Heat a catalyst and it stops being a static picture. Nanoparticles migrate and coalesce. An oxide support reduces. A facet reorganizes. Coke builds up, then burns off. In a huge number of materials problems, the interesting science happens during the temperature ramp — not before it and not after it. If you only image the sample cold, you’re reconstructing the story from two snapshots and guessing at everything in between.
In-situ laser heating lets you watch the middle. Pair it with a tabletop SEM and EDS and you can watch a heat-sensitive sample transform in real time, at the microscale, while tracking how its composition shifts as it changes — without tying up, dirtying, or risking a half-million-dollar microscope to do it.
The system: a laser focused at the electron-beam coincident point
The platform behind this is the Waviks Vesta™ optical system. The core idea is simple and powerful: Vesta delivers a focused laser to the exact point the electron beam is interrogating — the coincident point. You heat, excite, and probe the same feature you’re imaging, with no sample transfer, no re-registration, and no compromise to electron-optical performance.
It’s a plug-and-play addition, not a rebuild. Vesta port-mounts through a sapphire window with its optics at atmospheric pressure, so there are no permanent vacuum modifications to the microscope. A programmable nanomanipulator lets you reposition the laser — and even swap wavelengths — without breaking vacuum.
The numbers that matter:
- ~10 µm focused spot at the coincident point — you heat the feature, not the whole stage
- Over 1000 °C local temperature, from nanosecond pulses through continuous wave
- Multi-wavelength, UV through IR — modular and swappable
- Drift as low as 2.2 nm/min during heating (measured in STEM), no drift correction required
- Vacuum compatible to 10⁻¹⁰ torr
- Python SDK for scripted, automated, and AI-driven workflows
The tabletop angle — and why it’s the whole point
Vesta runs on full-size SEMs, on TEM and STEM instruments, and on FIB/dual-beam systems. But here’s the part most people don’t know: the SEC SNE-Alpha is the only desktop SEM that supports the full Vesta capability set — a configuration NanoImages offers exclusively in the US.
That matters because of a problem every facility manager already feels in their gut: you do not want to run dirty, outgassing, sample-evaporating heating experiments inside a $500K-plus field-emission instrument. Heating releases material, and on a shared flagship that material lands on pole pieces, detectors, and windows — meaning downtime, a service call, and a very unhappy lab. So the experiments get restricted, scheduled around, or quietly discouraged. The instrument most capable of the imaging is the one you’re least allowed to get messy with.
Putting Vesta on a tabletop changes the math. The heating is localized and non-contact, which protects sensitive detectors from thermal damage in the first place — and the platform itself is a dedicated instrument you can run hard and service yourself, not a flagship you’re afraid to touch. You get the live, microscale view of the transformation on a system you actually own and control.
Watch chemistry, not just shape
Imaging tells you the morphology is changing. To know why, you need composition and optical signatures — and you can get both at the same coincident point.
EDS tracks elemental change live: an oxide losing oxygen as it reduces, a volatile element leaving the surface, two phases segregating. And because Vesta is an optical platform, it also brings point spectroscopy — Raman, cathodoluminescence (CL), and photoluminescence (PL) — to the electron-beam point of analysis, revealing phases, stress states, defects, and bandgap information that SE and BSE imaging alone can’t resolve. For semiconductor failure analysis and 2D-material work, that extra layer is often the whole answer.
Real temperatures, measured — not guessed
The first question any reviewer asks about in-situ heating is “how do you know the temperature?” Vesta supports multi-method thermometry rather than a single hand-wave: excitonic EELS (±20 °C for 2D materials), Raman (±10–50 °C), and IR pyrometry (above 400 °C), enabling quantified studies from cryogenic conditions up past 1000 °C.
How it compares
Versus MEMS heating chips: Vesta extends them rather than replacing them. Standard eChips deliver uniform resistive heating up to ~1200 °C continuous; Vesta adds spatially selective, wavelength-tunable optical heating, nanosecond pulse control, and spectroscopy and pulsed-laser deposition in the same session — and it works with MEMS chips and standard holders.
Versus integrated FIB laser systems: those are built for bulk material removal — millimeter-scale ablation at fixed wavelengths with blind positioning. Vesta has a different mission entirely: ~10 µm, sighted, high-photon-density delivery with modular UV-to-IR wavelengths that port-mounts across tabletop SEM, full-size SEM, FIB, and TEM.
What researchers use it for
Catalysis is a natural fit — sintering and coarsening of supported nanoparticles, reduction/oxidation cycling, coking and regeneration, all watched live. Beyond that, application work spans 2D materials, plasmonic nanoparticles, thin-film metallurgy, semiconductor defect and bandgap characterization, recrystallization and grain growth, dewetting, and e-beam nanofabrication. Because you can run multiple temperature experiments on a single sample, phase-diagram exploration that used to take weeks of separate runs collapses into one session.
The track record
Vesta is the product of years of NSF-funded development, refined alongside national laboratories and semiconductor manufacturers, with more than ten peer-reviewed publications in journals including ACS Photonics, Advanced Materials Technologies, and Small. It has been integrated on Nion UltraSTEM, high-resolution TEM, full-size SEM, FIB, and tabletop SEM systems. As our roundup of in situ SEM-Raman published studies shows, this is not a concept — it’s a deployed platform with a publication trail.
The real argument
In-situ heating used to belong to expensive, heavily-guarded systems, which meant most labs either didn’t do it or did it nervously. Putting laser heating on a tabletop SEM — the only desktop instrument that supports the full Vesta capability set — changes that. You get the live, microscale, compositionally- and optically-resolved view of your sample as it heats, on an instrument you can run hard, service yourself, and reconfigure without breaking vacuum.
Why dirty up the half-million-dollar microscope when you can watch the same transformation happen on a tabletop built for it?
NanoImages offers in-situ laser heating via Waviks Vesta on the SNE-Alpha tabletop SEM — as well as on new or existing full-size SEMs, TEM/STEM, and FIB systems. Each configuration is quoted per application. Contact NanoImages to talk through your samples and the right integration.