Date of Graduation

Spring 2023


Master of Science in Materials Science


Physics, Astronomy, and Materials Science

Committee Chair

Kartik Ghosh


First, this thesis investigates the structural and optical properties of hydrothermally synthesized ZnO nanostructures, focusing on the effects of varying annealing temperatures on their properties. Structural characterizations using micro-Raman spectroscopy, X-ray diffraction (XRD), and morphological study called scanning electronic microscopy (SEM) show changes in crystallinity and intensity with different annealing temperatures. Optoelectronic characterization using photoluminescence spectroscopy reveals changes in luminescence properties near the ultraviolet region with temperature variation and in the visible emission area region. These results provide insights into how annealing temperature can affect the surface layer of ZnO nanostructures and can be applied to improve performance in electronic and photonic devices.

Secondly, this study also involved in discussing the importance of understanding the interaction between engineered nanostructures and biomolecules for the development of advanced biosensors and biomolecular targets. It focuses on to investigate the molecular level interaction between highly Raman and PL active ZnO nanostructures with varying annealing temperatures and cytosine, one of the four DNA bases using characterization techniques such as XRD, Raman spectroscopy, SEM and EDS. Raman spectroscopy proves informative in probing the bonding characteristics at the nano-bio interface and can be used for other nano-bio interactions. The study's findings can contribute to the development of novel nanomaterials for drug delivery or biosensors, allowing more insightful decisions regarding interaction kinetics in structurally related nano-bio conjugates.


ZnO, cytosine, vibrational mode, oxygen vacancy, surface defect, photo luminescence

Subject Categories

Materials Science and Engineering | Polymer and Organic Materials


© Ummay Honey

Available for download on Tuesday, May 19, 2026

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