PROJECT TITLE :

Scale of Carbon Nanomaterials Affects Neural Outgrowth and Adhesion

ABSTRACT:

Carbon nanomaterials have become increasingly well-liked microelectrode materials for neuroscience applications. Here we have a tendency to study how the size of carbon nanotubes and carbon nanofibers affect neural viability, outgrowth, and adhesion. Carbon nanotubes were deposited on glass coverslips via a layer-by-layer technique with polyethylenimine (PEI). Carbonized nanofibers were fabricated by electrospinning SU-eight and pyrolyzing the nanofiber depositions. Further substrates tested were carbonized and SU-8 skinny films and SU-8 nanofibers. Surfaces were O2-plasma treated, coated with varying concentrations of PEI, seeded with E18 rat cortical cells, and examined at 3, four, and 7 days in vitro (DIV). Neural adhesion was examined at four DIV utilizing a parallel plate flow chamber. At 3 DIV, neural viability was lower on the nanofiber and skinny film depositions treated with higher PEI concentrations that corresponded with considerably higher zeta potentials (surface charge); this significance was drastically higher on the nanofibers suggesting that the nanostructure could collect additional PEI molecules, causing increased toxicity. At seven DIV, considerably higher neurite outgrowth was observed on SU-8 nanofiber substrates with nanofibers a important fraction of a neuron's size. No variations were detected for carbonized nanofibers or carbon nanotubes. Both carbonized and SU-eight nanofibers had considerably higher cellular adhesion post-flow in comparison to controls whereas the carbon nanotubes were statistically similar to regulate substrates. These information recommend a neural cell preference for larger-scale nanomaterials with specific surface treatments. These characteristics may be taken advantage of in the longer term design and fabrication of neural microelectrodes.


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