chemical vapor Articles

  • Laterally ordered 2-D arrays of Si and Ge nanocrystals within SiO2 thin layers for application in non-volatile memories

    Silicon and germanuim nanocrystal memories show important advantages over conventional floating gate non-volatile memories. To fully exploit these advantages, it is essential to achieve accurate control of nanocrystal size and arial density, as well as accurate positioning of the nanocrystal layer within the gate dielectric. In this paper, a review of work performed at IMEL on the fabrication and ...


    By Inderscience Publishers

  • Adsorption kinetics and thermodynamics of hydrophobic natural organic matter (NOM) removal from aqueous solution by multi-wall carbon nanotubes

    The objective of this research was to study the efficiency of Multi-Walled Carbon Nanotubes (MWCNTs) for the adsorption of hydrophobic natural organic matter (NOM) from aqueous solution under different operational conditions of contact time, pH, initial concentration of NOM and temperature. MWCNTs were synthesized via chemical vapor deposition (CVD) with average diameter of 10–50 nm. The ...


    By IWA Publishing

  • Modification of tubular ceramic membranes with carbon nanotubes using catalytic chemical vapor deposition

    In this study, carbon nanotubes (CNTs) were successfully grown on tubular ceramic membranes using the catalytic chemical vapor deposition (CCVD) method. CNTs were synthesized at 650°C for 3–6 h under a 120 mL min−1 flow of C2H6 on ceramic membranes impregnated with iron salt. The synthesis procedure was beforehand optimized in terms of catalyst amount, impregnation duration ...


    By IWA Publishing

  • Nanolasers: lasing from nanoscale quantum wires

    Semiconductor lasers are in many ways second only to transistors as to their impact on today's high-tech industries. The unique characteristics, such as narrow emission wavelength, high frequency modulation, and device integratibility, make semiconductor lasers ideal photon sources for applications as diverse as telecommunication, signal processing, material characterisation, and medical ...


    By Inderscience Publishers

  • Hiden ESPion plasma probe measurements on a hollow-cathode based large-volume plasma source

    Vacuum-based surface engineering and coating processes require plasma sources generating a high charge carrier density in order to achieve enhanced sputter and activation effects. Fraunhofer FEP is providing a hollow-cathode based plasma source, which produces homogeneous large-volume plasmas of up to 1 m3 with maximum plasma densities of more than 1012 cm-3 at chamber pressures between 0.1 and ...


    By Hiden Analytical Ltd.

  • The evolution of thermal mass flow meters

    Who were some of the pioneers in thermal mass flow technology? A. Thermo-Systems, Inc. (TSI) began in its founder’s basement in 1959, with a cooled-film anemometer designed for transient measurements in high temperature fluid flows. This led to TSI’s hot-film and hot-wire anemometers, the first commercial products of this type. These immersion-type devices were used mainly as ...


    By Sierra Instruments, Inc.

  • Book Review: Detection Technologies for Chemical Warfare Agents and Toxic Vapors

    Detection Technologies for Chemical Warfare Agents and Toxic Vapors, by Yin Sun and Kwok Y. Ong. CRC Press, 2005. 272pp. ISBN1-56670-668-8Keywords: book ...


    By Inderscience Publishers

  • Assessment of carbon nanotubes and silver nanoparticles loaded clays as adsorbents for removal of bacterial contaminants from water sources

    This work evaluated the antimicrobial efficacy of kaolin clay and its loaded forms with carbon nanotubes (CNTs) and silver nanoparticles (AgNPs) against bacterial isolates from different water supplies (tap, underground and surface water) in addition to wastewater. A total of 160 water samples were collected from different water sources in the investigated districts. Samples were cultured for ...


    By IWA Publishing

  • Vaccu.Lan for Green

    You're building a 'green' science building, and some of your laboratories require vacuum support. How do you provide vacuum for those labs? You can't use an oil-sealed rotary vane vacuum pumps in the labs. The oil mist would contaminate the laboratory air, and the noise pollution makes the working environment unpleasant. The pump oil would quickly be contaminated by biological and chemical ...

  • Pyrometers improve quality and yield in silicon growth

    Temperature control has always been one of the most critical parameters in optimizing many complicated solar photovoltaic manufacturing processes because it plays an important role in producing higher-quality product and increasing overall yield. Unfortunately, it's also been one of the most difficult things to measure in these processes. Certain applications of radiation pyrometers in ...

  • CVD Diamond

    We have cvd diamonds for sale! CVD (Chemical Vapor Deposition) diamond. The mixture of carbon-containing gas and oxygen is excited and decomposed at a high temperature and a pressure lower than the standard atmospheric pressure to form an active diamond carbon atom, and the deposit is alternately grown on the substrate to form a ...

  • Environmental and human health risks of aerosolized silver nanoparticles

    Silver nanoparticles (AgNPs) are gaining attention from the academic and regulatory communities, not only because of their antimicrobial effects and subsequent product applications, but also because of their potential health and environmental risks. Whereas AgNPs in the aqueous phase are under intensive study, those in the atmosphere have been largely overlooked, although it is well established ...

  • How Close to Contamination does a Property need to be for Vapor Intrusion to be a Concern?

    Cinnaminson, NJ, February 19, 2013 There are numerous sites across North America that have contaminated soil or groundwater due to manmade pollution.  Some of these sites have been a problem for decades and as communities have grown, more and more residential and commercial properties have been built above or near these areas. A major issue for properties built near these contaminated ...


    By EMSL Analytical, Inc.

  • Most Common Indoor Air Pollutants

    Is the indoor air you breathe healthy? According to the World Health Organization, 40% of all buildings pose a serious health hazard due to indoor air pollution. The EPA calls indoor air pollution the #1 pollution problem in America. What Are The Most Common Indoor Air Pollutants? While there are a number of factors that can create air quality problems in a building, here are ...

  • Modeling of packed absorption tower for volatile organic compounds emission control

    Development of chemical industry and high vapor pressure of volatile organic compounds (VOCs) have been caused that these materials recently be considered as a source of air pollution. These are different methods for separation of VOC from air that absorption by suitable and selective solvent is an efficient method. In this research, mathematical modeling of a packed absorption tower for ...

  • Ducted or Ductless Fume Hoods? Is this the real issue?

    Most laboratories will need some form of fume cabinet at some point. The type of cabinet is usually the starting point of the process, and the choice of either ductless or ducted cabinet is made. With the ever increasing need to save money and to be environmentally responsible there are other considerations that need to be explored before a decision can be reached. ...


    By Camlab Limited

  • Protect Your Respiratory System

    The air around you keeps you alive. But in certain circumstances, it can cause you serious injury, illness or death. To stay alive and healthy, you need air which is clean, free of toxic gases and other contaminants, and contains the right amount of oxygen. Most of the time, the air around you at home, on the street and at work fills the bill. But under certain circumstances, the air contains ...


    By SafetySmart

  • Electronics Manufacturing Industry - Pollution Prevention Guidelines

    Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum emissions levels that are ...


    By The World Bank

  • Development of a novel odor measurement system using gas chromatography

    This paper describes a novel odor measurement system for creating arrays of virtual chemical sensors with nonoverlapping responses using ultrahigh-speed gas chromatography with a surface acoustic wave sensor (GC/SAW). This GC/SAW system provides high-resolution twodimensional olfactory images for easy recognition of many complex odors. Separation and quantification of the individual chemicals ...

  • Epoxy Moisture Matters

    Welcome to Moisture Matters – the show where we take your everyday and not so everyday objects and test them to see which has more moisture. Today we’re testing epoxy! Which do you think has more moisture, old or new epoxy? The Computrac Vapor Pro XL is a chemical-free Karl Fischer alternative that ...


    By AMETEK Brookfield

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