This paper is focused on the template-free synthesis of nanosized ferric oxide (nano-Fe(2)O(3)) and its application in quartz crystal microbalance (QCM) resonators to detect dimethyl methylphosphonate (DMMP), a simulant of Sarin. The X-ray diffraction (XRD) patterns confirm that the synthesized samples are made of Fe(2)O(3) and the scanning electron microscopy (SEM) pictures show that the sampl...

A linear hydrogen-bond acidic (HBA) linear functionalized polymer (PLF), was deposited onto a bare surface acoustic wave (SAW) device to fabricate a chemical sensor. Real-time responses of the sensor to a series of compounds including sarin (GB), dimethyl methylphosphonate (DMMP), mustard gas (HD), chloroethyl ethyl sulphide (2-CEES), 1,5-dichloropentane (DCP) and some organic solvents were stu...

Recently, Mandal and Gong [23] refined and analyzed the recursive method by Lempel and Mykkeltveit et al. for generating de Bruijn sequences, where the recursive feedback function is the sum of a feedback function with k-th order composition and a sum of (k + 1) product-of-sum terms. In this paper we first determine the linear complexity of a composited de Bruijn sequence. We then conduct a pro...

Truly environmentally friendly means of detoxifying chemical warfare agents have yet to be developed. Toward this end, Soman (GD), VX and agent simulants were treated with aqueous aluminum sulfate (alum), sodium aluminate, or mixtures of the two. The mixtures were prepared by combining varying volumes of the aqueous salts to give buffered solutions (pH 2-12). Reactions were tracked using phosph...

This document presents the results of numerical analyses SAW gas sensor in steady state. The effect velocity changes depending on how surface electrical conductivity sensing layer is predicted. roughness above piezoelectric waveguide depends profile diffused molecule concentration inside layer. Numerical for DMMP (CAS Number 756-79-6) (RR)-P3HT state are shown. main aim investigations was to...

Photothermal interferometry has been demonstrated for detection of vapors with extremely high sensitivity (parts-per-trillion). Our present research uses a photothermal detection scheme that incorporates tunable sources and a modified Jamin interferometric design to provide high selectivity and sensitivity for organo-phosphate vapor detection. Phase shifts on microradian levels have been detect...

The adsorption of the chemical warfare agent simulant dimethyl methylphosphonate (DMMP) and the real agents Sarin and VX on the γ-Al2O3 surface has been studied using density functional theory. The focus is primarily on two different environmental effects, namely, surface hydroxylation and photoexcitation due to terrestrial solar radiation. Cluster models for the hydroxylated surface have been ...