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Micro-Raman Confocal Spectrometer – AFM

The WITec Alpha 300 RA Raman spectrometer is a molecular vibrational state analyzer microscope that operates based on the quantum phenomenon “Raman shift.” Its confocal optics, coupled with AFM, enable the execution of micro-Raman mappings for chemical identification as well as the acquisition of high-resolution 3D Raman images.

The Confocal Raman / AFM spectrometer (WITec Alpha 300-RA) allows for local, chemical, and topographical analysis in a correlative manner, enabling the construction of a three-dimensional chemical image of a sample’s surface or simply the local identification of molecules. The spectrometer provides a lateral resolution of up to 200 nm and minimal penetration on the scale on the micrometer range. The system operates with a selectable wavelength of 532 nm and 785 nm, with adjustable intensity, achieving a spectral resolution of up to 0.2 cm-1.

The coupled atomic force microscope enables nanoscale topographic characterization. Its combination with an optical microscope allows preliminary inspection to select the area of interest for AFM measurements. The WITec AFM objective provides a direct view of the sample and cantilever, enabling accurate and direct positioning of the probe tip. No sample preparation is required and is minimally invasive.

This equipment was acquired with the support of funding from FONDEQUIP EQM150020.


Applications

  • Biology: Cells, Bacteria, Organs.
  • Pharmaceutical and cosmetic: Tablets, topicals, solutions.
  • Materials Science: Semiconductors, nanostructures, organometallic, polymers.
  • Geology: Rocks, fossils of animals, plants or bacteria.
  • Archeology and art: cave paintings, ancient art, paper fibers, inks.
  • Food: Innovation and certification of chemical composition.
  • Forensics: Hazardous or unidentified materials.

Services

  • Confoncal micro-Raman spectrum.
  • 2D confocal Raman image.
  • TrueSurface™ 2D confocal Raman imaging (guarantees focus in large areas).
  • Deep scan Raman spectrum.
  • 3D confocal Raman imaging.
  • Color optical micrography.
  • AFM topographic image.
  • Correlative Raman-AFM image.

Rates

Check rates here

For requesting a service, submit a Work Order using the following form: WO Raman.

For more information or quotes, please contact Álvaro Adrián at fesemcien@uc.cl or by phone at (56-9) 5504 1441 during business hours from Monday to Friday, 9:00 a.m. to 1:00 p.m. and 2:00 p.m. to 6:00 p.m.

Publications

  • Hevia, S. et al. Nanostructured substrate effects on diamond-like Carbon films properties grown bypulsed laser deposition. Surface and Coatings Technology, 2017, Volume 312, 55.
  • Venegas, R. et al. Biomimetic reduction of O2 in an acid medium on iron phthalocyanines axiallycoordinated to pyridine anchored on carbon nanotubes. Journal of MaterialsChemistry. A, 2017, Volume 5, 12054.
  • Guzmán, D. et al. CdTe quantum dots modified electrodes ITO-(Polycation/QDs) for carbon dioxidereduction to methanol, Applied Surface Science, 2020, Volume 509, 145386.
  • Calfuman, K. et al. Quick and Easy Modification of Glassy Carbon Electrodes with Ionic Liquid andTetraruthenated Porphyrins for the Electrochemical Determination of Atrazine in Water, Electroanalysis,2019, Volume 31, 4.

Application Form