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Molecularly imprinted carbon based electrodes for tetrahydrocannabinol sensing

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THC molecularly imprinting polymers, THC electrochemical sensor

Abstract (summary)

Tetrahydrocannabinol (THC) sensors were fabricated using carbon nanotubes (CNT) or carbon beads and poly(methyl acrylic acid-co- ethylene glycol dimethacrylate) (poly(MAA-Co-EGDMA)) with molecularly imprinting technology in micropipette tubes. The carbon materials allow the electrode high sensitivity due to high surface area, and the cavities of THC temples will enhance selectivity of the electrode toward THC because of molecular recognition of THC cavities. These electrodes exhibit high THC detection selectivity over caffeine and acetaminophen. The limit of THC detection for CNT-MIP electrodes is as low as 0.18 ± 0.02 ng/mL, which is much lower than that of electrodes with nonimprinted polymers (NIP) which is 12.5 ± 0.5 ng/mL. The morphology was characterized using scanning electron microscope (SEM), which exhibited the presence of polymers on the surface of carbon materials in the electrodes. The thermal stability of polymers was also tested using thermogravimetric analysis (TGA).

Publication Information

Zhang, Q. M., Berg, D., & Mugo, S. M. (2019). Molecularly imprinted carbon based electrodes for tetrahydrocannabinol sensing. Inorganic Chemistry Communications, 107.


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