DOI: https://doi.org/10.29363/nanoge.cybioel.2024.022
Publication date: 28th June 2024
Biomaterial scaffolds enable 3D cultures of cells which better resemble biological systems, while advancements in bioelectronics have enabled the modulation of cells. Here, we describe various materials systems which enable soft material bioelectronics. First, we fabricate porous conductive hydrogels with the same mechanical modulus and viscoelasticity as neural tissue. The mechanical and electrical properties of the material can be tuned and used to modulate the growth and differentiation of various cell types. Application of exogenous electrical stimulation can then be applied to the scaffolds to further modulate cells. To investigate the functionality of neurite networks in 3D, we combine polydimethylsiloxane (PDMS) microstructures with multielectrode arrays. We then integrate hydrogels into the PDMS microstructures, such that the hydrogel can facilitate neurons to form 3D networks while still confined by the PDMS. Both biomaterial platforms can support the growth of neuronal cells for over 8 weeks, and can be integrated into multimaterial systems to better understand neuronal development and disease.
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