Plant nanobionic materials with a giant temperature response mediated by pectin-Ca2+

Area of Science:

• Biomaterials Science
• Nanotechnology
• Plant Biology

Background:

• Conventional biomaterials often mimic or are inspired by biological structures.
• Plant nanobionics combines plant organelles with synthetic nanoparticles for enhanced functions.
• Biological temperature sensing is highly responsive but lost upon cell death.

Purpose of the Study:

• To permanently stabilize the temperature response of isolated plant cells.
• To engineer a novel biomaterial with an exceptionally high temperature coefficient of electrical resistance (TCR).
• To explore the potential of plant-based materials for advanced thermal and distance sensing.

Main Methods:

• Incorporation of carbon nanotubes (CNTs) into isolated plant cells.
• Interconnection of modified plant cells to form a composite material.
• Characterization of the material's electrical resistance and temperature response.

Main Results:

• Created a biomaterial with a TCR of -1,730% K(-1), significantly exceeding existing sensors.
• The extreme TCR is attributed to metal ions within the pectin backbone and cellulose microfibrils.
• CNTs stabilized cellular response at high temperatures and increased background conductivity.

Conclusions:

• Plant nanobionics can yield biomaterials with superior sensing capabilities.
• The developed material offers a stable and highly sensitive temperature response.
• This technology is suitable for creating advanced thermal and distance sensors.