In this paper, we demonstrate the application of ZnO doped with gallium (GZO), aluminum (AZO) and germanium (GeZO) nanocrystals as novel plasmonic and chemiresistive sensors for the detection of hazardous gases including hydrogen (H2) and nitrogen dioxide (NO2). GZO, AZO and GeZO nanocrystals are obtained by non-aqueous colloidal heat-up synthesis with high transparency in the visible range and...

Containers are increasingly used for the worldwide transport of all kinds of goods. Consistent with national and international regulations on pest controls, a growing proportion of these containers undergoes fumigation. Frequently, the prescribed labelling is missing. According to literature, this situation may lead to accidents and represents a significant health risk to dock workers, inspecto...

This product can be set to selectively detect any reducing or oxidizing molecule and/or vapor in the presence of other molecules. The technology is designed to use any sensor head (solid state and/or electrochemical) which features high reliability, high sensitivity, fast response and low cost. The system can be tailored to suit specific purposes in the field of toxic and combustible gases (alc...

Atmosphere a system that plays a vital role in many natural processes, such as the formation of the global climate, the composition of the chemical components of the oceans and seas. The penetration of the earth’s surface solar radiation and heat the delay in the earthly space, depends on the gas composition of the atmosphere [1]. The problem of air pollution one of the greatest global challeng...

Historically acknowledged as toxic gases, hydrogen sulfide (H2S) and nitric oxide (NO) are now recognized as the predominant members of a new family of signaling molecules, "gasotransmitters" in mammals. While H2S is biosynthesized by three constitutively expressed enzymes (CBS, CSE, and 3-MST) from L-cysteine and homocysteine, NO is generated endogenously from L-arginine by the action of vario...

Gases such as NO and CO play important roles both in normal physiology and in disease. In recent years, interest has been directed towards other naturally occurring gases, notably H 2 S, which is produced in body by three enzymes namely CBS (cystathionine beta synthase), CSE (cystathionine gamma lyase) and MST (3-Mercaptopyruvate sulfurtransferase), present in mitochondria and/or cytosols where...

The toxic smoke production of four rainscreen façade systems were compared during large-scale fire performance testing on a reduced height BS 8414 test wall. Systems comprising ‘non-combustible’ aluminium composite material (ACM) with polyisocyanurate (PIR), phenolic foam (PF) and stone wool (SW) insulation, polyethylene-filled ACM PIR insulation tested. Smoke toxicity was measured by sampling ...

The desire to detect and identify trace amounts of airborne analytes, including combustible or toxic gases, small molecules, particles, viruses or bacteria with ever increasing sensitivity and selectivity continues to be one of the main drivers in sensor research. [ 1–3 ] While the variety of sensing principles continues to grow, most principles share a common feature which is the requirement t...

People not only inhale airborne contaminants but also absorb them through the skin. Both routes can set off localized toxic reactions or damage internal organs such as the liver, kidney, and brain. Conventional tests of the toxicity of gases and vapors, in which laboratory animals are exposed to lethal or sub-lethal doses of chemicals, have been criticized as expensive, unethical, inhumane, and...

Single crystal copper oxide nanoplatelets with a high percentage of {001} facets were synthesized by a facile hydrothermal approach. The as-prepared materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, and high resolution transmission microscopy. Via density functional theory calculations, it was found that the ...