Aneesha

Delhi Technological University, India

Abstract Title: Development and Characterization of MoSe? Quantum Dots for Sensing Applications

Biography:

Ms. Aneesha, an accomplished M.Sc. Physics graduate from MDU Rohtak (2017), is a Research Scholar at the Laser Spectroscopy Lab, DTU. Joining in 2020, her research focuses on Quantum Dots and 2D nanostructures, particularly Transition Metal Dichalcogenides (TMDs). In 2023, she published two impactful research papers in reputed journals. Additionally, two more papers are currently being communicated and are under review. Her innovative work led to a patent for a probe detecting ferric ions in water, granted in December 2023. Her active participation in conferences reflects her dedication to advancing knowledge in applied physics, making her a valuable contributor to her field.

Research Interest:

Molybdenum diselenide (MoSe?) quantum dots (QDs) are emerging as promising materials for gas sensing, offering unique advantages over other Transition Metal Dichalcogenides (TMDs) like MoS? and WS? due to their superior electronic properties and enhanced sensitivity. In this study, MoSe? QDs were synthesized using a hydrothermal method and systematically characterized using techniques such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, High-Resolution Transmission Electron Microscopy (HRTEM), and Raman spectroscopy. XRD confirmed the crystalline structure, while HRTEM revealed uniform nanoscale morphology. Raman analysis validated the formation of MoSe?, while FTIR indicated the presence of key functional groups. The optical properties of the QDs were explored using UV-Vis absorption and photoluminescence (PL) spectroscopy, which demonstrated strong absorption and significant PL, making them suitable for optoelectronic applications. Notably, MoSe? QDs exhibited enhanced sensitivity to ammonia (NH?) compared to more commonly used TMDs, attributed to their unique band structure and higher charge carrier mobility. Preliminary gas sensing tests showed rapid response, high sensitivity, and good recovery, highlighting their potential for detecting hazardous gases. The superior sensing capabilities of MoSe? QDs and their excellent optical characteristics position them as a viable alternative to conventional TMDs for applications in environmental monitoring and gas detection systems, offering improved performance in real-time air quality assessments.