Biaxially textured Mo films with diverse morphologies by substrate-flipping rotation

Area of Science:

• Materials Science
• Thin Film Deposition
• Nanotechnology

Background:

• DC magnetron sputtering is a common technique for thin film deposition.
• Controlling nanostructure morphology and texture is crucial for film properties.
• Conventional rotation methods can limit texture control.

Purpose of the Study:

• To investigate a new substrate rotation technique called 'flipping rotation' for growing nanostructured Molybdenum (Mo) thin films.
• To analyze the effect of flipping rotation parameters on film morphology and texture.
• To compare the results with conventional substrate rotation methods.

Main Methods:

• DC magnetron sputtering with a 'flipping rotation' substrate mode.
• Systematic variation of rotation speed, flipping direction, and deposition angle.
• Characterization using scanning electron microscopy (SEM) and reflection high energy electron diffraction (RHEED) surface-pole-figure techniques.

Main Results:

• Diverse nanostructure morphologies (e.g., 'C'-shaped, 'S'-shaped, nanorods) were achieved.
• Despite morphological variations, a consistent [Formula: see text] biaxial texture was observed.
• Conventional rotation resulted in fiber-textured Mo films, unlike the flipping rotation method.

Conclusions:

• The 'flipping rotation' method offers precise control over nanostructure texture, independent of morphology.
• This technique enables the growth of highly textured Mo films with potential applications in various fields.
• The findings highlight the importance of substrate manipulation in thin film deposition for tailored properties.