Poly 1,8-diaminonaphthalene/multiwalled carbon nanotubes-COOH hybrid material as an effective sorbents in solid phase extraction has been developed for the separation and preconcentration of Cd(II) and Pb(II) at trace levels in environmental water samples. The results indicate that the novel nanocomposite show a high affinity for these heavy metals due to the presence of several good extractive sites, which are introduced to the synthesized nanocomposite The maximum adsorption capacity of the synthesized sorbent for cadmium and lead ions was found to be 101.2 and 175.2 mg g(-1) , respectively. The detection limits of this method were 0.09 and 0.7 ng ml(-1) for Cd(II) and Pb(II), respectively.

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TiO2 and nickel-silicide layers are consequently deposited and micro machined to compose a mesa-structured tunneling transistor. The depositions are done with the RF-sputtering method and the electrical and physical characteristics of the products are investigated. Transistors show an amplification coefficient of about 20. To improve the quality and coverage of the TiO2 layer, the oxide deposition is made by means of an APCVD reactor. The grown oxide shows a dielectric coefficient between 19 and 21 and its breakdown field is about 107 V/cm.

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