Journal of Material Sciences & Engineering

Sreetama Dutta

Publications

• Research Article
  Positron Annihilation Study of ZnO Nanoparticles Grown Under Folic Acid Template
  Author(s): Sreetama Dutta, Sourav Sarkar and Bichitra Nandi GangulySreetama Dutta, Sourav Sarkar and Bichitra Nandi Ganguly
  
  Positron lifetime spectroscopy (PAL), Doppler broadening (DB) as well as coincidence Doppler broadening (CDB) spectroscopy of a new variety of Folic acid (FA) capped zinc oxide nano-particle samples has been performed at room temperature. The results show interesting patterns of observation, hither-to unobserved in ZnO wurtzite crystalline samples, such as predominance of positronium formation, as reflected in the (PAL) analysis, phase transition in the nano crystalline samples at ~0.8-1.0 % FA concentration as depicted from DB results. Also, the chemical environment of the samples has been analysed from the ratio curves of CDB studies. Beside these, other independent results from X-ray diffraction (XRD) data and Debye- Scherrer method, Transmission electron microscopic (TEM) observations and as well as Fourier transformed infrared spectroscopic (FT-IR) analysis are reported for compa.. Read More»
  DOI: 10.4172/2169-0022.1000134

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