Substrate Temperature Effect on Microstructure, Optical, and Glucose Sensing Characteristics of Pulsed Laser Deposited Silver Nanoparticles

Kamakshi, Koppole; Silva, José; Sekhar, K. C.; Moreira, J. Agostinho; Almeida, A.; Pereira, M.; Gomes, M. J. M.

doi:10.1007/s11468-017-0625-y

Cited by 14 publications

(11 citation statements)

References 32 publications

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“…9 The emission at 460 nm can be attributed to the SPR of Ag NPs. 6,9 The intensity ratio (I 390 /I 460 ) is determined to be 1.41 and thus it is concluded that the as-synthesized Ag NPs exhibit a higher UV light absorption. The XRD pattern of Ag NPs, shown in Figure 3b, consists of reflections corresponding to the (004), (101), (103), (006), and (201) lattice planes (JCPDS 41-1402) confirming the formation of Ag NPs with a hexagonal crystal structure.…”

Section: Resultsmentioning

confidence: 94%

“…The absorbance spectra of Ag NPs prepared using aloe vera leaves exhibit an additional peak at around 370 nm, which can be attributed to the quadrupolar resonance in addition to the primary dipole resonance. 6,9 The size of Ag NPs was determined using eq 1 and is tabulated in Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…The UV emission peak at 390 nm represents the radiative recombination of electrons and holes from the sp conduction band above the Fermi level to the d band. 6,22 The interband transitions become more prominent in the case of MNPs than that in their bulk counterpart because of the reduced number of atoms. 9 The emission at 460 nm can be attributed to the SPR of Ag NPs.…”

Section: Resultsmentioning

confidence: 99%

“…8,9 Therefore, the sensing ability of Ag NPs using different analytes such as glucose, triacylglyceride, and so on has been explored. 5,6,10,11 In our previous work, pulsed laser-deposited Ag NPs were investigated for glucose sensing and achieved a sensitivity of 14.8 nm/mM. 6 Recently, MNPs are considered as a class of efficient photocatalysts because of their additional advantages compared to conventional semiconductor-based photocatalysts including the better affinity to many reactants and ability to utilize the full solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

“…5,6,10,11 In our previous work, pulsed laser-deposited Ag NPs were investigated for glucose sensing and achieved a sensitivity of 14.8 nm/mM. 6 Recently, MNPs are considered as a class of efficient photocatalysts because of their additional advantages compared to conventional semiconductor-based photocatalysts including the better affinity to many reactants and ability to utilize the full solar spectrum. 12 In this context, Tamuly et al investigated the photodegradation of methyl red dye using Ag NPs under UV light and found that the rate of degradation depends on the Ag NP concentration.…”

Section: Introductionmentioning

confidence: 99%

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Green Synthesized Ag Nanoparticles for Bio-Sensing and Photocatalytic Applications

et al. 2020

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In this work, sensing and photocatalytic activities of green synthesized silver nanoparticles (Ag NPs) are investigated. Ag NPs have been synthesized by the reduction of silver nitrate (AgNO3) using different leaf extracts. An optimum surface plasmon resonance (SPR) behavior is obtained for neem leaf extracts because of the presence of a high concentration of diterpenoids, as evidenced from gas chromatography mass spectroscopy results. The underlying mechanism for the formation of Ag NPs is highlighted. The Ag NPs are in spherical shape and exhibit the hexagonal crystal phase and also show a good stability. The biosensing property of the Ag NPs is evaluated using mancozeb (MCZ) agro-fungicide, and the SPR peak position exhibited a linear response with MCZ concentration. The sensitivity is found to be 39.1 nm/mM. Further, the photocatalytic activity of Ag NPs is tested using 0.5 mM MCZ solution as a model under UV–visible illumination. It is observed that photocatalytic activity is caused by the formation of reactive oxygen species. Therefore, the green synthesized Ag NPs are potential candidates for biosensing and photocatalytic applications.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Green Synthesized Ag Nanoparticles for Bio-Sensing and Photocatalytic Applications

et al. 2020

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Effect of Configuration on the Photocatalytic Activity of AgNPs-TiO2 System

Liu

et al. 2018

Plasmonics

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Application of Localized Surface Plasmon Resonance of Conjugated Gold Nanoparticles in Spectral Diagnosis of SARS-CoV-2: A Numerical Study

2023

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Severe respiratory syndrome COVID-19 (SARS-CoV-2) outbreak has became the most important global health issue, and simultaneous efforts to fast and low-cost diagnosis of this virus were performed by researchers. One of the most usual tests was colorimetric methods based on the change of color of gold nanoparticles in the presence of viral antibodies, antigens, and other biological agents. This spectral change can be due to the aggregation of the particles or the shift of localized surface plasmon resonance due to the electrical interactions of surface agents. It is known that surface agents could easily shift the absorption peak of metallic nanocolloids which is attributed to the localized surface plasmon resonance. Experimental diagnosis assays for colorimetric detection of SARS-CoV-2 using Au NPs were reviewed, and the shift of absorption peak was studied from the viewpoint of numerical analysis. Using the numerical method, the refractive index and real and imaginary parts of the effective relative permittivity of the viral biological shell around Au NPs were obtained. This model gives a quantitative description of colorimetric assays of the detection of SARS-CoV-2 using Au NPs.

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Substrate Temperature Effect on Microstructure, Optical, and Glucose Sensing Characteristics of Pulsed Laser Deposited Silver Nanoparticles

Cited by 14 publications

References 32 publications

Green Synthesized Ag Nanoparticles for Bio-Sensing and Photocatalytic Applications

Green Synthesized Ag Nanoparticles for Bio-Sensing and Photocatalytic Applications

Effect of Configuration on the Photocatalytic Activity of AgNPs-TiO2 System

Application of Localized Surface Plasmon Resonance of Conjugated Gold Nanoparticles in Spectral Diagnosis of SARS-CoV-2: A Numerical Study

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