In Situ TEM Heating

Real-time imaging of thermal dynamics

The Wildfire In Situ Heating Series enables researchers to perform thermal studies in a controlled and stable environment within your TEM. Catering for a variety of application spaces, the Wildfire In Situ Heating Series transforms your high-end TEM from a static imaging tool to a multi-functional laboratory.






Temperature Stability

Wildfire Application Fields

LowD Materials

Thermal stability
Defects formation
Morphology evolution


Phase transitions
Structural evolution
Thermal degradation

Soft matter

Thermal behavior
Thermal decomposition
Surface properties

The Wildfire System


The Wildfire system consists of 4 main components:

  1. Nano-Chip
  2. Sample holder
  3. Heating control unit
  4. Control software

Get more from your TEM, 3 reasons to choose for Wildfire

Investigating materials while changing temperature expands the application space of conventional TEM and enhances its already powerful imaging capabilities. The Wildfire system allows for researchers to heat from room temperature to 1,300 °C with the ultimate temperature control and ultimate sample stability in all directions. The stability of the Wildfire system ensures that the full resolution and analytical performance of every TEM can be maintained while observing sample dynamics at elevated temperature.

Reason 1:

Experiment: Thermal degradation of perovskite solar cell

Obtaining the ‘game changing’ experimental results is the goal of any researcher – academic or industry. The team at Cambridge University focusing on energy related materials used the Wildfire system to study perovskite solar cells and their degradation processes during heating. These solar cells have become increasingly popular, however, the stability and lifetime of such devices at elevated temperatures are of concern. In situ TEM was used to understand the changes in morphology and chemical composition, leading to an improved understanding of the degradation evolution and 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 strongly linked to atomic arrangement and its transformation. In this example Ru nanoparticles supported on silica are heated to 1300 °C using a DENSsolutions Wildfire system. At that temperatures, the SiO2 sphere evaporates and the Ru nanoparticles become very mobile. The emphasized nanoparticle changes from round to square. This shape change can be studied in detail, due to technology behind DENSsolutions heating systems which ensures high sample stability, sub-Å resolution and therefore enables deeper understanding of the processes involved,

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

Reason 3:
High temperature

Chemical analysis while heating is extremely important to understand the dynamics of temperature-induced transformations High quality EDS analysis at elevated temperatures is challenging due to the intense generation of infrared radiation during heating which disturbs the X-Ray spectral acquisition. DENSsolutions provides the technology and the  experimental evidence thatin situ EDS at elevated temperatures is reliable and robust technique across a large temperature range. For the first time it was shown that EDS analysis is possible even at 1000 °C.

Acquired on a Wildfire S3. Maps courtesy of Bruker


Sample carrier for real-time thermal studies

The Nano-Chip is the heart of the Wildfire system and allows fast heating and quenching with the ultimate three dimensional stability.  The 4-point-probe method enables local measurement of the temperature with fast feedback for immediate stabilization and accurate temperature.

Local Sensor
RT – 1,300 °C
Ultimate in Stability

Sample Holder

Bringing the ‘in situ’ to your TEM

Double Tilt
Mechanical Stability
EDS Optimized

The Wildfire range of Sample Holders is optimised for specific application areas of research. Options include alpha tilt range up to 70° and beta tilt range up to 25°. All systems share EDS optimised design and a hassle free Nano-Chip loading.

Software & Hardware

A seamless ‘plug & play’ system for total control

The Digiheater Software provides the user with full control over the temperature environment. The synergy between hardware and software provides a very accurate and fast way to control the temperature environment.

Gatan GMS3 Integration

Synchronised stimulus & data for easier analysis

DENSsolutions & Gatan have partnered to integrate the Wildfire system with the GMS3 software package creating the Wildfire In Situ Plug-in. Optimised for in situ TEM experiments, the integrated plug-in provides researchers with total control over the in situ stimuli, camera settings, images and more!

Some great work from our customers:


“In-situ Transmission Electron Microscopy is one of the most exciting avenues for future breakthroughs in the characterization of dynamic processes in nano scale materials and devices. The DENSsolutions sample heating systems have performed impressively in experiments carried out in the Ernst Ruska-Centre.” Professor Rafal Dunin-Borkowski

Director, Ernst Ruska-Centre (ER-C) Forschungezentrum Jülich, Germany

“The temperature accuracy and spatial stability of the DENSSolutions heating holder are truly impressive – much better than alternatives we tried.  Our research on liquid dynamics with time-resolved diffraction would be impossible without it.” Professor Paul Voyles

Materials Science and Engineering University of Wisconsin-Madison, USA

“The DENSsolutions holder impressed me with high resolution imaging and extreme stability at high temperatures. It is exciting that the picture taken with the DENSsolutions holder shows superior performance compared to other holders. As long as we have got the DENSsolutions holder, we have got the in-situ world spinning in our hand.” Professor Xiaoyan Zhong

Tsinghua University Beijing, China

“In-situ TEM provides a new dimension in dynamic structural studies of a range of technologically important materials. The Department of Materials at Oxford will use the DENSsolutions sample heating holder in a number of projects related to catalysis and low dimensional carbon materials. We have chosen this solution for its unrivaled stability and control.” Professor Angus Kirkland

Professor of Materials University of Oxford, United Kingdom

Frequently Asked Questions

What is the tilt range of the Wildfire system?
This tilt range is dependent on the pole-piece gap of your TEM. Each of these tilt ranges are specified in the brochure. Here is the summary based on the largest pole-piece: Wildfire S3: Alpha tilt ±30°, Wildfire S5: Alpha tilt ±70°, Wildfire D6: Alpha & Beta tilt ±25°.
What is the best achievable resolution at elevated temperature?

The resolution of 0.6 Å can routinely be achieved at 1000 °C. The resolution is dependent on your TEM; however, the achievable resolution at elevated temperature will be as good as for your standard TEM holder.

What is the temperature range for the Wildfire system?
The Wildfire system allows any temperature between RT to 1,300 °C.
Is Wildfire compatible with EDX?
Due to small heater using only a few mW of power to heat to elevated temperatures, EDX signal can now be obtained at elevated temperatures up to 1000 °C. Performance is dependent on your TEM/EDS setup.
Can a Wildfire system be used for biasing experiments?
We support customers in upgrading their Wildfire D6 systems to perform biasing experiments. This is the Lightning D6+ Upgrade. In the case that the customer develops their own MEMS devices for biasing experiments, the Wildfire holder is able to be used in conjunction with these ‘home-made’ MEMS devices.

Download the Wildfire brochure

For more information on workflow, applications and specifications.

Contact us

Feel free to contact us with any further questions.

Request a Demo or Quote

Request a quotation or demonstration at your lab.

Contact us

Feel free to contact us with any further questions.

Request a Demo or Quote

Request a quotation or demonstration at your lab.