Nano-FTIR Absorption Spectroscopy of Molecular Fingerprints at 20 nm Spatial Resolution
CIC nanoGUNE · Max Planck Institute of Quantum Optics · +2 more institutions
Abstract
We demonstrate Fourier transform infrared nanospectroscopy (nano-FTIR) based on a scattering-type scanning near-field optical microscope (s-SNOM) equipped with a coherent-continuum infrared light source. We show that the method can straightforwardly determine the infrared absorption spectrum of organic samples with a spatial resolution of 20 nm, corresponding to a probed volume as small as 10 zeptoliter (10(-20) L). Corroborated by theory, the nano-FTIR absorption spectra correlate well with conventional FTIR absorption spectra, as experimentally demonstrated with poly(methyl methacrylate) (PMMA) samples. Nano-FTIR can thus make use of standard infrared databases of molecular vibrations to identify organic…
Citation impact
- FWCI
- 19.46
- Percentile
- 100%
- References
- 32
Authors
6Topics & keywords
- Fourier transform infrared spectroscopy
- Analytical Chemistry (journal)
- Infrared spectroscopy
- Materials science
- Infrared
- Spectroscopy
- Absorption (acoustics)
- Absorption spectroscopy