Producing Relevant Results for In Situ Environmental TEM System

Protochips Atmosphere Environmental system is the first commercially available in situ environmental TEM system that comes with a built-in mass spectrometer and flexible gas handling.

These features enable users to safely view previously unobserved dynamics in the TEM at atomic resolution under the most realistic pressures, temperatures, and gaseous settings.

Key Areas of Applications

  • Corrosion
  • Fuel cells and hydrogen storage
  • Heterogeneous catalysis

Overview of the Protochips Atmosphere Environmental System for TEM

Data collection can be expedited with an efficient and intuitive workflow that gets users the applicable, impactful results they need to fast-track their research.

Prepare Efficiently

A mini-environmental “reactor” can be rapidly and safely prepared for TEM, allowing users to maximize data collection time rather than waste it on hardware assembly.

  • One single-sealing gasket reduces the surface area where leaks are likely to form
  • Self-aligning parts allow rapid holder assembly
  • With just five steps, it can be learned and taught easily and quickly

Intuitive holder assembly that can be completed in 5 steps with perfect alignment each time.

Create Without Limits

The most accurate experimental environments can be prepared to produce more appropriate results.

  • The atmosphere allows users to add the most realistic gaseous environments because it is not restricted by the calibrations of mass flow controllers. Gas handling is achieved using Dalton’s Law of Partial Pressures and ultra-accurate pressure manometers, a technique known as Volumetric Blending that enables any gas to be precisely mixed and flowed through the system.
  • Alcohols, humidity, and other volatile organic vapors can be introduced in an accurate and reproducible manner for the first time.
  • Inert, metal-free heating element stops undesirable side reactions when heating up to 1000 °C.

Volumetric Blending is a robust technique that enables accurate mixing and flowing of a wide variety of gases independent of the mass of each constituent

Observe in Detail

It is possible to capture challenging specifics and analytical data with exclusive sample supports particularly designed for each STEM, TEM, and EDS mapping.

Onishi, Ichiro. et al. e-J Surf. Sci. Nanotech. 16 (2018) 286-288 JEOL Ltd.

Courtesy of University of Marburg - top image taken with a standard double tilt holder in vacuum, bottom image taken at 1 atmosphere of nitrogen, 220 °C in the Atmosphere closed cell holder.

Vary Precisely

Users can truly understand the impact of each environmental condition on their sample by precisely modifying each one of them, independent of one another.

  • For the first time, the flow rate can be modified to increase residence time, without impacting the experimental pressure
  • A good experiment requires modifying only a single variable at a time, otherwise, there is no way to find out which effects are credited to which experimental variables
  • Contrary to a homemade bubbler, users can accurately modify relative humidity via software, thus creating a reproducible experiment and inhibiting condensation

Copper nanoparticles under a redox environment created within the Atmosphere system: 45% Ar, 5% H2O vapor, 50% H2 400 °C 1 atm

Measure Instantly

The integrated residual gas analyzer (RGA) mass spectrometer allows users to monitor their experiment in situ without sacrificing imaging resolution.

  • Quick response times of less than 3 seconds allows easy correlation between TEM images and RGA data
  • High-resolution imaging during RGA operation is now possible with the RGA’s exclusive, vibration-free integrated vacuum system
  • Low dead volumes enable sensitive detection limits down to 50 ppm

Low dead volumes and short gas lines enable sensitive detection limits down to 50 ppm

Clean Thoroughly

Water, air, and residual experimental gases can be efficiently and effectively eliminated to achieve a clean, contamination-free starting environment without the need to exchange parts.

  • The holder can be cleaned thoroughly without having to remove the tubing or holder tip. This makes sure that the pole piece remains safe, and allows users to find their viewing window all the time.
  • Besides purging, the system can be pumped down to 30 mTorr and baked at 50 °C to eliminate even the most challenging residual gases from the smallest areas of the system.
  • Once eliminated, air and water should be kept out to avoid undesirable contamination with leak-tight stainless-steel joints that are tested for helium leaks prior to delivery.

Producing Relevant Results for In Situ Environmental TEM System

Volumetric Blending is a robust technique that enables accurate mixing and flowing of a wide variety of gases independent of the mass of each constituent
Onishi, Ichiro. et al. e-J Surf. Sci. Nanotech. 16 (2018) 286-288 JEOL Ltd.
Courtesy of University of Marburg
Copper nanoparticles under a redox environment created within the Atmosphere system: 45% Ar, 5% H2O vapor, 50% H2 400°C 1atm
Low dead volumes and short gas lines enable sensitive detection limits down to 50 ppm

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