In Situ TEM Heating for Real-Time Imaging

The Wildfire In Situ Heating series from DENSsolutions allows scientists to carry out thermal studies in a stable and controlled environment within the TEM. The Series caters to a range of applications, and converts a user’s high-end TEM from a static imaging tool into a multifunctional lab.

Wildfire Application Fields

  • Nanotechnology
  • LowD materials
  • Soft matter systems
  • Materials for energy applications
  • Materials engineering

Obtain More from TEM — Three Reasons to Select Wildfire

The analysis of materials while simultaneously altering the temperature expands the scope of application of the conventional TEM, and improves its already strong imaging capabilities. The Wildfire system enables scientists to heat from room temperature to 1300 °C with ultimate sample stability and maximum temperature control in all directions.

The Wildfire system’s stability guarantees that the analytical performance and total resolution of all TEMs can be maintained during the observation of sample dynamics at higher temperatures.

Reason 1

High-Impact Publications

Experiment: Thermal Degradation of Perovskite Solar Cell

All researchers aim to achieve “game-changing” experimental results — academic or industry. With a focus on energy-related materials, a team of researchers at Cambridge University used the Wildfire system to analyze perovskite solar cells and their degradation processes while heating. These solar cells are becoming popular to a greater extent; however, the lifetime and stability of such devices at higher temperatures remain an issue.

In situ TEM was used to comprehend the variations in chemical composition and morphology, thereby gaining better insights into the degradation evolution, and culminating in the Nature Energy publication.

Heat-induced degradation of perovskite solar cells. G. Divitini, et al. University of Cambridge, Nature Energy 2016. DOI: 10.1038/nenergy.2015.12

Reason 2

Real-Time Dynamics

Behavior at the macroscale is very much dependent on the arrangement of atoms and its alteration. Here, Ru nanoparticles supported on silica were heated to 1300 °C using a DENSsolutions Wildfire system.

At such high temperatures, the SiO2 sphere evaporates and the Ru nanoparticles turn highly mobile. The shape of the highlighted nanoparticle alters from round to square. This change in shape can be analyzed in detail using the technology underlying heating systems from DENSsolutions, which guarantees high sample stability and sub-Å resolution. Consequently, this allows a better understanding of the processes taking place.

Courtesy of Gatan. Acquired with Wildfire D6 (now H+ DT) and Gatan OneView IS camera on a Thermo Fisher Scientific (FEI) Tecnai TF20.

Reason 3

High-Temperature EDS

Chemical analysis while heating is highly crucial to comprehend the dynamics of temperature-induced transformations. High-quality EDS analysis at higher temperatures is difficult to carry out because of the strong generation of infrared radiation while heating, which disrupts the X-ray spectral acquisition.

DENSsolutions offers the technology and the experimental proof that in situ EDS at higher temperatures is a powerful and reliable technique spanning a wide temperature range. For the first time, it has been demonstrated that EDS analysis can be achieved even at 1000 °C.

Acquired on a Wildfire S3. Maps courtesy of Bruker.

Acquired on a Wildfire S3. Maps courtesy of Bruker.


  • JEOL
  • FEI/Thermo Fisher Scientific

In Situ TEM Heating for Real-Time Imaging

Wildfire Nanochip
Wildfire Sample Holder Tip
Wildfire Sample Holder
Wildfire System

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