RT Journal Article
T1 Nanostructured Au/Si substrate for organic molecule SERS detection
A1 Ignat, Teodora
A1 Munoz, Roberto
A1 Irina, Kleps
A1 Obieta, Isabel
A1 Mihaela, Miu
A1 Simion, Monica
A1 Iovu, Mircea
AB Nanoparticles of noble metals, such as gold and silver, exhibit unique and tunable optical properties on account of their surface plasmon resonance. In particular, gold nanoparticles on silicon substrates are attractive for future nanoscale sensors and optical devices due to their resistance to oxidation and due to their electrical and optical properties. In this study, we developed a nanostructured gold/macroporous silicon (Au/PS) substrate capped with 11-mercaptoundecanoic acid (11-MUA) with ultra-sensitive detection properties achieved in characterization, an approach based on surface-enhanced Raman scattering (SERS). Surface-enhanced Raman scattering allows us to detect substances at a low concentration level and to observe structural details of a thiol molecule bonded to small film thicknesses. Raman measurements were carried out at 514 nm and 785 nm. In order to emphasize the effect of the Si microstructuration on the efficiency of this new substrate (Au/PS) proposed for SERS experiments, the same molecule (11-MUA) was adsorbed on it as well as on gold/atomically flat silicon (Au/Si) and on commercial Klarite (Mesophotonics) substrates. Systematic studies realized by Raman spectroscopy, electron microscopy, and X-ray spectroscopy show the influence of silicon substrate texturing and metallic deposition conditions, including time and temperature on the optical phenomena.
SN 0749-6036
YR 2009
FD 2009-09
LK https://hdl.handle.net/11556/2972
UL https://hdl.handle.net/11556/2972
LA eng
NO Ignat , T , Munoz , R , Irina , K , Obieta , I , Mihaela , M , Simion , M & Iovu , M 2009 , ' Nanostructured Au/Si substrate for organic molecule SERS detection ' , Superlattices and Microstructures , vol. 46 , no. 3 , pp. 451-460 . https://doi.org/10.1016/j.spmi.2009.07.019
NO The authors thank PhD Adrian Dinescu for helping with the SEM experiments. This work was supported by the Ministry of Education and Research by the TD437/2007 and ID_ 884/2007 projects.
DS TECNALIA Publications
RD 30 jul 2024