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Cesium ion detection by terahertz light.

ABSTRACT: Recent developments in terahertz technologies provide new tools for analysis, inspection, and nondestructive sensing. If a heavy atom is encapsulated in a cage of a porous material, the atom should vibrate slowly and resonate with a low-frequency terahertz light. From this perspective, a cyanide-bridged metal framework is a suitable system because it contains many cages that can adsorb Cs ions. Herein we show the vibration mode of a Cs ion in a cage of a cyanide-bridged metal framework. First-principles phonon mode calculations and terahertz time-domain spectroscopy (THz-TDS) measurements indicate that the vibration mode of a Cs ion in a cyanide-bridged manganese-iron framework is at 1.5 THz, which is significantly apart from other lattice vibrations. Taking advantage of this feature, we develop a THz-light detection method for Cs ions, which is useful for non-contact sensing of Cs ions in dangerous environments or harmful circumstances.

SUBMITTER: Ohkoshi SI

PROVIDER: S-EPMC5570936 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Cesium ion detection by terahertz light.

Ohkoshi Shin-Ichi SI Yoshikiyo Marie M Namai Asuka A Nakagawa Kosuke K Chiba Kouji K Fujiwara Rei R Tokoro Hiroko H

Scientific reports 20170824 1

Recent developments in terahertz technologies provide new tools for analysis, inspection, and nondestructive sensing. If a heavy atom is encapsulated in a cage of a porous material, the atom should vibrate slowly and resonate with a low-frequency terahertz light. From this perspective, a cyanide-bridged metal framework is a suitable system because it contains many cages that can adsorb Cs ions. Herein we show the vibration mode of a Cs ion in a cage of a cyanide-bridged metal framework. First-pr ...[more]

PMID: 28839222

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