Transmission Electron Microscopy
Internal structural and crystallographic characterization with atomic resolution.
O que é MET
Uma técnica de análise avançada
Internal structural and crystallographic characterization with atomic resolution.
What sets us apart
We don't hand over a spectrum. We hand over the interpretation.
Any lab can return peaks and numbers. Our report reads the data. Three differences define what we deliver — illustrated below with a real, anonymized case.
Multiple techniques, one integrated report
We don't hand back five loose reports. We cross-reference every technique's results into a single reading — each signal checked against the others — to reach an answer, not a pile of data.
- Contamination investigation — identifying and tracing the source of a foreign species.
- Performance degradation — explaining why a batch behaves outside expectations.
- New supplier validation — proving equivalence before switching.
3 LDPE batches · 4 techniques converge, NMR reveals the difference
In semicrystalline polymer systems, thermomechanical processing variables influence chain conformational dynamics¹. Solid-state NMR resolves chemical environments at the nanometer scale², sensitive to changes not detectable by XRD or FTIR³.
Technical justification anchored in the literature
Every technique choice and every inference in the report is backed by peer-reviewed literature — with citations in the text. The conclusion isn't loose opinion: it's a traceable argument, defensible in an audit and in front of the client.
- Numbered citations linking claim to source
- Official standards and methods referenced per analyte
- Auditable reasoning end to end
Conclusion and expert opinion
The report closes with a clear position, signed by the Principal Investigator: what the data shows, what can't yet be claimed, and the next step. It includes an honest caveat on the limits of inference — what separates a technical opinion from a guess.
- Explicit technical position, not just results
- Inference limits declared honestly
- Next-step recommendation signed by the P.I.
Four techniques confirmed equivalence; only the solid-state NMR revealed the subtle conformational change not distinguishable by conventional QC — a molecular signature consistent with the atypical filtration behavior.
Without the industrial line's parameters, no direct causal correlation can be established — a complementary step is recommended for elucidation.
Aplicações de mercado
Onde a MET entrega resultados
Market Applications
Pharma
- Drug nanocarrier characterization
- API crystallinity analysis
- Liposome structure analysis
Materials
- Nanocomposite distribution
- Crystal defect analysis
- Interface characterization
Cosmetics
- Nanoemulsion structure
- Active encapsulation
- Penetration enhancers
FAQ
Frequently Asked Questions about Transmission Electron Microscopy (TEM)
How thin does my sample need to be for TEM analysis?
- Electrons must pass through the specimen, so TEM samples are typically thinned to under 100 nanometers — often far thinner for atomic-resolution imaging. Achieving this thickness usually requires specialized preparation such as ultramicrotomy, ion milling, or focused ion beam (FIB) sectioning, depending on the material.
What can TEM reveal that SEM cannot?
- Because the electron beam transmits through the sample rather than scattering off its surface, TEM reveals internal structure, crystal lattice arrangement, and defects at atomic-to-nanometer resolution — information SEM's surface-only imaging cannot provide.
Can TEM identify crystal structure and defects?
- Yes — selected area electron diffraction (SAED) and high-resolution imaging in TEM directly visualize lattice planes and crystallographic defects (dislocations, grain boundaries, stacking faults), making it a standard tool for crystallinity and phase identification at the nanoscale.
Is TEM destructive to the sample?
- The thin-sectioning preparation required for TEM is inherently destructive to the original sample — a small volume is removed and thinned specifically for analysis. If the original material must remain intact, this should be flagged before sample preparation begins.
What types of nanostructured materials benefit most from TEM?
- TEM is particularly valuable for nanoparticles, liposomes and other drug nanocarriers, nanocomposite fillers, and any system where internal architecture — core-shell structure, particle-within-particle morphology, crystallinity of an encapsulated active — determines performance and cannot be resolved by surface imaging alone.
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