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Atomic Force Microscopy01:08

Atomic 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...
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

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Video Experimental Relacionado

Updated: May 28, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Metrología de la Atosegunda.

M Hentschel1, R Kienberger, C Spielmann

  • 1Institut für Photonik, Technische Universität Wien, Gusshausstr. 27, A-1040 Wien, Austria.

Nature
|December 6, 2001
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores lograron una resolución de un segundo (10-18 s) para la dinámica electrónica utilizando pulsos de rayos X blandos de subfemtosegundos. Este avance permite el estudio de procesos electrónicos ultrarrápidos anteriormente inaccesibles con pulsos láser de femtosegundos (10-15 s).

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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Área de la Ciencia:

  • Física Física es la física de las cosas.
  • La mecánica cuántica es la mecánica cuántica.
  • La espectroscopia es una técnica de espectroscopia.

Sus antecedentes:

  • Los pulsos láser ultracortos son cruciales para el estudio de la dinámica de la materia.
  • Los pulsos de cinco segundos capturan la dinámica molecular pero no los procesos electrónicos de un segundo.

Objetivo del estudio:

  • Para lograr una resolución de tiempo de 150 attosegundos (as) o menos.
  • Para rastrear la dinámica electrónica utilizando pulsos de rayos X suaves de subfemtosecundo y luz visible.

Principales métodos:

  • Utilizó un pulso de rayos X suave de menos de femtosegundo.
  • Empleó un pulso de luz visible de unos pocos ciclos para sondear.
  • Se logró una sincronización de un segundo entre los rayos X y los pulsos visibles.

Principales resultados:

  • Demostró una respuesta de un attosegundo del sistema atómico.
  • Se midió una duración de pulso de rayos X suave de 650 +/- 150 as.
  • Logrado a la segunda resolución para la dinámica electrónica.

Conclusiones:

  • Desarrolló herramientas experimentales para la espectroscopia de atonesegundo.
  • Se abrieron caminos para el estudio de la dinámica de los electrones ligados en una escala de tiempo de un attosegundo.