Use of gold nanoparticle containing poly (allylamine hydrochloride)/ poly (acrylic acid) multilayer films as sers substrates

Kölemen, Birsu
Surface-enhanced Raman spectroscopy (SERS) is a surface sensitive vibrational spectroscopy technique that results in the enhancement of Raman scattering by molecules adsorbed on rough metal surfaces. It is a powerful, sensitive and non-destructive technique which is used in chemical, material and life sciences including biosensing, catalysis, spectroelectrochemistry, criminology, single molecule SERS applications and many others. Nanoparticle (NP) embedded multilayer films using Layer by Layer (LbL) technique is one of the types of SERS substrates that have unique properties. Herein, pH-controllable exponentially grown (rougher) and linear grown (smoother) (Poly(allylamine hydrochloride)/Poly(acrylic acid)) polyelectrolyte-NP multilayer film systems were studied for sensing benzenethiol (BT) molecule (up to 10-7M). The effects of number of polyelectrolyte layers and deposition times of gold (Au) NPs on SERS signals were studied and the enhancements in Raman signals are similar for all the studied systems. Characterizations of these surfaces are made by UV-vis Spectrometer, Zeta sizer, Atomic Force Microscope (AFM) and Raman Spectrometer.


TiN(IV) oxide coated gold nanoparticles: synthesis, characterization and investigation of surface enhanced raman scattering activities
Elçi, Aylin; Nalbant Esentürk, Emren; Department of Chemistry (2017)
Noble metal nanoparticles (i.e. gold (Au) and silver (Ag)) have received enormous attention due to their superior optical properties related to localized surface plasmon resonance (LSPR) and their potential applications in sensing, imaging, catalysis and optoelectronic devices. In particular, the ones with anisotropic morphologies have attracted intense interest from the researchers because of their superior optoelectronic properties. High electromagnetic field forms on the nanoparticle surface. The intensi...
Observation of Oscillatory Surface Reactions of Riboflavin, Trolox, and Singlet Oxygen Using Single Carbon Nanotube Fluorescence Spectroscopy
Sen, Fatih; Boghossian, Ardemis A.; Sen, Selda; Ulissi, Zachary W.; Zhang, Jingqing; Strano, Michael S. (2012-12-01)
Single-molecule fluorescent microscopy allows semiconducting single-walled carbon nanotubes (SWCNTs) to detect the adsorption and desorption of single adsorbate molecules as a stochastic modulation of emission intensity. In this study, we identify and assign the signature of the complex decomposition and reaction pathways of riboflavin in the presence of the free radical scavenger Trolox using DNA-wrapped SWCNT sensors dispersed onto an aminopropyltriethoxysilane (APTES) coated surface. SWCNT emission is qu...
Properties of Al2O3: nc-Si nanostructures formed by implantation of silicon ions into sapphire and amorphous films of aluminum oxide
Tetelbaum, D. I.; Mikhaylov, A. N.; Belov, A. I.; Ershov, A. V.; Pitirimova, E. A.; Plankina, S. M.; Smirnov, V. N.; Kovalev, A. I.; Turan, Raşit; Yerci, Selçuk; Finstad, T. G.; FOSS, SEAN (2009-02-01)
Photoluminescence, infrared Fourier spectroscopy, Raman scattering, transmission electron microscopy, and electron diffraction were used to study the luminescent, optical, and structural properties of aluminum oxide layers (sapphire and films of Al2O3 deposited on silicon) implanted with Si+ to produce silicon nanocrystals. It is established that, in both cases, a high-temperature annealing of heavily implanted samples brings about the formation of silicon nanocrystals. However, the luminescent properties o...
Akbıyık, Alp; Bek, Alpan; Department of Physics (2022-6-10)
In this thesis, Surface-Enhanced Raman Spectroscopy (SERS) substrates are fabricated using laser assisted chemical etching of silicon as a surface nanostructuring technique. As a novel method of control over the structuring parameters, the incident laser illumination is spatially modified via a Digital Micromirror Device (DMD) that enable fast and uniform fabrication of complex structures. Onto the photochemically nanostructured silicon surfaces, silver and gold films are deposited by thermal evaporation or...
Yüksel, Selen; Bek, Alpan; Taşgın, Mehmet Emre; Department of Micro and Nanotechnology (2023-1-26)
Surface Enhanced Raman Scattering (SERS) is a surface-sensitive vibrational spectroscopy technique. Highly SERS-active substrates made of nanostructured noble metals have been widely investigated owing their activity to the formation of localized surface plasmon resonances, hotspots, where electromagnetic field is amplified by several orders of magnitude locally. Silver and gold are the two most studied noble metals due to their especially low losses and hence high enhancement factors (EF). Gold is chemical...
Citation Formats
B. Kölemen, “Use of gold nanoparticle containing poly (allylamine hydrochloride)/ poly (acrylic acid) multilayer films as sers substrates,” M.S. - Master of Science, Middle East Technical University, 2015.