By Center for Functional Nanomaterials Brookhaven
This instrument is the first 80-300kV field-emission environmental transmission electron microscope to be installed in the US with an objective-lens aberration corrector. It has a spatial resolution of 0.08nm in the high-resolution phase contrast mode, and can achieve this resolution at unusually high pressures due to the differential pumping apertures and custom pumping arrangement that is incorporated with the system. The maximum gas pressure for the environmental-cell is about 20mbar for N 2, with other maximum pressures dependent on the atomic weight of the gas. As a result, this instrument is uniquely well-suited to image the fundamental mechanisms of catalysis and catalyzed nanostructure growth. The instrument also has scanning transmission imaging (STEM), magnetic imaging, and chemical analysis capabilities. In addition, a Lorentz lens and a bi-prism allows imaging electrostatic and magnetic potentials or fields in materials. The FEI Titan is also equipped with an energy dispersive x-ray spectrometer and an electron energy-loss image filter spectrometer. A mass-flow controlled catalytic reaction system capable of providing controlled pressures of gas mixtures will be installed in the near future.
