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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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Imaging-Guided Microscale Photothermal Stereolithography Bioprinting.

Jingyu Sun1, Tianqi Fang1, Yuze Zhang2

  • 1Department of Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 20, 2025
PubMed
Summary
This summary is machine-generated.

Imaging-guided microscale photothermal stereolithography bioprinting (ImPSB) overcomes limitations of costly photoinitiators. This low-cost, high-resolution technique enables advanced tissue engineering applications.

Keywords:
NIR‐II photothermal initiatorbioprintingimaging‐guided printingoptical coherence tomographystereolithography

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Area of Science:

  • Biotechnology
  • Materials Science
  • Regenerative Medicine

Background:

  • Stereolithography bioprinting often uses expensive photoinitiators, hindering progress in tissue engineering.
  • Photothermal conversion offers a low-cost alternative, but achieving high resolution in aqueous environments is challenging.

Purpose of the Study:

  • To develop a high-resolution, low-cost bioprinting method using photothermal technology.
  • To address the challenge of heat confinement in aqueous environments for stereolithography bioprinting.

Main Methods:

  • Established an imaging-guided stereolithography system for depth-resolved visualization.
  • Developed a novel photothermal initiator for the second near-infrared window.
  • Created a new bioink enabling controlled photothermal gelation.

Main Results:

  • Achieved a printing resolution of approximately 47 µm.
  • Generated smooth lines with a minimum cross-sectional diameter of approximately 104 µm.
  • Demonstrated cellular biocompatibility and feasibility for transdermal printing.

Conclusions:

  • Imaging-guided microscale photothermal stereolithography bioprinting (ImPSB) offers an unprecedented scale for photothermal aqueous stereolithography.
  • This technique paves the way for utilizing photothermal resources in high-resolution bioprinting for tissue engineering and regenerative medicine.