This technology provides a sensitive, fast and continuous saccharide sensor with enhanced selectivity towards glucose.
A novel method for surface coating of single-walled carbon nanotubes (SWNT) for analyte binding and sensing is proposed. Blood glucose detection is of critical importance for patients suffering from diabetes mellitus, a disease currently effecting 347 million people worldwide. Developing reliable, sensitive and durable sensors with which individuals can monitor and control the potential life-threatening effects of this disease remains a heavily researched topic. Here, a nanosensor is proposed, comprised of a novel composition of phenylboronic acid polymer complexed with SWNT. This polymer is formed using reversible addition forward chain transfer polymerization and is used to impart water solubility and saccharide sensitivity to individual SWNT fluorophores. Furthermore, this sensing mechanism is confirmed as occurring nearly instantaneously, as is demonstrated by transient measurements. The selectivity of these complexes is distinct from that of free boronic acid moieties. Moreover, polymers having different phenylboronic acid derivatives and molecular weights can impart distinct saccharide or other analyte binding profiles when coupled to SWNT. As such, this complex represents an intriguing new class of sensors, which may be utilized for blood glucose monitoring or other diagnostic sensing applications.
Modifiable for selective binding of different analytes