Surface Coating / Alfa Chemistry

Vibrational Spectroscopy for Surface Chemical Analysis


The study of the vibrational spectra of adsorbed compounds is a powerful tool for deciphering the chemical and physical events that occur at the surface. The chemical bonds between the adsorbed substance and the surface, as well as the chemical bonds between the adsorbed atoms themselves, are directly measured using vibrational spectroscopy. It is also a non-destructive measurement technique. It measures the vibrational energy of the chemical using several techniques of spectroscopy. Organic chemists commonly employ vibrational spectroscopy as a structural spectroscopic approach. These technologies have the advantage of being able to study practically any material from any state.

Alfa Chemistry has extensive experience in characterizing polymers and chemical systems using Fourier Transform Infrared (FTIR), Raman, and Near-Infrared Spectroscopy, and can provide professional surface chemistry testing for you.

Vibrational Spectroscopy of Alfa Chemistry

Alfa Chemistry can assist you identify polymers and polymer additives, as well as unknown surface contaminants and flaws, and characterize thermoset polymer curing chemistry. Infrared investigation of unknown materials is supported by our internal spectrum library. For your vibration spectroscopy needs, our scientific team delivers extensive quality assurance knowledge.

Vibrational Spectroscopy for Surface Chemical Analysis

FTIR Spectrum Analysis

Infrared light is used to observe the characteristics of solids, liquids, and gases in FTIR investigation. It generates a sequence of distinguishing bands that aid in the identification and classification of the sample. For surface characterisation of coatings and pollutants, Alfa Chemistry employs a variety of sample methods, including:

Photoacoustic Spectroscopy (PAS): Surface and subsurface materials can be characterized using a non-contact approach paired with phase-modulated infrared spectroscopy.

Attenuated Total Reflectance (ATR): To acquire the spectrum of the surface and surface residues, use the direct contact approach.

Infrared Reflectance Absorption Spectroscopy (IRRAS): A method for detecting thin coatings or impurities on metal surfaces that does not require contact.

Alfa Chemistry uses a range of infrared microscopy techniques to examine surface particles and fibers, including:

  • The spectrum of a small area on the sample surface was obtained using a micro ATR objective lens.
  • The reflectance spectrum derived from the silver-filter-captured substance.
  • Gas phase thermal decomposition or oxidation products can be identified using a thermogravimetric analysis (TGA) equipment.

Vibrational Spectroscopy for Surface Chemical Analysis

Near Infrared Spectroscopy

Near-infrared spectroscopy (NIRS) is a method based on the combination of overtones and bond vibrations in molecules that utilises the near-infrared region of the electromagnetic spectrum. Alfa Chemistry's ability to use fiber optic probes for process analysis. This procedure can be used to clear liquids, solids, or slurries. The reaction kinetics of isothermal epoxy resin thermosetting curing can also be studied.

Raman Spectroscopy

Raman spectroscopy is a technique used to observe vibrations, rotations, and other low-frequency patterns in a system to help identify molecules. Alfa Chemistry uses confocal Raman microscopes for surface particle and fiber analysis:

Raman spectroscopy is a technique for identifying molecules by observing vibrations, rotations, and other low-frequency patterns in a solution. For surface particle and fiber analysis, Alfa Chemistry use confocal Raman microscopes:

  • A confocal Raman microscope with a mapping (XYZ) platform was used to determine the composition and thickness of each layer in the cross-section of the laminated packaging film.
  • To characterize surface corrosion and contaminants, use a confocal Raman microscope.
  • The FT-Raman spectroscopy technique is utilized to get the spectra of bulk materials and materials with fluorescence issues.

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