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Our MRSEC logo shows the arrangement of atoms at the surface of a crystal. Crystals are made up of layers, or "planes" of atoms, perfectly stacked in an ordered pattern. Because this surface has been cut at a slight angle to the crystal planes, it appears "stepped" (we call this type of surface a vicinal surface). Modern scanned-probe microscopes, such as the STM, allow us to see the atoms at the surface of a crystal, producing images very similar to this one.

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    • » Electron Microscopy

Shared Experimental Facilities (SEF)

Transmission Electron Microscopy Facilities

Overview:

Two powerful transmission electron microscopes (TEM) provide structural and compositional analysis of hard and soft materials with sub-nanometer resolution. These TEM's are integrated with additional microscopy (SEM, AFM) and sample preparation facilities in the University's central NISPLAB.

Instrumentation:

JEOL JEM 2100 Field Emission TEM/STEM
Specifications:	Electron Gun: ZrO/W(100) field emission Resolution: 0.19 nm (point-to-point), 0.10 nm (lattice) Spot Size: 2-5 nm (TEM mode); 0.5 - 2.4 nm (analytical mode) Two CCD Cameras
Analytical Modes:	Scanning TEM (Bright & Dark Field); Resolution: 0.2 nm (lattice) Energy-Dispersive X-ray Spectrometer (EDS) Electron Energy Loss Spectrometer (EELS) Energy Filter TEM (EFTEM)
JEOL JEM 2100 LaB6 TEM
Specifications:	Electron Gun: LaB6 thermionic emission Resolution: 0.23 nm (point-to-point), 0.14 nm (lattice) Spot Size: 20 - 200 nm (TEM mode), 1.0 - 25 nm (analytical mode) Specimen Tilt: +/- 30o One CCD and One TV Cameras
Analytical Modes:	Conventional TEM Energy Dispersive X-ray Spectrometer (EDS) Tomography In-Situ TEM (with Special Holders) for:     High Temperature Heating TEM     Cryo-TEM     Lorentz Microscopy

Contact:

Nisplab Director

Dr. Wen-An Chiou

wachiou@umd.edu

(301) 405-0541

Contact Us | Page Last Updated: 05/01/09 | Site Map

Copyright 2009 University of Maryland MRSEC. Permission to redistribute the contents without alteration is granted to educational institutions for non-profit administrative or educational purposes if proper credit is given to the University of Maryland MRSEC as the source.

This material is based upon work supported by the National Science Foundation under DMR Grant No. 0520471. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.