“…[ 42–59 ] A compelling avenue involves the utilization of single‐walled carbon nanotubes (SWCNTs), which offer several advantageous features such as remarkable photostable fluorescence emission in the NIR range, biocompatibility, and ease of surface functionalization. [ 60–70 ] SWCNTs have been used for fluorometric detection of important analytes, including small molecules, [ 53,71–74 ] oncometalbolites, [ 75 ] proteins, [ 60,61,68,69,76–80 ] neurotransmitters, [ 42,81–83 ] pathogens, [ 84,85 ] metal ions, [ 86 ] endolysosomal pH, [ 87 ] disease biomarkers, [ 88,89 ] plant hormones, [90] sugars, [91] quaternary ammonium compounds, [ 92 ] microRNA [ 93–95 ] cytokines, [ 79 ] volatiles, [ 96,97 ] hormones, [ 90,98 ] and bacterial siderophores, [60] to name a few. In addition, SWCNTs have been utilized as a probe for the inactivation of tyrosinase enzyme by observing a bathochromic shift in their emission wavelength, induced by the generation of singlet oxygen during the enzyme inactivation process.…”