Spectroscopic ellipsometer study of correlation of out of plane and in-plane plasmons in silver nanoislands with annealing induced growth

Arya, Mahima; Mitra, Anirban; Nath, R.

doi:10.1016/j.vacuum.2017.06.042

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…[31,32] The out-ofplane LSPR (o-LSPR) and interband transition of ZrN thin films in the ultraviolet region are examined by Gaussian and Lorentz functions. [33] 3a). This indicates that the surface of ZrN thin films might not be conductive below the turn-on Ar sequence of 50s.…”

Section: Resultsmentioning

confidence: 98%

“…[31,32] Note that the optimization of the sputtered Au thin film related to spectroscopy enhancement can see elsewhere. [33,34] In more details, it should be noted that the infrared absorption related to the metallic behavior of ZrN thin films, especially the conductivity due to free electron, is determined via Drude function. [31,32] The absorption referred to the localized surface plasmon resonance (LSPR) and inhomogeneous broadening LSPR (i-LSPR) in the visible and near infrared regions are identified by two Gaussian functions.…”

Section: Resultsmentioning

confidence: 99%

“…[ 31,32 ] The out‐of‐plane LSPR (o‐LSPR) and interband transition of ZrN thin films in the ultraviolet region are examined by Gaussian and Lorentz functions. [ 33 ] Figure 2c,d present the proposed model fitting results of ZrN 20:6 which are performed at difference incident angles (55°, 65°, and 75°) as a function of photon energy.…”

Section: Resultsmentioning

confidence: 99%

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Reusability, Long‐Life Storage and Highly Sensitive Zirconium Nitride (ZrN) Surface‐Enhanced Raman Spectroscopy (SERS) Substrate Fabricated by Reactive Gas‐Timing Rf Magnetron Sputtering

Sucheewa,

Wongwiriyapan,

Rattanawarinchai

et al. 2023

Adv Materials Inter

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Transition metal nitrides (TMN) are promising material alternative to replace noble metals in the field of plasmonic applications, especially surface‐enhanced Raman spectroscopy (SERS). Here we demonstrate a practical surface enhanced Raman spectroscopy (SERS) substrate using zirconium nitride (ZrN) thin films grown by reactive gas‐timing (RGT) rf magnetron sputtering. The tailored properties of ZrN thin film exploited for SERS activity could be achieved to obtain a highly sensitive ZrN thin film SERS substrate with the enhancement factor (EF) of 1.24 × 106 and 4.8 %RSD at 1626 cm‐1 toward methylene blue (MB) analyte which are comparable to the optimized Au sputtered thin films (EF=1.18 × 106 and with 5.1%RSD). We find that the spatial plasmonic hotspots on the surface of ZrN SERS substrate controlled by the turn‐on timing of Ar:N2 sputtered gas sequence, leading to the discrete conductive surface profile, strongly relates to non‐stoichiometric composition and the degree of (200)‐oriented texture at the surface of ZrN thin film. Furthermore, ZrN thin film SERS substrates exhibit an excellent recyclability more than 30 cycles with simple cleaning process and a storage time longer than 6 months. The detection and reusability of ZrN SERS substrate on the low concentration of trinitrotoluene (TNT) for homeland security are also performed.

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Section: Resultsmentioning

confidence: 98%