Modification Of Porous Silicon Surfaces And Detection Of Molar Absorption Coefficient

In this paper we report the chemical modification of porous silicon surface, detection of molar absorption coefficient and lay the foundation for the further applications and researches. The main research works are summarized as follows:1. Chemical modification of Porous SiliconFirstly, we use electrochemical reaction to get porous silicon from planar silicon. Secondly, the microwave-assisted functionalization of hydrogen-terminated porous silicon with the product of11-bromo-1-undecene and tetraethylene glycol leads to the formation of the surface covalently attached by Si-C bonds. Then, the end of the hydroxyl react with succinic anhydride and DMAP to generate carboxyl. Finally, chemical activation of acid species was subsequently achieved by using NHS in the presence of DCC. In this article we use the infrared, mass spectrometry and other detection methods to characterize the whole process of the surface modification.2. Detection of molar absorption coefficientWe synthetize the anhydride and NHS ester of2,2-dimethyl-glutaric acid. Use liquid infrared detection of the product of different concentrations, and we can calculate molar absorption coefficients of different Characteristic peaks for further research of the dynamics of hydrolysis process.