What are the key considerations for using biomaterials in TENGs?

Key considerations for using biomaterials in TENGs include biocompatibility, biodegradability, triboelectric performance, and mechanical properties. Biocompatibility is essential to ensure that the biomaterials do not cause adverse reactions when in contact with biological tissues or fluids, especially for implantable or wearable applications. Biodegradability allows the TENG to decompose naturally after its useful life, reducing environmental waste. The biomaterials must also exhibit suitable triboelectric properties to generate sufficient charge for energy harvesting. This involves selecting materials with appropriate work functions and surface properties. The mechanical properties, such as flexibility, elasticity, and durability, must be adequate to withstand the mechanical stresses during TENG operation. For example, cellulose or chitosan can be used as triboelectric materials in biodegradable TENGs, provided they are processed to achieve suitable surface roughness and mechanical strength, and their biocompatibility is verified for the specific application.