Interfacing electrogenic cells with 3D nanoelectrodes: position, shape, and size matter.

Area of Science:

• Biophysics
• Nanotechnology
• Cellular Engineering

Background:

• Coupling electrically excitable cells with electronic devices requires understanding cell-nanostructure interfaces.
• 3D nanostructures offer high sensitivity and scalability for intracellular electrical signal recording and stimulation.
• The mechanisms of cell engulfment by 3D nanostructures remain incompletely understood.

Purpose of the Study:

• To systematically investigate the interface between cells and two types of 3D nanostructures: capped and uncapped cylindrical pillars.
• To link experimental observations of cell-nanostructure interactions with theoretical membrane properties.
• To predict optimal 3D nanostructure designs for enhanced cell-chip coupling.

Main Methods:

• Utilized electron microscopy to examine cell-nanostructure interfaces.
• Developed and applied a theoretical membrane deformation model.
• Correlated experimental data with theoretical predictions.

Main Results:

• Provided a detailed analysis of cell engulfment processes on different nanostructure geometries.
• Established a link between nanostructure dimensions, cell membrane properties, and coupling efficiency.
• Identified key parameters influencing the interaction between cells and 3D nanostructures.

Conclusions:

• The study elucidates the fundamental mechanisms of cell-nanostructure interactions.
• The findings enable the rational design of 3D nanostructures for improved bioelectronic interfaces.
• Predictive models and experimental data guide the optimization of nanostructure shape and size for effective cell-chip coupling.