000153590 001__ 153590
000153590 005__ 20251017144606.0
000153590 0247_ $$2doi$$a10.1016/j.surfin.2025.106415
000153590 0248_ $$2sideral$$a143730
000153590 037__ $$aART-2025-143730
000153590 041__ $$aeng
000153590 100__ $$aZappalà, Giulia
000153590 245__ $$aAtomic layer deposition of hafnium dioxide for increasing temporal stability of silver-capped silicon nanopillar substrates used for SERS
000153590 260__ $$c2025
000153590 5060_ $$aAccess copy available to the general public$$fUnrestricted
000153590 5203_ $$aSurface-enhanced Raman spectroscopy (SERS) is a label-free optical method employed due to its sensitivity and specificity. Metal nanoparticles are commonly used as SERS substrates for detection of molecules and any change in the metal affect the SERS performance. Silver (Ag) is a renowned plasmonic material, but it presents relatively poor chemical stability. The application of thin surface coatings has been recognized as an effective approach to enhance the chemical stability of Ag nanostructures, while preserving their desirable sensitivity.
Therefore, in this study 0–13 nm thick hafnium dioxide (HfO2) coatings, deposited by atomic layer deposition (ALD), have been investigated to improve the temporal stability of Ag-capped silicon nanopillar (NP) SERS substrates. Comprehensive characterization was performed, and the SERS performance were evaluated with two reporter molecules on uncoated Ag-capped NP substrates. They displayed significant variation over time, while substrates with ∼1.5 nm HfO2 exhibited superior signal stability and noise reduction. Over a 5-month period, substrate stability was tested for detection of the nitroaromatic explosive 2,4-dinitrophenol. The limit of detection (LoD) and limit of quantification (LoQ) of uncoated Ag-capped NPs varied significantly, whereas HfO2-coated substrates maintained a stable SERS performance with limited variation in the LoD and LoQ, thereby ensuring consistent results.
000153590 536__ $$9info:eu-repo/grantAgreement/EC/H2020/883390/EU/Advanced Surface Enhanced Raman Spectroscopy (SERS) based technologies for gas and liquids sensING in the area of chemical protection/SERSing$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 883390-SERSing
000153590 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000153590 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000153590 700__ $$aThamdrup, Lasse Højlund Eklund
000153590 700__ $$aAbbaspourmani, AmirAli
000153590 700__ $$aDumont, Elodie
000153590 700__ $$aWu, Kaiyu
000153590 700__ $$aShkondin, Evgeniy
000153590 700__ $$0(orcid)0000-0002-4758-9380$$aMallada, Reyes$$uUniversidad de Zaragoza
000153590 700__ $$0(orcid)0000-0001-9897-6527$$aPina, Maria Pilar$$uUniversidad de Zaragoza
000153590 700__ $$aRindzevicius, Tomas
000153590 700__ $$aBoisen, Anja
000153590 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química
000153590 773__ $$g64 (2025), 106415 [11 pp.]$$tSurfaces and Interfaces$$x2468-0230
000153590 8564_ $$s7884971$$uhttps://zaguan.unizar.es/record/153590/files/texto_completo.pdf$$yVersión publicada
000153590 8564_ $$s2487068$$uhttps://zaguan.unizar.es/record/153590/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000153590 909CO $$ooai:zaguan.unizar.es:153590$$particulos$$pdriver
000153590 951__ $$a2025-10-17-14:15:23
000153590 980__ $$aARTICLE