Graphene Lid Extends Photoemission Electron Microscopy to Liquids

  • Magazine Article
  • TBMG-34753
Published July 01, 2019 by Tech Briefs Media Group in United States
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  • English

By capping liquids with graphene (an ultrathin sheet of pure carbon), researchers can easily image and analyze liquid interfaces and the surface of nanometer-scale objects immersed in liquids. In the imaging technique known as photoemission electron microscopy (PEEM), ultraviolet light or X-rays bombard a sample, stimulating the material to release electrons from a region at or just beneath its surface. Electric fields act as lenses, focusing the emitted electrons to create an image.