SOBRE A LINHA DE LUZ
The IR1 beamline is an experimental station dedicated to Synchrotron Fourier Transform Infrared (FTIR) Nanospectroscopy in the mid-infrared range. Its main purpose is the chemical-physical analysis of condensed matter in the nanoscale. Similar to a typical FTIR endstation but with spatial resolution better than 40 nm, IR1 has multidisciplinary demands including investigations in chemistry, physics, biology, archaeology, pharmacology and materials science. The available techniques are scattering Scanning Near-field Optical Microscopy (s-SNOM) and tapping-mode Atomic Force Microscopy (AFM).
For beating the intrinsic diffraction limit of light, the synchrotron broadband IR beam is focused on a metallic AFM tip, which acts as an antenna. The radiation is then condensed at the apex of the tip, which has typical radius of 25 nm. Hence, the source size is no longer dependent on the wavelength of the radiation but on the dimensions of the tip – in this case few tens of nanometers.
In this scenario, the AFM combined with the IR beam becomes a spectral nanoprobe with spatial resolution better than 40 nm, which can be suitable for multidisciplinary scientific cases in chemistry, physics, biology, archaeology, pharmacology and materials science. Applications include: opto-electronic and vibrational properties of 2D materials, nanoscale chemical analysis of polymers blends, drug delivery efficiency in the sub-micron scale, opto-vibrational properties of solid-state nano-devices and nano-correlation between morphology and chemical composition of infrared active condensed matter.