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Atomic Force Microscopy01:08

Atomic Force Microscopy

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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.
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Atomic Emission Spectroscopy: Interference01:30

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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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Related Experiment Video

Updated: Dec 21, 2025

Implementation of a Reference Interferometer for Nanodetection
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Implementation of a Reference Interferometer for Nanodetection

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Attosecond resolution from free running interferometric measurements.

Constantin Krüger, Jaco Fuchs, Laura Cattaneo

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    |May 15, 2020
    PubMed
    Summary

    A new method called TURTLE overcomes timing jitter in attosecond measurements, improving precision for photoionization dynamics. This technique enables accurate attosecond time resolution without complex stabilization or attosecond pulses.

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    Area of Science:

    • Quantum physics
    • Attosecond science
    • Atomic and molecular physics

    Background:

    • Attosecond measurements offer deep insights into photoionization dynamics.
    • Timing jitter in pump-probe experiments limits time resolution at attosecond scales.

    Purpose of the Study:

    • To develop a novel technique for retrieving attosecond delays unaffected by timing jitter.
    • To enhance the precision of attosecond pump-probe measurements.

    Main Methods:

    • Introduced the timing-jitter unaffected RABBITT time delay extraction (TURTLE) method.
    • Utilized a stable XUV frequency comb as a pump source.
    • Applied TURTLE to measure ionization time delays between argon and neon.

    Main Results:

    • The TURTLE technique successfully measured attosecond ionization time delays.
    • Results for argon and neon agreed with previous measurements.
    • Demonstrated attosecond time resolution without pump-probe delay stabilization or attosecond pulses.

    Conclusions:

    • TURTLE significantly improves precision and simplifies attosecond measurements.
    • The method facilitates attosecond science, particularly at Free Electron Lasers (FELs).
    • A MATLAB code for the TURTLE fit is provided.