Gerd Binnig's Profound Influence on Nanoscience and Beyond
Professor Gerd Binnig significantly influenced modern nanoscience through his ideas, methods, and experiments, particularly in the development of the scanning tunneling microscope (STM) and the atomic force microscope (AFM).
Development of the Scanning Tunneling Microscope (STM)
In 1981, Gerd Binnig, alongside Heinrich Rohrer, Christoph Gerber, Edmund Weibel, and others, developed the first STM at IBM Zurich Research Laboratory. This invention aimed to visualize structures at the atomic level, a capability not previously possible beyond the microscale.
The project originated from a problem at IBM concerning leaking insulators in semiconductor chips, which required studying materials at a finer scale than existing instruments allowed. Binnig and Rohrer conceived the STM based on quantum tunneling, where electrons tunnel through a vacuum gap between a sharp tip and a conductive surface. This allowed them to map surface topography by measuring electron emergence points.
The Scanning Tunneling Microscope, built upon the principles of quantum tunneling, enabled unprecedented visualization of structures at the atomic level, mapping surface topography through electron emergence points.
The group published the first STM image of a Si(111)-7 × 7 reconstructed surface in 1983. The STM's development was a pivotal moment in nanotechnology, opening new avenues for research.
Impact and the Atomic Force Microscope (AFM)
Beyond the STM, its development laid the groundwork for other types of microscopes, including the AFM, scanning probe microscopes (SPM), and transmission electron microscopes (TEM). These instruments have applications ranging from graphene studies to cancer research and electronics.
Following the STM's success, Binnig and Christoph Gerber developed the AFM. The STM was limited to conductive surfaces, prompting the need for a tool to image non-conductive materials such as living organisms, ceramics, plastics, and biomolecules. The AFM operates by measuring atomic forces between a probe tip and a surface.
The Atomic Force Microscope (AFM) was a critical advancement, overcoming the STM's limitations by allowing the imaging of non-conductive materials through the measurement of atomic forces.
Binnig received the Nobel Prize for his work on the STM and was later recognized with the Kavli Prize in 2016 alongside Gerber for the AFM's development.
Background and Later Career
Gerd Binnig was born in Frankfurt am Main, West Germany, in 1947. He earned a bachelor’s degree in physics in 1973 and a PhD in 1978 from J. W. Goethe University in Frankfurt. He joined IBM Zürich Research Laboratory shortly after graduating.
In 1994, Binnig co-founded Definiens, a company focused on intelligent image analysis, which utilized Cognition Network Technology through its eCognition platform. This work extended his interest in observation and interpretation to analyzing complex images.
Definiens expanded into life sciences in 2005, focusing on cell culture screening, radiology, and pathology. The company developed Tissue Phenomics technology, which improved the identification of biomarkers in tumor tissue, aiding in diagnosis and personalized treatments. Definiens technology has since been adopted by AstraZeneca, continuing to advance pathological imaging science.
From pioneering atomic-scale imaging to advancing medical diagnostics, Gerd Binnig's career illustrates a remarkable progression that has significantly impacted both fundamental scientific understanding and patient care through advanced analytical tools.