TY - JOUR
T1 - Silver self aggregation in a nanodevice for enhanced Raman spectroscopy
T2 - Experiments vs. simplified modeling via molecular dynamics
AU - Babiaczyk, Wojtek Iwo
AU - Bonella, Sara
AU - Ciccotti, Giovanni
AU - Coluccio, Maria Laura
AU - Gentile, Francesco
AU - Di Fabrizio, Enzo
PY - 2012/4/7
Y1 - 2012/4/7
N2 - We present a study, via experiments and exploratory molecular dynamics simulations, of self aggregation in cylindrical nanostructures obtained experimentally by combining high resolution electron beam lithography with electroless silver deposition. This process is key to the fabrication of a nanolens device, where a strong surface enhancement can be exploited for Raman spectroscopy. In order to investigate the process, we introduce a simple theoretical model and compare the results of simulations with the fabricated silver nanostructures during the growth phase. Our simulations qualitatively agree with the experiments and allow a general characterization of the process at length scales smaller than those easily accessible by microscopy. We identify a geometrical parameter, the aspect ratio of the cylinder, that relates two different types of growth with different characteristics and, possibly, different Raman enhancements.
AB - We present a study, via experiments and exploratory molecular dynamics simulations, of self aggregation in cylindrical nanostructures obtained experimentally by combining high resolution electron beam lithography with electroless silver deposition. This process is key to the fabrication of a nanolens device, where a strong surface enhancement can be exploited for Raman spectroscopy. In order to investigate the process, we introduce a simple theoretical model and compare the results of simulations with the fabricated silver nanostructures during the growth phase. Our simulations qualitatively agree with the experiments and allow a general characterization of the process at length scales smaller than those easily accessible by microscopy. We identify a geometrical parameter, the aspect ratio of the cylinder, that relates two different types of growth with different characteristics and, possibly, different Raman enhancements.
UR - http://www.scopus.com/inward/record.url?scp=84861880087&partnerID=8YFLogxK
U2 - 10.1039/c2nr30145h
DO - 10.1039/c2nr30145h
M3 - Article
C2 - 22395778
AN - SCOPUS:84861880087
SN - 2040-3364
VL - 4
SP - 2362
EP - 2371
JO - Nanoscale
JF - Nanoscale
IS - 7
ER -