Microscopic techniques bridging between nanoscale and microscale with an atomically sharpened tip - field ion...

Area of Science:

• Materials Science
• Nanotechnology
• Surface Science

Background:

• Atomistic point of view and high-resolution microscopies (FIM, STM, AFM, TEM) are crucial for materials science but struggle to bridge the gap to industrial-scale properties.
• Developing "emergence science" requires combining nanoscale and microscale techniques to link atomic-level understanding with practical material engineering.
• Scanning Probe Microscopy (SPM), utilizing atomically sharp tips, is fundamental for atomic position control and serves as a base for emergence science.

Purpose of the Study:

• To develop combined microscopic instruments and sophisticated sample preparation methods to bridge the scale gap between atomic and industrial material properties.
• To establish a correlation between nanoscale and microscale properties of functional materials.
• To explore the potential of SiO2-TiO2 composite systems for enhanced catalytic and super-hydrophilic properties.

Main Methods:

• Development and integration of combined microscopic instruments: Field Ion Microscopy (FIM), Field Emission Microscopy (FEM), Scanning Tunneling Microscopy (STM), Atomic Force Microscopy (AFM), and Scanning Electron Microscopy (SEM).
• Preparation and characterization of atomically sharp tips for SPM.
• Development of a simple sample preparation method for rutile single crystal TiO2 covered with an epitaxially-grown monolayer of SiO2 via high-temperature annealing.
• Characterization techniques including Low Energy Electron Diffraction (LEED) and Frequency-Modulation (FM) AFM, alongside Water Contact Angle (WCA) measurements.

Main Results:

• Successful development of combined microscopic instruments and sample preparation techniques to correlate nanoscale and microscale material properties.
• Fabrication of SiO2-TiO2 composite systems exhibiting protected catalytic TiO2 performance and extended water super-hydrophilicity.
• Demonstration of the potential of WCA measurements, under controlled environmental conditions, to bridge scale gaps in material characterization.

Conclusions:

• The developed combined microscopy and sample preparation strategies are essential for advancing emergence science.
• The SiO2-TiO2 composite system shows promise for functional materials, though further understanding is needed.
• Bridging the gap between atomic-scale insights and macroscale applications is achievable through integrated techniques and careful sample design.