|Sample Temperature Range||RT to < -170° C|
|Dewar Lifetime to Refill||4 hours*|
|Number of Electrical Contacts||9*|
||Direct Chip Contact|
|Settled Resolution at Minimum Temperature
||Up to TEM resolution|
|EELS / EDS Compatible||Yes|
|TEM Compatibility||TFS/FEI, JEOL, Hitachi|
Hummingbird Scientific’s Cryo-Biasing TEM Sample Holder enables researchers to conduct in-situ electrical biasing experiments of materials at cryogenic temperatures. The combination of the liquid-nitrogen Dewar with a built in heater allows the temperature of the sample to be set at a desired range and controlled with closed-loop controller from -170C to room temperature.
Example research applications of this holder include transport measurements in quantum materials like:
- Emergent monopoles
- Topological insulators
How It Works
The Cryo-Biasing TEM Holder cools the sample using a liquid nitrogen Dewar and can control sample temperature with the built-in heater to make the sample less cold. The combination of the temperature sensor at the sample with a biasing and temperature controller and software allows the user to control both the temperature and the biasing signals to the sample during the experiment.
Chip loading is performed using a Direct Chip Insertion mechanism that features a chip that is directly inserted into the holder via a proprietary connector with 9 electrical contacts. The sample is prepared directly on the standard sample substrate chip. Pre-patterned metal leads lead up to the electron transparent membrane or holes in the substrate onto which the sample is built. We also offer dedicated FIB sample preparation chips. Holder consumables are available for customers in our webstore.Edit
The 1950-series Cryo-Biasing TEM Sample Holder also features a range of options:
- Wide range of biasing power-supply options. Contact us to find out which one suits your needs best.
- Specialized sample biasing substrates – including ones for easy FIB lift-out sample prep
Accessories available for your cryo-biasing holder:
- MEMS heating/biasing controller
- Wide range of biasing power-supply options. Contact us to discuss the best option for your range of applications.
- Specialized sample biasing substrates – including ones for easy FIB sample prep
- Vacuum Tip Cover
Real-time transport properties of materials observed at cryogenic temperature
There has been a significant scientific interest in studying transport behavior of material at cryogenic temperature in real-time. Hummingbird Scientific’s cryo-electrical biasing holder enables researchers to perform in-situ TEM experiments in which they concurrently cool their sample to liquid nitrogen (LN2) temperatures and apply electrical stimuli in real-time. This new capability shows promise in the study of quantum materials with high Curie temperatures (Tc) and degradation behavior of batteries at extreme environment conditions.
Image Right: Top: In-situ TEM temperature cool down and stability (~4 hour Dewar life) along with high resolution imaging (Au particle) at -167°C in the Cryo-Biasing TEM holder in a JEOL 2100 200 kV LaB6 TEM . Bottom (Courtesy of UCSD/Battery500 Consortium): Electrical biasing nanowire in which nanowire sits between the ridge of a FIB-biasing chip at low temperatures in the Cryo-Biasing holder. A constant current experiment on the nanowire in the Cryo-Biasing holder showing voltage drop as the reaction proceeds.Edit