Energy Transfer and Confined Motion of Dyes Trapped in Semiconducting Conjugated Polymer Nanoparticles

Bhattacharyya, Santanu; Paramanik, Bipattaran; Patra, Amitava

doi:10.1021/jp204111u

Cited by 41 publications

(82 citation statements)

References 49 publications

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“…The shortening of the monomolecular decay time (420 to 372 ps) is due to the increase in microviscosity and polarizability inside the polymer NPs 11. 35 The slower decay component is assigned to the H‐aggregated state of QTH molecules inside the polymer NPs 43. 46 The aggregation formation inside polymer NPs was enhanced as the relative concentration of QTH was increased.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 7A shows the anisotropic decay curves of QTH in THF and encapsulated in PMMA NPs in the absence of NR dye. Here, we assumed that the rotational diffusion time of PMMA polymer NPs does not affect the faster rotational motion of encapsulated oligothiophene molecules 35. For pure QTH in THF, a very fast anisotropic decay with average reorientation time of approximately 69 ps was observed.…”

Section: Resultsmentioning

confidence: 99%

“…McNeill et al have demonstrated diffusion‐enhanced host–guest energy‐transfer phenomena in fluorophore‐encapsulating conjugated polymer nanoparticles in aqueous medium 27. Furthermore, the photophysics and rotational motions of encapsulated dye molecules inside the semiconducting polymer nanoparticles have been discussed 35. The influence of particle size and the concentration of dye inside the particles on the photophysical properties has been investigated by using steady‐state, time‐resolved fluorescence spectroscopy, and fluorescence correlation spectroscopy (FCS) 36.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

2015

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“…[30][31][32] First, 300 mL of 1 mg mL À1 P3HT in THF, 150 mL of 1 mg mL À1 hexadecylamine (HDA) in THF and 150 mL of THF were mixed under an inert atmosphere and the mixed solution was ultrasonicated to get a completely homogeneous solution. [30][31][32] First, 300 mL of 1 mg mL À1 P3HT in THF, 150 mL of 1 mg mL À1 hexadecylamine (HDA) in THF and 150 mL of THF were mixed under an inert atmosphere and the mixed solution was ultrasonicated to get a completely homogeneous solution.…”

Section: Methodsmentioning

confidence: 99%

Conjugated polymer P3HT–Au hybrid nanostructures for enhancing photocatalytic activity

Jana

Bhattacharyya

Patra

2015

Phys. Chem. Chem. Phys.

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Metal-semiconductor nanostructures have been the subject of great interest, mainly due to their interesting optical properties and their potential applications in light harvesting, photocatalysis and photovoltaic devices. Here, we have designed raspberry type organic-inorganic hybrid nanostructures of the poly-3-hexylthiophene (P3HT)-Au nanoparticle (NP) composite by a simple solution based synthetic method. The electronic interaction of semiconducting P3HT polymer nanoparticles with Au nanoparticles exhibits a bathochromic shift of absorption bands and significant photoluminescence quenching of P3HT nanoparticles in this organic-inorganic hybrid system. The photocatalytic activity of this raspberry type hybrid nanostructure is demonstrated under the visible light irradiation and the degradation efficiency is found to be 90.6%. Such organic-inorganic hybrid nanostructures made of a semiconducting polymer and plasmonic nanoparticles could pave the way for designing new optical based materials for applications in photocatalytic and light harvesting systems.

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“…Host–guest donor–acceptor systems, consisting of polymer/dye blends or of different conjugated polymers, might exploit nonradiative energy transfer processes to reduce self‐absorption and other sources of optical losses. For instance, Coumarin 153 (C153, Figure b) in poly( N ‐vinylcarbazole) (PVK) nanoparticles show higher yield upon increasing the particle size, quenching of the luminescence spectrum and shortening of the PVK host decay time, suggesting an energy transfer from PVK to C153 . In another study, F8BT is found to show a significantly reduced ASE threshold depending on the blending ratio with other copolymers, such as the Dow Red F .…”

Section: Methodsmentioning

confidence: 98%

Laser Systems and Networks with Organic Nanowires and Nanofibers

Matino

Persano

Camposeo

et al. 2019

Advanced Optical Materials

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The potentialities of miniaturized laser sources are still far from being fully developed. Unprecedented opportunities are generated in this field by organic nanowires and nanofibers, which can be used as building blocks of micro‐ and nanolasers in which they combine optical gain, waveguiding, and very high versatility to create nanophotonic networks. The progress in laser devices and network architectures based on optically pumped organic light‐emitting nanowires and nanofibers is here presented, with emphasis on developed active materials, fabrication technologies, lasing mechanisms, and cavity geometries, and on achieved device performance in terms of spectral tunability, excitation threshold, and resonator quality factors. Recent examples of optical coupling of different miniaturized lasers, of their application in optical sensing, and of network lasers are presented. Future directions for research are also outlined, which include the exploration of new classes of active organic or hybrid materials within nanowires, the more in‐depth characterization of the fundamental properties of these lasers, and the use of topologically defined organic nanophotonics in network science, computing, and diagnostics.

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Energy Transfer and Confined Motion of Dyes Trapped in Semiconducting Conjugated Polymer Nanoparticles

Cited by 41 publications

References 49 publications

Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

Multichromophoric Organic Molecules Encapsulated in Polymer Nanoparticles for Artificial Light Harvesting

Conjugated polymer P3HT–Au hybrid nanostructures for enhancing photocatalytic activity

Laser Systems and Networks with Organic Nanowires and Nanofibers

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