Neutral Red-carbon nanodots for selective fluorescent DNA sensing
Emiliano Martínez‐Periñán, Álvaro Martínez-Sobrino, Iria Bravo, Tania García‐Mendiola, Eva Mateo‐Martí, F. Pariente, Encarnación Lorenzo
Abstract
Carbon nanodots modified with Neutral Red covalently inserted in the nanostructure (NR-CDs) have been prepared by a simple synthesis method based on microwave irradiation under controlled temperature and pressure. The synthetized NR-CDs have been characterized by different techniques, demonstrating the covalent bonding of Neutral Red molecules to the carbon dots nanostructure. Fluorescence activity of the prepare NR-CDs has been explored showing different interaction pathways with singled and doubled stranded DNA. These studies have been successfully applied to develop a new fluorescence DNA hybridization assay to the detection of a specific DNA sequence of Escherichia coli bacteria.