Short Description
FT-Raman microscope (Bruker Optics) with 1064 nm laser excitation (Nd:YAG) and with visual sample inspection is a device needed for (art)sample analysis in case when analysed samples show high fluorescence contribution in dispersive Raman spectra. FT (Fourier Transform) Raman usually strongly improves the Raman signals of such samples resulting in fluorescence-free spectra of such microscopic samples. It can be used for molecular analysis of binders, pigments, dyes, cellulose-based materials (ethers, esters, paper, etc.). Our system includes a research-grade microscope with highly efficient optical fiber coupling between the FT-Raman spectrometer and microscope. In order to achieve the best Raman signals, the instrument is equipped with computer-controlled sample stage and servo-assisted z-control including autofocus-function. The device covers the wavenumber range between 70-3500 cm-1.
Contact Person
DI Dr. Dubravka Jembrih-Simbürger
Research Services
The Institute for Natural Sciences and Technology in the Arts (INTK) and the Core Facility "Centre for Material Sciences in Art and Conservation (ZMKK)" are central facilities of the Academy of Fine Arts Vienna for the natural scientific (material) analysis of works of art. The facilities support members of the Academy of Fine Arts Vienna or other research institutions, museums, libraries, archives, etc. in the realisation of joint projects within the framework of research funding or contract research and also offers services (third-party funding) for external parties.
The focus is on scientific material analyses of artworks and archive materials using FTIR, (FT & dispersive) Raman, XRF, UV-Vis, HSI, RSI, ESEM (EDX), Py-GC/MS, digital X-ray radiography and photo documentation (Vis, UV, IR, IRR), microscopy, chambers for accelerated ageing of samples.
Special services on FT Raman microscope:
(Nd:YAG diode laser, P=1000mW, Ge-detector, N2 cooled, Olympus BX53 reflected light microscope, objectives 10x & 40x)
• FT-Raman analysis and chemical mapping utilizing point, line and area mapping with high "signal throughput", high resolution and high stability
• Main focuses are on the identification and characterization of art materials and the study of ageing phenomena of these materials.
• FT-Raman microscopy on traditional and modern materials from art objects:
e.g. cellulose-based materials - paper, cellulose esters, cellulose based plastics (cellulose acetate and nitrate, etc.);
parchment,
pigments and dyes,
(micro)biological samples,
natural binding media as well as
other materials used in artworks which are partly weak Raman scatterer and/or substances giving high fluorescence backgrounds in dispersive Raman spectroscopy which makes their identification in dispersive way impossible.
• Analysis of samples with different surface properties (curved, rough, and uneven surfaces)
Methods & Expertise for Research Infrastructure
Molecule-specific FT-Raman analysis and chemical FT-Raman imaging (2D/3D) of microscopic samples taken from artworks (e.g. paintings, books, maps, drawings, graphics, etc.) to identify components (modern inks, pigments, dyes, etc.). Also, systematic measurements on mock-ups regarding ageing and dagradation of materials.