caa a22 4500 606194703 CHVBK 20210128100915.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10934-014-9890-8 doi (NATIONALLICENCE)springer-10.1007/s10934-014-9890-8 Comparative SERS study carried out on unsilanized and silanized oxidized porous silicon surface coated by small gold nanoparticles [Elektronische Daten] [H. Dridi, A. Moadhen, L. Haji] Porous silicon (PSi) was formed by electrochemical anodization and was oxidized before silanization and immersion in colloidal gold nanoparticles (GNP) (5nm size) solution. The oxidized PSi (OPSi) coated with nanoparticles was used as surface enhanced Raman scattering (SERS) substrate, where bovine serum albumin (BSA) was used as a target molecule. Also, rhodamine 6G (R6G) dyes were used to confirm the SERS efficiency. Firstly, the bio-conjugation between protein and GNP was investigated by localized surface plasmon resonance spectroscopy. Then a comparative SERS study from silanized and unsilanized OPSi was performed and showed a good vibrational BSA bands resolution with the unsilanized one. The silanized surface did not show any improvement on the SERS enhancement of the BSA due to the interferences between the vibrational modes of 3-aminopropyltriethoxysilane and BSA. Furthermore, we have investigated the BSA solution pH effect on the SERS results in the case of unsilanized OPSi surface. The results prove the efficiency of the SERS substrate at pH 4.9, corresponding to BSA iso-electric point. A detection limit of about 10−8 M was obtained for both BSA and R6G molecules. Springer Science+Business Media New York, 2014 Oxidized porous silicon nationallicence Small size gold nanoparticles nationallicence SERS nationallicence Bovine serum albumin nationallicence Rhodamine 6G nationallicence Dridi H. CNRS-UMR 6082, Université Européenne de Bretagne, ENSSAT 6 Rue Kerampont, BP 80518, 22305, Lannion Cedex, France aut Moadhen A. Unité Nanomatériaux Et Photonique, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 El Manar, Tunis, Tunisia aut Haji L. CNRS-UMR 6082, Université Européenne de Bretagne, ENSSAT 6 Rue Kerampont, BP 80518, 22305, Lannion Cedex, France aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/1(2015-02-01), 239-245 1380-2224 22:1<239 2015 22 10934 https://doi.org/10.1007/s10934-014-9890-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-014-9890-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dridi H. CNRS-UMR 6082, Université Européenne de Bretagne, ENSSAT 6 Rue Kerampont, BP 80518, 22305, Lannion Cedex, France aut NATIONALLICENCE 700 1- Moadhen A. Unité Nanomatériaux Et Photonique, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 El Manar, Tunis, Tunisia aut NATIONALLICENCE 700 1- Haji L. CNRS-UMR 6082, Université Européenne de Bretagne, ENSSAT 6 Rue Kerampont, BP 80518, 22305, Lannion Cedex, France aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/1(2015-02-01), 239-245 1380-2224 22:1<239 2015 22 10934