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Category: General
Feb 18, 2016

Infrared Spectroscopy below the Diffraction Limit


The nanoIR2-s is the latest addition to the Anasys Instruments portfolio of award winning products that provide nanoscale probe based analytical techniques while providing high quality atomic force microscope (AFM) imaging.


The nanoIR2-s is the latest addition to the Anasys Instruments portfolio of award winning products that provide nanoscale probe based analytical techniques while providing high quality atomic force microscope (AFM) imaging.

The nanoIR2-s is only nanoscale IR spectroscopy and imaging platform with both:

 AFM-IR - True model-free IR absorption spectroscopy and

s-SNOM - Sub-20 nm complex optical property imaging

 AFM-IR and s-SNOM are complementary techniques with different strengths. With the nanoIR2-s, you can choose a configuration that has one technique or both, depending on your sample and measurement needs.


AFM-IR directly detects light absorbed by the sample using the AFM probe tip to sense thermal expansion. This thermal expansion depends primarily on the sample’s absorption coefficient, ks, and is largely independent of other optical properties of the tip and sample. The AFM-IR technique is thus preferred for measurements where an accurate absorption spectrum is desired. AFM-IR is the best technique for soft matter samples with large thermal expansion. It provides true model-free IR absorption spectroscopy without band distortions and peak shifts.

s-SNOM detects light scattered by nanometer scale regions directly under the AFM probe tip. The scattered field depends on the complex optical constants of both the tip and sample and contains rich information about nano-optical phenomena. Reference samples (e.g. gold or silicon) are required to separate the sample response contributions from the source and tip. Modeling support may be needed to interpret the results. s-SNOM is a compelling technique for imaging nanoscale contrast in optical properties, with diverse applications in advanced materials, devices and fundamental light/matter interactions. s-SNOM is the best technique for hard matter samples that efficiently scatter light.

 Applications:

  • Polymers, blends, composites
  • Organics, life sciences
  • Graphene/boron nitride.2D materials
  • Nano-antennas/photonics
  • Inorganics, semi-conductors
  • IR Absorption spectroscopy
  • Correlation to FTIR
  • Unknown analysis
  • Wavelength dependent complex optical properties
  • Chemical compositional imaging
  • Rapid point spectroscopy
  • Surface sensitive/ultimate spatial resolution
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