Assemblies of semiconductor quantum dots and light-harvesting-complex II

Erker, Wolfgang; Boggasch, Stephanie; Xie, Rui-Hua; Grundmann, Götz; Paulsen, Harald; Basché, Thomas

doi:10.1016/j.jlumin.2009.12.002

Cited by 10 publications

(8 citation statements)

References 26 publications

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“…As shown previously with type-I QDs, LHCII binds to QDs via electrostatic interaction between a cluster of positive charges in the N-terminal protein domain and the negatively charged DHLA coat of the QDs. The LHCII version wt-h carries a His 6 tag engineered into the protein’s C terminus, which also promotes binding, presumably by interaction with Zn 2+ ions exposed at the surface of the particles.…”

Section: Resultsmentioning

confidence: 58%

“…A His 6 tag presumably binds to exposed Zn 2+ ions of the ZnS coating, and a cluster of positive charges in the N-terminal domain of the protein electrostatically interacts with the DHLA ligands. The same LHCII protein version was used in our previous study, 36 except that in the present work trimeric LHCII was used throughout. The three monomers within an LHCII trimer are arranged in parallel to each other; therefore, all three N termini of the apoproteins are located on one side of the trimeric complex, whereas the C termini point to the opposite surface.…”

mentioning

confidence: 99%

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Bio Serves Nano: Biological Light-Harvesting Complex as Energy Donor for Semiconductor Quantum Dots

Werwie

Haase

et al. 2012

Langmuir

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Light-harvesting complex (LHCII) of the photosynthetic apparatus in plants is attached to type-II core-shell CdTe/CdSe/ZnS nanocrystals (quantum dots, QD) exhibiting an absorption band at 710 nm and carrying a dihydrolipoic acid coating for water solubility. LHCII stays functional upon binding to the QD surface and enhances the light utilization of the QDs significantly, similar to its light-harvesting function in photosynthesis. Electronic excitation energy transfer of about 50% efficiency is shown by donor (LHCII) fluorescence quenching as well as sensitized acceptor (QD) emission and corroborated by time-resolved fluorescence measurements. The energy transfer efficiency is commensurable with the expected efficiency calculated according to Förster theory on the basis of the estimated donor-acceptor separation. Light harvesting is particularly efficient in the red spectral domain where QD absorption is relatively low. Excitation over the entire visible spectrum is further improved by complementing the biological pigments in LHCII with a dye attached to the apoprotein; the dye has been chosen to absorb in the "green gap" of the LHCII absorption spectrum and transfers its excitation energy ultimately to QD. This is the first report of a biological light-harvesting complex serving an inorganic semiconductor nanocrystal. Due to the charge separation between the core and the shell in type-II QDs the presented LHCII-QD hybrid complexes are potentially interesting for sensitized charge-transfer and photovoltaic applications.

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Section: Resultsmentioning

confidence: 58%

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confidence: 99%

Bio Serves Nano: Biological Light-Harvesting Complex as Energy Donor for Semiconductor Quantum Dots

Werwie

Haase

et al. 2012

Langmuir

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“…When QDs efficiently transfer energy to the photosynthetic reaction centers of bacteria, nanomaterials become powerful tools that improve the photosynthetic efficiencies of algae or higher plants 44 and become useful in the field of photovoltaic as artificial photosynthetic systems. 45 Growth Development. When treated with low concentrations of CdSe QDs, germination of rice seeds was limited and further growth was completely inhibited.…”

Section: Journal Of Agricultural and Food Chemistrymentioning

confidence: 99%

“…In this regard, what happens when an energy donor switches with a receptor? When QDs efficiently transfer energy to the photosynthetic reaction centers of bacteria, nanomaterials become powerful tools that improve the photosynthetic efficiencies of algae or higher plants and become useful in the field of photovoltaic as artificial photosynthetic systems …”

Section: Effect Of Qds On Plantsmentioning

confidence: 99%

Current Status and Future Prospects of Semiconductor Quantum Dots in Botany

Pang

Gong

2019

J. Agric. Food Chem.

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The development of botanical applications of nanomaterials has produced a new generation of technologies that can profoundly impact botanical research. Semiconductor quantum dots (QDs) are an archetype nanomaterial and have received significant interest from diverse research communities, owing to their unique and optimizable optical properties. In this review, we describe the most recent progress on QD-based botanical research and discuss the uptake, translocation, and effects of QDs on plants and the potential applications of QDs in botany. A critical evaluation of the current limitations of QD technologies is discussed, along with the future prospects in QD-based botanical research.

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“…QDs are excellent energy donors in the fluorescence resonance energy transfer (FRET) system. Erker and Yang connected QDs to the LHC II, respectively. It was found that QDs could transmit partial excitation energy to LHC II through resonance energy transfer, promote the efficiency of light energy utilization of LHC II, and improved the capacity for energy transfer with the increased molar ratio of hybrid complex QDs to LHC II, but the mechanism and influence on energy transfer between semiconductor QDs and LHC were still undefined.…”

mentioning

confidence: 99%