Abstract

A study of the surface-enhanced infrared absorption (SEIRA) spectroscopy of para-nitrobenzoic acid (PNBA) adsorbed on thermally evaporated silver films has been conducted to determine the effect of film architecture on the magnitude of the SEIRA enhancement. Ordered arrays of uniformly sized silver nanoparticles, termed periodic particle arrays (PPAs), were prepared on several different infrared transparent substrates (germanium, silicon, and mica) by nanosphere lithography (NSL). It was found that the ordered arrays deposited by NSL produced well-defined and intense surface plasmon resonance (SPR) bands in the infrared at frequencies between 1500 and 4000cm -1. The peak frequency of these infrared SPR bands depended on the array architecture and the substrate material. By appropriate design of the nanoparticle array, the infrared SPR band can be made to be coincident with the SEIRA sensitive infrared bands of the PNBA. The trends in the infrared SPR peak frequencies and band shapes were consistent with predictions from electrodynamic theory. The SEIRA responses per unit area of deposited metal obtained with the PPA-type films were at best comparable to results obtained with disordered silver and gold films deposited on the same substrate materials by thermal evaporation (i.e., in the absence of any NSL masking spheres). The results of this study are most consistent with theories and models that attribute SEIRA to the dielectric constant and optical extinction spectrum of the metal film. Index Headings: Infrared spectroscopy; Surface-enhanced infrared absorption; Plasmon; SEIRA.

Surface plasmon-enhanced photoluminescence of DCJTB by using silver nanoparticle arrays

Hsiang-Lin Huang, Chen Feng Chou, Shi Hua Shiao, Yi-Cheng Liu, Jian-Jang Huang, Shien Uang Jen, and Hai-Pang Chiang
Opt. Express 21(S5) A901-A908 (2013)

RF sputtered amorphous chalcogenide thin films for surface enhanced infrared absorption spectroscopy

F. Verger, V. Nazabal, F. Colas, P. Němec, C. Cardinaud, E. Baudet, R. Chahal, E. Rinnert, K. Boukerma, I. Peron, S. Deputier, M. Guilloux-Viry, J.P. Guin, H. Lhermite, A. Moreac, C. Compère, and B. Bureau
Opt. Mater. Express 3(12) 2112-2131 (2013)

Tunable lasing on silver island films by coupling to the localized surface plasmon

Shuya Ning, Zhaoxin Wu, Hua Dong, Fang Yuan, Lin Ma, Bo Jiao, and Xun Hou
Opt. Mater. Express 5(3) 629-638 (2015)

Rational design and optimization of plasmonic nanoarrays for surface enhanced infrared spectroscopy

Vladimir Liberman, Ronen Adato, Thomas H. Jeys, Brian G. Saar, Shyamsunder Erramilli, and Hatice Altug
Opt. Express 20(11) 11953-11967 (2012)

Tuning plasmons of metal-coated microsphere arrays towards optimized surface-enhanced spectroscopy

Narcisa Nechita and Cosmin Farcău
Opt. Express 29(25) 42238-42250 (2021)