|1300 Series – Multi-Channel|
|Pressure Range at Sample||10-6 mbar up to 1.5 atm|
|Experimental Gas or Vapor Inlets||3–8*|
|Integrated Gas Analysis Capability||Yes|
|Holder Cleaning||Bakeable to 160° C|
|EELS / EDS Compatible||Yes|
|TEM Compatibility||TFS/FEI, JEOL, Hitachi, Zeiss|
Our in-situ TEM gas cell specimen holder allows researchers to study material behavior in gases and at elevated temperatures (>1000°C), obtaining atomic resolution images of gas-solid interactions at real-world reaction temperatures and pressures. Gases or vapors are introduced to the microfabricated environmental cell via the gas delivery system. The multi-channel gas delivery system has a single small-footprint box that encompasses all the components in one chassis. 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 MEMS 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. Now also with custom data/image integration options.
Sample research applications for which realistic reaction conditions can be created in the gas environmental cell are:
- Gas catalysis
- Fuel-cell research
- Growth of nano-structures
- Thin film 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 gases to an environmental cell at the same time. All hardware is enclosed in a single chassis with small footprint.Read MoreEdit
Our thin-film heating system for the gas holder discretely heats samples in the gas cell to > 1000ºC. Low-drift, high image stability and long lifetimes > 160 hours make the heating system not only robust, but allows tracking of the area of interest while imaging at high-magnification.
Heating is controlled via a custom-designed control box and software featuring closed-loop temperature control and four-point probe temperature sensing from an on-chip sensor.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 (<1e-6 mbar), and a glass viewing port for the holder tip.Read MoreEdit
Atomic dynamics of Ag/AgCl nanocatalyst
Atomistic interaction of gas-solid phase is important to understand the working mechanism of various catalyst materials. This is specifically the case for heterostructures with different structures. Researchers at Argonne National Laboratory used Hummingbird Scientific’s Gas TEM system and observed atomic interaction of Ag/AgCl heterostructures during redox processes. In these experiments, Ag/AgCl nanocatalysts were first reduced to Ag, and then Ag was oxidized to different phases of silver oxide under different O2 partial pressures. Ag2O formed at low O2 partial pressure, whereas AgO formed at atmospheric pressure.
Reference: Yuzi Liu et al. Visualizing Redox Dynamics of a Single Ag/ AgCl Heterogeneous Nanocatalyst at Atomic Resolution. ACS Nano (2016). Abstract
Copyright © 2016 American Chemical SocietyEdit
Reduction dynamics of Ag/AgCl under electron beam. Image copyright © 2016 American Chemical Society
Customization & Service
|Karalee Jarvis, Chih-Chieh Wang, María Varela, Raymond R. Unocic, Arumugam Manthiram, and Paulo J. Ferreira. “Surface Reconstruction in Li-rich Layered Oxides of Li-ion Batteries,” Chemsitry of Materials (2017)||Abstract|
|Jeffery A. Aguiar, Nooraldeen R. Alkurd, Sarah Wozny, Maulik K. Patel, Mengjin Yang, Weilie Zhou, Mowafak Al-Jassim, Terry G. Holesinger, Kai Zhu and Joseph J. Berry. “In situ investigation of halide incorporation into perovskite solar cells,” MRS Communications (2017)||Abstract|
|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)||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|