Air-free Transfer
| 1580 Series | Biasing Transfer | 3 mm Sample Transfer |
| High Vacuum Transfer |
Yes | Yes |
| Inert Gas Transfer |
Yes | Yes |
| Number of Electrical Contacts | 9* | 0 |
| Contact Type | Direct Chip Contact | N/A |
| Settled Resolution | Up to TEM Resolution | Up to TEM Resolution |
| High Temperature On-Chip Sample Heating | Optional | No |
| EELS/EDS Compatible | Yes | Yes |
| TEM Compatibility | TFS/FEI, JEOL | TFS/FEI,JEOL |
Overview
Hummingbird Scientific’s protective atmosphere Air-Free Transfer TEM Sample Holders enable transfer of air-sensitive samples from the preparation chamber to the TEM inside the holder, either in high vacuum, or in inert gas conditions. Example applications of this holder are in-situ materials experiments with air sensitive materials for:
- Solid-state electrolyte battery materials
- Nano-scale semiconductor materials
This holder comes in two versions: one is a transfer electrical biasing TEM holder that has 9 electrical contacts and uses chip samples and the other version of the holder that can transfer and image standard 3mm grid samples into the TEM.
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How It Works
The protective environment Air-Free Transfer TEM holders protect your TEM sample from exposure to air between the preparation chamber and the TEM when the sample is air sensitive.
After the TEM sample chip or 3 mm grid is loaded in the TEM holder tip inside the preparation chamber (e.g. a glove box) the entire tip of the holder with the sample retracts into the body of the holder and is hermetically sealed to keep inert gas or a high vacuum environment around the sample.
Once inside the TEM, the sample chamber can be opened to allow TEM imaging and/or in-situ TEM experiments with the sample.
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Options
The 1580-series Air-Free Transfer-Biasing TEM Sample Holder features a range of options:
- 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
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Vacuum/inert gas transfer, 9 contact biasing and high resolution imaging
To perform a successful transfer of an air-sensitive sample from a preparation chamber to the TEM it is important to consider the best environment to keep the sample free of damage. Some air-sensitive samples transfer best under high vacuum environments, whereas others are best transferred in inert gas conditions. Hummingbird Scientific’s Air Free TEM Transfer Holders are design such that they can hold both a positive pressure over atmosphere for an inert gas transfer (Figure Top Left) as well as can hold high vacuum during a high vacuum transfer (Figure Bottom Left).
The holder combined air-free transfer with high-stability imaging (Figure Top Right – taken with JEOL 2100 200 kV LaB6 TEM) and 9 contact electrical biasing contacts on the chip (Example in-situ TEM data shown in Figure Bottom Right) and 3 mm grid version of the holder, this makes the holder excellently suitable for applications like in-situ or standard TEM of air-sensitive solid-state energy storage device materials.
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