Optical absorption and photoluminescence studies of gold nanoparticles deposited on porous silicon

Amran, Tengku Sarah Tengku; Hashim, Abdul Manaf; Al-Obaidi, Nihad K. Ali; Yazid, Hanani; Adnan, Rohana

doi:10.1186/1556-276x-8-35

Cited by 37 publications

(8 citation statements)

References 21 publications

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“…A similar finding was observed by Chowdhury et al [33]. Therefore, the average crystallite size was calculated via the Scherrer equation [19,20] (Eq. 4) using the full width at half maximum (FWHM) of the (111) peak.…”

Section: Resultssupporting

confidence: 74%

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Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

Razak

Cheong

et al. 2015

J Mater Sci: Mater Electron

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Gold nanoparticles (AuNPs) were grown on a Si(100) substrate using a sacrificial hydrothermal method on Al template prepared by direct current (DC) sputtering, followed by thermal annealing. The effect of annealing temperature on the Al template was investigated. The morphology and phases of the grown AuNPs were observed by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD), respectively. FESEM and XRD results revealed the uniform face-centered cubic structure of AuNPs with isolated 83 nm particle size and 1.48 9 10 13 m -2 area density; these properties were considered optimum for AuNPs formed on the nonannealed sputtered Al template. The electrical properties of AuNPs embedded in polymethylsilsesquioxane (PMSSQ) as an organic dielectric layer were studied using a semiconductor characterization system. A metal-insulatorsemiconductor device with embedded AuNPs was proven to exhibit memory effects. Optimum memory properties of AuNPs embedded in PMSSQ were obtained for AuNPs grown on the non-annealed sputtered Al template with the lowest threshold voltage of 2.4 V in I-V characteristics and 34 electrons stored per AuNP in C-V measurement.

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Section: Resultssupporting

confidence: 74%

“…However, the Si intensity for sample which was annealed at 300°C decreased slightly,that could be due to the centrifugal effect of spin coating PMSSQ layer. The average crystallite size was calculated using the Scherrer equation [19,20] (Eq. 1) using the full width at half maximum (FWHM) of the Al orientation.…”

Section: Resultsmentioning

confidence: 99%

Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

Razak

Cheong

et al. 2015

J Mater Sci: Mater Electron

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“…In the literature, there are some reports regarding fluorescence of the Au NPs solutions or for Au NPs deposited on different substrates, but we did not find any reference for the emission characteristics of Au NPs embedded into a polymer matrix. It seems that the surface oscillation of free electrons of Au NPs caused a local electric field, and when an incident beam hits the surface of the materials with such NPs appears the phenomena of photoluminescence emission coming from the surface plasmon excitation and locally enhancing of electromagnetic field near Au NPs . The fluorescence spectra of our films with Au NPs (F1÷F3 + Au) were measured with an excitation wavelength of 535 nm, and are displayed in Figure (b).…”

Section: Resultsmentioning

confidence: 81%

Obtaining of hybrid nanocomposites by simultaneous photopolymerization of some urethane monomers and photoinduced formation of gold nanoparticles

Chibac¹,

Melinte²,

Buruiană³

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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Urethane–urea dimethacrylates were synthesized and used in the preparation of nanocomposites containing gold nanoparticles (Au NPs) in situ photogenerated during the UV‐curing process in the absence of reducing agent. A study of the photopolymerization kinetics showed that the photoreactivity of the monomers alone or in combination with a dual urethane benzophenone (BP) macromer is dependent on the nature of photoinitiator (Irgacure819, BP/amine) and the formulation composition. It was found that the addition of 1 wt % AuBr3 in monomers slightly improved the polymerization rate and the degree of conversion. The formation of Au NPs into the network was confirmed through UV–vis, XRD, EDX, SAXS, and TEM analyses, the last indicating the existence of NPs with size around 8.5 nm and spherical/triangle shapes. On addition of 10 wt % 2[N‐methacryloyloxyethyl‐(N'‐2‐thioethyl)] (urea) in formulation, the Au NPs (200 nm) became predominantly cubic/hexagonal in shape. The composite films emit fluorescence at 575 nm, and this property could be exploited in the field of fluorescent bio/sensors. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 728–738

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“…Кроме того, на практике активно ведутся поиски создания композиционных материалов на основе PSi, содержащие наночастицы благородных металлов: Au [12], Pt [13] и Ag [14]. Задачей данного направления, в частности, является повышение эффективности проявления оптических свойств PSi.…”

Section: Introductionunclassified

Микроскопия Поверхности Кремния, Имплантированного Ионами Серебра Высокими Дозами

Воробьев¹,

Рогов²,

Осин³

et al. 2019

Журнал Технической Физики

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Low-energy ( E = 30 keV) Ag^+ ions have been implanted into single-crystalline Si wafers (c-Si) with an implantation dose varying from 1.25 × 10^15 to 1.5 × 10^17 ions cm^–2 and an ion beam current density varying from 2 to 15 μA/cm^2. The surface morphology of implanted wafers has been examined using scanning electron microscopy, transmission electron microscopy, and atomic force microscopy, and their structure has been studied by means of reflection high-energy electron diffraction and elemental microanalysis. It has been shown that for minimal irradiation doses used in experiments, the surface layer of c-Si experiences amorphization. It has been found that when the implantation dose is in excess of the threshold value (~3.1 × 10^15 ions cm^–2), Ag nanoparticles uniformly distributed over the Si surface arise in the irradiated Si layer. At a dose exceeding 10^17 ions cm^–2, a porous Si structure is observed. In this case, the Ag nanoparticle size distribution becomes bimodal with coarse particles localized at the walls of Si pores.

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Optical absorption and photoluminescence studies of gold nanoparticles deposited on porous silicon

Cited by 37 publications

References 21 publications

Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

Obtaining of hybrid nanocomposites by simultaneous photopolymerization of some urethane monomers and photoinduced formation of gold nanoparticles

Микроскопия Поверхности Кремния, Имплантированного Ионами Серебра Высокими Дозами

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