• Carbon nanotubes (CNTs) have diverse applications, including electrochemical systems, and recent interest focuses on fluid behavior within CNTs (nano-fluidics) for enhanced electrochemical interfacial area.
• Prior art studies show filling CNTs with liquids like acetonitrile improves supercapacitor efficiency, but challenges arise in simulating longer CNTs and multiwalled CNTs due to computational costs.
• Surface tension limits the entry of certain liquids into CNTs, and polar liquids like water do not wet CNTs due to their hydrophobic nature.
• Existing methods for nanotube filling involve wet chemistry or capillarity forces, but these approaches have limitations in efficiently filling multiwalled CNTs for enhanced electrochemical sensing applications.
• Therefore, there is a need for improved solvent-filled multiwalled carbon nanotubes (MWCNTs) to enhance electrochemical sensing sensitivity.

The present invention relates to related to a solvent filled multiwalled carbon nanotube for enhanced electrochemical sensing applications.

• The technology introduces a method of enhancing electrochemical sensing using multiwalled carbon nanotubes (MWCNTs) filled with various organic solvents like ACN, DMSO, DMF, etc.
• These solvent-filled MWCNTs exhibit higher sensitivity for detecting analytes such as dopamine, ascorbic acid, uric acid, and oxygen in aqueous solutions.
• The enhanced sensitivity is attributed to the interaction between solvent molecules and MWCNTs through London forces.
• NMR spectra of solvents extracted from MWCNTs confirm the filling process. Solvents like DMSO and DMF show signals in the NMR spectra, indicating their interaction and filling within MWCNTs
• Electrochemical analysis reveals that solvent-filled MWCNT-coated electrodes exhibit improved sensitivity and reversibility in detecting analytes such as dopamine.