Research & Development World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE

Light-shrinking material lets ordinary microscope see in super resolution

By Heather Hall | June 2, 2021

by University of California San Diego

This light-shrinking material turns a conventional light microscope into a super-resolution microscope. Photo courtesy of Junxiang Zhao

Electrical engineers at the University of California San Diego developed a technology that improves the resolution of an ordinary light microscope so that it can be used to directly observe finer structures and details in living cells.

The technology turns a conventional light microscope into what’s called a super-resolution microscope. It involves a specially engineered material that shortens the wavelength of light as it illuminates the sample — this shrunken light is what essentially enables the microscope to image in higher resolution.

“This material converts low resolution light to high resolution light,” said Zhaowei Liu, a professor of electrical and computer engineering at UC San Diego. “It’s very simple and easy to use. Just place a sample on the material, then put the whole thing under a normal microscope — no fancy modification needed.”

The work, which was published in Nature Communications, overcomes a big limitation of conventional light microscopes: low resolution. Light microscopes are useful for imaging live cells, but they cannot be used to see anything smaller. Conventional light microscopes have a resolution limit of 200 nanometers, meaning that any objects closer than this distance will not be observed as separate objects. And while there are more powerful tools out there such as electron microscopes, which have the resolution to see subcellular structures, they cannot be used to image living cells because the samples need to be placed inside a vacuum chamber.

“The major challenge is finding one technology that has very high resolution and is also safe for live cells,” said Liu.

The technology that Liu’s team developed combines both features. With it, a conventional light microscope can be used to image live subcellular structures with a resolution of up to 40 nanometers.

Comparison of images taken by a light microscope without the hyperbolic metamaterial (left column) and with the hyperbolic metamaterial (right column): two close fluorescent beads (top row), quantum dots (middle row), and actin filaments in Cos-7 cells (bottom row).

The technology consists of a microscope slide that’s coated with a type of light-shrinking material called a hyperbolic metamaterial. It is made up of nanometers-thin alternating layers of silver and silica glass. As light passes through, its wavelengths shorten and scatter to generate a series of random high-resolution speckled patterns. When a sample is mounted on the slide, it gets illuminated in different ways by this series of speckled light patterns. This creates a series of low-resolution images, which are all captured and then pieced together by a reconstruction algorithm to produce a high-resolution image.

The researchers tested their technology with a commercial inverted microscope. They were able to image fine features, such as actin filaments, in fluorescently labeled Cos-7 cells —features that are not clearly discernible using just the microscope itself. The technology also enabled the researchers to clearly distinguish tiny fluorescent beads and quantum dots that were spaced 40 to 80 nanometers apart.

The super resolution technology has great potential for high-speed operation, the researchers said. Their goal is to incorporate high speed, super resolution and low phototoxicity in one system for live cell imaging.

Liu’s team is now expanding the technology to do high resolution imaging in three-dimensional space. This current paper shows that the technology can produce high-resolution images in a two-dimensional plane. Liu’s team previously published a paper showing that this technology is also capable of imaging with ultra-high axial resolution (about 2 nanometers). They are now working on combining the two together.

Paper title: “Metamaterial assisted illumination nanoscopy via random super-resolution speckles.” Co-authors include: Yeon Ui Lee*, Junxiang Zhao*, Qian Ma*, Larousse Khosravi Khorashad, Clara Posner, Guangru Li, G. Bimananda M. Wisna, Zachary Burns and Jin Zhang, UC San Diego.

*These authors contributed equally to this work

This work was supported by the Gordon and Betty Moore Foundation and the National Institutes of Health (R35 CA197622). This work was performed in part at the San Diego Nanotechnology Infrastructure (SDNI) at UC San Diego, a member of the National Nanotechnology Coordinated Infrastructure, which is supported by the National Science Foundation (grant ECCS-1542148).

 

Related Articles Read More >

How materials scientists are using (S)TEM to better understand our world on the atomic scale 
Chromium X (GEM-X Flex) instrument on the bench
10x CTO on Chan Zuckerberg, Arc Institute ties and industrializing single-cell biology
Thermo Fisher’s new Orbitrap Excedion Pro targets complex biotherapeutics for drug development
Peak Scientific trims lab-gas footprint with new Intura series at ASMS 2025
rd newsletter
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, trends, and strategies in Research & Development.
RD 25 Power Index

R&D World Digital Issues

Fall 2024 issue

Browse the most current issue of R&D World and back issues in an easy to use high quality format. Clip, share and download with the leading R&D magazine today.

Research & Development World
  • Subscribe to R&D World Magazine
  • Enews Sign Up
  • Contact Us
  • About Us
  • Drug Discovery & Development
  • Pharmaceutical Processing
  • Global Funding Forecast

Copyright © 2025 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search R&D World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE