Related Experiment Video
Updated: Aug 5, 2026
11:33
All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Selective analysis of molecular states by functionalized scanning tunneling microscopy tips
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, China.
Physical Review Letters
|May 23, 2006
Summary
Researchers used a modified scanning tunneling microscope (STM) tip to selectively image molecular or metal states. This technique enhances energy selectivity in electron transport studies of organic interfaces.
Area of Science:
- Surface science
- Molecular electronics
- Scanning probe microscopy
Background:
- Selective analysis of molecular states in scanning tunneling microscopy (STM) is challenging.
- Perylene on Ag(110) is typically imaged via molecular pi states using standard STM.
Purpose of the Study:
- To achieve selective imaging of different electronic states in molecular adsorbates.
- To explore a new method for energy-selective electron transport measurements.
Main Methods:
- Functionalizing the STM tip with a perylene molecule.
- Performing high-resolution scanning tunneling microscopy measurements.
- Tuning the bias range of the STM.
Main Results:
- Standard STM primarily images the pi states of perylene adsorbates.
- A perylene-functionalized STM tip images only the metal states of the Ag(110) surface.
- This occurs due to an energy level mismatch between the tip and adsorbate.
Conclusions:
- Tip functionalization offers a novel approach for energy-selective imaging in STM.
- This method improves control over which electronic states are probed.
- Opens new avenues for studying electron transport through organic interfaces.
More Related Videos
Related Concept Videos
01:08Atomic Force Microscopy
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
01:07Scanning Electron Microscopy
A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
Fundamental Principles
Accelerated...
01:22Overview of Microscopy Techniques
The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...