Browse Definitions :
Definition

scanning tunneling microscope (STM)

A scanning tunneling microscope (STM) is a device that obtains images of the atoms on the surfaces of materials. The STM is not an optical microscope; instead, it works by detecting electrical forces with a probe that tapers down to a point only a single atom across.

The probe in the STM sweeps across the surface of which an image is to be obtained. The electron shells, or clouds, surrounding the atoms on the surface produce irregularities that are detected by the probe and mapped by a computer into an image. The resolution of the image is on the order of one nanometer (1 nm) or less, where 1 nm = 0.000000001 meter = 10-9 m.

The STM has applications in molecular science, also known as nanotechnology. It can be used to move atoms individually, as well as to generate high-resolution maps of material surfaces.

This was last updated in September 2005

Continue Reading About scanning tunneling microscope (STM)

SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

SearchSecurity
SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

SearchStorage
  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • VRAM (video RAM)

    VRAM (video RAM) refers to any type of random access memory (RAM) specifically used to store image data for a computer display.

  • virtual memory

    Virtual memory is a memory management technique where secondary memory can be used as if it were a part of the main memory.

Close