The properties of solid-state materials depend on their structural and chemical purity. Recent advances in nanoparticle synthesis and preparation have shown that minor disturbances give rise to novel material characteristics. Techniques such as symmetry breaking and defect incorporation have been used to tailor hollow metal chalcogenide particles , engineer colloidal crystals with DNA and create new emission features via nitrogen vacancy (NV) centers in nanodiamonds . A material that is very susceptible to small changes in its structure and environment are carbon nanotubes (CNTs). They have rich optoelectronic and mechanical properties and broad potential for material science and biomedicine . Among the different types of CNTs, single wall carbon nanotubes (SWCNTs) have become a multidisciplinary field , because of their intrinsic near-infrared (NIR) fluorescence (850-1700 nm) . This property has been used to develop powerful biosensors for a range of analytes including small molecules, lipids, proteins, neurotransmitters, and sugars. Such sensors have been employed in complex biomedical applications such as fast neurotransmitter imaging , pathogen diagnostics , insulin detection , stress detection in plants , monitoring wound healing or cancer marker detection .