Spectrophotometry.
Spectrophotometry is a physicochemical method of investigating solutions and solid substances, which is based on studying the absorption spectra in the ultra-violet (200—400 nm), visible (400—760 nm) and infrared (>760 nm) spectral regions. The basic dependence studied in spectrophotometry is the dependence of the incident light absorption intensity on the wavelength. The figures below show two main patterns of spectrophotometers measuring spectral aperture reflection coefficient of a given object with respect to a working standard with a known spectral characteristic:
1 – Light source, 2 – Monochromator, 3 – Measuring device, 4 – Standard, 5 – Sample
The measured sample is lit with white light. The monochromator is located in the outgoing current.
1 – Light source, 2 – Monochromator, 3 – Measuring device, 4 – Standard, 5 – Sample
The measured sample is lit with monochromatic light.
There are other methods of analysis of nanomaterials:
- Mass spectrometry
- Ir-spectrometry
- X-ray structural analysis
- Highly effective solution chromatography
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