Progress of porous silicon APTES-functionalization by FTIR investigations
2015; Elsevier BV; Volume: 331; Linguagem: Inglês
10.1016/j.apsusc.2015.01.107
ISSN1873-5584
AutoresN. Majoul, S. Aouida, B. Bessaı̈s,
Tópico(s)Analytical Chemistry and Sensors
ResumoThis work reports on the behavior of amino group-functionalized porous silicon (PS) intended to be used in bio-sensing and/or in medical applications. Amino-terminated organic layers were deposited onto silicon (Si) wafers and PS layers via 3-aminopropyltriethoxysilane (APTES) prepared in freshly hydrolysis solution. Fourier transform infrared (FTIR) spectroscopy was used to probe the absorption bands of NH2, CH2, SiO and SiHx groups forming in APTES-Si and APTES-PS complexes. The PS samples were dipped for different periods in hydrolyzed APTES solution. The increase in dipping time results in the disappearance of the SiSiH absorption bands, and the progressive apparition of the OSiH groups. After an adequate incubation time, all SiSiH and OSiH absorption bands disappear indicating a total functionalization of the PS layers.
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