Gold nanoparticles in ethanol deposited on PCF for refractive index sensors

Fakhri, Makram A.; Tawfiq, Zainab H.; Adnan, Salah A.

doi:10.1063/5.0000213

Cited by 14 publications

(6 citation statements)

References 38 publications

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“…As all measured surface constants are tabulated below in Table 1. Figure (12) presents the images of the FESEM of ablated gold NWs at different wavelengths, where the presented nanostructures that ablated at the lower wavelength (532 nm) clearly show that a smooth surface and more distributed, and the average diameter of the deposited nanostructure are ranged of 30-40 nm. The images also clearly showed that the nanostructure of the deposited gold as a result of its ablation at the higher wavelength (1064 nm) was well distributed and somewhat smoothed, but with less quality than what was obtained when using the simultaneous harmonic generation of the laser, and this result is consistent with what was previously discussed in the structural, optical, and the morphological results.…”

Section: Resultsmentioning

confidence: 99%

“…Because of its chemical stability and very large wavelength shift, gold is the most attractive material for SPR phenomena [9,10]. As the most conductive, plasmatic metal, silver is also used [11,12]. Despite the above, it has been found that there is a lot of unusual characteristics, for example, chemical instability and oxidation susceptibility [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Gold Nanowires Based on Photonic Crystal Fiber by Laser Ablation in Liquid to Improve Colon Biosensor

Fakhri¹,

Salim²,

Sulaiman³

et al. 2023

Plasmonics

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In this work, gold nanoparticles have been synthesized using second harmonic generation ND-YAG laser ablation in Ethanol employing 532 nm and 1.064 nm wavelengths. Field emission scanning electron microscope (FESEM), Transmission electron microscopy (TEM)X-Ray diffraction (XRD), Atomic force microscopy (AFM), photoluminescence (PL) spectroscopy, and UV-Vis absorption were employed to examine the structural, chemical and optical properties of Au NPs. XRD results showed that all synthesized Au nanoparticles are crystalline in nature. the optical band gap upon ablation using the higher wavelength (1064 nm) was about (4.02 eV). While the value of the optical bandgap increases to reach a value of (4.22 eV) at the shorter wavelength (532 nm The FESEM results reveal the formation of smaller nano rode size at second-harmonic generation (SHG) wavelength was found to be about (30 nm at wavelength 532 nm and 44 nm at 1064nm). After that, Finite Element Analysis is used to simulate the photonic crystal fiber (PCF) as biosensors, depending on the surface Plasmon resonance (SPR) phenome-non using COMSOL Multiphasic program. The hollow core-photonic crystal fiber (HC-PCF) HC-800 was thus overfilled with (water). The confinement loss (CL) of the fundamental mode for the proposed PCF with and without the gold nanoparticles was calculated, we observe without gold NPs the CL at the water and Colon tissue about (1.08E+03, 5.46E+02) dB/m, while at use the deposited PCF with gold NPs the results ensured the decrease more than in the confinement loss at the water and Colon tissue about (1.01E+03, 3.16E+02) dB/m with a clear shift toward higher wavelengths, also when calculating the sensitivity, to increase HC-PCF bio-sensor performance by using wavelength interrogation and amplitude measurements, it found the bio-liquid (colon tissue) has the best electric field using the gold NWs layer in the biosensor equal to 68.8 V/m by comparison when without using the gold NWs layer which leads to high sensitivity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gold Nanowires Based on Photonic Crystal Fiber by Laser Ablation in Liquid to Improve Colon Biosensor

Fakhri¹,

Salim²,

Sulaiman³

et al. 2023

Plasmonics

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“…Zinc oxide (ZnO) is a one-of-a-kind semiconducting material with unusual nanoscale characteristics [15,16]. Top layer acoustic wave devices, UV nano-lasers, gas sensors, biosensors, sunscreen lotion, nano-generators, and medical devices are all examples of key uses [17][18][19]. Metal ion-doped ZnO thin films and nano-powders have also been extensively investigated due to their potential utility as conductive or reflective films, as well as biological and chemical sensors.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Gold Nanoparticles Doped Zinc Oxide Using Reactive Pulsed Laser Ablation in Liquid

Hassan

Fakhri

Abdulwahhab

et al. 2022

KEM

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The effect of using an Nd: YAG laser tattoo removal (nanosecond pulses) to ablate pure gold targets to obtain gold nanorods and pure zinc targets to obtain zinc oxide nanoparticles was investigated separately in ethanol using an Nd: YAG laser tattoo removal (nanosecond pulses) and then mixing the resulting mixtures to obtain gold dopant with zinc oxide in this manuscript. Pure gold Nanorods, ZnO nanoparticles, and Au doped ZnO nanoparticles were characterized using transmission electron microscopy (TEM), X-Ray Diffraction (XRD), and optical properties. The qualities of the manufactured gold Nano highways were disclosed using XRD and TEM. According to the findings, gold Nanorods created by the 532 nm laser have outstanding optical, structural, and morphological features and can be used in a variety of sensors.

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Section: Introductionmentioning

confidence: 99%

Synthesis of gold nanowires using laser ablation for improved colon biosensor

Fakhri

Ali²,

Salim³

et al. 2022

Preprint

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Gold nanowires (Au NWs) were prepared using 9 nsec ND-YAG laser ablation in Ethanol employing 532 nm and 1.064 nm wavelengths. The colloidal solution was investigated depending on the X-ray diffraction (XRD) technique, the photoluminescence (PL) spectra, and Ultraviolet-Visible (UV-VIS) spectroscopy. The FESEM results reveal the formation of smaller Nano rode size at Second-harmonic generation (SHG) wavelength where found to be about (30 nm at wavelength 532 nm and 0.44 μm at 1064nm). Using Finite Element Analysis the simulation of photonic crystal fiber (PCF) as biosensors were done, depended on surface plasmon resonance (SPR) phenomenon using COMSOL Multiphysics program. The hollow core-photonic crystal fiber (HC-PCF) HC-800 was thus overfilled with (water). The confinement loss (CL) of the fundamental mode for the proposed PCF with and without the gold nanoparticles was calculated, we observe without gold NPs the CL at the water and Colon tissue about (1.08E+03, 5.46E+02) dB/m, while at use the deposited PCF with gold NPs the results ensured the decrease more than in the confinement loss at the water and Colon tissue about (1.01E+03, 3.16E+02) dB/m with a clear shift toward higher wavelengths.

show abstract

Gold nanoparticles in ethanol deposited on PCF for refractive index sensors

Cited by 14 publications

References 38 publications

Gold Nanowires Based on Photonic Crystal Fiber by Laser Ablation in Liquid to Improve Colon Biosensor

Gold Nanowires Based on Photonic Crystal Fiber by Laser Ablation in Liquid to Improve Colon Biosensor

Preparation of Gold Nanoparticles Doped Zinc Oxide Using Reactive Pulsed Laser Ablation in Liquid

Synthesis of gold nanowires using laser ablation for improved colon biosensor

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