Nanopatterning on silicon surface using atomic force microscopy with diamond-like carbon (DLC)-coated Si probe

Area of Science:

• Materials Science
• Nanotechnology
• Surface Science

Background:

• Atomic Force Microscopy (AFM) is a key tool for nanoscale surface analysis and modification.
• Scratch nanolithography offers a method for creating precise patterns on surfaces.
• Diamond-like carbon (DLC) coatings enhance probe durability and performance.

Purpose of the Study:

• To investigate the influence of various parameters on scratch nanolithography using DLC-coated AFM probes.
• To determine the optimal conditions for fabricating nanostructures on silicon surfaces.
• To evaluate the potential of DLC-coated probes as an alternative for AFM-based nanofabrication.

Main Methods:

• Utilized an Atomic Force Microscope (AFM) equipped with a diamond-like carbon (DLC)-coated silicon probe.
• Performed scratch nanolithography on silicon (Si) surfaces.
• Systematically varied parameters including scratch direction, applied tip force, scratch speed, and number of scratches.

Main Results:

• The size of the generated grooves was found to be dependent on scratch direction, applied tip force, and number of scratches.
• Groove size increased with higher applied tip force and number of scratches.
• Groove size decreased slightly with increased scratch speed.
• Uniform and precise complex nanostructures, such as parallel lines and square arrays, were fabricated at high scratch speeds.

Conclusions:

• DLC-coated Si probes are effective for scratch nanolithography on Si surfaces.
• The study identified key parameters influencing nanostructure geometry.
• DLC-coated probes present a viable alternative for AFM-based scratch nanofabrication on hard surfaces.