pH-controlled silicon nanowires fluorescence switch |
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Authors: | Lixuan Mu Taiping Zhang Hongyan Zhang |
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Institution: | a Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China b Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract: | Covalently immobilizing photoinduced electronic transfer (PET) fluorophore 3-N, N-bis(9-anthrylmethyl)amino]-propyltriethoxysilane (DiAN) on the surface of silicon nanowires (SiNWs) resulted a SiNWs-based fluorescence switch. This fluorescence switch is operated by adjustment of the acidity of the environment and exhibits sensitive response to pH at the range from 8 to 10. Such response is attributed to the effect of pH on the PET process. The successful combination of logic switch and SiNWs provides a rational approach to assemble different logic molecules on SiNWs for realization of miniaturization and modularization of switches and logic devices. |
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Keywords: | Silicon nanowires Optical switch Surface modification |
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