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- Title
Novel MEMS-Based Gas-Cell/Heating Specimen Holder Provides Advanced Imaging Capabilities for In Situ Reaction Studies.
- Authors
Allard, Lawrence F.; Overbury, Steven H.; Bigelow, Wilbur C.; Katz, Michael B.; Nackashi, David P.; Damiano, John
- Abstract
In prior research, specimen holders that employ a novel MEMS-based heating technology (AduroTM) provided by Protochips Inc. (Raleigh, NC, USA) have been shown to permit sub-Ångström imaging at elevated temperatures up to 1,000°C during in situ heating experiments in modern aberration-corrected electron microscopes. The Aduro heating devices permit precise control of temperature and have the unique feature of providing both heating and cooling rates of 106°C/s. In the present work, we describe the recent development of a new specimen holder that incorporates the Aduro heating device into a “closed-cell” configuration, designed to function within the narrow (2 mm) objective lens pole piece gap of an aberration-corrected JEOL 2200FS STEM/TEM, and capable of exposing specimens to gases at pressures up to 1 atm. We show the early results of tests of this specimen holder demonstrating imaging at elevated temperatures and at pressures up to a full atmosphere, while retaining the atomic resolution performance of the microscope in high-angle annular dark-field and bright-field imaging modes.
- Subjects
PROTOCHIPS Inc.; TRANSMISSION electron microscopes; SCANNING electron microscopes; SILICON nitride; MICROFABRICATION
- Publication
Microscopy & Microanalysis, 2012, Vol 18, Issue 4, p656
- ISSN
1431-9276
- Publication type
Article
- DOI
10.1017/S1431927612001249