Fermentation based carbon nanotube multifunctional bionic composites.

Area of Science:

• Materials Science
• Biotechnology
• Nanotechnology

Background:

• Microbial processes can yield unique biogenic materials not producible through abiotic methods.
• Living hybrid materials offer novel functionalities by integrating biological components with synthetic materials.

Purpose of the Study:

• To develop a novel living hybrid material using Saccharomyces cerevisiae and carbon nanotubes (CNTs).
• To investigate the structural, mechanical, electrical, and photoconductive properties of the resulting composite.
• To explore the potential applications of this bionic composite in self-assembling sensor technologies.

Main Methods:

• Preparation of a bionic composite via room-temperature fermentation of Saccharomyces cerevisiae with CNTs.
• Characterization using Scanning Electron Microscopy (SEM) to observe CNT internalization and cell bridging.
• Mechanical testing (tensile tests) and electrical conductivity measurements of the dried composite films.

Main Results:

• SEM confirmed internalization of CNTs by yeast cells, forming a bridging network.
• The composite exhibited significantly enhanced tensile strength, attributed to CNT-cell adhesion.
• Improved electrical conductivity and higher photoconductive activity were observed with CNT addition.

Conclusions:

• A novel, room-temperature fermentation process successfully created a living hybrid material from yeast and CNTs.
• The bionic composite demonstrates superior mechanical and electrical properties due to the CNT-cell bridging mechanism.
• This approach paves the way for developing self-assembling, interactive sensors for strain or light detection.