Efficient single cell monitoring of pathogenic bacteria using bimetallic nanostructures embedded in gradient porous silicon

Jabbar, Allaa A.; Alwan, Alwan M.; Zayer, Mehdi Q.; Bohan, Azhar J.

doi:10.1016/j.matchemphys.2019.122359

Cited by 37 publications

(19 citation statements)

References 41 publications

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“…Presently, PhC-based photonic devices, such as optical switches, reconfigurable biosensors, multimode biosensors, photovoltaic cells, solar cells and loss-free optical waveguides, are being used in engineering and technological applications [12][13][14], which makes PhCs one of the hot research fields for photonics, electromagnetic, biological and biomedical engineering [15][16][17][18]. The introduction of the defect layer between PhC results in the localization of photons by means of a single transmission peak called the resonant mode inside PBG, because of a break in the periodicity of the structures [19][20][21][22][23][24][25]. This resonant mode allows the incident radiation of resonant wavelengths to pass through the structure.…”

Section: Introductionmentioning

confidence: 99%

“…Motivated by the aforementioned piece of excellent research work [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] in this paper, we propose a 1D photonic crystal (PhC) capable of sensing minute change in the refractive index of blood samples containing progesterone and estradiol reproductive hormones of different concentration levels in women. This design measures the shift in position of the defect mode inside PBG of the proposed structure depending upon the change in the refractive index of blood samples containing progesterone and estradiol reproductive hormones of different concentration levels in women.…”

Section: Introductionmentioning

confidence: 99%

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Detection of Reproductive Hormones in Females by Using 1D Photonic Crystal-Based Simple Reconfigurable Biosensing Design

et al. 2021

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In this manuscript, we have explored the photonic biosensing application of the 1D photonic crystal (PhC) (AB)NCDC(AB)N, which is capable of detecting reproductive progesterone and estradiol hormones of different concentration levels in blood samples of females. The proposed structure is composed of an air cavity surrounded by two buffer layers of material MgF2, which is sandwiched between two identical 1D sub PhCs (AB)N. Both sub PhCs are made up of alternate layers of materials, SiO2 and Si, of period 5. MATLAB software has been used to obtain transmission characteristics of the structure corresponding TE wave, only with the help of the transfer matrix method. The mainstay of this research is focused on the dependence of the intensity and position of the defect mode inside the photonic bandgap with respect to reproductive hormone concentrations in blood samples, change in the thickness of the cavity region and change in angle of incidence corresponding to TE wave only. The proposed design shows high sensitivity of 98.92 nm/nmol/L and 96.58 nm/nmol/L when the cavity of a thickness of 340 nm is loaded with progesterone and estradiol hormones of concentrations of 80 nmol/L and 11 nmol/L, respectively, at an incident angle of 20°. Apart from sensitivity, other parameters such as quality factor and figure of merit have also been computed to gain deep insight about the sensing capabilities of the proposed design. These findings may pave the path for the design and development of various sensing devices capable of detecting gynecological problems pertaining to reproductive hormones in females. Thus, the simple design and excellent performance makes our design most efficient and suitable for sensing applications in industrial and biomedical fields.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection of Reproductive Hormones in Females by Using 1D Photonic Crystal-Based Simple Reconfigurable Biosensing Design

et al. 2021

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“…In this case, the PBG appears as if it were a complete bandgap and gives the chance for the resonant dip to be shifted over a wide bandgap. Recently, porous silicon (PSi) is a very hot two-dimensional material to be used in photonic crystals [34][35][36][37][38]. It has a low mass and high surface area within a small volume.…”

Section: Introductionmentioning

confidence: 99%

Remote Temperature Sensor Based on Tamm Resonance

Zaky

Ahmed

Aly

2021

Silicon

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A highly-sensitive remote temperature sensor based on Tamm resonance is proposed using a one-dimensional photonic crystal. The proposed structure is prism/Ag/Toluene/SiO 2 /(PSi 1 /PSi 2) N /Si. The transfer matrix method is used to discuss the interaction between the structure and the S-polarization of the incident radiation waves. We optimized the structure by studying the effect of the incident angle, the thickness of the first and second layers of the photonic crystal unit cell, the porosity of them, and the thickness of the toluene layer. High sensitivity, high signal-to-noise ratio, and very low resolution are achieved due to the coupling between the porous silicon photonic crystal properties and Tamm resonance that makes it very distinguished compared to previous works.

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“…Furthermore, the significant advantage of this technique over the other approaches is the formation of high surface-purity nanoparticles without counter ions or residuals of the reducing agents left over on the surfaces of the nanoparticles [8][9][10]. The surface enhanced Raman scattering (SERS) sensors were prepared via the ion reduction process of silver and gold ions by the dangling bonds of the porous silicon layer and, hence, the fabrication of porous silicon-based SERS sensors [11][12][13]. Colloidal suspensions of plasmonic nanoparticles were deposited on glass substrates immobilize them and to inspection those for possible request as an active substrate for sensing of Rohdamine 6G (R6G) via glass-based SERS sensors.…”

Section: Introductionmentioning

confidence: 99%

“…The consequences of SERS and hence the improvement of the Raman signal are mainly due to the inelastic scattering of specific target molecules in the presence of plasmonic metallic nanoparticles [13]. The main reason behind this improvement is the energy transfer process among the nanoparticles and the target molecules on the based substrate (porous silicon, rough surface and glass substrate).…”

Section: Introductionmentioning

confidence: 99%

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

Alwan

Mohammed

Shehab

2020

eijs

Self Cite

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The influence of different types of plasmonic gold (Au-NPs) and silver (Ag-NPs) nanoparticles as well as aging on the performance of Surface-Enhanced Raman Scattering (SERS) sensors were studied. The average diameters of Au-NPs and Ag-NPs were about 23 nm and 15 nm, respectively, with a number of laser pulses of about 200. plasmonic nanoparticles were synthesized by laser ablation process in distilled water using a fixed energy laser fluence of about 14 J/cm2 of Nd-YAG laser, with 1060 nm wavelength and 1 Hz pulse repetition rate. The SERS sensor was carried out by quick drop casting process of plasmonicplasmonic nanoparticles on glass substrates. The morphological aspects and the performance of SERS sensors were investigated by high resolution transmission electron microscopy (HR-TEM) and Raman spectroscopy. All the results indicated the significant dependence of the performance of the sensor on the types of the plasmonic nanoparticles . The obtained Raman signal intensity of Ag-NPs was about 105a.u. compared with 103a.u. for Au-NPs. While, the stability of Au-NPs was much higher than that of Ag-NPs based on SERS sensors due to the normal oxidation process of Ag-NPs.

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Efficient single cell monitoring of pathogenic bacteria using bimetallic nanostructures embedded in gradient porous silicon

Cited by 37 publications

References 41 publications

Detection of Reproductive Hormones in Females by Using 1D Photonic Crystal-Based Simple Reconfigurable Biosensing Design

Detection of Reproductive Hormones in Females by Using 1D Photonic Crystal-Based Simple Reconfigurable Biosensing Design

Remote Temperature Sensor Based on Tamm Resonance

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

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