By using the super-resolution near-field structure （super-RENS） method, the super-resolution recording marks are obtained practically by an organic photochromic diarylethene mask layer, under much lower recording la...By using the super-resolution near-field structure （super-RENS） method, the super-resolution recording marks are obtained practically by an organic photochromic diarylethene mask layer, under much lower recording laser power of 0.45roW. The size of recording marks is decreased by 60% （from 1.6μm to 0.7μm） for a diarylethene （photo-mode） recording layer by the optical detection method （limited by optical diffraction）, or decreased by 97% （from 160Onto to 5Onto） for a heptaoxyl copper phthalocyanine （thermo-optical） recording layer, the latter is much smaller than the limitation of optical diffraction. In order to obtain a desirable result, a proper extent of photochemistry reaction in the mask layer is needed. Thus, the super-resolution recording marks can be obtained by adjusting the concentration of diarylethene in the mask layer, the recording laser power, and the moving speed of the sample disc.展开更多
A new approach to optically active β-alkyl-α-methylene-γ-butyrolactone derivatives was reported from the Rhodococcus sp. AJ270-catalyzed hydrolysis of appropriate nitriles. The inversion of enantioselectivity of th...A new approach to optically active β-alkyl-α-methylene-γ-butyrolactone derivatives was reported from the Rhodococcus sp. AJ270-catalyzed hydrolysis of appropriate nitriles. The inversion of enantioselectivity of the amidase has been observed when a methyl protection was introduced into the hydroxy group of the parent substrate.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 20333080, 20572059 and 20502013, and Beijing Key Lab 0pen Foundation at School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication （KF050302）.
文摘By using the super-resolution near-field structure （super-RENS） method, the super-resolution recording marks are obtained practically by an organic photochromic diarylethene mask layer, under much lower recording laser power of 0.45roW. The size of recording marks is decreased by 60% （from 1.6μm to 0.7μm） for a diarylethene （photo-mode） recording layer by the optical detection method （limited by optical diffraction）, or decreased by 97% （from 160Onto to 5Onto） for a heptaoxyl copper phthalocyanine （thermo-optical） recording layer, the latter is much smaller than the limitation of optical diffraction. In order to obtain a desirable result, a proper extent of photochemistry reaction in the mask layer is needed. Thus, the super-resolution recording marks can be obtained by adjusting the concentration of diarylethene in the mask layer, the recording laser power, and the moving speed of the sample disc.
文摘A new approach to optically active β-alkyl-α-methylene-γ-butyrolactone derivatives was reported from the Rhodococcus sp. AJ270-catalyzed hydrolysis of appropriate nitriles. The inversion of enantioselectivity of the amidase has been observed when a methyl protection was introduced into the hydroxy group of the parent substrate.
