121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-506
Subject SERS activity of Ultrahigh-Density Tunable Au Nanoparticle Cluster Arrays for Tip-blobbed Au Nanoframe Structures
Authors Hajir Hilal Khaleel Al Hammad, Sungho Park1,*
Department of Chemistry, Sungkyunkwan University, Iraq
1Department of Chemistry, Sungkyunkwan University, Korea
Abstract The Au nanoframes have attractive considerable interest due to their unique optical properties especially strong surface plasmon resonate (SPR) and tunable optical signal by changing their aspect ratio comparing to Au solid NPs. The Au nanoframes are excellent building blocks for SERS substrates in that they provide intraparticle hotspots, which leads to superior SERS activity compared with Au solid NPs. We synthesized Tip-blobbed Au nanoframe (TBNFs). By adding Au ions to Pt nanpframe, Au ions will deposited on tip sites of Pt nanoframe due to Au-Pt lattice mismatch is higher than Au-Au lattice mismatch. By using Pt nanoframe as a templets , we could obtained different rim thickness of TBNFs in the wavelengths ( 700nm~1000nm ), This close degree between surface plasmon resonance peak and excitation wavelength of SERS dominate the SERS activity. Herein, we compare surface enhancement Raman scattering (SERS) enhancement of hotspot at Ultrahigh-Density Tunable Cluster Arrays which referee to hotspot at single particle, Dimers, Trimers and Hexamers arrays of Au nanoframe. For light polarization perpendicular to the Dimers, Trimers and Hexamers axis, the resonance is sensitive to hole distance, when metal NPs are assembled and closed to each others different plasmonic modes interact by near-field coupling as a result of the limitation and transfer of the electromagnetic field energy, which means including near-field interactions from inter-particles in the clusters and far-field interaction from inter-clusters in the arrays. Due to the optical structure and arbitrary nanoparticles design these NPs cluster arrays had important application in many fields, such as sensors, photoelectric device, magnetic storage device and biointerfaces.
E-mail HILAL.HAJER@GMAIL.COM