1
|
Budyka MF, Nikulin PA. Multiphotochromic Systems Based on Hybrid Organic–Inorganic Nanoparticles as “Super-Photochromes” for Photonic Molecular Logic Gates. HIGH ENERGY CHEMISTRY 2021. [DOI: 10.1134/s0018143921060035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
2
|
Ray A, Bhattacharya S, Banerjee S. Photophysical insights on quantum dots-zinc porphyrazine system studied in solution. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
3
|
Padgaonkar S, Eckdahl CT, Sowa JK, López-Arteaga R, Westmoreland DE, Woods EF, Irgen-Gioro S, Nagasing B, Seideman T, Hersam MC, Kalow JA, Weiss EA. Light-Triggered Switching of Quantum Dot Photoluminescence through Excited-State Electron Transfer to Surface-Bound Photochromic Molecules. NANO LETTERS 2021; 21:854-860. [PMID: 33395307 DOI: 10.1021/acs.nanolett.0c04611] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This paper describes reversible "on-off" switching of the photoluminescence (PL) intensity of CdSe quantum dots (QDs), mediated by photochromic furylfulgide carboxylate (FFC) molecules chemisorbed to the surfaces of the QDs. Repeated cycles of UV and visible illumination switch the FFC between "closed" and "open" isomers. Reversible switching of the QDs' PL intensity by >80% is enabled by different rates and yields of PL-quenching photoinduced electron transfer (PET) from the QDs to the respective isomers. This difference is consistent with cyclic voltammetry measurements and density functional calculations of the isomers' frontier orbital energies. This work demonstrates fatigue-resistant modulation of the PL of a QD-molecule complex through remote control of PET. Such control potentially enables applications, such as all-optical memory, sensing, and imaging, that benefit from a fast, tunable, and reversible response to light stimuli.
Collapse
|
4
|
Luminescent switch of polysaccharide-peptide-quantum dot nanostructures for targeted-intracellular imaging of glioblastoma cells. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112759] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
5
|
La Rosa M, Payne EH, Credi A. Semiconductor Quantum Dots as Components of Photoactive Supramolecular Architectures. ChemistryOpen 2020; 9:200-213. [PMID: 32055433 PMCID: PMC7008307 DOI: 10.1002/open.201900336] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/08/2020] [Indexed: 11/10/2022] Open
Abstract
Luminescent quantum dots (QDs) are colloidal semiconductor nanocrystals consisting of an inorganic core covered by a molecular layer of organic surfactants. Although QDs have been known for more than thirty years, they are still attracting the interest of researchers because of their unique size-tunable optical and electrical properties arising from quantum confinement. Moreover, the controlled decoration of the QD surface with suitable molecular species enables the rational design of inorganic-organic multicomponent architectures that can show a vast array of functionalities. This minireview highlights the recent progress in the use of surface-modified QDs - in particular, those based on cadmium chalcogenides - as supramolecular platforms for light-related applications such as optical sensing, triplet photosensitization, photocatalysis and phototherapy.
Collapse
Affiliation(s)
- Marcello La Rosa
- CLAN-Center for Light Activated Nanostructures Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, ViaGobetti 10140129BolognaItaly
- Dipartimento di Scienze e Tecnologie Agro-alimentariUniversità di BolognaViale Fanin 5040127BolognaItaly
| | - Emily H. Payne
- CLAN-Center for Light Activated Nanostructures Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, ViaGobetti 10140129BolognaItaly
- EaStChem School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
| | - Alberto Credi
- CLAN-Center for Light Activated Nanostructures Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, ViaGobetti 10140129BolognaItaly
- Dipartimento di Chimica Industriale “Toso Montanari”Università di BolognaViale Risorgimento 440136BolognaItaly
| |
Collapse
|
6
|
Jung S, Chen X. Quantum Dot-Dye Conjugates for Biosensing, Imaging, and Therapy. Adv Healthc Mater 2018; 7:e1800252. [PMID: 29862653 PMCID: PMC6149543 DOI: 10.1002/adhm.201800252] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 04/17/2018] [Indexed: 01/14/2023]
Abstract
Adding value to the intrinsic properties of quantum dots (QDs), a strategy to conjugate dyes on the surface of QDs offers new opportunities, since the coupling between QD and dyes can be designed to allow Förster resonance energy transfer (FRET) and/or electron transfer (eT). These processes are accompanied by the change of QD and/or dye fluorescence and subsequent photochemical reactions (e.g., generation of 1 O2 ). Based on the change of fluorescence signals by the interaction with biomolecules, QD-dye conjugates are exploited as biosensors for the detection of pH, O2 , nicotinamide adenine dinucleotide (phosphate), ions, proteases, glutathione, and microRNA. QD-dye conjugates also can be modulated by the irradiation of external light; this concept is demonstrated for fluorescence super-resolution imaging as photoactivatable or photoswitchable probes. When QDs are conjugated with photosensitizing dyes, the QD-dye conjugates can generate 1 O2 in a repetitive manner for better cancer treatment, and can also be available for approaches using two-photon excitation or bioluminescence resonance energy transfer mechanisms for deep tissue imaging. Here, the recent advances in QD-dye conjugates, where FRET or eT produces fluorescence readouts or photochemical reactions, are reviewed. Various QD-dye conjugate systems and their biosensing/imaging and photodynamic therapeutics are summarized.
Collapse
Affiliation(s)
- Sungwook Jung
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| |
Collapse
|
7
|
Photoactive hybrid nanosystem based on CdS quantum dot and novel diarylethylene photochrome as FRET acceptor. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.02.055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
8
|
Chashchikhin OV, Budyka MF. Hybrid nanosystems based on colloidal quantum dots and organic ligands (Review). HIGH ENERGY CHEMISTRY 2018. [DOI: 10.1134/s0018143918010022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Chashchikhin OV, Budyka MF. Spectral and photochemical properties of hybrid organic-inorganic nanosystems based on CdS quantum dots and merocyanine ligands. Photochem Photobiol Sci 2017; 16:1252-1259. [PMID: 28617494 DOI: 10.1039/c7pp00137a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The spectral and photochemical properties of hybrid organic-inorganic nanosystems (HNSs) were investigated. HNS consisted of CdS quantum dots (QDs) functionalized with ligands containing the isothiouronium anchor group linked by a polymethylene chain with photochromic merocyanine (MC). The HNS synthesis was carried out via a microwave-assisted one-pot technique. Energy transfer from the QDs to MC in the HNS was observed and resulted in QD fluorescence quenching and MC sensitization. Compared to the free MC, trans-cis photoisomerization of MC in the HNS was suppressed and its photodestruction was accelerated. In addition, upon HNS photolysis by visible light with energy higher than the threshold, the photosensitized destruction of the QDs (which did not absorb the applied light) occurred. The observed effects were proposed to be caused by MC adsorption on QDs surface, which leads to the restriction of the MC photoisomerization and population of the surface electron trap states of the QDs.
Collapse
Affiliation(s)
- Oleg V Chashchikhin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow region 142432, Russian Federation.
| | - Mikhail F Budyka
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow region 142432, Russian Federation.
| |
Collapse
|
10
|
Jung S, Park J, Bang J, Kim JY, Kim C, Jeon Y, Lee SH, Jin H, Choi S, Kim B, Lee WJ, Pack CG, Lee JB, Lee NK, Kim S. Light-Induced Fluorescence Modulation of Quantum Dot-Crystal Violet Conjugates: Stochastic Off-On-Off Cycles for Multicolor Patterning and Super-Resolution. J Am Chem Soc 2017; 139:7603-7615. [PMID: 28493679 DOI: 10.1021/jacs.7b02530] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Photoswitching or modulation of quantum dots (QDs) can be promising for many fields that include display, memory, and super-resolution imaging. However, such modulations have mostly relied on photomodulations of conjugated molecules in QD vicinity, which typically require high power of high energy photons at UV. We report a visible light-induced facile modulation route for QD-dye conjugates. QD crystal violets conjugates (QD-CVs) were prepared and the crystal violet (CV) molecules on QD quenched the fluorescence efficiently. The fluorescence of QD-CVs showed a single cycle of emission burst as they go through three stages of (i) initially quenched "off" to (ii) photoactivated "on" as the result of chemical change of CVs induced by photoelectrons from QD and (iii) back to photodarkened "off" by radical-associated reactions. Multicolor on-demand photopatterning was demonstrated using QD-CV solid films. QD-CVs were introduced into cells, and excitation with visible light yielded photomodulation from "off" to "on" and "off" by nearly ten fold. Individual photoluminescence dynamics of QD-CVs was investigated using fluorescence correlation spectroscopy and single QD emission analysis, which revealed temporally stochastic photoactivations and photodarkenings. Exploiting the stochastic fluorescence burst of QD-CVs, simultaneous multicolor super-resolution localizations were demonstrated.
Collapse
Affiliation(s)
| | | | - Jiwon Bang
- Korea Institute of Ceramic Engineering and Technology , 101 Soho-ro, Jinju-si, Gyeongnam 52851, South Korea
| | | | | | | | | | | | | | | | | | - Chan-Gi Pack
- Department of Convergence Medicine, University of Ulsan College of Medicine & Asan Institute for Life Sciences , Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea
| | | | - Nam Ki Lee
- Department of Chemistry, Seoul National University , Seoul 08826, South Korea
| | | |
Collapse
|
11
|
Chashchikhin O, Budyka MF, Gavrishova TN, Li VM. Microwave-assisted one-pot synthesis of hybrid nanosystems based on CdS quantum dots functionalized with organic chromophores: effect of the chromophore nature on the nanosystem composition. RSC Adv 2017. [DOI: 10.1039/c6ra27577j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Quantum dot/organic dye nanosystems were synthesised via a one-pot technique. Different dependences of the nanosystem composition on the synthetic conditions for different dyes were observed.
Collapse
Affiliation(s)
- Oleg V. Chashchikhin
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Mikhail F. Budyka
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Tatiana N. Gavrishova
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| | - Vitalii M. Li
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Chernogolovka
- Russian Federation
| |
Collapse
|
12
|
Budyka MF, Chashchikhin OV. Spectral and photochemical properties of hybrid organic—inorganic nanosystems based on CdS quantum dots and a styrylquinoline ligand. HIGH ENERGY CHEMISTRY 2016. [DOI: 10.1134/s0018143916050076] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
13
|
Silvi S, Baroncini M, La Rosa M, Credi A. Interfacing Luminescent Quantum Dots with Functional Molecules for Optical Sensing Applications. Top Curr Chem (Cham) 2016; 374:65. [PMID: 27580893 DOI: 10.1007/s41061-016-0066-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 08/17/2016] [Indexed: 12/30/2022]
Abstract
Semiconductor quantum dots possess unique size-dependent electronic properties and are of high potential interest for the construction of functional nanodevices. Photoinduced electron- and energy-transfer processes between quantum dots and surface-bound molecular species open up attractive routes to implement chemical switching of luminescence, which is at the basis of luminescence sensing. In this article, we discuss the general principles underlying the rational design of this kind of multicomponent species. Successively, we illustrate a few prominent examples, taken from the recent literature, of luminescent chemosensors constructed by attaching molecular species to the surface of quantum dots.
Collapse
Affiliation(s)
- Serena Silvi
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, 40126, Bologna, Italy.
| | - Massimo Baroncini
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, 40126, Bologna, Italy
| | - Marcello La Rosa
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, 40126, Bologna, Italy
| | - Alberto Credi
- Dipartimento di Scienze e Tecnologie Agro-alimentari, Università di Bologna, viale Fanin 44, 40129, Bologna, Italy.
| |
Collapse
|
14
|
Budyka MF, Chaschikhin OV, Nikulin PA. Effect of coordinating ligand on spectral-luminescent properties of CdS quantum dots in microwave synthesis. ACTA ACUST UNITED AC 2015. [DOI: 10.1134/s199507801501005x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
15
|
Credi A, Prodi L. Inner filter effects and other traps in quantitative spectrofluorimetric measurements: Origins and methods of correction. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.03.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
16
|
Claussen JC, Hildebrandt N, Susumu K, Ancona MG, Medintz IL. Complex logic functions implemented with quantum dot bionanophotonic circuits. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3771-8. [PMID: 24354314 DOI: 10.1021/am404659f] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We combine quantum dots (QDs) with long-lifetime terbium complexes (Tb), a near-IR Alexa Fluor dye (A647), and self-assembling peptides to demonstrate combinatorial and sequential bionanophotonic logic devices that function by time-gated Förster resonance energy transfer (FRET). Upon excitation, the Tb-QD-A647 FRET-complex produces time-dependent photoluminescent signatures from multi-FRET pathways enabled by the capacitor-like behavior of the Tb. The unique photoluminescent signatures are manipulated by ratiometrically varying dye/Tb inputs and collection time. Fluorescent output is converted into Boolean logic states to create complex arithmetic circuits including the half-adder/half-subtractor, 2:1 multiplexer/1:2 demultiplexer, and a 3-digit, 16-combination keypad lock.
Collapse
Affiliation(s)
- Jonathan C Claussen
- Center for Bio/Molecular Science and Engineering, Code 6900; ‡Optical Sciences Division, Code 5600; §Electronics Science and Technology Division, Code 6876; U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | | | | | | | | |
Collapse
|
17
|
|
18
|
Sun J, Jia L, Emond M, Li MH, Marie E, Jullien L, Tribet C. Photocontrolled Ionization in the Corona of Rodlike Assemblies of Diblock Copolymers. Macromolecules 2014. [DOI: 10.1021/ma402591y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jing Sun
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Lin Jia
- Institut
Curie, Centre de Recherche, Laboratoire Physico-Chimie Curie, UMR 168 CNRS-IC-UPMC, 26 rue d’Ulm, F-75248 Paris, France
| | - Matthieu Emond
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Min-Hui Li
- Institut
Curie, Centre de Recherche, Laboratoire Physico-Chimie Curie, UMR 168 CNRS-IC-UPMC, 26 rue d’Ulm, F-75248 Paris, France
| | - Emmanuelle Marie
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Ludovic Jullien
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Christophe Tribet
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| |
Collapse
|
19
|
Montalti M, Prodi L, Rampazzo E, Zaccheroni N. Dye-doped silica nanoparticles as luminescent organized systems for nanomedicine. Chem Soc Rev 2014; 43:4243-68. [DOI: 10.1039/c3cs60433k] [Citation(s) in RCA: 222] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This review summarizes developments and applications of luminescent dye doped silica nanoparticles as versatile organized systems for nanomedicine.
Collapse
Affiliation(s)
- M. Montalti
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| | - L. Prodi
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| | - E. Rampazzo
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| | - N. Zaccheroni
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| |
Collapse
|
20
|
Massaad J, Coppel Y, Sliwa M, Kahn ML, Coudret C, Gauffre F. Photocontrol of luminescent inorganic nanocrystals via an organic molecular switch. Phys Chem Chem Phys 2014; 16:22775-83. [DOI: 10.1039/c4cp03537b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The photoluminescence of ZnO nanocrystals is reversibly modulated via a diarylethene photoswitch, and the photophysics mechanism was unraveled.
Collapse
Affiliation(s)
- J. Massaad
- Laboratoire des interactions moléculaires
- réactivité chimique et photochimique UMR5623 CNRS and Université de Toulouse-Université P. Sabatier
- 31062 Toulouse, France
| | - Y. Coppel
- Laboratoire de Chimie de Coordination UPR8241 CNRS 205
- Toulouse cedex 04, France
| | - M. Sliwa
- Laboratoire de Spectrochimie Infrarouge et Raman
- Université Lille Nord de France
- Lille1
- LASIR
- , France
| | - M. L. Kahn
- Laboratoire de Chimie de Coordination UPR8241 CNRS 205
- Toulouse cedex 04, France
| | - C. Coudret
- Laboratoire des interactions moléculaires
- réactivité chimique et photochimique UMR5623 CNRS and Université de Toulouse-Université P. Sabatier
- 31062 Toulouse, France
| | - F. Gauffre
- Institut des Sciences Chimiques de Rennes
- UMR 6226 CNRS
- Université Rennes 1
- Campus Beaulieu
- 35042 Rennes Cedex, France
| |
Collapse
|
21
|
Kalwarczyk E, Ziębacz N, Kalwarczyk T, Hołyst R, Fiałkowski M. A "wrap-and-wrest" mechanism of fluorescence quenching of CdSe/ZnS quantum dots by surfactant molecules. NANOSCALE 2013; 5:9908-9916. [PMID: 23982442 DOI: 10.1039/c3nr03293k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We identified a mechanism of fluorescence quenching of CdSe/ZnS quantum dots (QDs) coated with two organic layers, octadecylamine and an amphiphilic polymer containing COOH groups, by nonionic polyoxyethylene-based (C12En) surfactants. The surfactant molecules by themselves do not affect the fluorescence of the QDs. For the quenching to occur, "wrapping" of the QDs by a bilayer of the surfactant molecules is necessary. The formation of the bilayer causes an irreversible detachment ("wresting") of the ligand molecules, accompanied by the creation of quenching sites on the QD surface. Due to its two-stage nature, we refer to the quenching mechanism as the "wrap-and-wrest" mechanism. The adsorption of the surfactant on the QD surface is a relatively slow process, occurring within minutes or hours. Such long quenching times allowed monitoring surfactant adsorption progress in real time. The fluorescence signal decays exponentially, and the decay time is inversely proportional to the surfactant concentration in solution.
Collapse
Affiliation(s)
- Ewelina Kalwarczyk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | | | | | | | | |
Collapse
|
22
|
Gallagher SA, Comby S, Wojdyla M, Gunnlaugsson T, Kelly JM, Gun’ko YK, Clark IP, Greetham GM, Towrie M, Quinn SJ. Efficient Quenching of TGA-Capped CdTe Quantum Dot Emission by a Surface-Coordinated Europium(III) Cyclen Complex. Inorg Chem 2013; 52:4133-5. [DOI: 10.1021/ic3027623] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
| | - Steve Comby
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Michal Wojdyla
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - John M. Kelly
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Yurii K. Gun’ko
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland
| | - Ian P. Clark
- Central Laser Facility, Research Complex at Harwell, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, U.K
| | - Gregory M. Greetham
- Central Laser Facility, Research Complex at Harwell, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, U.K
| | - Michael Towrie
- Central Laser Facility, Research Complex at Harwell, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, U.K
| | - Susan J. Quinn
- School of
Chemistry and Chemical Biology, University College Dublin, Dublin 4, Ireland
| |
Collapse
|
23
|
Díaz SA, Giordano L, Azcárate JC, Jovin TM, Jares-Erijman EA. Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation. J Am Chem Soc 2013; 135:3208-17. [DOI: 10.1021/ja3117813] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sebastián A. Díaz
- Laboratory of Cellular Dynamics, Max Planck Institute for Biophysical Chemistry, Am
Fassberg 11, 37077 Göttingen, Germany
- Departamento de Química
Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CIHIDECAR, CONICET, 1428
Buenos Aires, Argentina
| | - Luciana Giordano
- Laboratory of Cellular Dynamics, Max Planck Institute for Biophysical Chemistry, Am
Fassberg 11, 37077 Göttingen, Germany
| | - Julio C. Azcárate
- Instituto
de Investigaciones Fisicoquímicas
Teóricas y Aplicadas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, La Plata,
Argentina
| | - Thomas M. Jovin
- Laboratory of Cellular Dynamics, Max Planck Institute for Biophysical Chemistry, Am
Fassberg 11, 37077 Göttingen, Germany
| | - Elizabeth A. Jares-Erijman
- Departamento de Química
Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CIHIDECAR, CONICET, 1428
Buenos Aires, Argentina
| |
Collapse
|
24
|
Nguyen TD. Portraits of colloidal hybrid nanostructures: controlled synthesis and potential applications. Colloids Surf B Biointerfaces 2012; 103:326-44. [PMID: 23247263 DOI: 10.1016/j.colsurfb.2012.10.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Revised: 10/28/2012] [Accepted: 10/29/2012] [Indexed: 10/27/2022]
Abstract
Inorganic hybrid nanostructures containing two or more nanocomponents have been emerging in many areas of materials science in recent years. The particle-particle interactions in a hybrid particle system could significantly improve existing local electronic structure and induce tunable physiochemical responses. The current work reviews the diverse inorganic hybrid nanostructures formed by adhesion of the different single components via seed-mediated method. The hybrid nanomaterials have great potentials for real applications in many other fields. The nanohybrids have been used as efficient heterocatalysts for carbon monoxide conversion and photodegradation of organic contaminants. The enhanced catalytic activity of these hybrid nanocatalysts could be attributed the formation of oxygen vacancies and electron transfer across the structural junction in a hybrid system as a result of the interfacial particle-particle interactions. The synergistic combination of up-converting and semiconducting properties in an up-converting semiconducting hybrid particle results in appearance of sub-band-gap photoconductivity. This behavior has a great significance for the design of photovoltaic devices for effective solar energy conversion. The functionalization and subsequent bioconjugation of the hybrid nanostructures to afford the multifunctional nanomedical platforms for simultaneous diagnosis and therapy are reviewed. The conjugated multifunctional hybrid nanostructures exhibit high biocompatibility and highly selective binding with functional groups-fabricated alive organs through delivering them to the tumor sites. The clever combinations of multifunctional features and antibody conjugation within these vehicles make them to generally offer new opportunities for clinical diagnostics and therapeutics.
Collapse
Affiliation(s)
- Thanh-Dinh Nguyen
- Department of Chemical Engineering, Laval University, Quebec G1K 7P4, Canada.
| |
Collapse
|