Efficient Energy Transfer between Confined Dye and Y-Zeolite Functionalized Au Nanoparticles

Sen, Tuhinadri; Jana, Sourav Kanti; Koner, Subratanath; Patra, Amitava

doi:10.1021/jp108262f

Cited by 25 publications

(41 citation statements)

References 31 publications

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“…16 Incorporation of fluorophore molecules inside a host matrix enhances the photostability and enhances the energy‐transfer process from self‐organized donor molecules to acceptor molecules 17. 18 Recently, attention has been focused on donor–acceptor fluorophores incorporated in nanochannels (mesoporous silica and zeolite) for light‐harvesting systems 19–23. Unidirectional nonradiative energy migration is found to occur24 because of the ordered arrangement and restricted rotation of the trapped fluorophore molecules inside the nanochannels.…”

Section: Introductionmentioning

confidence: 99%

Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

2015

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We designed a self-assembled multichromophoric organic molecular arrangement inside polymer nanoparticles for light-harvesting antenna materials. The self-assembled molecular arrangement of quaterthiophene molecules was found to be an efficient light-absorbing antenna material, followed by energy transfer to Nile red (NR) dye molecules, which was confined in polymer nanoparticles. The efficiency of the antenna effect was found to be 3.2 and the effective molar extinction coefficient of acceptor dye molecules was found to be enhanced, which indicates an efficient light-harvesting system. Based on this energy-transfer process, tunable photo emission and white light emission has been generated with 14 % quantum yield. Such self-assembled oligothiophene-NR systems encapsulated in polymer nanoparticles may open up new possibilities for fabrication of artificial light harvesting system.

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Section: Introductionmentioning

confidence: 99%

Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

2015

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“…In addition, it is well-known that a small amount of the 14 nm gold nanoparticles can bind lots of thiol groups (thiol/gold nanoparticle = 4000) via stronger AuAS bonds [32,33].…”

Section: Transformation Of Tga From Cdte Qd To Fsn-capped Gold Nanopamentioning

confidence: 99%

Ligand exchange on the surface of cadmium telluride quantum dots with fluorosurfactant-capped gold nanoparticles: Synthesis, characterization and toxicity evaluation

Wang¹,

Zhang²,

Lu³

et al. 2014

Journal of Colloid and Interface Science

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a b s t r a c tCdTe quantum dots (QDs) can provide high-intensity and photostable luminescent signals when they are used as labeling materials for sensing trace amounts of bioanalytes. However, a major concern is whether the capping ligands of CdTe QDs cause toxic effects in living systems. In the current study, we address this problem through the complete ligand transformation of CdTe QDs from toxic thiolglycolic acid (TGA) to green citrate, which is attributed to the CdAS bond breaking and the AuAS bond formation. The highly efficient depletion of S atom from the surface of the CdTe QDs occurs after the addition of fluorosurfactant (FSN)-capped gold nanoparticles into TGA-capped CdTe QDs, accompanying with the rapid aggregation of FSN-capped gold nanoparticles via noncrosslinking mechanism in the presence of high salt. After the ligand transformation, negligible differences are observed on both photoluminescence spectra and luminescent quantum yield. In addition, the cytotoxicity of the original and new-born CdTe QDs is detected by measuring cell viability after the nanoparticle treatment. In comparison with the original TGA-capped QDs, the new-born CdTe QDs can induce minimal cytotoxicity against human hepatocellular liver carcinoma (HepG2) cells even at high dosages. Our study indicates that the extremely simple method herein opens up novel pathways for the synthesis of green CdTe QDs, and the as-prepared citrate-capped CdTe QDs might have great potential for biological labeling and imaging applications.

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“…This renders the catalytic processes even more efficient. In addition, nanomaterial confinement produces different effects on the catalytic response displayed by the materials laid on the supporting surface [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Study of Methylene Blue Degradation by Gold Nanoparticles Synthesized within Natural Zeolites

Rodr¹,

Le²,

Rodr

et al. 2016

Journal of Nanomaterials

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We carried out thein situsynthesis of gold nanoparticles inside a natural clinoptilolite-type zeolite matrix, using ascorbic acid as reducing agent. The microstructure of both zeolite and zeolite-gold nanocomposite was characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Scanning Transmission Electron Microscopy (STEM), and Energy-Dispersive X-ray Spectroscopy (EDS) techniques. Size distribution as assessed by STEM indicated that 60% of gold nanoparticles measured less than 2.5 nm. Determination of the surface area by the BET method revealed a specific value of 27.35 m2/g. The catalytic activity of zeolite-gold regarding methylene blue degradation under different light-exposing conditions was evaluated by UV-Vis spectroscopy. The results indicated that 50% degradation was achieved in only 11 min in presence of sunlight. This reaction was faster in comparison with those obtained using a white LED light. A notable aspect of this study is that catalysis was carried out without the addition of any strong reducing agents, such as sodium borohydride (NaBH4).

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Efficient Energy Transfer between Confined Dye and Y-Zeolite Functionalized Au Nanoparticles

Cited by 25 publications

References 31 publications

Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

Ligand exchange on the surface of cadmium telluride quantum dots with fluorosurfactant-capped gold nanoparticles: Synthesis, characterization and toxicity evaluation

Study of Methylene Blue Degradation by Gold Nanoparticles Synthesized within Natural Zeolites

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