Optoelectronic properties of highly porous silver oxide thin film

Al-Sarraj, Ahmad; Saoud, Khaled; Elmel, Abdelaziz; Mansour, Said; Haik, Yousef

doi:10.1007/s42452-020-04091-1

Cited by 53 publications

(33 citation statements)

References 56 publications

(66 reference statements)

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“…Al-Sarraj et al indicated the X-ray diffraction peaks of a silver-oxide film at 2θ = 32.3º and 37.3º, corresponding to Ag2O (111) and Ag2O (200). The AgO was at 2θ = 34.1º and the mixed-phase Ag/Ag2O formation was 2θ = 39.6º [44]. In our study, no significant intensities of AgO and Ag2O peaks shown in Figure 5(a) might indicate the high purity silver structure of the stored samples, as studied by Waterhouse et al [45].…”

Section: Xrd Of Agnp Structuressupporting

confidence: 47%

High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

Lin¹,

Hung²,

Tu³

et al. 2022

Preprint

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Surface-enhanced Raman spectroscopy (SERS) is commonly used for super-selective analysis through nanostructured silver layers in the environment, food quality, biomedicine, and materials science. To fabricate a high-sensitivity but more accessible device of SERS, dc magnetron sputtering technology was used to realize high sensitivity, low cost, stable deposition rate, and rapid mass production. This study investigated various thicknesses of a silver film ranging from 3.0 to 12.1 nm by field-emission-scanning-electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. In the rhodamine 6G (R6G) testing irradiated by a He-Ne laser beam, the analytical enhancement factor (AEF) of 9.35x108, the limit of detection (LOD) of 10-8 M, and the relative standard deviation (RSD) of 1.61% were better than other SERS substrates fabricated by the same dc sputtering process because the results show that the 6 nm thickness silver layer has the highest sensitivity, stability, and lifetime. The paraquat and acetylcholine analytes were further investigated and high sensitivity was also achievable. The proposed SERS samples were evaluated and stored in a low humidity environment for up to forty weeks, and no spectrum attenuation could be detected. Soon, the proposed technology to fabricate high sensitivity, repeatability, and robust SERS substrate will be an optimized process technology in multiple applications.

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Section: Xrd Of Agnp Structuressupporting

confidence: 47%

High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

Lin¹,

Hung²,

Tu³

et al. 2022

Preprint

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“…The XPS spectrum of Ag 3d was separated into two peaks at 367.8 and 373.8 eV corresponding to Ag 3d 5/2 and Ag 3d 3/2 , which were deconvoluted to AgO (367.8 and 373.8 eV) and AgO x (367.5 and 373.5 eV), respectively. [ 75,76 ] Note that the FWHM values of Ag 3d are determined to be 1.02 eV for AgO and 1.32 eV for AgO x . [ 77 ] The Au 4f XPS survey spectra exhibited two significant peaks at ≈83.5 and ≈87.4 eV corresponding to the Au 4f 7/2 and 4f 5/2 characteristic signals and 1.14 eV for FWHM value of Au peak, respectively.…”

Section: Resultsmentioning

confidence: 99%

Sensitive and Homogeneous Surface‐Enhanced Raman Scattering Detection Using Heterometallic Interfaces on Metal–Organic Framework‐Derived Structure

Lee

Shin

et al. 2022

Adv Materials Inter

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Here the use of heterometallic interfaces on metal–organic framework‐derived structures as surface‐enhanced Raman scattering (SERS)‐active substrates is investigated for sensitive and homogeneous SERS detection. Zeolitic imidazole framework‐67 (ZIF‐67) is grown on a conductive glass substrate via chemical bath deposition, followed by carbonization and oxidation to form ZIF‐67‐derived Co3O4 (ZIF‐67‐CO). For the sensitive and homogeneous SERS analysis, ZIF‐67‐CO is converted to the heterometallic interface Au–Ag@ZIF‐67‐derived Co3O4 (denoted as Au–Ag@ZIF‐67‐CO) via electrodeposition and successive chemical grafting. The optical properties of Au–Ag@ZIF‐67‐CO indicate a uniform and large‐scale distribution of both metals on the surface. Raman signals from the substrate are evenly enhanced based on the Raman intensity and shift mapping over a large area. Due to the multiple absorption bands of the Au–Ag@ZIF‐67‐CO substrate, signal enhancement can also be achieved with two different laser sources (532 and 785 nm) that are frequently used in SERS. As a result, concentration‐dependent and fingerprint SERS signals of small molecules such as 1,2‐bis‐(4‐pyridyl) ethylene, Nile blue A, and 1,1′‐diethyl‐2,2′‐cyanine iodide are obtained, and their signal enhancement factors are 104–105. Collectively, the use of heterometallic‐interfaced ZIF‐67‐CO will be a beneficial approach for collecting reproducible SERS signals of various target analytes.

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“…The peak at 532.38 eV may have been because of the presence of superoxide, leading to increased toxicity or, as per some studies, may reflect the presence of contamination [ 35 ], which in our case could have been an outcome of biological synthesis. The Ag 3d binding energy values observed in the sample were 374.08 eV and 366.1 eV corresponding to Ag and Ag (III) [ 36 ]. These observations confirmed the presence of mainly AgNPs and a small amount of Ag 4 O 4 (silver (I, III)) in this sample.…”

Section: Resultsmentioning

confidence: 99%

An In Vitro and In Vivo Study of the Efficacy and Toxicity of Plant-Extract-Derived Silver Nanoparticles

Desai

Singh

Edis

et al. 2022

JFB

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Silver nanoparticles (AgNPs) display unique plasmonic and antimicrobial properties, enabling them to be helpful in various industrial and consumer products. However, previous studies showed that the commercially acquired silver nanoparticles exhibit toxicity even in small doses. Hence, it was imperative to determine suitable synthesis techniques that are the most economical and least toxic to the environment and biological entities. Silver nanoparticles were synthesized using plant extracts and their physico-chemical properties were studied. A time-dependent in vitro study using HEK-293 cells and a dose-dependent in vivo study using a Drosophila model helped us to determine the correct synthesis routes. Through biological analyses, we found that silver nanoparticles’ cytotoxicity and wound-healing capacity depended on size, shape, and colloidal stability. Interestingly, we observed that out of all the synthesized AgNPs, the ones derived from the turmeric extract displayed excellent wound-healing capacity in the in vitro study. Furthermore, the same NPs exhibited the least toxic effects in an in vivo study of ingestion of these NPs enriched food in Drosophila, which showed no climbing disability in flies, even at a very high dose (250 mg/L) for 10 days. We propose that stabilizing agents played a superior role in establishing the bio-interaction of nanoparticles. Our study reported here verified that turmeric-extract-derived AgNPs displayed biocompatibility while exhibiting the least cytotoxicity.

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Optoelectronic properties of highly porous silver oxide thin film

Cited by 53 publications

References 56 publications

High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

Sensitive and Homogeneous Surface‐Enhanced Raman Scattering Detection Using Heterometallic Interfaces on Metal–Organic Framework‐Derived Structure

An In Vitro and In Vivo Study of the Efficacy and Toxicity of Plant-Extract-Derived Silver Nanoparticles

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