How can you identify silicon from FTIR?
This page summarizes the recurring FTIR evidence reported for silicon, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 12 cited sources
Quick answer
silicon is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Functional group | Evidence |
|---|---|
| Silicon (Si) | 9 |
| Silicon-oxygen (Si-O) | 6 |
| Silicon silicon | 5 |
| Silicon hydride | 2 |
| Siloxane (Si-O-Si) | 2 |
| N h | 1 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of silicon, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
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confidence 0.9
silicon
Lu 等 - 2013 - Red Light Emission from Silicon Created by Self-io DOI: 10.4028/www.scientific.net/AMM.320.109 -
confidence 0.9
silicon
Vibrational frequencies of hydrogenated silicon carbonitride: A DFT study DOI: 10.1016/j.surfcoat.2017.06.017 -
confidence 0.9
silicon
Fara 等 - 2020 - Complex Investigation of High Efficiency and Relia DOI: 10.3390/en13184667 -
confidence 0.8
silicon
Investigation of stoichiometry of oxygen precipitates in Czochralski silicon wafers by means of EDX, EELS and FTIR spectroscopy DOI: 10.1016/j.spmi.2016.02.004 -
confidence 0.8
silicon
Structural, morphological and photoluminescent properties of annealed ZnO thin layers obtained by the rapid sol-gel spin-coating method DOI: 10.24425/opelre.2020.134460 -
confidence 0.5
silicon
Investigation of hydrogen storage behavior of silicon nanoparticles DOI: 10.1016/j.ijhydene.2011.04.054 -
confidence 0.3
silicon
Transmission electron microscopy study of extended defect evolution and amorphization in silicon carbide under silicon ion irradiation DOI: 10.1111/jace.17595 -
confidence 0.3
silicon
Tunable photonic structures based on silicon and liquid crystals [6801-32] DOI: 10.1117/12.767324 -
confidence 0.2
silicon
Zerga 等 - 2007 - Si-nano structures formation in amorphous silicon DOI: 10.1016/j.physe.2006.12.029 -
silicon
Megouda 等 - 2009 - Bi-assisted chemical etching of silicon in HFCo(N DOI: 10.1016/j.jlumin.2008.09.010
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