How can you identify gold nanoparticles from FTIR?
This page summarizes the recurring FTIR evidence reported for gold nanoparticles, 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 38 cited sources
Quick answer
gold nanoparticles 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
| Functionele groep | Bewijs |
|---|---|
| Amide | 43 |
| Alkyl C-H | 29 |
| Methacrylate | 19 |
| Acetate | 19 |
| Carbonyl (C=O) | 18 |
| Secondary amine | 16 |
| C n single bond | 16 |
| Hydroxyl (O-H) | 16 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of gold nanoparticles, 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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Citrate-capped gold nanoparticles as a sensing probe for determination of cetyltrimethylammonium surfactant using FTIR spectroscopy and colorimetry DOI: 10.1007/s00216-019-02067-8 -
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Large thermally induced nonlinear refraction of gold nanoparticles stabilized by cyclohexanone DOI: 10.1002/pssa.201026021 -
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gold nanoparticles
Biosynthesis and Biomedical Applications of Gold Nanoparticles Using Eclipta prostrata Leaf Extract DOI: 10.3390/app6080222 -
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gold nanoparticles
Effects of Hydrophobic Gold Nanoparticles on Structure and Fluidity of SOPC Lipid Membranes DOI: 10.3390/ijms241210226 -
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High-Sensitivity Permeation Analysis of Ultrasmall Nanoparticles Across the Skin by Positron Emission Tomography DOI: 10.1021/acs.bioconjchem.1c00017 -
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Etlingera elatior-Mediated Synthesis of Gold Nanoparticles and Their Application as Electrochemical Current Enhancer DOI: 10.3390/molecules24173141 -
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gold nanoparticles
Peptide-Directed Assembly of Single-Helical Gold Nanoparticle Superstructures Exhibiting Intense Chiroptical Activity DOI: 10.1021/jacs.6b07322. -
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gold nanoparticles
Rajam 等 - 2017 - Monodispersed Gold Nanoparticles as a Probe for th DOI: 10.17344/acsi.2016.3054 -
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Hetero-Functionalized Gold Nanoparticles to Silence AU-Rich Element Containing mRNAs in RAGE-Expressing Inflammatory Cells: Preparation, Characterization, and <i>In</i>-<i>Vitro</i> Evaluation DOI: 10.1166/jnn.2018.14648 -
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Oladipo 等 - 2020 - Characterization and biomedical application of phy DOI: 10.1088/1757-899X/805/1/012021
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