TY - JOUR
T1 - Plasmonic Nanowires for Wide Wavelength Range Molecular Sensing
AU - Marinaro, Giovanni
AU - Das, Gobind
AU - Giugni, Andrea
AU - Allione, Marco
AU - Torre, Bruno
AU - Candeloro, Patrizio
AU - Kosel, Jürgen
AU - Di Fabrizio, Enzo M.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: DFT calculations were carried out using the resources of the Supercomputing Laboratory at King Abdullah University of Science & Technology (KAUST) in Thuwal, Saudi Arabia
PY - 2018/5/17
Y1 - 2018/5/17
N2 - In this paper, we propose the use of a standing nanowires array, constituted by plasmonic active gold wires grown on iron disks, and partially immersed in a supporting alumina matrix, for surface-enhanced Raman spectroscopy applications. The galvanic process was used to fabricate nanowires in pores of anodized alumina template, making this device cost-effective. This fabrication method allows for the selection of size, diameter, and spatial arrangement of nanowires. The proposed device, thanks to a detailed design analysis, demonstrates a broadband plasmonic enhancement effect useful for many standard excitation wavelengths in the visible and NIR. The trigonal pores arrangement gives an efficiency weakly dependent on polarization. The devices, tested with 633 and 830 nm laser lines, show a significant Raman enhancement factor, up to around 6 × 10⁴, with respect to the flat gold surface, used as a reference for the measurements of the investigated molecules.
AB - In this paper, we propose the use of a standing nanowires array, constituted by plasmonic active gold wires grown on iron disks, and partially immersed in a supporting alumina matrix, for surface-enhanced Raman spectroscopy applications. The galvanic process was used to fabricate nanowires in pores of anodized alumina template, making this device cost-effective. This fabrication method allows for the selection of size, diameter, and spatial arrangement of nanowires. The proposed device, thanks to a detailed design analysis, demonstrates a broadband plasmonic enhancement effect useful for many standard excitation wavelengths in the visible and NIR. The trigonal pores arrangement gives an efficiency weakly dependent on polarization. The devices, tested with 633 and 830 nm laser lines, show a significant Raman enhancement factor, up to around 6 × 10⁴, with respect to the flat gold surface, used as a reference for the measurements of the investigated molecules.
UR - http://hdl.handle.net/10754/627940
UR - http://www.mdpi.com/1996-1944/11/5/827
UR - http://www.scopus.com/inward/record.url?scp=85047114467&partnerID=8YFLogxK
U2 - 10.3390/ma11050827
DO - 10.3390/ma11050827
M3 - Article
C2 - 29772804
AN - SCOPUS:85047114467
VL - 11
SP - 827
JO - Materials
JF - Materials
SN - 1996-1944
IS - 5
ER -