PhD Mid-term Seminar Series: Infrared scattering type scanning near field optical microscopy (s-SNOM) in liquid
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PhD Mid-term Seminar Series: Infrared scattering type scanning near field optical microscopy (s-SNOM) in liquid
CIC nanoGUNE Seminars
- Speaker
-
Divya Virmani, Nanooptics Group
- When
-
2020/02/24
12:00
- Place
- nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
- Add to calendar
-
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**Infrared scattering type scanning near field optical microscopy (s-SNOM) in
liquid**
“Mid-infrared (IR) spectroscopy is a widely used label-free tool for
secondary structure analysis and material identification in chemistry, biology
and biochemistry. However, the diffraction limit of light prevents nanoscale
resolved studies of proteins. Infrared scattering-type near-field optical
microscopy (s-SNOM) is a scanning probe microscopy (SPM) technique which
extends the power of mid-IR spectroscopy deep into the subwavelength regime,
making it a highly sensitive tool for probing and mapping of protein secondary
structure with nanoscale resolution in air. It is highly desirable to study
biological samples in their native aqueous environments. However, the
sensitivity of these techniques deteriorates dramatically in liquid
environments. In this talk we will demonstrate a technique to enable nanoscale
resolved chemical imaging and spectroscopy in liquid media.