Recent progress of nanomaterials for colorimetric and fluorescence sensing of reactive oxygen species in biological and environmental samples

• Published in: Trends in environmental analytical chemistry 2023-03, Vol.37, p.e00196, Article e00196
• Main Authors: Kailasa, Suresh Kumar, Vajubhai, Ghinaiya Nirav, Koduru, Janardhan Reddy, Park, Tae Jung
• Format: Article
• Language: English
• Subjects: Biological and environmental samples; Colorimetry; Fluorescence; Nanomaterials; ROS
• ISSN: 2214-1588; 2214-1588
• DOI: 10.1016/j.teac.2023.e00196

Incomplete reduction of oxygen produces reactive oxygen species (ROS) or intermediates. Hydrogen peroxide (H2O2), superoxide (O2•−), hydroxyl radical (•OH), and hypochlorite (ClO-) are examples of ROS. Peroxynitrite (ONOO−) belongs to reactive nitrogen species. Recent studies are evidenced that they play crucial roles in cell signaling and tissue homeostasis. Further, ROS are recognized as oxidizing chemical species for various biochemical pathways (oxidative stress and damage of organisms) and as scavengers for various environmental applications. Herein, the recent progress of nanomaterials as optical sensors for colorimetric and fluorescence sensing of reactive oxygen species is discussed. This review also provides the analytical features of nanomaterials-based colorimetric and fluorescent sensors for sensing of ROS in real samples (biological and environmental samples). Additionally, the future prospects of nanomaterials-based colorimetric and fluorescent sensors for the detection of ROS are discussed. [Display omitted] •Nanomaterials-based optical sensors have been used for the detection of various reactive oxygen species (ROS).•H2O2, O2•−, •OH, ClO- and ONOO− are detected in biological and environmental samples.•Various nanostructures acted optical sensors for imaging of ROS in biological samples.•Functional nanomaterials exhibited high selectivity towards specific ROS in the presence of others.•Nanomaterials have ability to detect ROS even at ultra-trace levels.