|Tilt Range||Up to ± 45° depending on objective pole||Up to ± 20° (alpha and beta) depending on objective pole|
|Contact Type||Direct Chip Contact||Direct Chip Contact|
|Max Operating Temperature||> 1000°C||> 1000°C|
|Settled Resolution at 1000°C||Up to TEM resolution||Up to TEM resolution|
|Temperature Stability||+ 100 hours||+ 100 hours|
|Temperature Measurement||4-point resistance sensing||4-point resistance sensing|
|EELS / EDS Compatible||Yes||Yes|
|TEM Compatibility||TFS/FEI, JEOL||TFS/FEI, JEOL|
Hummingbird Scientific’s heating + biasing platform is supported by our microfabrication team. All our MEMS chips are designed, fabricated, and tested in-house.
Our fabricated MEMS chips-based microheaters provide:
- Temperatures > 1000°C
- 4-point resistance sensing
- > 100 hours of temperature stability
- Large field of view
- Compatibility with electron-based spectroscopy (EELS and EDS)
Learn more about our microfabrication facilities here.
Hummingbird Scientific’s in-situ TEM MEMS Biasing/Heating Sample Holder allows users to heat and/or electrically bias their sample inside the TEM. Heating can be performed to > 1000°C and in closed loop control with an on-chip sensor. The system features:
- Direct chip contact insertion mechanism—no fragile probes involved
- Single and double tilt configurations
- Standard MEMS chip biasing/heating with 9 contacts
- 4-point temperature sensing method
- Shielded electrical cables for low current measurements
- Integrated heating and voltage source meter controller
- Intuitive graphical user interface
Hummingbird’s Scientific heating + biasing sample holder has 9 contacts (standard). All electrical contacts are available for non-heating biasing experiments with our biasing MEMS chips. While using the heating + biasing capability with our heating-biasing MEMS chips, four contacts are used for heating and sensing; the remaining five contacts are available for biasing the sample. Hummingbird Scientific’s graphical user interface features intuitive controls for heating and biasing functions, including temperature-set point and voltage sweeps. Custom camera integration options are available.
All our MEMS chips are designed, fabricated, and tested in-house, and are available in our web store.Edit
Accessories available for your gas-flow holder:Edit
Segregation of MoS2 layers at high temperature
Researches at the University of Pennsylvania transformed few-layers of MoS2 with residual polymers from the transfer process into a 2D material with well segregated areas formed of either pure MoS2 or carbon based-composites. The segregation happens at temperature > 1000 °C. Energy-dispersive X-ray spectroscopy (EDS) confirmed the chemical content of each segregated area. The example shows a dark-field STEM image at a temperature of 1000 °C, together with the EDS map proving the material segregation.
Data provided by Dr. Deep Jariwala and Dr. Eric Stach from the the University of Pennsylvania.Edit
Customization & Service
|Khim Karki, Victoriea L. Bird, Daan Hein Alsem, and Melissa K. Santala. “In Situ TEM Observation of Crystallization in Phase-Change Material,” Microscopy & Microanalysis (2018)||Abstract|
|Victoriea L. Bird, Al J. Rise, Khim Karki, Daan Hein Alsem, Geoffrey H. Campbell, and Melissa K. Santala. “Mapping Crystallization Kinetics of Phase-Change Materials Over Large Temperature Ranges Using Complementary In Situ Microscopy Techniques,” Microscopy & Microanalysis (2018)||Abstract|