|1300 Series – Single Channel||1300 Series – Multi-Channel|
|Pressure Range at Sample||1 atm up to 1.5 atm||10-6 mbar up to 1.5 atm|
|Experimental Gas Inlets||1||2–8*|
|Gas Analysis Capability||No||Yes|
||All Metal||All Metal|
||3 or 4 contact (depending on model)||3 or 4 contact (depending on model)|
||Up to 800°C||Up to 800°C|
|Holder Cleaning||Bakeable to 160° C||Bakeable to 160° C|
|EELS / EDS Compatible||Yes||Yes|
|TEM Compatibility||FEI, JEOL, Hitachi, Zeiss||FEI, JEOL, Hitachi, Zeiss|
Our in-situ TEM gas cell specimen holder allows researchers to study material behavior in gases and at elevated temperatures, obtaining atomic resolution images of gas-solid interactions at real-world reaction temperatures and pressures. Gases are introduced to the microfabricated environmental cell via one of our optional dedicated gas delivery systems. Cell pressure is fully user-controlled and can be adjusted from high vacuum to above atmospheric pressure. Local specimen heating is provided via an integrated thin film heater with a temperature sensor calibrated for accurate readings. To ensure clean gas delivery, the entire holder can be baked at up to 160°C.
- Gas catalysis
- Fuel-cell research
- Growth of nano-structures
- Atomic layer deposition
Hummingbird Scientific’s gas-flow holder comes with either a single-channel or a multi-channel delivery system.
Single-channel gas delivery system
Hummingbird’s single-channel gas delivery system delivers a single pressure-controlled gas to the environmental cell.
Multi-channel gas delivery system
Hummingbird Scientific’s multi-channel gas delivery system is fully configurable and scalable, designed to deliver multiple pressure-controlled gases to an environmental cell at the same time.Read MoreEdit
Our thin-film heating system for the gas holder discretely heats samples up to 800ºC. Heating is controlled via a custom-designed control box featuring closed-loop temperature control and software that interfaces with a calibrated sensor on the chip.Edit
Careful preparation of your samples and system are essential for effective use of environmental holders. A critical component of any holder system is a high-vacuum leak check station.
Our high-vacuum pumping station is a compact, all-in-one vacuum storage and seal-checking mechanism for TEM specimen holders. The station features short pumping and venting times, a low base pressure (10-6mbar), and a glass viewing port for the holder tip.Read MoreEdit
Kirkendahl effect in Co nanoparticles
Researchers at the Lawrence Berkeley National Laboratory and Hummingbird Scientific have directly imaged the process of Co nanoparticle oxidation and reformation as Co is heated to 250°C and 350°C. The study shows the specific morphological changes that occur during these processes, shedding light on their governing mechanisms.
Right: Formation of hollow core oxide shells when Co nanoparticles are heated from 150°C to 250°C in 1 bar of flowing oxygen.
Far Right: Coalescence of the oxide shells when particles are heated from 250°C to 350°C.
Reference: H.L. Xin, K. Niu, D.H. Alsem and H. Zheng. “In-Situ TEM Study of Catalytic Nanoparticle Reactions in Atmospheric Pressure Gas Environment,” Microscopy & Microanalysis 19 (2013) pp. 1558. Abstract
Copyright © Microscopy Society of America, 2013Edit
Customization & Service
|Jeffery A. Aguiar, Sarah Wozny, Terry G. Holesinger, Toshihiro Aoki,d Maulik K. Patel, Mengjin Yang, Joseph J. Berry, Mowafak Al-Jassim, Weilie Zhou and Kai Zhu, “In situ investigation of the formation and metastability of formamidinium lead tri-iodide perovskite solar cells,” Energy Environ. Sci., (2016)||Abstract|
|Yimin A. Wu, Liang Li, Zheng Li, Alper Kinaci, Maria K. Y. Chan, Yugang Sun, Jeffrey R. Guest, Ian McNulty, Tijana Rajh, and Yuzi Liu, “Visualizing Redox Dynamics of a Single Ag/AgCl Heterogeneous Nanocatalyst at Atomic Resolution,” ACS Nano, (2016), 10 (3), pp 3738–3746||Abstract|
|T.G. Holesinger, S. Dey, J.A. Aguiar, P.A. Papin, J.A. Valdez, Y. Wang, B.P. Uberuaga, R.H. Castro. “Correlative and dtnamic in-situ S/TEM characterization of heavily irradiated pyrochlores and fluorites,” Microscopy and Microanalysis Meeting (2015)|
|E.A. Stach, Y. Li, S. Zhao, A. Gamalski, K. Chen-Weigart, R. Tappero, J. Chen. “Characterizing working catalysts with correlated electron and photon probes,” Microscopy and Microanalysis Meeting (2015)|
|J. Murphy, N.J. Salmon, D.H. Alsem. “Imaging Nano-Structures at High Temperature and Pressure Using a Windowed TEM Gas Cell Speciment Holder,” Microscopy and Microanalysis Meeting (2015)|
|J. Murphy, N.J. Salmon, D.H. Alsem. “Imaging of Nano-Structures at High Temperatures and Pressures above One Atmosphere Using a Windowed TEM Gas Cell Specimen Holder,” Microscopy and Microanalysis Meeting (2015)|
|Y. Li, D. Zakharov, S. Zhao, R. Tappero, U. Jung, A. Elsen, Ph. Baumann, R.G. Nuzzo, E.A. Stach & A.I. Frenkel, “Complex structural dynamics of nanocatalysts revealed in Operando conditions by correlated imaging and spectroscopy probes”. Nature Communications 6 (||Abstract|
|R. Colby, D.H. Alsem, A. Liyu, B. Kabius “A method for measuring the local gas pressure within a gas-flow stage in situ in the transmission electron microscope ” Ultramicroscopy, Vol. 153 (2015) pp.55-60.||Abstract|
|D.H. Alsem, N.J. Salmon, R.R. Unocic, G.M. Veith, and K.L. More. “In-situ liquid and gas transmission electron microscopy of nano-scale materials,” Microscopy and Microanalysis 18:S2 (2012) pp. 1158-1159.||Abstract|
|H.L. Xin, K. Niu, D.H. Alsem, and H. Zheng. “In-Situ TEM Study of Catalytic Nanoparticle Reactions in Atmospheric Pressure Gas Environment,” Microscopy and Microanalysis 19:6 (2013) pp. 1558‒1568.||Abstract|
|B. Colby, D.H. Alsem, and B. Kabius. “Estimating the Local Gas Pressure in a Gas Flow Cell Stage In-Situ using Electron Energy Loss Spectroscopy,” Microscopy and Microanalysis 19:S2 (2013) pp. 474||Abstract|
|D.H. Alsem, R. Colby, S.W. Chee, B. Kabius and N.J. Salmon, “In-situ Characterization of Catalytic Reactions Using Environmental Cell TEM,” Materials Research Society fall meeting, Boston, MA, December 2013.||Abstract|
|D.H. Alsem, R.R. Unocic, G.M. Veith, K.L. More and N.J. Salmon. “Transmission Electron Microscopy of Nano-Scale Materials in Liquid and Gas Environments,” 12th European Microscopy Conference, Manchester, England, September 2012.||Abstract|