A band gap, also known as an energy gap in solid-state physics, is an energy range in a solid where no electronic states can exist.
Published in Chapter:
Synthesis and Characterization of Carbon-Based Quantum Dot From Rice, Sugar, and Aloe-Vera
Sunil Kumar Pradhan (School of Electronics Engineering, Vellore Institute of Technology, Chennai, India),
Akula Maheswari Durga (Department of Electronics and Communication Engineering, National Institute of Technology, Andhra Pradesh, India),
Sumit Kashyap (Department of Electronics and Communication Engineering, National Institute of Technology, Andhra Pradesh, India), and
Jostin Vara (Department of Electronics and Communication Engineering, National Institute of Technology, Andhra Pradesh, India)
Copyright: © 2023
|Pages: 15
DOI: 10.4018/978-1-6684-7358-0.ch013
Abstract
Carbon quantum dots (CQDs), a novel class of zero-dimensional carbon nanostructures with diameters below 10 nm, have recently come into existence. The authors have synthesized and analyzed carbon-based quantum dots from aloe-vera, rice, and sugar. The characterization of these quantum dots is done via UV-visible spectrophotometer. The quantum dots that are made from chemicals are toxic and are harmful to both humans and animals. However, the carbon quantum dots (CQD) which they have synthesized in this research work are bio-compatible, less toxic, and have the property of high aqueous dispersibility. CQDs are being used in various fields of applications such as bio-imaging, medical diagnosis, bio-sensing, chemical sensing, photo catalysis, and photovoltaic devices. This study helps the scientific community to understand the nature of carbon quantum dots and gives a brief idea of suitable materials that create CQD.