3D Customized Silica-Based AFM Probes Fabricated by Selective Laser Etching.

Area of Science:

• Materials Science
• Nanotechnology
• Microscopy

Background:

• Atomic force microscopy (AFM) relies on cantilevers as crucial force sensors and interaction tools.
• Conventional silicon or silicon nitride micro-machining methods for AFM probes are complex, slow, and limit design flexibility.

Purpose of the Study:

• To explore the development of innovative AFM cantilevers using silica glass and selective laser etching.
• To offer a fabrication method with enhanced design flexibility, reduced cost, and faster production times.

Main Methods:

• Utilized selective laser etching for fabricating silica glass AFM cantilevers.
• Characterized cantilevers with thicknesses from 1 to 50 µm and spring constants from 0.02 to 80 N/m.

Main Results:

• Successfully fabricated functional glass cantilevers with tunable properties.
• Demonstrated excellent performance of the glass probes in AFM imaging and force spectroscopy.
• Achieved design flexibility and a simplified, cost-effective three-step fabrication process.

Conclusions:

• Selective laser etching offers a versatile and efficient method for producing novel silica-based AFM probes.
• The developed glass cantilevers show significant potential for advancing AFM applications.
• This approach minimizes reliance on complex equipment and cleanroom facilities.