What is Fourier Transform Spectroscopy?
Fourier Transform Spectroscopy (FTS) is a measurement technique whereby spectra are collected based on measurements of the coherence of a radiative source, using time-domain or frequency-domain measurements of the electromagnetic radiation. FTS is widely used in various fields, including
nanotechnology, for its high resolution and sensitivity.
How Does Fourier Transform Spectroscopy Work?
FTS works by collecting an interferogram, which is a time-domain signal that contains all the spectral information of the light source. This interferogram is then processed using a mathematical
Fourier Transform to convert it into a frequency-domain spectrum. The key components of an FTS system typically include a
Michelson interferometer, a light source, a detector, and a data processing unit.
What are the Advantages of Using FTS in Nanotechnology?
1.
High Resolution and Sensitivity: FTS provides high-resolution spectra, which is beneficial for resolving closely spaced spectral features in
nanostructures.
2.
Broad Spectral Range: The technique can cover a wide range of wavelengths, from the visible to the infrared, making it versatile for different types of nanomaterials.
3.
Fast Data Acquisition: FTS can collect data rapidly, which is advantageous for studying dynamic processes in nanomaterials.
4.
Quantitative Analysis: The technique can be used to quantitatively analyze the concentration of different components in a nanomaterial.
What are Some Applications of FTS in Nanotechnology?
1.
Characterization of Carbon Nanotubes: FTS is used to study the vibrational modes of
carbon nanotubes and determine their electronic properties.
2.
Surface Plasmon Resonance: The technique is employed to investigate the
surface plasmon resonance in metallic nanoparticles, which has implications for sensing and imaging applications.
3.
Drug Delivery Systems: FTS helps in analyzing the interaction between
nanoparticles and drugs, aiding the development of targeted drug delivery systems.
4.
Solar Cells: The technique is used to study the optical properties of nanomaterials used in
solar cells, optimizing their efficiency.
Challenges and Limitations
While FTS is a powerful tool, it does have some limitations. The technique requires complex and expensive equipment, which may not be readily available in all laboratories. Additionally, the interpretation of the spectra can be challenging and requires a high level of expertise. 
