A revolutionary technology for understanding chemical reactions
The Nano-Reactor is the MEMS based device that acts as a functional sample carrier enabling the gas-heating environment within the TEM. The Nano-Reactor, once loaded into the Climate Sample Holder, allows a defined amount of gas to be flowed through inert Nano-Reactor chamber where the sample temperature is controlled by an integrated micro-heater and temperature sensor. Replicating the real-world industrial chemical reactor, the Nano-Reactor allows sub-Angstrom resolution imaging and analysis of gas-solid reactions.
Easy Sample Preparation
Directly deposit your sample onto the Nano-Reactor
Loading the sample onto the MEMS based sample carrier called the Nano-Reactor, is easy and fast to perform. Catalyst nanoparticles are typically in powder form and are prepared in an ethanol solution for direct drop casting onto the Nano-Reactor’s electron transparent windows.
Replicating real-world chemical reactions on the nano-scale
Atomic Resolution Imaging
Observe catalyst dynamics with full S/TEM performance
Crossing the Pressure Gap
Observing the effects of pressure on sample dynamics
Temperature accuracy, stability and reliability
The Nano-Reactor’s micro-heater is based on the proven and well established DENSsolutions MEMS technology that offers superior performance in temperature accuracy, reliability and stability. The micro-heater is encapsulated in inert SiNx to ensure that the metal of the heater doesn’t interact with the gas or the sample. Through a process of Joule heating, an electric current is passed through the metal micro-heater creating a homogeneous temperature environment up to 1,000 °C. The center of the micro-heater has a homogeneous temperature area that surrounds each of the ten electron transparent windows where the S/TEM sample is supported and creates the homogeneous environment. The 4 contact design of the micro-heater allows for the 4-point-probe method of controlling the local temperature around the sample being studied – two contacts for heating and two contacts for measuring the local resistance of the micro-heater. The inherent physical advantage of a metal heater shows that resistance has a linear relationship to temperature, enabling the fast feedback to the electronics/software to accurately increase/decrease the temperature as desired by the user. Additionally, the 4-point-probe method compensates for any changes in the gas environment surrounding the sample as the fast feedback adjusts the power accordingly to counteract any change in thermal conductance and maintain the target temperature.
Monitoring heat dissipation & absorption
Consumable MEMS Device
Stay at the forefront of science with the latest in MEMS technology
Ensuring a clean and contamination free environment is crucial to every TEM experiment, which is why the Nano-Reactor has been designed as a consumable sample carrier. Therefore, the Nano-Reactor ensures reliability of results and prevents the data from being contaminated by particles with a high adhesion co-efficient (which are the majority) or the gases which have been in contact with the Nano-Reactor. Secondly, the DENSsolutions R&D team is continually developing and improving the Nano-Reactor as MEMS technology advances and this ensures the Climate user will always be at the forefront of in situ TEM technology.
Assembling Nano-Reactor & Tip
Fast and easy assembly with all tools included
The assembly of the Nano-Reactor into the Sample Holder tip is easy to perform (see video 1) and all required tools / components are included. Following sample preparation and feed through of the replaceable internal tubing, the Nano-Reactor is loaded into the precision made slot at the base of the Sample Holder tip. Small screws are used to lightly secure the Sample Holder tip together , before the Alignment Tool (see video 2) is used to align the electron transparent windows of the top chip (10 um ⌀) with those in the bottom chip (6 um ⌀). Finally, the screws are tightened and the Sample Holder is ready for testing in the Gas Supply System Vacuum Test Tube.
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