The Performance of Plasmonic Gold and Silver Nanoparticle-Based SERS Sensors

Alwan, Alwan M.; Mohammed, Mohammed S.; Shehab, Russul M.

doi:10.24996/ijs.2020.61.6.10

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…The results also reveal the positive values of ΔS°, which indicates that the change from the order to the disorder state may be the driving force behind the reaction, which is observed to be unfavored by enthalpy but entropically favored. The differences seen in the value of ΔS° among the studied groups are a good indication of variation in their conformational stability, molecular flexibility, complexity and structure rigidity [29,30].…”

Section: Kinetic and Thermodynamic Studiesmentioning

confidence: 99%

Synthesis of Silver Nanoparticles Using L.Rosa Flowers Extracts: Thermodynamic and Kinetic Studies on the Inhibitoty Effects of Nanoparticles on Creatine Kinase Activity

Khalaf

Ahmed

Mathkor

et al. 2021

eijs

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The present work investigates the synthesis of silver nanoparticles (AgNPs) by a biological method using L.Rosa flower extract and silver nitrate as precursors. Optimum conditions of synthesis were studies, such as pH, temperature, concentration of extract, concentration of silver nitrate, and stability with time. Characterization of AgNPs was carried out using UV-visible Spectroscopy, Scanning Electron Microscopy, X-Ray Diffraction, Fourier Transform Infrared and Transmission Electron Microscopy. The biosynthesized AgNPs exhibited inhibitory effects on creatine kinase activity in the sera of patients with myocardial infarction, compared with control subjects. Thermodynamic and kinetic studies of creatine kinase were performed. Further studies on other biological activities were performed to exploit AgNPs full potential. In conclusions, the present study utilize a simple, cheap and environmentally green method to synthesize silver nanoparticles. This single step procedure is more suitable for large scale production as it is rapid and eliminates the elaborate processes employed in the other bio-based protocols (e.g. by using fungi and bacteria).

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Section: Kinetic and Thermodynamic Studiesmentioning

confidence: 99%

Synthesis of Silver Nanoparticles Using L.Rosa Flowers Extracts: Thermodynamic and Kinetic Studies on the Inhibitoty Effects of Nanoparticles on Creatine Kinase Activity

Khalaf

Ahmed

Mathkor

et al. 2021

eijs

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show abstract

“…These nanostructures allow increasing the electric fields resulting from the LSPR of AgNPs and their overlap with those from the SPR of AgNWs. Thus, they achieve high intensity for SERS [16]. Dopamine (DA) has plentiful catechol and amine active groups that exist on the surface of molecules.…”

Section: Introductionmentioning

confidence: 99%

Signature of Plasmonic Nanostructures Synthesised by Electrical Exploding Wire Technique on Surface-Enhanced Raman Scattering

Hamzah

Mahmood

2021

eijs

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This work aims to fabricate two types of plasmonic nanostructures by electrical exploding wire (EEW) technique and study the effects of the different morphologies of these nanostructures on the absorption spectra and Surface-Enhanced Raman Scattering (SERS) activities, using Rhodamine 6G as a probe molecule. The structural properties of these nanostructures were examined using X-Ray diffraction (XRD). The morphological properties were examined using field emission scanning electron microscopy (FESEM) and scanning transmission electron microscopy (STEM). The absorption spectra of the mixed R6G laser dye (concentration 1×10-6 M) with prepared nanostructures were examined by double beam UV-Vis Spectrophotometer. The Raman spectra of the R6G mixed with the prepared nanostructures were examined using a Horiba HR Evolution 800 Raman microscope system with an objective lens (50 ×). The FESEM and STEM images indicated that the Ag nanoparticles (AgNPs) with 35 nm average particle sizes were decorated on the surface of the AgNWs and the PDA layer by EEW technique, forming AgNW@AgNPs and AgNW@PDA@AgNPs nanostructures. The results indicated that the increased intensities of the absorption spectra peaks and the SERS arise from the hot spots and the roughness of the surface of nanostructures. The SERS enhancement factor of R6G (1×10-6 M) was reached at 2.3×107 and 2.5×107, at the wave number of 1650 cm-1, for the AgNW@AgNPs and AgNW@PDA@AgNPs nanostructures, respectively, after being excited by (λexc. = 532 nm) laser source. It can be concluded that the AgNW@AgNPs and AgNW@PDA@AgNPs nanostructures were fabricated with an easy and simple way without the need for additional chemical compounds. These nanostructures attained a reliable and sensitive detection and can be utilized in a variety of SERS applications, such as chemical and biological sensors.

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Enhancing the performance of p_n junction Si solar cells by integrating silver core&gold shell nano-particles

Rashid¹,

Dheyab

Alwan

2022

Opt Quant Electron

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The Performance of Plasmonic Gold and Silver Nanoparticle-Based SERS Sensors

Cited by 4 publications

References 21 publications

Synthesis of Silver Nanoparticles Using L.Rosa Flowers Extracts: Thermodynamic and Kinetic Studies on the Inhibitoty Effects of Nanoparticles on Creatine Kinase Activity

Synthesis of Silver Nanoparticles Using L.Rosa Flowers Extracts: Thermodynamic and Kinetic Studies on the Inhibitoty Effects of Nanoparticles on Creatine Kinase Activity

Signature of Plasmonic Nanostructures Synthesised by Electrical Exploding Wire Technique on Surface-Enhanced Raman Scattering

Enhancing the performance of p_n junction Si solar cells by integrating silver core&gold shell nano-particles

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