A new chelating fiber, poly(acrylo‐amidino diethylenediamine), was synthesized based on polyacrylonitrile fibers in diethylenetriamine with the aid of AlCl3. Complex formation with CrO42– was strongly pH‐dependent, as complexes formed only in the presence of NH3+ and NH2+. In the medium pH region, both ionic and hydrogen bonds were formed between poly(acrylo‐amidino diethylenediamine) and the chromate ion, as was confirmed by means of FT‐IR spectroscopy.

The effects of atomic hydrogen irradiation on the surface cleaning of InP substrates have been investigated by reflection high-energy electron diffraction (RHEED) and Auger electron spectroscopy (AES). Carbon and oxygen-free clean surfaces of InP have been produced for a temperature range of as low as about 350°C for 30 min irradiation of atomic hydrogen. Under this condition, the RHEED patterns have revealed phosphorus-stabilized (2×4) reconstructed surfaces while indium-stabilized (4×2) reconstruction patterns have been observed upon cleaning by using the conventional arsenic irradiation at 530°C.

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