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Related Concept Videos

Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

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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Related Experiment Video

Updated: May 12, 2026

Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization
06:33

Three-dimensional Imaging of Bacterial Cells for Accurate Cellular Representations and Precise Protein Localization

Published on: October 29, 2019

Three dimensional live cell lithography.

Anna Linnenberger1, Martha I Bodine, Callie Fiedler

  • 1Department of Electrical, Computer, and Energy Engineering, University of Colorado, 1111 Engineering Drive, 422 UCB, Boulder, Colorado 80309-0422, USA.

Optics Express
|April 24, 2013
PubMed
Summary
This summary is machine-generated.

Holographic optical trapping and stereolithography precisely position living cells in 3D hydrogels. This technique enables the fabrication of complex, multi-layered cell scaffolds for tissue engineering applications.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Optics

Background:

  • Precise control over 3D cell positioning is crucial for tissue engineering.
  • Existing methods lack the resolution and scalability for complex scaffold fabrication.

Purpose of the Study:

  • To develop a method for fine control of living cell 3D position within microstructured hydrogels.
  • To fabricate 3D live cell scaffolds with micron-scale structures and millimeter dimensions.

Main Methods:

  • Holographic optical trapping (HOT) combined with step-and-repeat maskless projection stereolithography.
  • Utilized C2C12 myoblast cells as a model system.
  • Employed a lithium acylphosphinate (LAP) salt photoinitiator for selective photopolymerization at 405 nm, insensitive to 1064 nm trapping laser.

Main Results:

  • Demonstrated precise 3D positioning of C2C12 cells using HOT.
  • Successfully encapsulated cells within photopolymerized hydrogels using stereolithography.
  • Achieved large lateral dimensions via step-and-repeat patterning and large thickness through multi-layer fabrication.
  • Confirmed cell viability post-trapping and encapsulation.

Conclusions:

  • The combined HOT and stereolithography technique offers fine control over 3D cell arrangement.
  • This method enables the creation of complex, precisely arranged 3D live cell scaffolds.
  • The fabricated scaffolds maintain cell viability and are suitable for applications like tissue engineering.