This work demonstrates the production of a well-controlled, chemical gradient on the surface of graphene. By inducing a gradient of oxygen functional groups, drops of water and dimethyl-methylphosphonate (a nerve agent simulant) are "pulled" in the direction of increasing oxygen content, while fluorine gradients "push" the droplet motion in the direction of decreasing fluorine content. The dire...

Imidazo[1,2-a] pyridine-based two probes with different substituents containing oxime and hydroxyl functional groups were synthesised evaluated for detection of tabun nerve agent simulant diethylcyanophosphonate (DCNP). The nucleophile group present on both the can be rapidly phosphorylated by DCNP through a nucleophilic substitution reaction. fluorescent reacting underwent fluorescence OFF, wh...

We report the use of carbon nanotubes as a sensor for chemical nerve agents. Thin-film transistors constructed from random networks of single-walled carbon nanotubes were used to detect dimethyl methylphosphonate ~DMMP!, a simulant for the nerve agent sarin. These sensors are reversible and capable of detecting DMMP at sub-ppb concentration levels, and they are intrinsically selective against i...

We have assembled tin dioxide nanobelts with low-power microheaters for detecting dimethyl methylphosphonate sDMMPd, a nerve agent simulant. The electrical conductance of a heated nanobelt increased for 5% upon exposure to 78 parts per billion DMMP in air. The nanobelt conductance recovered fully quickly after the DMMP was shut off, suggesting that the single-crystal nanobelt was not subject to...

A number of recent terrorist attacks make it clear that rapid response, high sensitivity and stability are essential in the development chemical sensors for detection warfare agents. Nerve agent sarin [2-(fluoro-methyl-phosphoryl) oxypropane] is an organophosphate (OP) compound recognized as one most toxic Considering sarin’s toxicity, being odorless colorless, dimethyl methylphosphonate (DMMP)...

Chemical warfare agents(CWA) such as nerve agents and vesicating show lethality by skin contamination. Skin protection, therefore, is one of the top priorities to deal with growing threat from CWA. In an attempt develop most effective topical protectant(TSP), candidate substances including PFPE(perfluorinated polyether), PTFE(polytetrafluoroethylene), glycerin, polysaccharides were evaluated in...

A colorless, odorless G nerve agent, a type of chemical transfer agent (CWA) that causes significant loss life, is being studied for quick and accurate detection. In this study, detection materials with different functional groups were synthesized based on thiourea (TU)-decorated polyhedral oligomeric silsesquioxane (POSS) to study the most suitable material dimethyl methylphosphonate (DMMP), s...

I. Foreword Our studies are directed at determining the adsorption mechanisms and reaction pathways for the chemical warfare agent simulant (CWA) for GB (Sarin) on metal oxide surfaces and nanoparticles. By learning about how surface structure, nanoparticle size, composition, and surface co-adsorbates affect the overall interfacial chemistry, we are providing insight that can be applied toward ...