Translating Aptamer-Modified Nanopipettes to Complex Systems
Anna Burdina
Translating Aptamer-Modified Nanopipettes to Complex Systems.
Rel. Matteo Cocuzza. Politecnico di Torino, Corso di laurea magistrale in Nanotechnologies For Icts (Nanotecnologie Per Le Ict), 2022
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Abstract
Dopamine is a type of neurotransmitter and hormone. It plays a role in many important body functions, including movement, memory, pleasurable reward, and motivation. High or low dopamine levels are associated with several mental health and neurological disorders. With these diseases on the rise, it is imperative to improve our understanding of the basics of neuronal transmission. Limitations in the selectivity and sensitivity hinder most biosensor platforms from detecting physiologically relevant changes in neurotransmitter concentrations in real-time. Moreover, spatial resolution nearing synaptic ranges 20-40 nanometers (nm) stays challenging for most of the state-of-the-art techniques. Dopamine-specific nanopipette sensor claim to be a promising candidate for serving these issues.
The working mechanism of a nanopipette is a combination of ion rectification effect which allows sensing extremely small ion changes in buffer solution and/or sensor’s surface charge alternations, and surface coating with specific molecules termed aptamers that provide selectivity
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