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Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical field in...

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Related Experiment Video

Updated: Jun 16, 2026

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging

Published on: November 24, 2021

Cinematic reflectometry using QIKR, the quite intense kinetics reflectometer.

J F Ankner¹, R Ashkar², J F Browning³

¹Second Target Station Project, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.

The Review of Scientific Instruments

|February 1, 2023

Summary

This summary is machine-generated.

The new Quite Intense Kinetics Reflectometer (QIKR) enables real-time neutron reflectivity measurements for dynamic materials science. This advanced technique allows for rapid, in-situ observation of processes like polymer diffusion and battery cycling.

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Last Updated: Jun 16, 2026

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging

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Published on: November 24, 2021

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

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Area of Science:

Materials Science
Condensed Matter Physics
Surface Science

Background:

Neutron reflectometry is crucial for analyzing interfaces in soft matter, biomaterials, and energy storage.
Existing reflectometers have limitations in data acquisition speed for dynamic processes.
The Spallation Neutron Source Second Target Station offers enhanced neutron brilliance.

Purpose of the Study:

Introduce the Quite Intense Kinetics Reflectometer (QIKR), a novel neutron reflectometer.
Enable high-speed, real-time observation of time-dependent interfacial phenomena.
Facilitate routine time-resolved measurements for various material systems.

Main Methods:

Utilizing neutron reflectometry with a horizontal sample surface geometry.
Employing the high brilliance of the Spallation Neutron Source Second Target Station.
Implementing "cinematic" data acquisition for rapid, continuous measurements.

Main Results:

QIKR will collect specular and off-specular reflectivity data significantly faster than current instruments.
Complete specular reflectivity curves can often be obtained in a single instrument setting.
Real-time observation of dynamic processes with frame rates up to 1 Hz is achievable.

Conclusions:

QIKR's cinematic operation will revolutionize time-dependent neutron reflectivity studies.
The instrument will enable routine in-situ observation of polymer diffusion, battery cycling, and membrane dynamics.
This advancement will accelerate research in soft matter, biomaterials, and energy storage.