TITLE:
Metal Nano Layer Coating for Improving the Detection and Recognition of Micro-Poisons Using Reflection Spectroscopic Measurement
AUTHORS:
Amir Abramovich, Alexander Shulzinger, Meir Ochana, David Rotshild
KEYWORDS:
FTIR Spectroscopy, Internal Reflection Element (IRE), Metal Nano Layer Coating, Detection of Micro-Poisons, Organophosphates
JOURNAL NAME:
Optics and Photonics Journal,
Vol.5 No.5,
May
25,
2015
ABSTRACT: Metal
nano layer coating for increasing the sensitivity of spectroscopic measurements
is proposed and experimentally demonstrated in this paper. The metal nano layer
will attract the micro-poisons from any measured aqueous sample increasing the
concentration of the micro-poison in the vicinity of the surface and
significantly improves the sensitivity of the spectroscopic measurement. The demonstration
was carried out using Fourier Transform Infra-Red (FTIR) operating in the MIR
400 cm-1 - 4000 cm-1 and 5 nm Gold layer which was grown
on silicon oxide substrate. In the experimental demonstration Malathion
organophosphate pesticide was used as micro-poison. The spectroscopic
measurement proves that Malathion was attracted to the metal nano layer. Furthermore,
the absorption lines of Malathion were detected and recognized. This proof of
principle can be applied to any Internal Reflection Elements (IRE) and it can
be used to purify any aqueous solutions and atmosphere from micro-poisons which
will be attracted to the metal Nano layer.