The Importance of Defects in Controlling the Chemistry of Single-Walled Carbon Nanotubes

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5128 - 5139

Опубликована: Май 14, 2025

Defects in single-walled carbon nanotubes (SWCNTs) serve as active sites for chemical reactions, enabling selective functionalization and molecular interactions that are otherwise inaccessible pristine SWCNTs. By altering the electronic structure local reactivity, defects play a pivotal role controlling chemistry of SWCNTs, dictating how they interact with external molecules. In this mini-review, we explore defect engineering transforms SWCNTs into platforms transformations, starting photophysical principles governing defect-induced optical transitions. We then examine strategies introducing atomic defects, their influence on fluorescence behavior, facilitating reactions. Additionally, discuss challenges establishing direct correlations between composition both properties. Finally, highlight emerging opportunities defect-engineered sensing, bioimaging, catalysis, emphasizing need rational design to harness full potential.

Язык: Английский

Ultrasensitive and Selective Detection of Dopamine Through Substituent-Regulated Evolution of Quantum Defects

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Май 21, 2025

Accurate detection and analysis of biomolecules like dopamine (DA) are vital for monitoring human health, particularly given DA's critical roles in a lot medical disorders such as depression, Parkinson's Alzheimer's diseases, myopia. DA is often found at very low concentrations within certain body fluids, making it challenging yet essential target detection. This study presents an innovative ultrasensitive methodology based on quantum system, characterized by its exceptional sensitivity, selectivity, linearity. By leveraging the unique defect emission from semiconducting single-walled carbon nanotubes (SWCNTs) near-infrared II region, our approach effectively detects with high physiologically relevant range nanomolar, limit 1 nM. The sensing system maintains performance phosphate-buffered saline urine environments. interaction between aryldiazonium salts that generates sp3 defects SWCNTs surface, regulated specific substituents benzene ring, dictates sensor's performance, ensuring superior selectivity against biologically molecules. These advancements hold great potential early disease detection, prevention, treatment, marking important advance field biomedical diagnostics nanosensor research.

Язык: Английский