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Related Concept Videos

Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
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The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
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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.
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
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Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
07:12

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

Coherent two-dimensional nanoscopy.

Martin Aeschlimann1, Tobias Brixner, Alexander Fischer

  • 1Fachbereich Physik and Research Center OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.

Science (New York, N.Y.)
|August 13, 2011
PubMed
Summary
This summary is machine-generated.

We developed a new spectroscopic technique for imaging nanoscale coherence beyond optical limits. This method reveals subwavelength variations and plasmonic phase coherence in materials.

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Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
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Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

Published on: December 1, 2023

Area of Science:

  • Quantum mechanics
  • Spectroscopy
  • Nanotechnology

Background:

  • Established coherent two-dimensional (2D) spectroscopy is limited by optical diffraction.
  • Measuring four-wave-mixing responses restricts spatial resolution.

Purpose of the Study:

  • To introduce a novel spectroscopic method for determining nonlinear quantum mechanical response functions.
  • To enable direct imaging of nanoscale coherence beyond the optical diffraction limit.

Main Methods:

  • Coherent 2D nanoscopy using four ingoing waves.
  • Detection of the final state via photoemission electron microscopy (50-nanometer spatial resolution).

Main Results:

  • Recorded local nanospectra from a corrugated silver surface.
  • Observed subwavelength two-dimensional (2D) line shape variations.
  • Demonstrated plasmonic phase coherence of localized excitations persisting for ~100 femtoseconds with coherent beats.

Conclusions:

  • The new method allows imaging of nanoscale coherence with high spatial resolution.
  • Observations are explained by coupled oscillators leading to Fano-like resonances in hybridized modes.