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Related Concept Videos

Crystal Density01:19

Crystal Density

The crystal lattice structure of a material allows us to determine how many molecules exist in its unit cell. With this information, alongside the unit-cell parameters - three distance parameters (a, b, c) and three angular parameters (α, β, γ).Density (ρ) = (Z × M) / (a × b × c × NA)where:Z is the number of formula units per unit cellM is the molar mass of the substancea, b, and c are the edge lengths of the unit cellNA is Avogadro’s numberFor a simple cubic lattice, atoms are located only at...

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Related Experiment Video

Updated: Jun 24, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Imaging cellular forces with photonic crystals.

Qiwei Li1, Zaozao Chen1,2, Ying Zhang1

  • 1State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, 210096, Nanjing, Jiangsu, China.

Nature Communications
|November 14, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed photonic crystal cellular force microscopy (PCCFM) to visualize and quantify cellular forces with high speed and throughput. This new method overcomes limitations of current techniques for live cell imaging and multi-scale analysis.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Materials Science

Background:

  • Existing methods for visualizing and quantifying cellular forces are limited in live cell imaging, throughput, and multi-scale analysis.
  • These limitations hinder progress in cell force research and its practical applications.

Purpose of the Study:

  • To develop a novel microscopy technique for high-speed, wide-field-of-view imaging and quantification of cellular forces.
  • To overcome the limitations of current cell force visualization and analysis methods.

Main Methods:

  • Development of photonic crystal cellular force microscopy (PCCFM).
  • Utilized a photonic crystal hydrogel substrate (PCS) that converts micro-nano deformations into color changes.
  • Enabled reference-free, high-speed (approx. 20 fps) imaging over a 1.3 mm x 1.0 mm field of view.

Main Results:

  • PCCFM allows in situ visualization and quantification of vertical cell forces with high throughput.
  • Demonstrated long-term, cross-scale monitoring capabilities, from subcellular focal adhesions to tissue-level cell sheets.
  • Achieved high-speed imaging without the need for external references.

Conclusions:

  • PCCFM is a powerful new tool for advancing cell force research.
  • The technique offers significant improvements in speed, throughput, and scale for cellular force measurements.
  • Enables new possibilities for understanding cell mechanics and tissue development.