3D printed bionic ears

Area of Science:

• Biomedical Engineering
• Materials Science
• Synthetic Biology

Background:

• Conventional electronics are 2D, hindering integration with 3D biological tissues.
• Creating bionic organs requires merging disparate materials and manufacturing processes.

Purpose of the Study:

• To develop a novel additive manufacturing strategy for integrating biological cells with nanoelectronic elements.
• To demonstrate the feasibility of creating functional bionic organs with enhanced capabilities.

Main Methods:

• Utilized 3D printing to combine cell-seeded hydrogel with nanoparticle-infused conducting polymers.
• Fabricated a bionic ear with an integrated inductive coil antenna and cochlea-shaped electrodes.
• Cultured cartilage tissue around electronic components within the printed structure.

Main Results:

• Successfully created a bionic ear capable of in vitro cartilage tissue growth.
• Demonstrated enhanced auditory sensing through radio frequency reception.
• Achieved stereo audio music playback using complementary printed ears.

Conclusions:

• The proposed additive manufacturing approach effectively merges biological and nanoelectronic functionalities.
• This strategy offers a pathway for creating advanced bionic organs with superior capabilities.
• The technology has potential applications in regenerative medicine and bioelectronic interfaces.