Virtual reality visual feedback for hand-controlled scanning probe microscopy manipulation of single molecules

Area of Science:

• Nanoscience and Nanotechnology
• Surface Science
• Molecular Manipulation

Background:

• Controlled manipulation of single molecules is crucial for fabricating nanoscale devices and molecular machines.
• Scanning probe microscopy (SPM) is the primary technique for imaging and manipulating molecules at the nanoscale.
• Hand-controlled manipulation (HCM) simplifies protocol identification when molecular interactions are not fully understood.

Purpose of the Study:

• To enhance the effectiveness of hand-controlled manipulation (HCM) for single-molecule manipulation.
• To introduce real-time 3D visual feedback into the HCM technique.
• To demonstrate the improved capabilities of the enhanced HCM setup.

Main Methods:

• Integration of Oculus Rift virtual reality (VR) goggles with an existing HCM setup.
• Real-time 3D visualization of the SPM tip's trajectory and position during manipulation.
• Simultaneous plotting of non-contact atomic force microscope (NC-AFM) frequency shift (Δf) and tunneling current (I).

Main Results:

• The enhanced HCM setup provides experimentalists with real-time 3D visual and quantitative feedback.
• The system effectively displays the SPM tip's movement and interaction signals (Δf, I).
• Successful demonstration of extracting an individual PTCDA molecule from a monolayer on Ag(111) surface.

Conclusions:

• The addition of VR goggles significantly improves the effectiveness of HCM for single-molecule manipulation.
• This enhanced technique offers better control and understanding during complex molecular manipulation tasks.
• The methodology holds promise for advancing the fabrication of single-molecule devices and molecular machines.