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Sensing applications in the petroleum industry pose unique challenges due to high viscosity and high refractive index of hydrocarbon fluids, which render many fluid-based techniques impractical. Real-time observation of adsorption, desorption, and competitive adsorption processes of long chain functionalized hydrocarbons onto activated cantilevers in static mode are shown. In addition, microcantilevers...
Abstract-the article intends to introduce the authors' experimental study on adsorption behaviour of chitosan solution on silica by reflectometry. Effect of pH on adsorption of Chitosan and interaction with non-ionic surfactant on silica has been studied. The adsorbed amount Γ was 0.80, 0.35 mg·m-2 at pH6.8 and 6.0, respectively. Zeta potential measurements have been measured in the experiment. Exchanges...
Adsorption experiments of vapor-phase elemental mercury (Hg0) were carried out by using two types of chemically modified CTS/SiO2 sorbents in a laboratory-scale fixed-bed reactor. The characterizations of the sorbents were analyzed using the methods of nitrogen (N2) adsorption/desorption, field-scanning electron microscope (FSEM), Fourier transform infra-red spectroscopy (FTIR) and X-ray diffraction...
This communication presents selective preconcentration of the anesthetic agent (Propofol) and the elimination of unwanted species from a representative sample of human breath. In this approach, a micro preconcentrator (muPC) consisting of embedded high-aspect-ratio pillars (30 mumtimes120 mumtimes240 mum), an outer dimensions of 7 mmtimes7 mm (encompass more than 3500 micro pillars), total inner surface...
The ability to covalently attach organic molecules to semiconductor surfaces in a controllable and selective manner is currently receiving much attention due to the potential for creating novel molecular-electronic devices such as resonant tunneling diodes. Scanning tunnelling microscopy (STM) is ideally suited for such studies as it can provide information on the geometric and electronic structure...
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