Enhancement and quenching of photoluminescence from silicon quantum dots by silver nanoparticles in a totally integrated configuration

Benami, Abdellah; López-Suárez, A.; Rodrı́guez-Fernández, L.; Crespo-Sosa, A.; Cheang-Wong, J.C.; Reyes‐Esqueda, Jorge‐Alejandro; Oliver, A.

doi:10.1063/1.3701696

Cited by 11 publications

(11 citation statements)

References 41 publications

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“…While the direct use of sun light for photocatalytic bacterial disinfection might be attractive for low cost water treatment, the use of fluorescent light is more relevant for actual household applications to supply potable water. Antibacterial properties of WS 2 and rGO‐WS 2 nanosheet has also been investigated without using any light source . Luminescence activity has also been shown for WS 2 and MoS 2 with Ag nanoparticles based composite …”

Section: Introductionmentioning

confidence: 99%

“…Antibacterial properties of WS 2 [16] and rGO-WS 2 nanosheet has also been investigated without using any light source. [17] Luminescence activity has also been shown for WS 2 and MoS 2 with Ag nanoparticles based composite. [18][19][20] On the same context, several other composites have been explored with Ag nanoparticle to get high photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Water Disinfection of CVD Grown WS₂ Monolayer Decorated with Ag Nanoparticles

et al. 2018

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Two dimensional nanostructures of transition metal dichalcogenides like WS2 have been drawing much attention for biological applications owing to their intrinsic chemical and optical properties with tunable band gap. We have evaluated photocatalytic properties of chemical vapor deposited (CVD) grown WS2 monolayer with a direct band gap of 1.94 eV to disinfect water from Gram‐negative E.coli bacteria under fluorescence light by colony counting method. WS2 monolayer decorated with 10‐15 nm silver nanoparticles is found to enhance the antibacterial activity in comparison with individual components significantly. We have achieved up to 96% of bacterial growth inhibition by increasing the areal coverage of WS2 (upto 42%) coated with Ag nanoparticles in 3 hours, under fluorescent light. Moreover, direct correlation between the water disinfection ability and geometrical surface areal coverage of the monolayer WS2 on SiO2/Si substrate has been established to emphasize on the need of uniform CVD growth of WS2 monolayers over large scale for practical application like rapid and efficient cleaning technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic Water Disinfection of CVD Grown WS₂ Monolayer Decorated with Ag Nanoparticles

et al. 2018

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“…Several works reported the enhancement of PL based on the silica or silicon materials. [ 140–146 ] Different physical mechanisms have been proposed including near‐field intensity enhancement and the coupling of PL emitter and LSPR absorption. In addition, SERS effect can also be achieved by the enhanced near‐field intensity distribution.…”

Section: Tailoring Of Optical Properties Of Dielectrics By Nanoparticlesmentioning

confidence: 99%

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Pang

et al. 2020

Advanced Optical Materials

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The zero‐dimensional metallic nanoparticles (NPs) have attracted tremendous attention in various areas owing to the collective oscillation of electron gas that couples with electromagnetic field, known as localized surface plasmon resonance (LSPR). In practical applications, the tailoring of LSPR effect is of significant importance for promising photonic devices with designed nanocomposite systems and enhanced optical properties. Ion beam technology has been demonstrated to be an efficient method to fabricate NPs embedded in dielectrics for LSPR tailoring and material modification. By manipulating the parameters of ion beams, the shape, size, and structure of NPs can be well controlled, which enables the dielectrics to possess novel linear and nonlinear optical properties. In this review, the latest research progress on the ion beam synthesis of various NPs is systematically summarized. The tailoring of linear and nonlinear optical properties of dielectrics by NPs is discussed in detail. Selected applications are presented to indicate the development of the plasmonic NPs in dielectric systems for photonic applications.

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“…In other posterior works, authors have reported enhanced luminescence from SiQDs implanted in quartz and coupled to Ag island arrays fabricated by electron beam lithography or by subsequent implantation. Those enhancements are reported at emission frequencies that correspond to the collective dipole plasmon resonances [ 15 , 16 , 17 , 18 ]. In this regard, we recently reported photoluminescence (PL) enhancement from thin films of SiQDs embedded in silicon nitride coupled to a monolayer of Au nanoparticles which are separated by a nanometric dielectric silicon nitride thin film [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electroluminescence from Silicon Quantum Dots Embedded in Silicon Nitride Thin Films Coupled with Gold Nanoparticles in Light Emitting Devices

2018

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Nowadays, the use of plasmonic metal layers to improve the photonic emission characteristics of several semiconductor quantum dots is a booming tool. In this work, we report the use of silicon quantum dots (SiQDs) embedded in a silicon nitride thin film coupled with an ultra-thin gold film (AuNPs) to fabricate light emitting devices. We used the remote plasma enhanced chemical vapor deposition technique (RPECVD) in order to grow two types of silicon nitride thin films. One with an almost stoichiometric composition, acting as non-radiative spacer; the other one, with a silicon excess in its chemical composition, which causes the formation of silicon quantum dots imbibed in the silicon nitride thin film. The ultra-thin gold film was deposited by the direct current (DC)-sputtering technique, and an aluminum doped zinc oxide thin film (AZO) which was deposited by means of ultrasonic spray pyrolysis, plays the role of the ohmic metal-like electrode. We found that there is a maximum electroluminescence (EL) enhancement when the appropriate AuNPs-spacer-SiQDs configuration is used. This EL is achieved at a moderate turn-on voltage of 11 V, and the EL enhancement is around four times bigger than the photoluminescence (PL) enhancement of the same AuNPs-spacer-SiQDs configuration. From our experimental results, we surmise that EL enhancement may indeed be due to a plasmonic coupling. This kind of silicon-based LEDs has the potential for technology transfer.

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Enhancement and quenching of photoluminescence from silicon quantum dots by silver nanoparticles in a totally integrated configuration

Cited by 11 publications

References 41 publications

Photocatalytic Water Disinfection of CVD Grown WS₂ Monolayer Decorated with Ag Nanoparticles

Photocatalytic Water Disinfection of CVD Grown WS₂ Monolayer Decorated with Ag Nanoparticles

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Enhanced Electroluminescence from Silicon Quantum Dots Embedded in Silicon Nitride Thin Films Coupled with Gold Nanoparticles in Light Emitting Devices

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Enhancement and quenching of photoluminescence from silicon quantum dots by silver nanoparticles in a totally integrated configuration

Cited by 11 publications

References 41 publications

Photocatalytic Water Disinfection of CVD Grown WS2 Monolayer Decorated with Ag Nanoparticles

Photocatalytic Water Disinfection of CVD Grown WS2 Monolayer Decorated with Ag Nanoparticles

Plasmonic Nanoparticles in Dielectrics Synthesized by Ion Beams: Optical Properties and Photonic Applications

Enhanced Electroluminescence from Silicon Quantum Dots Embedded in Silicon Nitride Thin Films Coupled with Gold Nanoparticles in Light Emitting Devices

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Photocatalytic Water Disinfection of CVD Grown WS₂ Monolayer Decorated with Ag Nanoparticles

Photocatalytic Water Disinfection of CVD Grown WS₂ Monolayer Decorated with Ag Nanoparticles