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相关概念视频

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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相关实验视频

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

十秒钟计量学 十秒钟计量学

M Hentschel1, R Kienberger, C Spielmann

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

Nature
|December 6, 2001
PubMed
概括
此摘要是机器生成的。

研究人员使用低于femtosecond的软X射线脉冲实现了电子动态的每秒 (10^-18s) 分辨率. 这一突破使得研究超快速的电子过程,以前无法使用 femtosecond (10^-15 秒) 激光脉冲.

更多相关视频

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

Picometer-Precision Atomic Position Tracking through Electron Microscopy
15:04

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

相关实验视频

Last 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

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

Picometer-Precision Atomic Position Tracking through Electron Microscopy
15:04

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

科学领域:

  • 物理 物理学 物理
  • 量子力学就是量子力学.
  • 频谱学是一种光谱学.

背景情况:

  • 超短激光脉冲对于研究物质动态至关重要.
  • 五秒脉冲捕捉了分子动态,但不是每秒电子过程.

研究的目的:

  • 为了实现150个心秒 (as) 或更低的时间分辨率.
  • 为了追踪电子动态,使用低于femtosecond的软X射线脉冲和可见光.

主要方法:

  • 利用一个低于femtosecond的柔软X射线脉冲.
  • 采用几周期可见光脉冲进行探测.
  • 在X射线和可见脉冲之间实现了一秒钟的同步.

主要成果:

  • 证明了原子系统的一秒钟反应.
  • 测量了一种软X射线脉冲持续时间为650 +/- 150 as.
  • 实现电子动态的第二个分辨率.

结论:

  • 开发了用于每秒光谱的实验工具.
  • 开辟了研究绑定电子动态在attosecond时间尺度上的途径.