Method for Examining a Sample

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This invention describes a novel method for examining samples using a scanning tunneling microscope (STM). By applying a contrast agent (often a light gas such as hydrogen or helium) to the tip and/or the sample surface and cooling the area below the condensation temperature of the agent, the method enables high-resolution imaging that reveals both atomic-scale geometric and chemical structure, surpassing the usual limitations of conventional STM, which only provides electronic density information.

Use CasesContent extracted from patent full text and abstract with AI.

• Analyzing the atomic structure and chemical identity of surfaces in material science research.
• Identification and study of molecular and atomic structures in nanotechnology.
• Chemical characterization and imaging of biological samples at the nanoscale.
• Improved surface analysis in semiconductor and electronics manufacturing.
• Investigation of catalytic surfaces and active sites in chemistry.

BenefitsContent extracted from patent full text and abstract with AI.

• Provides simultaneous atomic-level geometric and chemical contrast, enabling identification of atomic and molecular structures.
• Enhances the sensitivity and resolution of STM imaging.
• Allows for the direct chemical identification of nanoscale objects and surface features.
• Flexible methodology adaptable to different gases and experimental setups.
• Makes it possible to switch between conventional electronic STM imaging and the new chemical contrast mode for comprehensive analysis.
• Facilitates the study of systems where chemical specificity is crucial, such as catalysis or molecular electronics.

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Inventors & Applicants

Patent Abstract

The invention relates to a method for examining a sample using a scanning tunneling microscope, characterised in that in at least one location on the tip of the scanning tunneling microscope and/or on the sample, which is part of the tunneling contact on taking an image, a contrast agent is applied before or during the image taking, whilst the temperature at said location is adjusted to be at or below the condensation temperature of the contrast agent. A corresponding scanning tunneling microscope is also disclosed.