True Atomic-Resolution Surface Imaging and Manipulation under Ambient Conditions via Conductive Atomic Force...

Area of Science:

• Materials Science
• Surface Science
• Nanotechnology

Background:

• Surface properties dictate crucial chemical and mechanical phenomena.
• Current atomic-level surface characterization requires extreme conditions (ultrahigh vacuum, low temperature).
• These conditions limit relevance to real-world applications.

Purpose of the Study:

• To demonstrate true atomic-resolution surface imaging under ambient conditions.
• To enable detailed surface characterization and manipulation outside of vacuum environments.
• To explore new possibilities for studying surface phenomena.

Main Methods:

• Conductive Atomic Force Microscopy (C-AFM) at high scanning speeds.
• Imaging various material surfaces, including those with defects.
• Hypothesizing mechanisms for atomic resolution (confined conductive pathway or sharp tip asperity).

Main Results:

• Achieved true atomic-resolution surface imaging under ambient conditions.
• Mapped material surfaces with atomic precision, revealing defects like vacancies.
• Demonstrated *in situ* charge state manipulation on MoS₂.
• Observed room-temperature charge ordering in α-Mo₂C (an MXene).

Conclusions:

• Conductive Atomic Force Microscopy (C-AFM) is a powerful tool for ambient atomic-resolution imaging.
• This technique enables manipulation of surface structure and electronics under ambient conditions.
• Findings have wide-ranging applicability in catalysis, friction, and materials science.