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Demers SME, Kuhne WW, Swindle AR, Dick DD, Coopersmith KJ. Quantum Dot-DNA FRET Conjugates for Direct Analysis of Methylphosphonic Acid in Complex Media. ACS OMEGA 2023; 8:23017-23023. [PMID: 37396263 PMCID: PMC10308513 DOI: 10.1021/acsomega.3c02173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/22/2023] [Indexed: 07/04/2023]
Abstract
Rapid detection of nerve agents from complex matrices with minimal sample preparation is essential due to their high toxicity and bioavailability. In this work, quantum dots (QDs) were functionalized with oligonucleotide aptamers that specifically targeted a nerve agent metabolite, methylphosphonic acid (MePA). These QD-DNA bioconjugates were covalently linked to quencher molecules to form Förster resonance energy transfer (FRET) donor-acceptor pairs that quantitatively measure the presence of MePA. Using the FRET biosensor, the MePA limit of detection was 743 nM in artificial urine. A decrease in the QD lifetime was measured upon DNA binding and was recovered with MePA. The biosensor's flexible design makes it a strong candidate for the rapid detection of chemical and biological agents for deployable, in-field detectors.
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Biswas S, Das AK, Sardar A, Manna SS, Mondal PK, Polentarutti M, Pathak B, Mandal S. Luminescent [CO 2@Ag 20(SAdm) 10(CF 3COO) 10(DMA) 2] nanocluster: synthetic strategy and its implication towards white light emission. NANOSCALE 2023; 15:8377-8386. [PMID: 37092574 DOI: 10.1039/d3nr01107k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Owing to the quantized size and associated discrete energy levels, atomically precise silver nanoclusters (Ag NCs) hold great potential for designing functional luminescent materials. However, the thermally activated non-radiative transition of Ag(I)-based NCs has faded the opportunities. To acquire the structurally rigid architecture of cluster nodes for constraining such transitions, a new synthetic approach is unveiled here that utilizes a neutral template as a cluster-directing agent to assemble twenty Ag(I) atoms that ensure the maximum number of surface-protecting ligand attachment possibilities in a particular solvent medium. The solvent polarity triggers the precise structural design to circumvent the over-reliance of the templates, which results in the formation of [CO2@Ag20(SAdm)10(CF3COO)10(DMA)2] NC (where SAdm = 1-adamantanethiolate and DMA = N,N-dimethylacetamide) exhibiting an unprecedented room-temperature photoluminescence emission. The high quantum yield of the generated blue emission ensures its candidature as an ideal donor for artificial light-harvesting system design, and it is utilized with the two-step sequential energy transfer process, which finally results in the generation of ideal white light. For implementing perfect white light emission, the required chromophores in the green and red emission regions were chosen based on their effective spectral overlap with the donor components. Due to their favorable energy-level distribution, excited state energy transfers occurred from the NC to β-carotene at the initial step, then from the conjugate of the NC and β-carotene to another chromophore, Nile Blue, at the second step via a sequential Förster resonance energy transfer pathway.
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Affiliation(s)
- Sourav Biswas
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695551, India.
| | - Anish Kumar Das
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695551, India.
| | - Avirup Sardar
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695551, India.
| | - Surya Sekhar Manna
- Department of Chemistry, Indian Institute of Technology Indore, Madhya Pradesh 453552, India
| | - Pradip Kumar Mondal
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, Trieste 34149, Italy
| | - Maurizio Polentarutti
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, Trieste 34149, Italy
| | - Biswarup Pathak
- Department of Chemistry, Indian Institute of Technology Indore, Madhya Pradesh 453552, India
| | - Sukhendu Mandal
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695551, India.
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3
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Rotem R, Giustra M, Arrigoni F, Bertolini JA, Garbujo S, Rizzuto MA, Salvioni L, Barbieri L, Bertini L, De Gioia L, Colombo M, Prosperi D. Conjugation of gold nanoparticles with multidentate surfactants for enhanced stability and biological properties. J Mater Chem B 2022; 11:61-71. [PMID: 36373865 DOI: 10.1039/d2tb01528e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This work originated from the need to functionalize surfactant-coated inorganic nanoparticles for biomedical applications, a process that is limited by excess unbound surfactant. These limitations are connected to the bioconjugation of targeting molecules that are often in equilibrium between the free aliquot in solution and that which binds the surface of the nanoparticles. The excess in solution can play a role in the biocompatability in vitro and in vivo of the final nanoparticles stock. For this purpose, we tested the ability of common surfactants - monothiolated polyethylene glycol and amphiphilic polymers - to colloidally stabilize nanoparticles as excess surfactant is removed and compared them to newly appearing multidentate surfactants endowed with high avidity for inorganic nanoparticles. Our results showed that monothiolated polyethylene glycol or amphiphilic polymers have an insufficient affinity to the nanoparticles and as the excess surfactant is removed the colloidal stability is lost, while multidentate high-avidity surfactants excel in the same regard, possibly allowing improvement in an array of nanoparticle applications, especially in those stated.
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Affiliation(s)
- Rany Rotem
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Marco Giustra
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Federica Arrigoni
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Jessica A Bertolini
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Stefania Garbujo
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Maria A Rizzuto
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Lucia Salvioni
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Linda Barbieri
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Luca Bertini
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Luca De Gioia
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Miriam Colombo
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
| | - Davide Prosperi
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.
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Zhu J, Meng LN, Li X, Weng GJ, Li JJ, Zhao JW. Fluorescence quenching properties of Au-Ag-Pt tri-metallic nanorod: The application in specific detection of alpha-fetoprotein. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 282:121714. [PMID: 35940070 DOI: 10.1016/j.saa.2022.121714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/29/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
In this paper, the fluorescence quenching characteristics of Au-Ag-Pt core-shell nanorods have been studied.Due to nonradiative energy transformation, the fluorescence emission intensity of bovine serum albumin (BSA) could be greatly quenched.It has been found that the quenching effect of Au-Ag-Pt core-shell nanorods could be optimized by adjusting the concentration of chloroplatinic acid.Based on the fluorescence quenching properties of Au-Ag-Pt core-shell nanorods, Au-Ag-Pt trimetal fluorescence quenching nanoprobe has been prepared, and the specificity of alpha-fetoprotein (AFP) detection has also been realized.In order to guarantee the sensing specificity, the surface modification including carboxyl replacement, carboxyl activation and antibody connection have been performed on Au-Ag-Pt core-shell nanorods.By using the principle of specific combination of antigen and antibody, the specific detection of AFP has been realized with a lower detection limit of 4.0 pg/mL, and the linear detection range spans a scope from 0.03 to 0.5 ng/mL.Interference experiments and the actual samples detection results show that the Au-Ag-Pt trimetal core-shell nanorod probes have good anti-interference and repeatability.
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Affiliation(s)
- Jian Zhu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Li-Na Meng
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xin Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guo-Jun Weng
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian-Jun Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jun-Wu Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
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Das AK, Biswas S, Manna SS, Pathak B, Mandal S. Atomically Precise Silver Nanocluster for Artificial Light-Harvesting System Through Supramolecular Functionalization. Chem Sci 2022; 13:8355-8364. [PMID: 35919723 PMCID: PMC9297522 DOI: 10.1039/d2sc02786k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/20/2022] [Indexed: 11/21/2022] Open
Abstract
Designing an artificial light-harvesting system (LHS) with high energy transfer efficiency has been a challenging task. Herein, we report an atom-precise silver nanocluster (Ag NC) as a unique platform to fabricate the artificial LHS. A facile one-pot synthesis of [Cl@Ag16S(S-Adm)8(CF3COO)5(DMF)3(H2O)2]·DMF (Ag16) NC by using a bulky adamantanethiolate ligand is portrayed here which, in turn, alleviates the issues related to the smaller NC core designed from a highly steric environment. The surface molecular motion of this NC extends the non-radiative relaxation rate which is strategically restricted by a recognition site-specific supramolecular adduct with β-cyclodextrin (β-CD) that results in the generation of a blue emission. This emission property is further controlled by the number of attached β-CD which eventually imposes more rigidity. The higher emission quantum yield and the larger emission lifetime relative to the lesser numbered β-CD conjugation signify Ag16 ∩ β-CD2 as a good LHS donor component. In the presence of an organic dye (β-carotene) as an energy acceptor, an LHS is fabricated here via the Förster resonance energy transfer pathway. The opposite charges on the surfaces and the matched electronic energy distribution result in a 93% energy transfer efficiency with a great antenna effect from the UV-to-visible region. Finally, the harvested energy is utilized successfully for efficient photocurrent generation with much-enhanced yields compared to the individual components. This fundamental investigation into highly-efficient energy transfer through atom-precise NC-based systems will inspire additional opportunities for designing new LHSs in the near future. A β-cyclodextrin functionalized atomically precise Ag16 based artificial light-harvesting system is fabricated with 93% energy transfer efficiency from the blue to the green emission region of the acceptor β-carotene molecule.![]()
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Affiliation(s)
- Anish Kumar Das
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Kerala 69551 India
| | - Sourav Biswas
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Kerala 69551 India
| | - Surya Sekhar Manna
- Department of Chemistry, Indian Institute of Technology Indore Madhya Pradesh 453552 India
| | - Biswarup Pathak
- Department of Chemistry, Indian Institute of Technology Indore Madhya Pradesh 453552 India
| | - Sukhendu Mandal
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Kerala 69551 India
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6
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Nilsson ZN, Beck LM, Sambur JB. Ensemble-level energy transfer measurements can reveal the spatial distribution of defect sites in semiconductor nanocrystals. J Chem Phys 2021; 154:054704. [PMID: 33557543 DOI: 10.1063/5.0034775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Energy transfer measurements are widely used to measure the distance between donors and acceptors in heterogeneous environments. In nanocrystal (NC)-molecule donor-acceptor systems, NC defects can participate in electronic energy transfer (EnT) in a defect-mediated EnT process. Here, we explore whether ensemble-level spectroscopy measurements can quantify the distance between the donor defect sites in the NC and acceptor molecules. We studied defect-mediated EnT between ZnO NCs and Alexa Fluor 555 (A555) because EnT occurs via emissive NC defect sites, such as oxygen vacancies. We synthesized a size series of ZnO NCs and characterized their radii, concentration, photoluminescence (PL) lifetime, and defect PL quantum yield using a combination of transmission electron microscopy, elemental analysis, and time-resolved PL spectroscopy. The ZnO defect PL decay kinetics were analyzed using the stochastic binding (SB) and restricted geometry (RG) models. Both models assume the Förster point dipole approximation, but the RG model considers the geometry of the NC donor in the presence of multiple acceptors. The RG model revealed that the emissive defect sites are separated, on average, 0.5 nm from the A555 acceptor molecules. That is, the emissive defect sites are predominantly located at or near the surface of large NCs. The SB model revealed the average number of A555 molecules per NC and the equilibrium binding constant but did not provide meaningful information regarding the defect-acceptor distance. We conclude that ensemble-level EnT measurements can reveal the spatial distribution of defect sites in NCs without the need for interrogating the sample with a microscope.
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Affiliation(s)
- Zach N Nilsson
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
| | - Lacey M Beck
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
| | - Justin B Sambur
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
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7
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Sasson E, Pinhasi RVO, Margel S, Klipcan L. Engineering and use of proteinoid polymers and nanocapsules containing agrochemicals. Sci Rep 2020; 10:9171. [PMID: 32514082 PMCID: PMC7280236 DOI: 10.1038/s41598-020-66172-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 04/27/2020] [Indexed: 11/11/2022] Open
Abstract
To address global challenges such as population growth and climate change, introduction of new technologies and innovations in agriculture are paramount. Polymer-based formulations of agrochemicals have received much attention in recent years, and there is strong motivation to develop agrochemicals that are not harmful to the environment. Proteinoid polymers are produced by thermal step-growth polymerization of natural and unnatural amino acids. Under suitable gentle conditions, the proteinoid polymers may self-assemble to form nano-sized hollow proteinoid nanoparticles (NPs) of a relatively narrow size distribution. Agrochemical molecules may be encapsulated within these hollow proteinoid NPs, integrated in the crude proteinoid shell, or bound covalently/physically to the NP surface. In the present manuscript we prepared and characterized four model proteinoid polymers and NPs: P(KEf), P(KF), P(EWH-PLLA) and P(KWH-PLLA), where Ef denotes the unnatural herbicidal amino acid glufosinate. The NPs were fluorescently labeled and loaded with agrochemicals such as the plant hormone auxin. In addition, the NP surface was hydrophobized by covalent conjugation of dodecyl aldehyde via its surface primary amine groups. Following treatment of the plants with the different fluorescent-labeled NPs, fluorescent microscopic techniques enabled to localize the NPs and observe the accumulation in the plant's vascular system. Next, using genetically modified plants, which express fluorescent protein and are responsive to the level of auxin, we demonstrated the possibility to deliver encapsulated agrochemicals into cells. We also illustrated that the proteinoid NPs are non-toxic to human umbilical vein endothelial cells, and apart from P(KEf) also to lettuce plants.
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Affiliation(s)
- Elisheva Sasson
- The Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Ruth Van Oss Pinhasi
- Gilat Research Center, Agricultural Research Organization, Mobile Post Negev 2, Gilat, 8531100, Israel
| | - Shlomo Margel
- The Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel.
| | - Liron Klipcan
- Gilat Research Center, Agricultural Research Organization, Mobile Post Negev 2, Gilat, 8531100, Israel.
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8
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Bioluminescence-Based Energy Transfer Using Semiconductor Quantum Dots as Acceptors. SENSORS 2020; 20:s20102909. [PMID: 32455561 PMCID: PMC7284562 DOI: 10.3390/s20102909] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/11/2020] [Accepted: 05/15/2020] [Indexed: 12/17/2022]
Abstract
Bioluminescence resonance energy transfer (BRET) is the non-radiative transfer of energy from a bioluminescent protein donor to a fluorophore acceptor. It shares all the formalism of Förster resonance energy transfer (FRET) but differs in one key aspect: that the excited donor here is produced by biochemical means and not by an external illumination. Often the choice of BRET source is the bioluminescent protein Renilla luciferase, which catalyzes the oxidation of a substrate, typically coelenterazine, producing an oxidized product in its electronic excited state that, in turn, couples with a proximal fluorophore resulting in a fluorescence emission from the acceptor. The acceptors pertinent to this discussion are semiconductor quantum dots (QDs), which offer some unrivalled photophysical properties. Amongst other advantages, the QD's large Stokes shift is particularly advantageous as it allows easy and accurate deconstruction of acceptor signal, which is difficult to attain using organic dyes or fluorescent proteins. QD-BRET systems are gaining popularity in non-invasive bioimaging and as probes for biosensing as they don't require external optical illumination, which dramatically improves the signal-to-noise ratio by avoiding background auto-fluorescence. Despite the additional advantages such systems offer, there are challenges lying ahead that need to be addressed before they are utilized for translational types of research.
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Wang W, Kong Y, Jiang J, Tian X, Li S, Akshath US, Tiede C, Hondow N, Yu A, Guo Y, Zhou D. Photon induced quantum yield regeneration of cap-exchanged CdSe/CdS quantum rods for ratiometric biosensing and cellular imaging. NANOSCALE 2020; 12:8647-8655. [PMID: 32147673 DOI: 10.1039/c9nr08060k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Full water-dispersion of commercial hydrophobic CdSe/CdS core/shell quantum rods (QRs) was achieved by cap-exchange using a dihydrolipoic acid zwitterion ligand at a low ligand:QR molar ratio (LQMR) of 1000. However, this process almost completely quenched the QR fluorescence, greatly limiting its potential in downstream fluorescence based applications. Fortunately, we found that the QR fluorescence could be recovered by exposure to near ultra-violet to blue light radiation (e.g. 300-450 nm). These "reborn" QRs were found to be compact, bright, and stable, and were resistant to non-specific adsorption, which make them powerful fluorescent probes in broad biomedical applications. We demonstrated their potential in two model applications: first, the QRs were conjugated with His8-tagged small antibody mimetic proteins (also known as Affimers) for the sensitive detection of target proteins via a Förster resonance energy transfer (FRET) readout strategy and second, the QR surface was functionalized with biotins for targeted imaging of cancer cells.
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Affiliation(s)
- Weili Wang
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK.
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10
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Mbarek M, Garreau A, Massuyeau F, Alimi K, Wéry J, Faulques E, Duvail J. Template process for engineering the photoluminescence of PVK and PPV‐based nanowires. J Appl Polym Sci 2019. [DOI: 10.1002/app.48201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Mohamed Mbarek
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3 France
- Laboratoire de Recherche LR 18ES19, Synthèse asymétrique et ingénierie moléculaire de matériaux organiques pour l'électronique organique, Faculté des Sciences de MonastirUniversity of Monastir 5000 Monastir Tunisia
| | - Alexandre Garreau
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3 France
| | - Florian Massuyeau
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3 France
| | - Kamel Alimi
- Laboratoire de Recherche LR 18ES19, Synthèse asymétrique et ingénierie moléculaire de matériaux organiques pour l'électronique organique, Faculté des Sciences de MonastirUniversity of Monastir 5000 Monastir Tunisia
| | - Jany Wéry
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3 France
| | - Eric Faulques
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3 France
| | - Jean‐Luc Duvail
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3 France
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Rafipoor M, Koll R, Merkl JP, Fruhner LS, Weller H, Lange H. Resonant Energy Transfer can Trigger Multiexciton Recombination in Dense Quantum Dot Ensembles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1803798. [PMID: 30589206 DOI: 10.1002/smll.201803798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/23/2018] [Indexed: 06/09/2023]
Abstract
Core/shell quantum dots/quantum rods are nanocrystals with typical application scenarios as ensembles. Resonance energy transfer is a possible process between adjacent nanocrystals. Highly excited nanocrystals can also relax energy by multiexciton recombination, competing against the energy transfer. The two processes have different dependencies and can be convolved, resulting in collective properties different from the superposition of the individual nanocrystals. A platform to study the interplay of energy transfer and multiexciton recombination is presented. CdSe/CdS quantum dot/quantum rods encapsulated in amphiphilic micelles with an interparticle distance control by spacer ligands are used for time-resolved photoluminescence and transient absorption experiments. At exciton populations around one, the ensemble starts to be in a state where energy transfer can trigger multiexciton Auger recombination, altering the collective dynamics.
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Affiliation(s)
- Mona Rafipoor
- The Hamburg Centre for Ultrafast Imaging, 20146, Hamburg, Germany
- Institut für Physikalische Chemie, Universität Hamburg, 20146, Hamburg, Germany
| | - Rieke Koll
- Institut für Physikalische Chemie, Universität Hamburg, 20146, Hamburg, Germany
| | - Jan-Philip Merkl
- Institut für Physikalische Chemie, Universität Hamburg, 20146, Hamburg, Germany
| | - Lisa Sarah Fruhner
- Jülich Centre for Neutron Science (JCNS-1), Institute for Complex Systems (ICS-1), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
- Institute of Physical Chemistry, RWTH Aachen University, 52056, Aachen, Germany
| | - Horst Weller
- The Hamburg Centre for Ultrafast Imaging, 20146, Hamburg, Germany
- Institut für Physikalische Chemie, Universität Hamburg, 20146, Hamburg, Germany
| | - Holger Lange
- The Hamburg Centre for Ultrafast Imaging, 20146, Hamburg, Germany
- Institut für Physikalische Chemie, Universität Hamburg, 20146, Hamburg, Germany
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12
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Xu J, Tong X, Yu P, Wenya GE, McGrath T, Fong MJ, Wu J, Wang ZM. Ultrafast Dynamics of Charge Transfer and Photochemical Reactions in Solar Energy Conversion. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1800221. [PMID: 30581691 PMCID: PMC6299728 DOI: 10.1002/advs.201800221] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 08/05/2018] [Indexed: 05/31/2023]
Abstract
For decades, ultrafast time-resolved spectroscopy has found its way into an increasing number of applications. It has become a vital technique to investigate energy conversion processes and charge transfer dynamics in optoelectronic systems such as solar cells and solar-driven photocatalytic applications. The understanding of charge transfer and photochemical reactions can help optimize and improve the performance of relevant devices with solar energy conversion processes. Here, the fundamental principles of photochemical and photophysical processes in photoinduced reactions, in which the fundamental charge carrier dynamic processes include interfacial electron transfer, singlet excitons, triplet excitons, excitons fission, and recombination, are reviewed. Transient absorption (TA) spectroscopy techniques provide a good understanding of the energy/electron transfer processes. These processes, including excited state generation and interfacial energy/electron transfer, are dominate constituents of solar energy conversion applications, for example, dye-sensitized solar cells and photocatalysis. An outlook for intrinsic electron/energy transfer dynamics via TA spectroscopic characterization is provided, establishing a foundation for the rational design of solar energy conversion devices.
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Affiliation(s)
- Jing‐Yin Xu
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Xin Tong
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Peng Yu
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Gideon Evans Wenya
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Thomas McGrath
- Department of PhysicsLancaster UniversityLancasterLancashireLA14YWUK
| | | | - Jiang Wu
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
- Department of Electronic and Electrical EngineeringUniversity College LondonTorrington PlaceLondonWC1E7JEUK
| | - Zhiming M. Wang
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
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14
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Self-Assembly of Rod-Like Bionanoparticles at Interfaces and in Solution. Methods Mol Biol 2018. [PMID: 29869240 DOI: 10.1007/978-1-4939-7808-3_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Rod-like nanoparticles show unique self-assembly behavior benefiting from their anisotropic properties. As a classic example of a one-dimensional (1D) rod-like plant virus, tobacco mosaic virus (TMV) can either assemble in a head-to-tail manner to form 1D long fibers, or align parallel to form crystal-like structures at interfaces or in solution. Here, the self-assembly behaviors of TMV at oil-water or air-liquid interfaces are summarized. In addition, the self-assembly of TMV with polymers in solution is also discussed in this chapter.
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15
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Huang H, Dai B, Wang W, Lu C, Kou J, Ni Y, Wang L, Xu Z. Oriented Built-in Electric Field Introduced by Surface Gradient Diffusion Doping for Enhanced Photocatalytic H 2 Evolution in CdS Nanorods. NANO LETTERS 2017; 17:3803-3808. [PMID: 28540718 DOI: 10.1021/acs.nanolett.7b01147] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Element doping has been extensively attempted to develop visible-light-driven photocatalysts, which introduces impurity levels and enhances light absorption. However, the dopants can also become recombination centers for photogenerated electrons and holes. To address the recombination challenge, we report a gradient phosphorus-doped CdS (CdS-P) homojunction nanostructure, creating an oriented built-in electric-field for efficient extraction of carriers from inside to surface of the photocatalyst. The apparent quantum efficiency (AQY) based on the cocatalyst-free photocatalyst is up to 8.2% at 420 nm while the H2 evolution rate boosts to 194.3 μmol·h-1·mg-1, which is 58.3 times higher than that of pristine CdS. This concept of oriented built-in electric field introduced by surface gradient diffusion doping should provide a new approach to design other types of semiconductor photocatalysts for efficient solar-to-chemical conversion.
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Affiliation(s)
- Hengming Huang
- Nanomaterials Center, School of Chemical Engineering and Australia Institute for Bioengineering and Nanotechnology, University of Queensland , Brisbane, Queensland 4072, Australia
| | - Baoying Dai
- Nanomaterials Center, School of Chemical Engineering and Australia Institute for Bioengineering and Nanotechnology, University of Queensland , Brisbane, Queensland 4072, Australia
| | - Wei Wang
- School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology , Nanjing 210044, China
| | | | | | | | - Lianzhou Wang
- Nanomaterials Center, School of Chemical Engineering and Australia Institute for Bioengineering and Nanotechnology, University of Queensland , Brisbane, Queensland 4072, Australia
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16
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Albrecht W, Goris B, Bals S, Hutter EM, Vanmaekelbergh D, van Huis MA, van Blaaderen A. Morphological and chemical transformations of single silica-coated CdSe/CdS nanorods upon fs-laser excitation. NANOSCALE 2017; 9:4810-4818. [PMID: 28352861 DOI: 10.1039/c6nr09879g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Radiation-induced modifications of nanostructures are of fundamental interest and constitute a viable out-of-equilibrium approach to the development of novel nanomaterials. Herein, we investigated the structural transformation of silica-coated CdSe/CdS nanorods (NRs) under femtosecond (fs) illumination. By comparing the same nanorods before and after illumination with different fluences we found that the silica-shell did not only enhance the stability of the NRs but that the confinement of the NRs also led to novel morphological and chemical transformations. Whereas uncoated CdSe/CdS nanorods were found to sublimate under such excitations the silica-coated nanorods broke into fragments which deformed towards a more spherical shape. Furthermore, CdS decomposed which led to the formation of metallic Cd, confirmed by high-resolution electron microscopy and energy dispersive X-ray spectrometry (EDX), whereby an epitaxial interface with the remaining CdS lattice was formed. Under electron beam exposure similar transformations were found to take place which we followed in situ.
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Affiliation(s)
- Wiebke Albrecht
- Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
| | - Bart Goris
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Eline M Hutter
- Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
| | - Daniel Vanmaekelbergh
- Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
| | - Marijn A van Huis
- Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
| | - Alfons van Blaaderen
- Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
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17
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Haldar KK, Sen T. Shell thickness matters! Energy transfer and rectification study of Au/ZnO core/shell nanoparticles. J Colloid Interface Sci 2016; 484:263-269. [PMID: 27619386 DOI: 10.1016/j.jcis.2016.09.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/25/2016] [Accepted: 09/03/2016] [Indexed: 10/21/2022]
Abstract
In the present study we report the influence of shell thickness on fluorescence resonance energy transfer between Au/ZnO core-shell nanoparticles and Rhodamine 6G dye by steady-state and time-resolved spectroscopy and rectification behaviours. Au/ZnO core-shell nanoparticles with different shell thickness were synthesized in aqueous solution by chemically depositing zinc oxide on gold nanoparticles surface. A pronounced effect on the photoluminescence (PL) intensity and shortening of the decay time of the dye in presence of Au/ZnO core-shell nanoparticles is observed. The calculated energy transfer efficiencies from dye to Au/ZnO are 62.5%, 79.2%, 53.6% and 46.7% for 1.5nm, 3nm, 5nm and 8nm thickness of shell, respectively. Using FRET process, the calculated distances (r) are 117.8, 113.2Å 129.9Å and 136.7Å for 1.5nm, 3nm, 5nm and 8nm thick Au/ZnO core-shell nanoparticles, respectively. The distances (d) between the donor and acceptor are 71.0, 57.8, 76.2 and 81.6Å for 1.5nm, 3nm, 5nm and 8nm thick core-shell Au/ZnO nanoparticles, respectively, using the efficiency of surface energy transfer (SET). The current-voltage (I-V) curve of hybrid Au/ZnO clearly exhibits a rectifying nature and represents the n-type Schottky diode characteristics with a typical turn-on voltage of between 0.6 and 1.3V. It was found that the rectifying ratio increases from 20 to 90 with decreasing the thickness of the shell from 5nm to 3nm and with shell thickness of 8nm, electrical transport through the core-shell is similar to what is observed with pure ZnO samples nanoparticles. The results indicated that the Au/ZnO core-shell nanoparticles with an average shell thickness of 3nm exhibited the maximum energy transfer efficiencies (79.2%) and rectification (rectifying ratio 90).
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Affiliation(s)
- Krishna Kanta Haldar
- Centre for Chemical Science, School of Basic and Applied Science, Central University of Punjab, City Campus, Mansa Road, Bathinda 151001, Punjab, India.
| | - Tapasi Sen
- Institute of Nano Science & Technology, Mohali 160062, Punjab, India
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18
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Oh E, Huston AL, Shabaev A, Efros A, Currie M, Susumu K, Bussmann K, Goswami R, Fatemi FK, Medintz IL. Energy Transfer Sensitization of Luminescent Gold Nanoclusters: More than Just the Classical Förster Mechanism. Sci Rep 2016; 6:35538. [PMID: 27774984 PMCID: PMC5075882 DOI: 10.1038/srep35538] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/28/2016] [Indexed: 12/19/2022] Open
Abstract
Luminescent gold nanocrystals (AuNCs) are a recently-developed material with potential optic, electronic and biological applications. They also demonstrate energy transfer (ET) acceptor/sensitization properties which have been ascribed to Förster resonance energy transfer (FRET) and, to a lesser extent, nanosurface energy transfer (NSET). Here, we investigate AuNC acceptor interactions with three structurally/functionally-distinct donor classes including organic dyes, metal chelates and semiconductor quantum dots (QDs). Donor quenching was observed for every donor-acceptor pair although AuNC sensitization was only observed from metal-chelates and QDs. FRET theory dramatically underestimated the observed energy transfer while NSET-based damping models provided better fits but could not reproduce the experimental data. We consider additional factors including AuNC magnetic dipoles, density of excited-states, dephasing time, and enhanced intersystem crossing that can also influence ET. Cumulatively, data suggests that AuNC sensitization is not by classical FRET or NSET and we provide a simplified distance-independent ET model to fit such experimental data.
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Affiliation(s)
- Eunkeu Oh
- Optical Sciences Division Code 5600, U.S. Naval Research Laboratory, Washington, DC 20375, USA
- Sotera Defense Solutions, Inc. Columbia, MD 21046, USA
| | - Alan L. Huston
- Optical Sciences Division Code 5600, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Andrew Shabaev
- Center for Computational Material Science Code 6390, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Alexander Efros
- Center for Computational Material Science Code 6390, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Marc Currie
- Optical Sciences Division Code 5600, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Kimihiro Susumu
- Optical Sciences Division Code 5600, U.S. Naval Research Laboratory, Washington, DC 20375, USA
- Sotera Defense Solutions, Inc. Columbia, MD 21046, USA
| | - Konrad Bussmann
- Materials and Sensors Branch Code 6361, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Ramasis Goswami
- Multifunctional Materials Code 6351, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Fredrik K. Fatemi
- Optical Sciences Division Code 5600, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Igor L. Medintz
- Center for Bio/Molecular Science and Engineering Code 6900, U.S. Naval Research Laboratory, Washington, DC 20375, USA
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19
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Affiliation(s)
- Simanta Kundu
- Department
of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Amitava Patra
- Department
of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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20
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Achilleos DS, Hatton TA, Vamvakaki M. Photoreponsive Hybrid Nanoparticles with Inherent FRET Activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5981-5989. [PMID: 27222922 DOI: 10.1021/acs.langmuir.6b00875] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The photoactivated inherent fluorescence resonance energy transfer (FRET) properties of a hard-and-soft hybrid nanosystem comprising poly(1'-(2-methacryloxyethyl)-3',3'-dimethyl-6-nitrospiro-(2H-1-benzopyran-2,2'-indoline))-co-poly[2-(dimethylamino)ethyl methacrylate] (PSPMA-co-PDMAEMA) random copolymer brushes on silica nanoparticles are described. This unique FRET process is switched on by the simultaneous generation of isomer X and merocyanine (MC), which are bipolar in nature and comprise donor-acceptor dyads, from a single spiropyran (SP) chromophore upon UV irradiation. These X-MC species exhibit sufficient lifetimes to allow the read-out of the FRET process. The phenomenon is gradually switched off because of the thermal relaxation of the bipolar chromophores. This inherent property of the nanoemitters is employed in the development of biosensors of high specificity by monitoring variations in the FRET efficiency and lifetime of the hybrids in the presence of biological substances. More specifically, bovine serum albumin (BSA) augments the formation of MC species and retards the MC photobleaching process, leading to the enhancement of the FRET efficiency and lifetime, respectively. On the other hand, amino acid l-histidine further retards the MC thermal relaxation and prolongs the FRET process. We envisage that this platform opens new perspectives in the development of novel, optical nanosensors for applications in various fields including healthcare products and environmental monitoring.
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Affiliation(s)
- Demetra S Achilleos
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 711 10 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete , 710 03 Heraklion, Crete, Greece
| | - T Alan Hatton
- Department of Chemical Engineering, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Maria Vamvakaki
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 711 10 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete , 710 03 Heraklion, Crete, Greece
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21
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Qin J, Wen Z, Li S, Hao J, Chen W, Dong D, Deng J, Wang D, Xu B, Wu D, Wang K, Sun X. 63-2:Distinguished Paper: Large-scale Luminance Enhancement Film with Quantum Rods Aligned in Polymeric Nanofibers for High Efficiency Wide Color Gamut LED Display. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/sdtp.10815] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jing Qin
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Zuoliang Wen
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Shang Li
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Junjie Hao
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Wei Chen
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Di Dong
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Jian Deng
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Dan Wang
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Bing Xu
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Dan Wu
- School of Electrical and Electronic Engineering; Nanyang Technological University; 639798 Singapore Singapore
| | - Kai Wang
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
| | - Xiaowei Sun
- Department of Electrical & Electronic Engineering; South University of Science and Technology of China; 518055 Shenzhen China
- School of Electrical and Electronic Engineering; Nanyang Technological University; 639798 Singapore Singapore
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22
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Pelzer KM, Darling SB, Gray SK, Schaller RD. Exciton size and quantum transport in nanoplatelets. J Chem Phys 2016; 143:224106. [PMID: 26671357 DOI: 10.1063/1.4936407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Two-dimensional nanoplatelets (NPLs) are an exciting class of materials with promising optical and energy transport properties. The possibility of efficient energy transport between nanoplatelets raises questions regarding the nature of energy transfer in these thin, laterally extended systems. A challenge in understanding exciton transport is the uncertainty regarding the size of the exciton. Depending on the material and defects in the nanoplatelet, an exciton could plausibly extend over an entire plate or localize to a small region. The variation in possible exciton sizes raises the question how exciton size impacts the efficiency of transport between nanoplatelet structures. Here, we explore this issue using a quantum master equation approach. This method goes beyond the assumptions of Förster theory to allow for quantum mechanical effects that could increase energy transfer efficiency. The model is extremely flexible in describing different systems, allowing us to test the effect of varying the spatial extent of the exciton. We first discuss qualitative aspects of the relationship between exciton size and transport and then conduct simulations of exciton transport between NPLs for a range of exciton sizes and environmental conditions. Our results reveal that exciton size has a strong effect on energy transfer efficiency and suggest that manipulation of exciton size may be useful in designing NPLs for energy transport.
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Affiliation(s)
- Kenley M Pelzer
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, USA
| | - Seth B Darling
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, USA
| | - Stephen K Gray
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, USA
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, USA
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23
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Alam R, Karam LM, Doane TL, Coopersmith K, Fontaine DM, Branchini BR, Maye MM. Probing Bioluminescence Resonance Energy Transfer in Quantum Rod-Luciferase Nanoconjugates. ACS NANO 2016; 10:1969-77. [PMID: 26760436 DOI: 10.1021/acsnano.5b05966] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We describe the necessary design criteria to create highly efficient energy transfer conjugates containing luciferase enzymes derived from Photinus pyralis (Ppy) and semiconductor quantum rods (QRs) with rod-in-rod (r/r) microstructure. By fine-tuning the synthetic conditions, CdSe/CdS r/r-QRs were prepared with two different emission colors and three different aspect ratios (l/w) each. These were hybridized with blue, green, and red emitting Ppy, leading to a number of new BRET nanoconjugates. Measurements of the emission BRET ratio (BR) indicate that the resulting energy transfer is highly dependent on QR energy accepting properties, which include absorption, quantum yield, and optical anisotropy, as well as its morphological and topological properties, such as aspect ratio and defect concentration. The highest BR was found using r/r-QRs with lower l/w that were conjugated with red Ppy, which may be activating one of the anisotropic CdSe core energy levels. The role QR surface defects play on Ppy binding, and energy transfer was studied by growth of gold nanoparticles at the defects, which indicated that each QR set has different sites. The Ppy binding at those sites is suggested by the observed BRET red-shift as a function of Ppy-to-QR loading (L), where the lowest L results in highest efficiency and furthest shift.
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Affiliation(s)
- Rabeka Alam
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Liliana M Karam
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Tennyson L Doane
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Kaitlin Coopersmith
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Danielle M Fontaine
- Department of Chemistry, Connecticut College , New London, Connecticut 06320, United States
| | - Bruce R Branchini
- Department of Chemistry, Connecticut College , New London, Connecticut 06320, United States
| | - Mathew M Maye
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
- Syracuse Biomaterials Institute, Syracuse University , Syracuse, New York 13244, United States
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24
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Bokarev SI, Bokareva OS, Kühn O. A theoretical perspective on charge transfer in photocatalysis. The example of Ir-based systems. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.12.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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25
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Zhang J, Wang S, Gao N, Feng D, Wang L, Chen H. Luminescence energy transfer detection of PSA in red region based on Mn2+-enhanced NaYF4:Yb, Er upconversion nanorods. Biosens Bioelectron 2015; 72:282-7. [DOI: 10.1016/j.bios.2015.05.024] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 04/27/2015] [Accepted: 05/09/2015] [Indexed: 01/03/2023]
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26
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Timor R, Weitman H, Waiskopf N, Banin U, Ehrenberg B. PEG-Phospholipids Coated Quantum Rods as Amplifiers of the Photosensitization Process by FRET. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21107-21114. [PMID: 26334672 DOI: 10.1021/acsami.5b04318] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Singlet oxygen ((1)O2) generated upon photostimulation of photosensitizer molecules is a highly reactive specie which is utilized in photodynamic therapy. Recent studies have shown that semiconductor nanoparticles can be used as donors in fluorescence resonance energy transfer (FRET) process to excite attached photosensitizer molecules. In these studies, their unique properties, such as low nanoscale size, long-term photostability, wide broad absorbance band, large absorption cross section, and narrow and tunable emission bands were used to provide advantages over the traditional methods to produce singlet oxygen. Previous studies that achieved this goal, however, showed some limitations, such as low FRET efficiency, poor colloidal stability, nonspecific interactions, and/or complex preparation procedure. In this work, we developed and characterized a novel system of semiconductor quantum rods (QRs) and the photosensitizer meso-tetra(hydroxyphenyl) chlorin (mTHPC), as a model system that produces singlet oxygen without these limitations. A simple two-step preparation method is shown; Hydrophobic CdSe/CdS QRs are solubilized in aqueous solutions by encapsulation with lecithin and PEGylated phospholipid (PEG-PL) of two lipid lengths: PEG350 or PEG2000. Then, the hydrophobic photosensitizer mTHPC, was intercalated into the new amphiphilic PEG-PL coating of the QR, providing a strong attachment to the nanoparticle without covalent linkage. These PEGylated QR (eQR)-mTHPC nanocomposites show efficient FRET processes upon light stimulation of the QR component which results in efficient production of singlet oxygen. The results demonstrate the potential for future use of this concept in photodynamic therapy schemes.
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Affiliation(s)
- Reut Timor
- Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
| | - Hana Weitman
- Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
| | - Nir Waiskopf
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Uri Banin
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Benjamin Ehrenberg
- Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
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27
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Ray PC, Fan Z, Crouch RA, Sinha SS, Pramanik A. Nanoscopic optical rulers beyond the FRET distance limit: fundamentals and applications. Chem Soc Rev 2015; 43:6370-404. [PMID: 24902784 DOI: 10.1039/c3cs60476d] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In the last few decades, Förster resonance energy transfer (FRET) based spectroscopy rulers have served as a key tool for the understanding of chemical and biochemical processes, even at the single molecule level. Since the FRET process originates from dipole-dipole interactions, the length scale of a FRET ruler is limited to a maximum of 10 nm. Recently, scientists have reported a nanomaterial based long-range optical ruler, where one can overcome the FRET optical ruler distance dependence limit, and which can be very useful for monitoring biological processes that occur across a greater distance than the 10 nm scale. Advancement of nanoscopic long range optical rulers in the last ten years indicate that, in addition to their long-range capability, their brightness, long lifetime, lack of blinking, and chemical stability make nanoparticle based rulers a good choice for long range optical probes. The current review discusses the basic concepts and unique light-focusing properties of plasmonic nanoparticles which are useful in the development of long range one dimensional to three dimensional optical rulers. In addition, to provide the readers with an overview of the exciting opportunities within this field, this review discusses the applications of long range rulers for monitoring biological and chemical processes. At the end, we conclude by speculating on the role of long range optical rulers in future scientific research and discuss possible problems, outlooks and future needs in the use of optical rulers for technological applications.
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Affiliation(s)
- Paresh Chandra Ray
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS, USA.
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28
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Quantum chemical study of the electronic properties of an Iridium-based photosensitizer bound to medium-sized silver clusters. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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29
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Rowland CE, Fedin I, Zhang H, Gray SK, Govorov AO, Talapin DV, Schaller RD. Picosecond energy transfer and multiexciton transfer outpaces Auger recombination in binary CdSe nanoplatelet solids. NATURE MATERIALS 2015; 14:484-9. [PMID: 25774956 DOI: 10.1038/nmat4231] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 01/29/2015] [Indexed: 05/06/2023]
Abstract
Fluorescence resonance energy transfer (FRET) enables photosynthetic light harvesting, wavelength downconversion in light-emitting diodes (LEDs), and optical biosensing schemes. The rate and efficiency of this donor to acceptor transfer of excitation between chromophores dictates the utility of FRET and can unlock new device operation motifs including quantum-funnel solar cells, non-contact chromophore pumping from a proximal LED, and markedly reduced gain thresholds. However, the fastest reported FRET time constants involving spherical quantum dots (0.12-1 ns; refs 7-9) do not outpace biexciton Auger recombination (0.01-0.1 ns; ref. 10), which impedes multiexciton-driven applications including electrically pumped lasers and carrier-multiplication-enhanced photovoltaics. Few-monolayer-thick semiconductor nanoplatelets (NPLs) with tens-of-nanometre lateral dimensions exhibit intense optical transitions and hundreds-of-picosecond Auger recombination, but heretofore lack FRET characterizations. We examine binary CdSe NPL solids and show that interplate FRET (∼6-23 ps, presumably for co-facial arrangements) can occur 15-50 times faster than Auger recombination and demonstrate multiexcitonic FRET, making such materials ideal candidates for advanced technologies.
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Affiliation(s)
- Clare E Rowland
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
| | - Igor Fedin
- Department of Chemistry and James Franck Institute, University of Chicago, Chicago, Illinois 60637, USA
| | - Hui Zhang
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - Stephen K Gray
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Alexander O Govorov
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - Dmitri V Talapin
- 1] Department of Chemistry and James Franck Institute, University of Chicago, Chicago, Illinois 60637, USA [2] Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Richard D Schaller
- 1] Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA [2] Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
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30
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Terbium to quantum rod Förster resonance energy transfer for homogeneous bioassays with picomolar detection limits. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1500-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Doane TL, Alam R, Maye MM. Functionalization of quantum rods with oligonucleotides for programmable assembly with DNA origami. NANOSCALE 2015; 7:2883-2888. [PMID: 25611367 DOI: 10.1039/c4nr07662a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The DNA-mediated self-assembly of CdSe/CdS quantum rods (QRs) onto DNA origami is described. Two QR types with unique optical emission and high polarization were synthesized, and then functionalized with oligonucleotides (ssDNA) using a novel protection-deprotection approach, which harnessed ssDNA's tailorable rigidity and denaturation temperature to increase DNA coverage by reducing non-specific coordination and wrapping. The QR assembly was programmable, and occurred at two different assembly zones that had capture strands in parallel alignment. QRs with different optical properties were assembled, opening up future studies on orientation dependent QR FRET. The QR-origami conjugates could be purified via gel electrophoresis and sucrose gradient ultracentrifugation. Assembly yields, QR stoichiometry and orientation, as well as energy transfer implications were studied in light of QR distances, origami flexibility, and conditions.
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Affiliation(s)
- Tennyson L Doane
- Department of Chemistry, Syracuse University, Syracuse New York, 13244, USA.
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32
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Federspiel F, Froehlicher G, Nasilowski M, Pedetti S, Mahmood A, Doudin B, Park S, Lee JO, Halley D, Dubertret B, Gilliot P, Berciaud S. Distance dependence of the energy transfer rate from a single semiconductor nanostructure to graphene. NANO LETTERS 2015; 15:1252-8. [PMID: 25607231 DOI: 10.1021/nl5044192] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The near-field Coulomb interaction between a nanoemitter and a graphene monolayer results in strong Förster-type resonant energy transfer and subsequent fluorescence quenching. Here, we investigate the distance dependence of the energy transfer rate from individual, (i) zero-dimensional CdSe/CdS nanocrystals and (ii) two-dimensional CdSe/CdS/ZnS nanoplatelets to a graphene monolayer. For increasing distances d, the energy transfer rate from individual nanocrystals to graphene decays as 1/d(4). In contrast, the distance dependence of the energy transfer rate from a two-dimensional nanoplatelet to graphene deviates from a simple power law but is well described by a theoretical model, which considers a thermal distribution of free excitons in a two-dimensional quantum well. Our results show that accurate distance measurements can be performed at the single particle level using graphene-based molecular rulers and that energy transfer allows probing dimensionality effects at the nanoscale.
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Affiliation(s)
- François Federspiel
- Institut de Physique et Chimie des Matériaux de Strasbourg and NIE, UMR 7504, Université de Strasbourg and CNRS , 23 rue du Lœss, BP43, 67034 Strasbourg Cedex 2, France
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33
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Si HY, Wang LJ, Feng WJ, Zhang HL, Zhu H, Zhao JJ, Ding ZL, Li YT. Facilely controlling the Förster energy transfer efficiency of dendron encapsulated conjugated organic molecular wire–CdSe quantum dot nanostructures. NEW J CHEM 2015. [DOI: 10.1039/c4nj01888e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
On Den-OPE–CdSe nanostructures, as the size of the dendrimer increases, the energy transfer efficiency from Den-OPEs to CdSe QDs enhances.
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Affiliation(s)
- Hua-Yan Si
- School of Materials Science and Engineering
- Shijiazhuang Tiedao University
- Shijiazhuang 050043
- China
- Hebei Provincial Key Laboratory of Traffic Engineering materials
| | - Le-Jia Wang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- 730000 Lanzhou
- China
| | - Wen-Jie Feng
- Mechanics Engineering Department
- Shijiazhuang Tiedao University
- Shijiazhuang 050043
- China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- 730000 Lanzhou
- China
| | - Hao Zhu
- School of Materials Science and Engineering
- Shijiazhuang Tiedao University
- Shijiazhuang 050043
- China
| | - Jin-Jin Zhao
- School of Materials Science and Engineering
- Shijiazhuang Tiedao University
- Shijiazhuang 050043
- China
| | - Zhan-Lai Ding
- School of Materials Science and Engineering
- Shijiazhuang Tiedao University
- Shijiazhuang 050043
- China
| | - Yan-Ting Li
- School of Materials Science and Engineering
- Shijiazhuang Tiedao University
- Shijiazhuang 050043
- China
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34
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John J, Thomas L, George NA, Kurian A, George SD. Tailoring of optical properties of fluorescein using green synthesized gold nanoparticles. Phys Chem Chem Phys 2015; 17:15813-21. [DOI: 10.1039/c5cp02029h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The anisotropy in plasmonic field makes star shaped particles as an optical ruler that can probe larger distances as compared to spherical gold nanoparticles, for which dipoles are parallel to the surface act as more efficient quencher for fluorescein dye.
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Affiliation(s)
- Jisha John
- Photonics Lab
- Department of Physics
- Catholicate College
- Pathanamthitta
- India
| | - Lincy Thomas
- Photonics Lab
- Department of Physics
- Catholicate College
- Pathanamthitta
- India
| | | | - Achamma Kurian
- Photonics Lab
- Department of Physics
- Catholicate College
- Pathanamthitta
- India
| | - Sajan D. George
- Centre for Atomic and Molecular Physics
- Manipal University
- Manipal
- India
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35
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Rahimi Rashed A, De Luca A, Dhama R, Hosseinzadeh A, Infusino M, El Kabbash M, Ravaine S, Bartolino R, Strangi G. Battling absorptive losses by plasmon–exciton coupling in multimeric nanostructures. RSC Adv 2015. [DOI: 10.1039/c5ra09673a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study presents a novel approach dealing with absorptive losses in plasmonic metamaterials, capitalizing on field enhancement effect in multimeric nanostructures.
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Affiliation(s)
- Alireza Rahimi Rashed
- Department of Physics
- Case Western Reserve University
- Cleveland
- USA
- Department of Physics and CNR-NANOTEC
| | - Antonio De Luca
- Department of Physics and CNR-NANOTEC
- University of Calabria
- Rende
- Italy
| | - Rakesh Dhama
- Department of Physics and CNR-NANOTEC
- University of Calabria
- Rende
- Italy
| | - Arash Hosseinzadeh
- Department of Electrical and Computer Engineering
- Michigan Technological University
- Houghton
- USA
| | - Melissa Infusino
- Department of Physics
- Case Western Reserve University
- Cleveland
- USA
- Colegio de Ciencias e Ingeniería
| | | | - Serge Ravaine
- Centre de Recherche Paul Pascal (CNRS-UPR8641)
- 33600 Pessac
- France
| | - Roberto Bartolino
- Department of Physics and CNR-NANOTEC
- University of Calabria
- Rende
- Italy
- Centro Linceo Interdisciplinare B. Segre
| | - Giuseppe Strangi
- Department of Physics
- Case Western Reserve University
- Cleveland
- USA
- Department of Physics and CNR-NANOTEC
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36
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Li X, Nichols VM, Zhou D, Lim C, Pau GSH, Bardeen CJ, Tang ML. Observation of multiple, identical binding sites in the exchange of carboxylic acid ligands with CdS nanocrystals. NANO LETTERS 2014; 14:3382-3387. [PMID: 24810426 DOI: 10.1021/nl500885t] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We study ligand exchange between the carboxylic acid group and 5.0 nm oleic-acid capped CdS nanocrystals (NCs) using fluorescence resonance energy transfer (FRET). This is the first measurement of the initial binding events between cadmium chalcogenide NCs and carboxylic acid groups. The binding behavior can be described as an interaction between a ligand with single binding group and a substrate with multiple, identical binding sites. Assuming Poissonian binding statistics, our model fits both steady-state and time-resolved photoluminescence (SSPL and TRPL, respectively) data well. A modified Langmuir isotherm reveals that a CdS nanoparticle has an average of 3.0 new carboxylic acid ligands and binding constant, Ka, of 3.4 × 10(5) M(-1).
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Affiliation(s)
- Xin Li
- Department of Chemistry, University of California, Riverside , Riverside, California 92521, United States
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37
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Kochuveedu ST, Son T, Lee Y, Lee M, Kim D, Kim DH. Revolutionizing the FRET-based light emission in core-shell nanostructures via comprehensive activity of surface plasmons. Sci Rep 2014; 4:4735. [PMID: 24751860 PMCID: PMC3994441 DOI: 10.1038/srep04735] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 04/01/2014] [Indexed: 01/18/2023] Open
Abstract
We demonstrate the surface-plasmon-induced enhancement of Förster resonance energy transfer (FRET)using a model multilayer core-shell nanostructure consisting of an Au core and surrounding FRET pairs, i.e., CdSe quantum dot donors and S101 dye acceptors. The multilayer configuration was demonstrated to exhibit synergistic effects of surface plasmon energy transfer from the metal to the CdSe and plasmon-enhanced FRET from the quantum dots to the dye. With precise control over the distance between the components in the nanostructure, significant improvement in the emission of CdSe was achieved by combined resonance energy transfer and near-field enhancement by the metal, as well as subsequent improvement in the emission of dye induced by the enhanced emission of CdSe. Consequently, the Förster radius was increased to 7.92 nm and the FRET efficiency was improved to 86.57% in the tailored plasmonic FRET nanostructure compared to the conventional FRET system (22.46%) without plasmonic metals.
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Affiliation(s)
- Saji Thomas Kochuveedu
- Department of Chemistry and Nano Science, Global Top 5 Research Program, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea
| | - Taehwang Son
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea
| | - Youmin Lee
- Department of Chemistry and Nano Science, Global Top 5 Research Program, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea
| | - Minyung Lee
- Department of Chemistry and Nano Science, Global Top 5 Research Program, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea
| | - Donghyun Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea
| | - Dong Ha Kim
- Department of Chemistry and Nano Science, Global Top 5 Research Program, Division of Molecular and Life Sciences, College of Natural Sciences, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, Korea
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38
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Tafen DN, Long R, Prezhdo OV. Dimensionality of nanoscale TiO2 determines the mechanism of photoinduced electron injection from a CdSe nanoparticle. NANO LETTERS 2014; 14:1790-1796. [PMID: 24611556 DOI: 10.1021/nl404352a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Assumptions about electron transfer (ET) mechanisms guide design of catalytic, photovoltaic, and electronic systems. We demonstrate that the mechanism of ET from a CdSe quantum dot (QD) into nanoscale TiO2 depends on TiO2 dimensionality. The injection into a TiO2 QD is adiabatic due to strong donor-acceptor coupling, arising from unsaturated chemical bonds on the QD surface, and low density of acceptor states. In contrast, the injection into a TiO2 nanobelt (NB) is nonadiabatic, because the state density is high, the donor-acceptor coupling is weak, and multiple phonons accommodate changes in the electronic energy. The CdSe adsorbant breaks symmetry of delocalized TiO2 NB states, relaxing coupling selection rules, and generating more ET channels. Both mechanisms can give efficient ultrafast injection. However, the dependence on system properties is very different for the two mechanisms, demonstrating that the fundamental principles leading to efficient charge separation depend strongly on the type of nanoscale material.
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Affiliation(s)
- De Nyago Tafen
- National Energy Technology Laboratory, 1450 Queen Avenue SW, Albany, Oregon 97321, United States
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39
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40
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He T, Gao Y, Chen R, Ma L, Rajwar D, Wang Y, Grimsdale AC, Sun H. Multiphoton Harvesting in an Angular Carbazole-Containing Zn(II)-Coordinated Random Copolymer Mediated by Twisted Intramolecular Charge Transfer State. Macromolecules 2014. [DOI: 10.1021/ma402623z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Tingchao He
- Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Yang Gao
- School
of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Rui Chen
- Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Lin Ma
- Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Deepa Rajwar
- School
of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Yue Wang
- Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Andrew C. Grimsdale
- School
of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Handong Sun
- Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
- Centre
for Disruptive Photonic Technologies (CDPT), Nanyang Technological University, Singapore 637371, Singapore
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41
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Villafiorita-Monteoleone F, Daita V, Quarti C, Perdicchia D, Del Buttero P, Scavia G, Zoppo MD, Botta C. Light harvesting of CdSe/CdS quantum dots coated with β-cyclodextrin based host–guest species through resonant energy transfer from the guests. RSC Adv 2014. [DOI: 10.1039/c4ra03930k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Nano-hybrids based on red emitting QDs covered by β-cyclodextrin hosting a green emitting nitrobenzoxadiazole derivative show emission harvested by the host–guest organic system.
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Affiliation(s)
| | | | - Claudio Quarti
- Politecnico di Milano Dipartimento di Chimica
- Materiali e Ing. Chimica CMIC “G. Natta”
- Milano, Italy
| | | | | | - Guido Scavia
- Istituto per lo Studio delle Macromolecole
- CNR
- 20133 Milano, Italy
| | - Mirella del Zoppo
- Politecnico di Milano Dipartimento di Chimica
- Materiali e Ing. Chimica CMIC “G. Natta”
- Milano, Italy
| | - Chiara Botta
- Istituto per lo Studio delle Macromolecole
- CNR
- 20133 Milano, Italy
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42
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Wang T, Chirmanov V, Chiu WHM, Radovanovic PV. Generating tunable white light by resonance energy transfer in transparent dye-conjugated metal oxide nanocrystals. J Am Chem Soc 2013; 135:14520-3. [PMID: 24047053 DOI: 10.1021/ja407013z] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the design and properties of hybrid white-light-emitting nanophosphors obtained by electronic coupling of defect states in colloidal Ga2O3 nanocrystals emitting in blue-green with selected organic molecules emitting in orange-red. Coupling between the two components is enabled by the nanocrystal's size-dependent resonance energy transfer, allowing the photoluminescence chromaticity to be precisely tuned by changing the nanocrystal size and selecting the complementary organic dye molecule. Using this approach, we demonstrate the generation of pure white light with quantum yield of ~30%, color rendering index up to 95, and color temperature of 5500 K. These results provide a guideline for the design of a new class of hybrid white-light-emitting nanophosphors and other multifunctional nanostructures based on transparent metal oxides.
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Affiliation(s)
- Ting Wang
- Department of Chemistry, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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43
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Sadhu S, Patra A. A Brief Overview of Some Physical Studies on the Relaxation Dynamics and Förster Resonance Energy Transfer of Semiconductor Quantum Dots. Chemphyschem 2013; 14:2641-53. [DOI: 10.1002/cphc.201201059] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 05/28/2013] [Indexed: 01/24/2023]
Affiliation(s)
- Suparna Sadhu
- Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032 (India), Fax: (+91) 33‐2473‐2805
| | - Amitava Patra
- Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032 (India), Fax: (+91) 33‐2473‐2805
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44
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Alam R, Zylstra J, Fontaine DM, Branchini BR, Maye MM. Novel multistep BRET-FRET energy transfer using nanoconjugates of firefly proteins, quantum dots, and red fluorescent proteins. NANOSCALE 2013; 5:5303-6. [PMID: 23685756 DOI: 10.1039/c3nr01842c] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Sequential bioluminescence resonance energy transfer (BRET) and fluorescence resonance energy transfer (FRET) from firefly luciferase to red fluorescent proteins using quantum dot or rod acceptor/donor linkers is described. The effect of morphology and tuned optical properties on the efficiency of this unique BRET-FRET system was evaluated.
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Affiliation(s)
- Rabeka Alam
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, USA
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45
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Hoy J, Morrison PJ, Steinberg LK, Buhro WE, Loomis RA. Excitation Energy Dependence of the Photoluminescence Quantum Yields of Core and Core/Shell Quantum Dots. J Phys Chem Lett 2013; 4:2053-60. [PMID: 26283252 DOI: 10.1021/jz4004735] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The photoluminescence (PL) intensity of semiconductor quantum dots (QDs) is routinely monitored to track the chemical and physical properties within a sample or device incorporating the QDs. A dependence of the PL quantum yields (QYs) on the excitation energy could lead to erroneous conclusions but is commonly not considered. We summarize previous evidence and present results from two methodologies that confirm the possibility of a dependence of the PL QYs on the excitation energy. The data presented indicate that PL QYs of CdSe and CdSe/ZnS QDs suspended in toluene are highest for excitation just above the band gap, Eg, of each. The PL QYs decrease with increasing excitation energies up to 1 eV above Eg. The PL intensity decay profiles recorded for these samples at varying emission and excitation energies indicate that the changes in the PL QYs result from the nonradiative relaxation pathways sampled as the charge carriers relax down to the band edge.
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Affiliation(s)
- Jessica Hoy
- Department of Chemistry and Center for Materials Innovation, Washington University in Saint Louis, One Brookings Drive, CB 1134, Saint Louis, Missouri 63130, United States
| | - Paul J Morrison
- Department of Chemistry and Center for Materials Innovation, Washington University in Saint Louis, One Brookings Drive, CB 1134, Saint Louis, Missouri 63130, United States
| | - Lindsey K Steinberg
- Department of Chemistry and Center for Materials Innovation, Washington University in Saint Louis, One Brookings Drive, CB 1134, Saint Louis, Missouri 63130, United States
| | - William E Buhro
- Department of Chemistry and Center for Materials Innovation, Washington University in Saint Louis, One Brookings Drive, CB 1134, Saint Louis, Missouri 63130, United States
| | - Richard A Loomis
- Department of Chemistry and Center for Materials Innovation, Washington University in Saint Louis, One Brookings Drive, CB 1134, Saint Louis, Missouri 63130, United States
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46
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Garreau A, Massuyeau F, Cordier S, Molard Y, Gautron E, Bertoncini P, Faulques E, Wery J, Humbert B, Bulou A, Duvail JL. Color control in coaxial two-luminophore nanowires. ACS NANO 2013; 7:2977-2987. [PMID: 23477667 DOI: 10.1021/nn400763r] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report a general and simple approach to take control of the color of light-emitting two-luminophore hybrid nanowires (NWs). Our strategy is based on the spatial control at the nanoscale (coaxial geometry) and the spectral selection of the two kinds of luminophores in order to restrict complex charge and energy transfers. Thus, it is possible to control the color of the photoluminescence (PL) as an interpolation of the CIE (Commission Internationale de l'Eclairage) coordinates of each luminophore. For this purpose, we selected a green-emitting semiconducting polymer and a red-emitting hexanuclear metal cluster compound, (n-Bu4N)2Mo6Br8F6, dispersed in a poly(methyl-methacrylate) (PMMA) matrix. The great potential and the versatility of this strategy have been demonstrated for two configurations. First, a yellow PL with a continuous change along the nanowire has been evidenced when the proportion of the PPV shell versus the nanocomposite core, that is, the green/red volumic ratio, progressively shifts from 1:2 to 1:5. Second, an extremely abrupt change in the PL color with red-green-yellow segments has been achieved. A simple model corroborates the effectiveness of this strategy. PL excitation and time-resolved experiments also confirm that no significant charge and energy transfers are involved. The two-luminophore hybrid nanowires may find widespread nanophotonic applications in multicolor emitting sources, lasers and chemical and biological sensors.
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Affiliation(s)
- Alexandre Garreau
- Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS, France.
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47
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Huang YF, Ma KH, Kang KB, Zhao M, Zhang ZL, Liu YX, Wen T, Wang Q, Qiu WY, Qiu D. Core–shell plasmonic nanostructures to fine-tune long ``Au nanoparticle-fluorophore'' distance and radiative dynamics. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.12.050] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Huang YF, Zhang ZL, Kang KB, Zhao M, Wen T, Liu YX, Zhai XP, Lv SK, Wang Q, Qiu WY, Qiu D. Mitigation of metal-mediated losses by coating Au nanoparticles with dielectric layer in plasmonic solar cells. RSC Adv 2013. [DOI: 10.1039/c3ra43044h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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50
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Zadran S, Standley S, Wong K, Otiniano E, Amighi A, Baudry M. Fluorescence resonance energy transfer (FRET)-based biosensors: visualizing cellular dynamics and bioenergetics. Appl Microbiol Biotechnol 2012; 96:895-902. [PMID: 23053099 DOI: 10.1007/s00253-012-4449-6] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 09/17/2012] [Accepted: 09/17/2012] [Indexed: 10/27/2022]
Abstract
Förster (or fluorescence) resonance energy transfer (FRET) is a process involving the radiation-less transfer of energy from a "donor" fluorophore to an "acceptor" fluorophore. FRET technology enables the quantitative analysis of molecular dynamics in biophysics and in molecular biology, such as the monitoring of protein-protein interactions, protein-DNA interactions, and protein conformational changes. FRET-based biosensors have been utilized to monitor cellular dynamics not only in heterogeneous cellular populations, but also at the single-cell level in real time. Lately, applications of FRET-based biosensors range from basic biological to biomedical disciplines. Despite the diverse applications of FRET, FRET-based sensors still face many challenges. There is an increasing need for higher fluorescence resolution and improved specificity of FRET biosensors. Additionally, as more FRET-based technologies extend to medical diagnostics, the affordability of FRET reagents becomes a significant concern. Here, we will review current advances and limitations of FRET-based biosensor technology and discuss future FRET applications.
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Affiliation(s)
- Sohila Zadran
- David Geffen School of Medicine, University of California, Los Angeles, CA, USA.
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