Related Experiment Video
Updated: Mar 18, 2026

13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
16.0K
Characterization of prospective explosive materials using terahertz time-domain spectroscopy
Applied Optics
|July 14, 2016
Summary
Terahertz spectroscopy revealed distinct spectral features for energetic azotetrazolate salts and caged nitramines. Attenuated total reflection (ATR) offers a viable, simpler method for identifying these explosive materials.
Area of Science:
- Materials Science
- Spectroscopy
- Chemistry
Background:
- Terahertz (THz) spectroscopy is a valuable tool for analyzing materials.
- Energetic materials require precise characterization for safety and identification.
Purpose of the Study:
- To investigate the terahertz spectral properties of six prospective explosive materials.
- To evaluate the effectiveness of different spectroscopic techniques for their characterization.
Main Methods:
- Time-domain terahertz spectroscopy was used to analyze azotetrazolate salts and caged nitramines.
- Measurements were performed in transmission and attenuated total reflection (ATR) configurations.
- Variable-temperature studies (-175°C to 0°C) were conducted to enhance spectral resolution.
Main Results:
- Distinct spectral features were observed in the 0.8-3.2 THz range for the investigated explosives.
- Low-amplitude absorption peaks were highlighted at sub-ambient temperatures.
- ATR measurements showed good agreement with transmission data, validating ATR for these materials.
Conclusions:
- Terahertz spectroscopy effectively differentiates between energetic azotetrazolate salts and caged nitramines.
- Attenuated total reflection (ATR) is a practical and reliable method for the identification of these insensitive explosive materials.
- Variable-temperature measurements improve the detection of subtle spectral features.
More Related Videos
Related Concept Videos
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
1.5K
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...
1.5K
Spectrophotometry: Introduction
11.0K
Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
11.0K
Atomic Emission Spectroscopy: Lab
773
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
773
Raman Spectroscopy: Overview
2.2K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
2.2K
Atomic Emission Spectroscopy: Overview
4.1K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
4.1K
IR Frequency Region: Fingerprint Region
2.2K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
2.2K

