the functional groups.

Cross-Linked PVA-CA Polymer Electrolyte for Proton Conducting Fuel Cell Applications

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Ms. S. Gurulakshmi (12PHD0243), Research Scholar, VIT, Vellore, March 23 .
The talk was focused on the fabrication and ionic conduction of PVA-CA-NH S4SCN polymer electrolyte
membranes modified by Glutaraldehyde as a cross-linker has been discussed. In order to study the effect
of cross-linker, membranes with different glutaraldehyde content have been prepared by the solution
casting method, The properties of these membranes were studied in detail by FT-IR, TGA. DSC, XRD. UTM
and AC impedance analysis. The peak performance observed from the single Fuel cell assembly for our
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membrane PVA/CA/NH4SCN/4%GA is 0.24 mW/cm and a current density of 15 mA/cm . The cross-linked
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membrane displays good mechanical stability, and insolubility along with desirable proton conduction which
suggests these membranes are suitable for electrochemical applications.
Structural, Optical, Mechanical, Dielectric and Nonlinear Optical studies of Rubidium Hydrogen Oxalate
Dihydrate (RbC4 H7 O10) single crystal

Ms. D. S. Ajisha (15PHD0156), Research Scholar, VIT, Vellore, March 30 .
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The talk by Ms D.S. Ajisha was about transparent Rubidium hydrogen oxalate dihydrate (RbHOH) single
crystal which was synthesized by adopting the slow solvent evaporation method. RbHOH crystallizes in the
triclinic structure with the P1 ̅ space group. The characteristic FTIR spectrum reflects the vibrational modes
of water molecules and hydroxyl groups present in the material. From the absorption spectrum, the lower
cutoff wavelength of RbHOH was observed at 260 nm with an energy gap of 4.7eV. From TG/DSC, the
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thermal stability of RbHOH was found to be around 91 C. The normal indentation size effect of the material
was verified with the help of Vickers microhardness analysis. Dielectric properties as a function of frequency
have been studied over a wide range of temperatures. The third-order nonlinear susceptibility of RbHOH
was calculated to be 3.95242×10 esu.
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Luminescence, Non-Linear Optical and Fluoride ion Sensing Studies of Ferrocene/Non-Ferrocene
Conjugated Borasiloxanes and Ferrocenyl Push-Pull Chromophores

CFM Newsletter Jan. – Dec. 2022 27 Vol – 2