Functionalization of elecroceramics by grading and surface modification

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Nickel(II) dithiocarbamate complexes derived from amino acids (HAlaOMe,HValOMe,HGlyOEt,HPheOMe, and HLeuOMe) or ethanolamine were prepared. Furthermore, formation of a crystalline membrane on the substrates was examined using these complexes. Substrates employed in this study were silicon wafer (with and without surface oxide layer), copper, titanium, nickel, copper oxide, glass, alumina. The procedure to growth a crystalline membrane is as following ; to a saturated solution of the complex, the substrates were immerced for a day, and crystal deposition was observed to be concrete. As a result, all the complexes did not crystallize onto the mirror surface of silicon wafer. In addition, the complex composed from amino alcohol separated a crystal on no basal plate. The complexes derived from aminoalcohol cannot give crystals on the any surfaces of the sustrates. On the other hand, crystalline membranes on the surface of the substrates other than silicon can be grown from some complexes given from amino acids. For example, complexes from Val and Ala formed uniform crystalline membranes on metal surfaces, but they should give only crystalline islands on the surface of any oxides. On the contrary the Gly derivative formed uniform membrane crystal on copper oxide substrates, but it can not form crystals on the metal substrates. Thus, the Gly derivative should offer a surface recognition ability.After the etching of the silicon wafer, on which no crystalline membrane can be grown from all the complexes used in this study, crystal deposition was able to be recognized in the kink or terrace division. These suggest that a difference of surface energy affects nuclear formation of a crystals. These complex comparatively disintegrates at low temperature, and the use to patterning to the ceramics surface which used specific crystal deposition from finding what can form ceramics crystal to ceramics surface can be expected.