scanning tunneling microscope
RareTechnical/Scientific
Definition
Meaning
A scientific instrument that uses quantum tunneling to produce images of surfaces at the atomic level by scanning them with a very fine tip.
A tool in nanoscience that not only images surfaces with atomic resolution but can also manipulate individual atoms.
Linguistics
Semantic Notes
The term is a compound noun for a specific device, often abbreviated as STM. It refers to the measurement of "tunneling current," a quantum mechanical phenomenon.
Dialectal Variation
British vs American Usage
Differences
The spelling of "tunneling" is the primary difference (British: "tunnelling"). The phrase order and usage are identical.
Connotations
None beyond the spelling variant.
Frequency
Equally rare in both varieties, confined to physics, chemistry, materials science, and nanotechnology contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The [scientist] used [instrument: a scanning tunneling microscope] to image [object: the graphene surface].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “To have tunnel vision (colloquial, unrelated meaning)”
Usage
Context Usage
Business
Virtually unused. May appear in high-tech investment reports on nanotechnology.
Academic
Primary context. Used in physics, chemistry, materials science, and engineering research papers and lectures.
Everyday
Not used in everyday conversation.
Technical
The definitive context. Used to describe the instrument's operation, results, and capabilities in lab settings.
Examples
By Part of Speech
verb
British English
- The surface was scanned using a tunnelling microscope.
American English
- They scanned the sample with a tunneling microscope.
adverb
British English
- The atoms were mapped scanning-tunnelling-microscopically.
American English
- The surface was imaged scanning-tunneling-microscopically.
adjective
British English
- The scanning-tunnelling-microscope images were groundbreaking.
American English
- The scanning-tunneling-microscope data confirmed the theory.
Examples
By CEFR Level
- Scientists use special tools to see very small things.
- A scanning tunneling microscope is a very powerful instrument for scientists.
- The researchers used a scanning tunneling microscope to obtain atomic-scale images of the new material.
- By precisely controlling the tip of a scanning tunneling microscope, the physicist was able to measure the local density of electron states.
Learning
Memory Aids
Mnemonic
Imagine a tiny mining TUNNEL so small it can scan individual atoms, making a MICROSCOpe picture from the tunneling electrons.
Conceptual Metaphor
A blind person feeling a surface with an incredibly fine cane (the tip) to 'see' its shape.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque of 'tunneling' as 'туннелирование' in the sense of digging; here it's 'туннельный эффект' or 'туннелирование' in quantum physics.
- The word 'scanning' is 'сканирующий', not 'смотрящий'.
Common Mistakes
- Misspelling 'tunneling/tunnelling'.
- Confusing it with a Scanning Electron Microscope (SEM).
- Incorrectly capitalising all words in non-title contexts.
Practice
Quiz
What is the key physical principle behind a scanning tunneling microscope?
FAQ
Frequently Asked Questions
It creates images of surfaces at the atomic level by measuring the tiny electrical current that 'tunnels' between a sharp metal tip and the surface.
No. Electron microscopes (like SEM or TEM) use beams of electrons. An STM uses a physical probe and relies on quantum tunneling, allowing it to image individual atoms.
'Tunnelling' is the standard British English spelling, while 'tunneling' is standard American English. The instrument name follows the same convention.
Indirectly, yes. The tip gets extremely close to the surface (but doesn't physically touch it in the classical sense), and it can be used to push or pick up individual atoms, a technique famously used to spell 'IBM' with xenon atoms.