Paper Key : IRJ************191
Author: Chamathka Jeewarashmi Nawarathne
Date Published: 06 Nov 2023
Abstract
In this study, the electronic structures and interactions between L-cysteine and noble metal surfaces are reviewed. The thiol group (SH) of L-cysteine plays a central role in these interactions, with the amino (NH2) and carboxyl (COOH) groups also contributing significantly. These interactions result in diverse bonding mechanisms and interface states, shaping the electronic properties of L-cysteine. Notably, the strong bond formed between L-cysteine and silver surfaces has been extensively examined using techniques like scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. These investigations reveal a complex electronic landscape, including the formation of interface electronic states above and below L-cysteine's highest occupied molecular orbital (HOMO). These findings hold promise for applications in electronic devices and biosensors, offering insights into the electronic properties of L-cysteine-modified surfaces and their potential for innovation.
DOI LINK : 10.56726/IRJMETS45748 https://www.doi.org/10.56726/IRJMETS45748