Micro energy dispersive x-ray fluorescence as a powerful complementary technique for the analysis of bimetallic Au/Ag/glass nanolayer composites used in surface plasmon resonance sensors

Ghorbanpour, Mohammad; Falamaki, Cavus

doi:10.1364/ao.51.007733

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Voltage and current were 30 kV and 300 µA, respectively. Each micro‐energy dispersive X‐ray fluorescence (EDXRF) analysis was performed in 50 s to obtain sufficient counts [19].…”

Section: Methodsmentioning

confidence: 99%

Solid‐state immobilisation of titanium dioxide nanoparticles onto nanoclay

Ghorbanpour

Lotfiman

2016

Micro & Nano Letters

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The impregnation of nanoclay with TiO 2 was carried out by new and fast method. Nanoclay was submitted only to a single step molten salt process. Scanning electron microscopy showed that TiO 2 nanoparticles precipitated over the nanoclay surface after treatment. Structural characterisation of nanocomposite by X-ray diffraction displayed the change of basal peak after even 1 min process at both temperatures. UV-visible spectroscopy showed the presence of TiO 2. However, the band gap was not affected by process temperature and time. XRF graphs revealed that by increasing temperature and time of the molten salt process, the amount of loaded titanium dioxide on the nanoclays was enhanced. Through this quick process, an inexpensive nanocomposite with properties comparable with those from more elaborate processes is produced.

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“…Voltage and current were 30 kV and 300 µA, respectively. Each micro‐energy dispersive X‐ray fluorescence (EDXRF) analysis was performed in 50 s to obtain sufficient counts [19].…”

Section: Methodsmentioning

confidence: 99%

Solid‐state immobilisation of titanium dioxide nanoparticles onto nanoclay

Ghorbanpour

Lotfiman

2016

Micro & Nano Letters

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“…Each l-EDXRF analysis was performed in 50 s to obtain sufficient counts. For homogeneity tests, three different points of approximate constant orientation with respect to the nanocomposites were analyzed [15].…”

Section: Characterizationsmentioning

confidence: 99%

“…On the basis of the past researches, the intensity of the peak of the plot for each of the elements is directly related to their concentration [15]. The peck at the energy of 2.9 eV represents silver in the composite.…”

Section: Characterizationmentioning

confidence: 99%

Antibacterial silver-doped bioactive silica gel production using molten salt method

2016

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Due to broad-spectrum antimicrobial activity, silver nanoparticles have great application potential in disinfection of contaminated water. The aim of this research was the introduction of a fast and simple method titled as ''molten salt method'' for the production of silverdoped bioactive silica gel (SG) nanocomposite. In this method, SG was imposed into the molten salt of silver nitrate at 150 and 300°C for various times. Interestingly, molten salt method was not utilized any reducing reagent or other chemicals unless molten silver nitrate. The synthesis and fixing of nanoparticles into the support were done in \60 min. The prepared silver/SG nanocomposite was evaluated using scanning electron microscope (SEM), energy dispersive X-ray fluorescence, leaching test and antibacterial test. SEM images showed that the contact of SG with the molten salt caused the formation of nanoparticles on the SG. On the other hand, increasing the contact time, it led to a larger and increased number of particles. The antibacterial tests demonstrated that this composite is suitable for using as antibacterial material. The test of elution with water indicated that the prepared nanocomposite is stable and the amount of the released silver in the water was negligible.

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“…Au@Ag core-shell nanostructures exhibit finely tuned LSPR and SERS properties based on the shape and size, and have potential applications in sensors [91,97–99] and catalysis [100], thus many attempts have been made to prepare these nanostructures.…”

Section: Construction Of Core-shell Nanostructuresmentioning

confidence: 99%

Synthesis of Silver Nanostructures by Multistep Methods

Zhang

Song

Zhang

et al. 2014

Sensors

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The shape of plasmonic nanostructures such as silver and gold is vital to their physical and chemical properties and potential applications. Recently, preparation of complex nanostructures with rich function by chemical multistep methods is the hotspot of research. In this review we introduce three typical multistep methods to prepare silver nanostructures with well-controlled shapes, including the double reductant method, etching technique and construction of core-shell nanostructures. The growth mechanism of double the reductant method is that different favorable facets of silver nanocrystals are produced in different reductants, which can be used to prepare complex nanostructures such as nanoflags with ultranarrow resonant band bandwidth or some silver nanostructures which are difficult to prepare using other methods. The etching technique can selectively remove nanoparticles to achieve the aim of shape control and is widely used for the synthesis of nanoflowers and hollow nanostructures. Construction of core-shell nanostructures is another tool to control shape and size. The three methods can not only prepare various silver nanostructures with well-controlled shapes, which exhibit unique optical properties, such as strong surface-enhanced Raman scattering (SERS) signal and localized surface plasmon resonance (LSPR) effect, but also have potential application in many areas.

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Micro energy dispersive x-ray fluorescence as a powerful complementary technique for the analysis of bimetallic Au/Ag/glass nanolayer composites used in surface plasmon resonance sensors

Cited by 6 publications

References 7 publications

Solid‐state immobilisation of titanium dioxide nanoparticles onto nanoclay

Solid‐state immobilisation of titanium dioxide nanoparticles onto nanoclay

Antibacterial silver-doped bioactive silica gel production using molten salt method

Synthesis of Silver Nanostructures by Multistep Methods

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