HOW GAP DISTANCE BETWEEN GOLD NANOPARTICLES IN DIMERS AND TRIMERS ON METALLIC AND NON-METALLIC SERS SUBSTRATES CAN IMPACT SIGNAL ENHANCEMENT

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dc.contributor.authorArbuz, Alexandr
dc.contributor.authorSultangaziyev, Alisher
dc.contributor.authorRapikov, Alisher
dc.contributor.authorKunushpayeva, Zhanar
dc.contributor.authorBukasov, Rostislav
dc.date.accessioned2022-03-09T14:37:15Z
dc.date.available2022-03-09T14:37:15Z
dc.date.issued2022
dc.description.abstractThe impact of variation in the interparticle gaps in dimers and trimers of gold nanoparticles (AuNPs), modified with Raman reporter (2-MOTP), on surface-enhanced Raman scattering (SERS) intensity, relative to the SERS intensity of a single AuNP, is investigated in this paper. The dimers, trimers, and single particles are investigated on the surfaces of four substrates: gold (Au), aluminium (Al), silver (Ag) film, and silicon (Si) wafer. The interparticle distance between AuNPs was tuned by selecting mercaptocarboxylic acids of various carbon chain lengths when each acid forms a mixed SAM with 2- MOTP. The SERS signal quantification was accomplished by combining maps of SERS intensity from a Raman microscope, optical microscope images ( 100), and maps/images from AFM or SEM. In total, we analysed 1224 SERS nanoantennas (533 dimers, 648 monomers, and 43 trimers). The average interparticle gaps were measured using TEM. We observed inverse exponential trends for the Raman intensity ratio and enhancement factor ratio versus gap distance on all substrates. Gold substrate, followed by silicon, showed the highest Raman intensity ratio (9) and dimer vs. monomer enhancement factor ratio (up to 4.5), in addition to the steepest inverse exponential curve. The results may help find a balance between SERS signal reproducibility and signal intensity that would be beneficial for future agglomerated NPs in SERS measurements. The developed method of 3 to 1 map combination by an increase in image transparency can be used to study structure–activity relationships on various substrates in situ, and it can be applied beyond SERS microscopy.en_US
dc.identifier.citationArbuz, A., Sultangaziyev, A., Rapikov, A., Kunushpayeva, Z., & Bukasov, R. (2022). How gap distance between gold nanoparticles in dimers and trimers on metallic and non-metallic SERS substrates can impact signal enhancement. Nanoscale Advances, 4(1), 268–280. https://doi.org/10.1039/d1na00114ken_US
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/6087
dc.language.isoenen_US
dc.publisherNanoscale Advancesen_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectType of access: Open Accessen_US
dc.subjectgold nanoparticlesen_US
dc.titleHOW GAP DISTANCE BETWEEN GOLD NANOPARTICLES IN DIMERS AND TRIMERS ON METALLIC AND NON-METALLIC SERS SUBSTRATES CAN IMPACT SIGNAL ENHANCEMENTen_US
dc.typeArticleen_US
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