InP/ZnS–graphene oxide and reduced graphene oxide nanocomposites as fascinating materials for potential optoelectronic applications

Samal, Monica; Mohapatra, Priyaranjan; Subbiah, Ramesh; Lee, Chang‐Lyoul; Benayad, Anass; Kim, Jang Ah; Kim, Taesung; Yi, Dong Kee

doi:10.1039/c3nr02333h

Cited by 27 publications

(22 citation statements)

References 79 publications

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“…The scale of this effect, both in terms of the number of these localized spots as well as their intensity, depends on the rGO concentration. Emission quenching by rGO, which is a signature of efficient energy transfer, was previously reported for several different emitters [5,7,10,11,[17][18][19][20][21][22][23]. More interesting is the appearance of the localized highintensity spots across the sample surface, as evidenced by fluorescence imaging of PCP/rGO composites.…”

Section: Resultsmentioning

confidence: 86%

“…Indeed, both GO and rGO materials can quench fluorescence of dyes or biomolecules [4][5][6]17,18,22,23], quantum dots [7,11] and conjugated polymers [19][20][21]. This property renders such hybrid materials as promising structures for biosensing or imaging [4,6,17].…”

Section: Introductionmentioning

confidence: 99%

“…As shown recently, both GO and rGO can quench the fluorescence of emitters placed in their vicinity with the resonance energy transfer being considered as the most probable source for this effect [4][5][6][7]11,[17][18][19][20][21]. Indeed, both GO and rGO materials can quench fluorescence of dyes or biomolecules [4][5][6]17,18,22,23], quantum dots [7,11] and conjugated polymers [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, in the case of non-emitting acceptors, the energy is dissipated non-radiatively, predominantly as heat. Such a scenario appears in hybrid nanostructures that involve metallic nanoparticles [3] or carbon-based materials [4][5][6][7]. Following the first reports on obtaining graphene [8,9], a two-dimensional honeycomb carbon lattice known for its unique optoelectronic, thermal, and mechanical properties, several groups have applied this material as an acceptor in studying fluorescence of emitters placed in its vicinity [10][11][12][13].…”

mentioning

confidence: 99%

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Fluorescence imaging of hybrid nanostructures composed of natural photosynthetic complexes and reduced graphene oxide

Twardowska¹,

Chomicki²,

Kamińska³

et al. 2015

Nanospectroscopy

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rates, this technique in its many facets provides insight into various processes such as energy transfer, electron transfer, excited state reactions, molecular rearrangements, plasmonic interactions, and complex formation [1]. These are undoubtedly the key effects determining the properties of materials at the nanoscale, which can lead to changes in fluorescence intensity. While enhancement of fluorescence intensity can be most frequently induced by coupling fluorophores with metallic nanoparticles [2], either through absorption or fluorescence rate increase, fluorescence quenching is often the result of energy transfer to neighbouring acceptors. If these acceptors can emit fluorescence, the energy transfer leads to an increase of acceptor fluorescence intensity [1]; its fluorescence dynamics can also be affected. Alternatively, in the case of non-emitting acceptors, the energy is dissipated non-radiatively, predominantly as heat. Such a scenario appears in hybrid nanostructures that involve metallic nanoparticles [3] or carbon-based materials [4][5][6][7]. Following the first reports on obtaining graphene [8,9], a two-dimensional honeycomb carbon lattice known for its unique optoelectronic, thermal, and mechanical properties, several groups have applied this material as an acceptor in studying fluorescence of emitters placed in its vicinity [10][11][12][13]. The results indicate that incorporating graphene in such structures provides unexplored opportunities in devising novel architectures possibly applicable in photonics, optoelectronics, and biosensing [12][13][14][15].In addition to graphene, other carbon-based compounds, namely graphene oxide (GO) and reduced graphene oxide (rGO), have been suggested as components of functional hybrid nanostructures. At first, they were considered disadvantageous, described often as distorted forms of highly crystalline graphene. Nevertheless, easy processing, solubility in various solvents, e.g. water, and the presence of oxygen containing functional groups [16], mean both GO and rGO are attractive materials for coupling them with other nanostructures. Particularly Abstract: Herein, we describe the results of fluorescence microscopy imaging of peridinin-chlorophyll-protein (PCP) photosynthetic complex mixed with reduced graphene oxide (rGO). Upon incorporation of rGO the fluorescence image of PCP changes substantially from one characterized by uniform intensity towards a more complex pattern. The isolated bright spots feature up to ten times higher emission intensity compared to the fluorescence of PCP in the reference sample, where no rGO was added. The number of the bright spots increases with increasing rGO concentration. At the same time the fluorescence intensity away from the bright spots in the PCP/rGO hybrid system is quenched in comparison to the PCP -only reference.

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Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Fluorescence imaging of hybrid nanostructures composed of natural photosynthetic complexes and reduced graphene oxide

Twardowska¹,

Chomicki²,

Kamińska³

et al. 2015

Nanospectroscopy

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“…Indium phosphide (core)-zinc sulfide (shell) InP@ZnS core–shell nanocomposites exhibit a very large stock shift, which leads to the appearance of near-infrared region fluorescent emission. With high quality, low toxicity and bright luminescence, InP@ZnS QDs have been used in diagnostic near-infrared imaging for the early detection of cancer [15, 16]. Herein, we report the physicochemical characteristics and bioapplications of novel hybrid nanocomposites of graphene oxide and InP@ZnS QDs that are bound to biomolecules (P-gp antibody) for multimodal targeting and treatment of drug-resistant cancer.…”

Section: Introductionmentioning

confidence: 99%

Targeted imaging and induction of apoptosis of drug-resistant hepatoma cells by miR-122-loaded graphene-InP nanocompounds

et al. 2017

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BackgroundCurrently, graphene oxide has attracted growing attention as a drug delivery system due to its unique characteristics. Furthermore, utilization of microRNAs as biomarkers and therapeutic strategies would be particularly attractive because of their biological mechanisms and relatively low toxicity. Therefore, we have developed functionalized nanocompounds consisted of graphene oxide, quantum dots and microRNA, which induced cancer cells apoptosis along with targeted imaging.ResultsIn the present study, we synthesized a kind of graphene-P-gp loaded with miR-122-InP@ZnS quantum dots nanocomposites (GPMQNs) that, in the presence of glutathione, provides controlled release of miR-122. The miR-122 actively targeted liver tumor cells and induced their apoptosis, including drug-resistant liver tumor cells. We also explored the near-infrared fluorescence and potential utility for targeting imaging of InP@ZnS quantum dots. To further understand the molecular mechanism of GPMQNs-induced apoptosis of drug-resistant HepG2/ADM hepatoma cells, the relevant apoptosis proteins and signal pathways were explored in vitro and in vivo. Furthermore, near-infrared GPMQNs, which exhibited reduced photon scattering and auto-fluorescence, were applied for tumor imaging in vivo to allow for deep tissue penetration and three-dimensional imaging.ConclusionIn conclusion, techniques using GPMQNs could provide a novel targeted treatment for liver cancer, which possessed properties of targeted imaging, low toxicity, and controlled release.Electronic supplementary materialThe online version of this article (doi:10.1186/s12951-016-0237-2) contains supplementary material, which is available to authorized users.

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InP/ZnS quantum dots synthesis and photovoltaic application

et al. 2022

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In the present paper hybrid core–shell InP/ZnS quantum dots were prepared by the one pot synthesis method which does not require additional component injections and which complies more with cost requirements. The synthesized quantum dots were characterized by X-ray diffraction and optical spectroscopy methods. The applicability of the synthesized InP/ZnS core–shell particles in inverted solar cells fabricated with a step-by-step procedure which combines thermal vacuum deposition and spin-coating techniques was investigated. The resulting efficiency of the fabricated inverted solar cell is comparable to that of quantum-dot sensitized TiO2 based solar cells. Therefore, hybrid core–shell InP/ZnS particles can be considered as multifunctional light-harvesting materials useful for implementation in different types of photovoltaic devices, such as quantum dot sensitized solar cells and inverted solar cells.

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InP/ZnS–graphene oxide and reduced graphene oxide nanocomposites as fascinating materials for potential optoelectronic applications

Cited by 27 publications

References 79 publications

Fluorescence imaging of hybrid nanostructures composed of natural photosynthetic complexes and reduced graphene oxide

Fluorescence imaging of hybrid nanostructures composed of natural photosynthetic complexes and reduced graphene oxide

Targeted imaging and induction of apoptosis of drug-resistant hepatoma cells by miR-122-loaded graphene-InP nanocompounds

InP/ZnS quantum dots synthesis and photovoltaic application

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