A method for isolating, transferring and orienting single cells which have been critical point dried

Area of Science:

• Biotechnology
• Materials Science
• Surface Science

Background:

• Precise manipulation and orientation of individual cells are crucial for advanced biological and materials science applications.
• Existing methods for handling dried cells often lack the necessary control for accurate placement and orientation.
• Challenges include maintaining cell integrity and achieving consistent positioning on substrates.

Purpose of the Study:

• To develop a reliable method for handling and precisely orienting individual dried cells on substrates.
• To overcome limitations of current cell manipulation techniques.
• To enable controlled placement of cells for downstream analyses or fabrication.

Main Methods:

• Utilizing a static neutralizer gun to impart a specific charge onto a manipulation pin.
• Establishing opposite surface charges on the pin and the substrate for electrostatic attraction/repulsion.
• Employing either a similarly charged substrate or a sticky substrate for cell adherence.
• Manipulating individual dried cells using the charged pin.

Main Results:

• The electrostatic method allows for facile handling of individual dried cells.
• Precise orientation of cells on the substrate is consistently achieved.
• Cells mounted on the charged substrate remain stable under vacuum conditions (10(-6) torr) and in ionic environments typical of sputter coating.

Conclusions:

• The presented electrostatic handling technique offers a significant advancement in precise cell manipulation.
• This method facilitates controlled orientation of dried cells, enhancing their utility in scientific research and technological development.
• The technique's robustness in challenging environments makes it suitable for integration into various experimental workflows.