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Nitrogen implantation into amorphous carbon has been studied at various implantation temperatures by using 100 keV N ϩ at 5 A and fluences of 2ϫ10 17 ions/cm 2 . The apparent surface hardness and elastic modulus from nanoindentation are well correlated with an asymmetric diffuse peak at around 1500 cm Ϫ1 and a broad band at ϳ700 cm Ϫ1 in the Raman spectra. Both the enhanced strengths and Raman characteristics show very weak Arrhenius-type implantation-temperature dependence with activation enthalpies of approximately 20 meV in the temperature range 223Ϫ1073 K.

This study is aimed at making index with series of experiments in order to adjust the change occurring by an area effect in architectural color design. The basic experiment was performed to find the change of color regularly in the condition of fixing regular area and viewpoint.

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