Transmission Electron Microscope

by Gergely Balogh

Delong Instruments

Since 1992, Delong Instruments has been active in R&D of transmission electron microscopes, electron-opticsystems, electron guns and other high-tech devices in the field of micro and nanotechnologies. We focus on the development and production of low voltage TEMs LVEM 5 and LVEM 25 and Schottky electron gun DIGUN.

The company is also well-known for the unique customer and OEM solutions and as a supplier of customized special components made from the first draft up to the final device.

LVEM 5

Low Voltage Benchtop Electron Microscope -Nanoscale from Your Benchtop

The LVEM 5 seamlessly combines 4 different imaging functionalities into one benchtop instrument, so samples no longer need to be displaced from one microscope to another.
Furthermore, switching between imaging modes is easy, with the click of a button the same area of interest of a sample can be imaged in TEM, SEM and STEM modes.

Key features of Delong LVEM 5:

  • Powerful transmission electron microscope.
  • The LVEM 5 combines transmission (TEM, STEM) and scanning (SEM) modes as well a selectron diffraction (SAED).
  • It operates with low accelerating voltage (5 kV) which brings high contrast on light elements.
  • Resolving power down to 2 nm.
  • Biological and soft matter applications.
  • High contrast without staining.
  • Low accelerating voltage allows a very small optics column.
  • The LVEM 5 can be installedon a regulardesk – small installation space needed.
  • Itrequiresneither a darkroomnorcoolingwater.
  • Specimen tilt holderavailability.

LVEM5 BOOST:

  • Dual stage projector lens.
  • Extended magnification range up to 700 000 times.
  • Resolving power down to1.2 nm.
  • Specimen tilt holder availability.

Nanoparticles: Quantify the size, shape and structure of nano particles of gold, polymers and quantumdots directly from the bench top.

2-Dimensional Materials: Quickly resolv esize, thickness and crystal structure of 2-dimensional materials such as graphene and silicon with higher contrast than conventional EM.

Nanotubes: Image single-walled and multi-walled carbon nanotubes with clarity and precision.

LVEM 25

Low Voltage Electron Microscope

High Contrast & High Resolution. Unmatched contrast of biologic and light material samples. Image resolution as good as 1.0 nm. Meaningful results without the need for heavy metal staining. Equipped with TEM, STEM and ED imaging modes.

Key features of LVEM 25:

  • Powerful transmission electron microscope.
  • The LVEM 25 combines transmission TEM and STEM modes.
  • It operates with low accelerating voltage (25 kV) which brings enhanced contrast on light elements.
  • Resolving power down to 1 nm.
  • Biological and soft matter applications.
  • High contrast.
  • Imaging possible both with and without staining.
  • Easy to control.
  • Small installation space.
  • The LVEM 25 can be installed in an ordinary lab without any need for a dark room or cooling water. It can be supplied even as a mobile work-station.
  • Specimen tilt holder availability.

Nanoparticles: Analyse shapes, structures and size distributions of various types of nanoparticles composed of silver, gold or polymers quickly and with contrasted clarity.

Nanotubes: Verify the quality and purity of nanotube materials. High contrast image results reveal detailed sample features.

Polymers: Understand the morphology and detect imperfections in the crystal line structure of polymeric materials with highly detailed and contrasted results.