Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

High-throughput Scanning Near-Infrared Spectroscopic Reflectometer

Thermochromic Mapping

Example of thermochromic mapping of a V(1-x)NbxO2 combinatorial sample showing (left) variation of Nb content as a function of sample position, (middle) the variation in the thermochromic phase transformation as a function of Nb content, and (right) examples of reflectance versus temperature curves for different compositions of Nb.

This tool is for high-throughput measurement of the near-infrared spectroscopic reflectance of thin film combinatorial library samples at temperatures ranging from 274 K to 358 K. Samples as large as 7.62 cm in diameter can be measured with an areal spatial resolution of < 1 mm2. The instrument provides full reflectance spectra from wavelengths of 400 nm to 2500 nm as a function of temperature.

Related Publications


A translation stage with 100 mm of travel in the sample x and y direction.


Thermoelectric heater/chiller sample stage with a calibrated temperature range of 274 K to 358 K


White light source with nominal wavelength range from 360 nm to 2400 nm


Fiber-optic coupled NIR spectrometer with a detection range of 900–2500 nm and UV-VIS spectrometer with a detection range of 200 nm to 850 nm.


System is contained within a Plexiglass dry chamber flushed with nitrogen-enriched air to prevent condensation

Scientific Opportunities/Applications

Thermochromic materials, optical materials

Created August 22, 2017, Updated November 15, 2019