N. de Jonge, D. B. Peckys, G. J. Kremers, D. W. Piston. “Electron microscopy of whole cells in liquid with nanometer resolution”. Proceedings of the National Academy of Sciences (2009)
Enclosed Flow Cell Inside the TEM
The TEM Liquid Flow sample holder is the first in-situ liquid-phase TEM platform designed to image nanometer-scale liquid-phase reactions and transformations. Our patented precision-machined chip loading mechanism operates without screws, facilitating reproducible sample loading, self-aligning windows, and stable imaging without drift correction. This simplifies the hardware learning curve, workflows, and micrograph acquisition, guaranteeing reproducible sample preparation and in-situ TEM methodologies.
Advantages:
Designed for Advanced Nanoscale Liquid-phase Dynamics Research
Investigate mechanisms underpinning the dynamics of particle self-assembly, biomineralization and dissolution, corrosion, nanoparticle-MOF structures, temperature-dependent reactions and thin film electrochemistry in liquid environments.
Understand Mechanisms Behind Liquid-Phase Transformations
The transformations that occur at liquid-liquid and solid-liquid interfaces are often nanoscale and highly transient, but nanostructure design is highly dependent on the mechanisms that drive these transformations. The TEM Liquid Flow sample holder applies stimuli such as temperature, electrical bias, light exposure, and liquid mixing to uncover reaction pathways, structural transformations, and degradation mechanisms to develop and characterize the next generation of functional nanostructures.

Hummingbird Scientific designs, machines, assembles, tests, and services its products in-house. Our integrated engineering, machining, microfabrication, and applications teams enable rapid product development, custom modifications, and direct technical support throughout the life of the instrument. This vertically integrated approach allows researchers to adapt experimental platforms to unique scientific requirements while maintaining the performance and reliability required for advanced in-situ microscopy experiments.
The TEM Liquid Flow sample holder is a direct result of these capabilities, enabling reproducible true bulk electrochemical measurements combined with in-situ nanoscale imaging.
Need something unique? Our engineers can customize existing products or develop entirely new solutions to support specialized experiments and emerging research challenges.
Trusted by researchers worldwide, the Hummingbird Scientific TEM Liquid Flow sample holder has contributed to 30+ peer-reviewed publications from leading universities, national laboratories, and research institutions worldwide in Nature, Science, ACS Nano, Advanced Functional Materials, and other leading journals.
N. de Jonge, D. B. Peckys, G. J. Kremers, D. W. Piston. “Electron microscopy of whole cells in liquid with nanometer resolution”. Proceedings of the National Academy of Sciences (2009)

Achieve reproducible liquid-cell assembly with self-aligning windows and a screw-free sealing design

Load liquid-cell TEM chips and solutions in minutes using our industry-leading constant-compression tip sealing mechanism. The tight-tolerance chips fit perfectly into the precision-machined tip, repeatably self-aligning the SiN viewing membranes and evenly compressing the o-rings without relying on finnicky screws or alignment jigs. The precision-machined holder tip delivers consistent liquid-cell assembly, reducing setup complexity while improving experiment-to-experiment reproducibility and imaging reliability.

Simplify cleaning with removable and upgradeable holder tips that allow access for tubing replacement

Clean up after your experiment with ease so you can move on to the next one. The Hummingbird Scientific TEM Liquid Flow sample holder features a removable tip, allowing access for tubing replacement, cell orientation flipping to optimize for TEM or STEM imaging, and capability upgrades. An o-ring on the holder tip ensures vacuum compatibility across tip interface.

Image samples in continuous-flow or static liquid environments using a sealed microfluidic chip assembly

Perform in-situ liquid-phase TEM experiments under flowing or static liquid conditions while maintaining microscope safety, experimental flexibility, and reproducible imaging. The sealed microfluidic liquid-cell architecture supports a wide range of electrochemistry, catalysis, synthesis, and materials characterization applications.

Correlate electrochemical, heating, and imaging data across TEM, SEM, and X-ray microscopy platforms

Our liquid flow platform extends beyond TEM with compatible holders for SEM and X-ray microscopy platforms, enabling seamless correlative in-situ characterization across multiple length scales using the same electrochemistry chips. This integrated workflow combines real-time electroanalytical measurements with complementary imaging and spectroscopy, providing a more complete understanding of dynamic material behavior under realistic operating conditions.

Perform correlative spectroscopy and microscopy for detailed in-situ elemental analysis

The TEM Liquid Flow sample holder supports both EDS and EELS, enabling researchers to correlate applied conditions with real-time chemical and structural changes. Optimized liquid-cell geometries maximize X-ray collection efficiency while maintaining liquid thickness suitable for EELS acquisition.

Protect your TEM during liquid-cell experiments and streamline setup with rapid high-vacuum seal checking and optical inspection

Reliable in-situ liquid flow experiments begin well before the holder enters the microscope. Hummingbird Scientific's integrated pumping and seal-checking system helps researchers verify liquid-cell integrity, reduce contamination risk, and protect microscope vacuum performance.

Keep experiments moving with in-stock liquid-cell TEM chips designed for electrochemistry, liquid flow, heating, and multimodal microscopy workflows

Hummingbird Scientific manufactures liquid-cell TEM chips in our in-house microfabrication facility and maintains more than 60 standard configurations in stock for rapid delivery. Designed for in-situ TEM liquid-flow imaging, electrochemistry, and heating experiments, these chips are ready-to-use out of the box and require no additional cleaning. This means your experiments won’t get held up by long lead times for substrates. Multiple spacer, window, and electrode geometries as well as material options support applications including corrosion studies, battery research, and electrocatalysis, with made-to-order custom chips available for specialized experiments.
Enhance your in-situ experiments with advanced add-on functionalities

Add temperature-controlled liquid-phase TEM capabilities with homogeneous heating, precise temperature regulation, and near-drift-free in-situ imaging

The Integrated Liquid Heating system enables controlled thermal stimulation directly within the liquid cell for temperature-dependent in-situ TEM experiments. Individually calibrated microfabricated heating chips and closed-loop temperature control provide accurate, homogeneous heating up to the boiling point of your solution while maintaining stable imaging conditions.

Accelerate discovery with dual-flow liquid mixing for in-situ liquid phase TEM, capturing dynamic liquid-liquid reactions with greater control and flexibility

Optional dual-flow mixing configuration introduces two independent liquid streams into a single liquid-cell, enabling researchers to trigger reactions immediately before observation and capture transient processes as they occur.
The TEM Liquid Flow sample holder integrates a sealed microfluidic cell, user replaceable microfluidic tubing, multi-functional microfabricated substrates, 4 electrical biasing leads, and peripheral control hardware and software into a multi-stimulus liquid-environmental characterization tool. A sample is loaded onto a SiN viewing membrane and sealed inside of the cell. Imaging in the TEM is performed while the solution is circulated through the cell via a microfluidic liquid delivery system. [DA4.1]Dual-inlet tips, biasing leads, and heating/electrochemistry chips enable mixing, thermal, and electrochemical reactions to be imaged in-situ at the nanoscale.

To help you get the most from your liquid-cell holder, Hummingbird Control Software provides intuitive and precise control of closed loop liquid heating. Together, these software solutions enable faster setup, improved reproducibility, and more efficient liquid-phase TEM experiments.
A liquid flow TEM sample holder is an in-situ transmission electron microscopy sample holder platform that encloses a sample inside of a liquid cell using microfabricated chips, allowing liquid exposure and sample stimulation by heating and biasing all while imaging nanoscale processes inside the TEM.
Unlike benchtop electrochemistry, fully on-chip 3-electrode systems are limited by geometrical and physical realities of thin film electrodes. Peak shifting, scan artifacts, and electrode degradation plague all on-chip electrochemical experiments. Our Bulk Liquid Electrochemistry platform overcomes these limitations with bulk off-chip reference and counter electrodes.
The control software regulates and monitors sample parameters like temperature, biasing voltage, current, etc. during in-situ electron microscopy experiments. It allows users to set precise temperature, voltage, and/or current, run controlled parameter profiles, and observe parameter behavior in real time. The software also records time-based data, enabling accurate analysis and repeatable experimental workflows
Yes. The TEM Liquid Flow sample holder supports both EDS and EELS during in-situ experiments. Its EDS-optimized liquid cell design maximizes X-ray collection efficiency for reliable elemental analysis and mapping, while optimized microfluidic chips minimize liquid thickness to enable EELS measurements. Together, these capabilities allow researchers to correlate real-time structural changes with compositional and chemical information during dynamic liquid-phase transformations.
We supply a microfluidic liquid delivery system with the sample holder, either flow rate or pressure-controlled systems are available. Delivery system operation is covered in the liquid holder training.
Yes. Integrated liquid heating can be added for temperature-dependent liquid-phase TEM experiments, including studies of reaction kinetics, phase transformations, and particle synthesis, and temperature-dependent electrochemical behavior.
Yes. Optional dual-flow mixing introduces two independent liquid streams into the liquid cell, enabling researchers to trigger reactions and capture transient liquid-phase processes during TEM characterization
