@article {Araujo2014,
	title = {{Highly efficient nanoplasmonic SERS on cardboard packaging substrates}},
	journal = {Nanotechnology},
	volume = {25},
	number = {41},
	year = {2014},
	note = {n/a},
	abstract = {<p>{\textcopyright} 2014 IOP Publishing Ltd. This work reports on highly efficient surface enhanced Raman spectroscopy (SERS) constructed on low-cost, fully recyclable and highly reproducible cardboard plates, which are commonly used as disposable packaging material. The active optical component is based on plasmonic silver nanoparticle structures separated from the metal surface of the cardboard by a nanoscale dielectric gap. The SERS response of the silver (Ag) nanoparticles of various shapes and sizes were systematically investigated, and a Raman enhancement factor higher than 106for rhodamine 6G detection was achieved. The spectral matching of the plasmonic resonance for maximum Raman enhancement with the optimal local electric field enhancement produced by 60 nm-sized Ag NPs predicted by the electromagnetic simulations reinforces the outstanding results achieved. Furthermore, the nanoplasmonic SERS substrate exhibited high reproducibility and stability. The SERS signals showed that the intensity variation was less than 5{\%}, and the SERS performance could be maintained for up to at least 6 months.</p>
},
	keywords = {Plasmonics, SERS substrates, Silver nanoparticles},
	issn = {13616528},
	doi = {10.1088/0957-4484/25/41/415202},
	author = {Ara{\'u}jo, A and Caro, C. and Mendes, MJ and Nunes, D. and Fortunato, E. and Franco, R and {\'A}guas, H. and Martins, R.}
}
