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Rahmani R, Lyubartsev AP. Biomolecular Adsorprion at ZnS Nanomaterials: A Molecular Dynamics Simulation Study of the Adsorption Preferences, Effects of the Surface Curvature and Coating. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2239. [PMID: 37570556 PMCID: PMC10421200 DOI: 10.3390/nano13152239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/25/2023] [Accepted: 07/30/2023] [Indexed: 08/13/2023]
Abstract
The understanding of interactions between nanomaterials and biological molecules is of primary importance for biomedical applications of nanomaterials, as well as for the evaluation of their possible toxic effects. Here, we carried out extensive molecular dynamics simulations of the adsorption properties of about 30 small molecules representing biomolecular fragments at ZnS surfaces in aqueous media. We computed adsorption free energies and potentials of mean force of amino acid side chain analogs, lipids, and sugar fragments to ZnS (110) crystal surface and to a spherical ZnS nanoparticle. Furthermore, we investigated the effect of poly-methylmethacrylate (PMMA) coating on the adsorption preferences of biomolecules to ZnS. We found that only a few anionic molecules: aspartic and glutamic acids side chains, as well as the anionic form of cysteine show significant binding to pristine ZnS surface, while other molecules show weak or no binding. Spherical ZnS nanoparticles show stronger binding of these molecules due to binding at the edges between different surface facets. Coating of ZnS by PMMA changes binding preferences drastically: the molecules that adsorb to a pristine ZnS surface do not adsorb on PMMA-coated surfaces, while some others, particularly hydrophobic or aromatic amino-acids, show high binding affinity due to binding to the coating. We investigate further the hydration properties of the ZnS surface and relate them to the binding preferences of biomolecules.
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Affiliation(s)
| | - Alexander P. Lyubartsev
- Department of Materials and Environmental Chemistry, Stockholm University, S-10691 Stockholm, Sweden
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2
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Heyne B, Geßner A, Wedel A, Taubert A. Dispersion of InPZnS/ZnSe/ZnS multishell quantum dots (QDs) in water: extension to QDs with different core sizes and identical shell thickness. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Benjamin Heyne
- Functional Materials and Devices Fraunhofer Institute for Applied Polymer Research Geiselbergstr. 69 D-14476 Potsdam Germany
| | - André Geßner
- Functional Materials and Devices Fraunhofer Institute for Applied Polymer Research Geiselbergstr. 69 D-14476 Potsdam Germany
| | - Armin Wedel
- Functional Materials and Devices Fraunhofer Institute for Applied Polymer Research Geiselbergstr. 69 D-14476 Potsdam Germany
| | - Andreas Taubert
- Institute of Chemistry University of Potsdam Karl-Liebknecht-Str. 24–25 D-14476 Potsdam Germany
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3
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Heyne B, Arlt K, Geßner A, Richter AF, Döblinger M, Feldmann J, Taubert A, Wedel A. Mixed Mercaptocarboxylic Acid Shells Provide Stable Dispersions of InPZnS/ZnSe/ZnS Multishell Quantum Dots in Aqueous Media. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:nano10091858. [PMID: 32957490 PMCID: PMC7557590 DOI: 10.3390/nano10091858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/09/2020] [Accepted: 09/13/2020] [Indexed: 05/03/2023]
Abstract
Highly luminescent indium phosphide zinc sulfide (InPZnS) quantum dots (QDs), with zinc selenide/zinc sulfide (ZnSe/ZnS) shells, were synthesized. The QDs were modified via a post-synthetic ligand exchange reaction with 3-mercaptopropionic acid (MPA) and 11-mercaptoundecanoic acid (MUA) in different MPA:MUA ratios, making this study the first investigation into the effects of mixed ligand shells on InPZnS QDs. Moreover, this article also describes an optimized method for the correlation of the QD size vs. optical absorption of the QDs. Upon ligand exchange, the QDs can be dispersed in water. Longer ligands (MUA) provide more stable dispersions than short-chain ligands. Thicker ZnSe/ZnS shells provide a better photoluminescence quantum yield (PLQY) and higher emission stability upon ligand exchange. Both the ligand exchange and the optical properties are highly reproducible between different QD batches. Before dialysis, QDs with a ZnS shell thickness of ~4.9 monolayers (ML), stabilized with a mixed MPA:MUA (mixing ratio of 1:10), showed the highest PLQY, at ~45%. After dialysis, QDs with a ZnS shell thickness of ~4.9 ML, stabilized with a mixed MPA:MUA and a ratio of 1:10 and 1:100, showed the highest PLQYs, of ~41%. The dispersions were stable up to 44 days at ambient conditions and in the dark. After 44 days, QDs with a ZnS shell thickness of ~4.9 ML, stabilized with only MUA, showed the highest PLQY, of ~34%.
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Affiliation(s)
- Benjamin Heyne
- Fraunhofer IAP, Geiselbergstraße 69, 14476 Potsdam, Germany; (B.H.); (K.A.); (A.G.)
| | - Kristin Arlt
- Fraunhofer IAP, Geiselbergstraße 69, 14476 Potsdam, Germany; (B.H.); (K.A.); (A.G.)
| | - André Geßner
- Fraunhofer IAP, Geiselbergstraße 69, 14476 Potsdam, Germany; (B.H.); (K.A.); (A.G.)
| | - Alexander F. Richter
- Photonics and Optoelectronics, Nano-Institute Munich and Department of Physics, Ludwig-Maximilians-Universität (LMU), Königinstraße 10, 80539 Munich, Germany; (A.F.R.); (J.F.)
| | - Markus Döblinger
- Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstraße 5-13 (E), 81377 Munich, Germany;
| | - Jochen Feldmann
- Photonics and Optoelectronics, Nano-Institute Munich and Department of Physics, Ludwig-Maximilians-Universität (LMU), Königinstraße 10, 80539 Munich, Germany; (A.F.R.); (J.F.)
| | - Andreas Taubert
- Institute of Chemistry, University of Potsdam, 14469 Potsdam, Germany
- Correspondence: (A.T.); (A.W.); Tel.: +49-(0)331-977-5773 (A.T.); +49-(0)331-568-1910 (A.W.)
| | - Armin Wedel
- Fraunhofer IAP, Geiselbergstraße 69, 14476 Potsdam, Germany; (B.H.); (K.A.); (A.G.)
- Correspondence: (A.T.); (A.W.); Tel.: +49-(0)331-977-5773 (A.T.); +49-(0)331-568-1910 (A.W.)
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4
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Affiliation(s)
- Teresa L. Mako
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Joan M. Racicot
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
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5
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Ouyang T, Liu X, Ouyang H, Ren L. Recent trends in click chemistry as a promising technology for virus-related research. Virus Res 2018; 256:21-28. [PMID: 30081058 PMCID: PMC7173221 DOI: 10.1016/j.virusres.2018.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/27/2018] [Accepted: 08/02/2018] [Indexed: 12/12/2022]
Abstract
Click chemistry involves reactions that were originally introduced and used in organic chemistry to generate substances by joining small units together with heteroatom linkages (C-X-C). Over the last few decades, click chemistry has been widely used in virus-related research. Using click chemistry, the virus particle as well as viral protein and nucleic acids can be labeled. Subsequently, the labeled virions or molecules can be tracked in real time. Here, we reviewed the recent applications of click reactions in virus-related research, including viral tracking, the design of antiviral agents, the diagnosis of viral infection, and virus-based delivery systems. This review provides an overview of the general principles and applications of click chemistry in virus-related research.
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Affiliation(s)
- Ting Ouyang
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China
| | - Xiaohui Liu
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China
| | - Hongsheng Ouyang
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China
| | - Linzhu Ren
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
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6
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Mann VR, Powers AS, Tilley DC, Sack JT, Cohen BE. Azide-Alkyne Click Conjugation on Quantum Dots by Selective Copper Coordination. ACS NANO 2018; 12:4469-4477. [PMID: 29608274 PMCID: PMC5966341 DOI: 10.1021/acsnano.8b00575] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Functionalization of nanocrystals is essential for their practical application, but synthesis on nanocrystal surfaces is limited by incompatibilities with certain key reagents. The copper-catalyzed azide-alkyne cycloaddition is among the most useful methods for ligating molecules to surfaces, but has been largely useless for semiconductor quantum dots (QDs) because Cu+ ions quickly and irreversibly quench QD fluorescence. To discover nonquenching synthetic conditions for Cu-catalyzed click reactions on QD surfaces, we developed a combinatorial fluorescence assay to screen >2000 reaction conditions to maximize cycloaddition efficiency while minimizing QD quenching. We identify conditions for complete coupling without significant quenching, which are compatible with common QD polymer surfaces and various azide/alkyne pairs. Based on insight from the combinatorial screen and mechanistic studies of Cu coordination and quenching, we find that superstoichiometric concentrations of Cu can promote full coupling if accompanied by ligands that selectively compete with the Cu from the QD surface but allow it to remain catalytically active. Applied to the conjugation of a K+ channel-specific peptidyl toxin to CdSe/ZnS QDs, we synthesize unquenched QD conjugates and image their specific and voltage-dependent affinity for K+ channels in live cells.
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Affiliation(s)
- Victor R. Mann
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Alexander S. Powers
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Drew C. Tilley
- Department of Physiology and Membrane Biology, University of California, Davis, California 95616, United States
| | - Jon T. Sack
- Department of Physiology and Membrane Biology, University of California, Davis, California 95616, United States
| | - Bruce E. Cohen
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Corresponding Author:
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7
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Ahmad K, Gogoi SK, Begum R, Sk MP, Paul A, Chattopadhyay A. An Interactive Quantum Dot and Carbon Dot Conjugate for pH-Sensitive and Ratiometric Cu2+Sensing. Chemphyschem 2017; 18:610-616. [DOI: 10.1002/cphc.201601249] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 01/02/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Kafeel Ahmad
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | | | - Raihana Begum
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Md Palashuddin Sk
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Anumita Paul
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Arun Chattopadhyay
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
- Centre for Nanotechnology; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
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8
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Banerjee A, Pons T, Lequeux N, Dubertret B. Quantum dots-DNA bioconjugates: synthesis to applications. Interface Focus 2016; 6:20160064. [PMID: 27920898 PMCID: PMC5071820 DOI: 10.1098/rsfs.2016.0064] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Semiconductor nanoparticles particularly quantum dots (QDs) are interesting alternatives to organic fluorophores for a range of applications such as biosensing, imaging and therapeutics. Addition of a programmable scaffold such as DNA to QDs further expands the scope and applicability of these hybrid nanomaterials in biology. In this review, the most important stages of preparation of QD-DNA conjugates for specific applications in biology are discussed. Special emphasis is laid on (i) the most successful strategies to disperse QDs in aqueous media, (ii) the range of different conjugation with detailed discussion about specific merits and demerits in each case, and (iii) typical applications of these conjugates in the context of biology.
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Affiliation(s)
| | | | | | - Benoit Dubertret
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI ParisTech, CNRS UMR 8213, Université Pierre et Marie Curie, 10 Rue Vauquelin, 75005 Paris, France
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9
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Merkl JP, Wolter C, Flessau S, Schmidtke C, Ostermann J, Feld A, Mews A, Weller H. Investigations of ion transport through nanoscale polymer membranes by fluorescence quenching of CdSe/CdS quantum dot/quantum rods. NANOSCALE 2016; 8:7402-7407. [PMID: 26987974 DOI: 10.1039/c5nr08318d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Detailed steady-state and time-resolved fluorescence quenching measurements give deep insight into ion transport through nanometer thick diblock copolymer membranes, which were assembled as biocompatible shell material around CdSe/CdS quantum dot in quantum rods. We discuss the role of polymer chain length, intermolecular cross-linking and nanopore formation by analysing electron transfer processes from the photoexcited QDQRs to Cu(II) ions, which accumulate in the polymer membrane. Fluorescence investigations on single particle level additionally allow identifying ensemble inhomogeneities.
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Affiliation(s)
- Jan-Philip Merkl
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Christopher Wolter
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Sandra Flessau
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Christian Schmidtke
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Johannes Ostermann
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany. and Center for Applied Nanotechnology (CAN) GmbH, Grindelallee 117, 20146 Hamburg, Germany
| | - Artur Feld
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Alf Mews
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Horst Weller
- Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, and the Hamburg Center for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany. and Center for Applied Nanotechnology (CAN) GmbH, Grindelallee 117, 20146 Hamburg, Germany and Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O BOX 80203 Jeddah 21589, Saudi Arabia
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10
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Grala A, Wolska-Pietkiewicz M, Danowski W, Wróbel Z, Grzonka J, Lewiński J. ‘Clickable’ ZnO nanocrystals: the superiority of a novel organometallic approach over the inorganic sol–gel procedure. Chem Commun (Camb) 2016; 52:7340-3. [DOI: 10.1039/c6cc01430e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate for the first time a highly efficient Cu(i)-catalyzed alkyne–azide cycloaddition reaction on the surface of ZnO nanocrystals with retention of their photoluminescence properties.
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Affiliation(s)
- Agnieszka Grala
- Warsaw University of Technology
- Faculty of Chemistry
- 00-664 Warsaw
- Poland
- Polish Academy of Sciences
| | | | - Wojciech Danowski
- Warsaw University of Technology
- Faculty of Chemistry
- 00-664 Warsaw
- Poland
| | - Zbigniew Wróbel
- Polish Academy of Sciences
- Institute of Physical Chemistry
- 01-224 Warsaw
- Poland
| | - Justyna Grzonka
- Polish Academy of Sciences
- Institute of Physical Chemistry
- 01-224 Warsaw
- Poland
- Warsaw University of Technology
| | - Janusz Lewiński
- Warsaw University of Technology
- Faculty of Chemistry
- 00-664 Warsaw
- Poland
- Polish Academy of Sciences
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11
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de Villiers CA, Lapsley MC, Hall EAH. A step towards mobile arsenic measurement for surface waters. Analyst 2015; 140:2644-55. [PMID: 25822044 DOI: 10.1039/c4an02368d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface modified quantum dots (QDs) are studied using a bio-inspired cysteine rich ligand (glutathione, GSH) and their quenching response and selectivity to arsenic examined. As predicted from As(3+) binding with highly crosslinked phytochelatin-(PCn)-like molecules, better arsenic selectivity is obtained for a thicker more 3-dimensional GSH surface layer, with exposed sulfhydryl groups. A detection limit of at least 10 μM can be achieved using CdSe/ZnS core-shell QDs capped with this GSH structure. The system is also demonstrated using a mobile phone camera to record the measurement, producing a detection limit of 5 μM. However, copper remains the main interferent of concern. Water-soluble CdTe QDs show little sensitivity to As(3+) even with a GSH surface, but they remain sensitive to Cu(2+), allowing a copper baseline to be established from the CdTe measurement. Despite anticipating that spectrally non overlapping fluorescence would be required from the two types of QDs to achieve this, a method is demonstrated using RGB channels from a mobile phone and processing the raw data for CdTe QDs, with an emission wavelength of 600 nm, and CdSe/ZnS QDs, with emission maximum of 630 nm. It is shown that As(3+) measurement remains feasible at the WHO guideline value of 10 μg L(-1) up to a copper concentration of around 0.3 μM Cu(2+), which corresponds to the highest recorded level in a selection of large rivers world-wide.
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Affiliation(s)
- C A de Villiers
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QT, UK.
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12
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Conde J, Dias JT, Grazú V, Moros M, Baptista PV, de la Fuente JM. Revisiting 30 years of biofunctionalization and surface chemistry of inorganic nanoparticles for nanomedicine. Front Chem 2014; 2:48. [PMID: 25077142 PMCID: PMC4097105 DOI: 10.3389/fchem.2014.00048] [Citation(s) in RCA: 224] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 06/24/2014] [Indexed: 01/04/2023] Open
Abstract
In the last 30 years we have assisted to a massive advance of nanomaterials in material science. Nanomaterials and structures, in addition to their small size, have properties that differ from those of larger bulk materials, making them ideal for a host of novel applications. The spread of nanotechnology in the last years has been due to the improvement of synthesis and characterization methods on the nanoscale, a field rich in new physical phenomena and synthetic opportunities. In fact, the development of functional nanoparticles has progressed exponentially over the past two decades. This work aims to extensively review 30 years of different strategies of surface modification and functionalization of noble metal (gold) nanoparticles, magnetic nanocrystals and semiconductor nanoparticles, such as quantum dots. The aim of this review is not only to provide in-depth insights into the different biofunctionalization and characterization methods, but also to give an overview of possibilities and limitations of the available nanoparticles.
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Affiliation(s)
- João Conde
- Harvard-MIT Division for Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of TechnologyCambridge, MA, USA
| | - Jorge T. Dias
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Valeria Grazú
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Maria Moros
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Pedro V. Baptista
- CIGMH, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de LisboaCaparica, Portugal
| | - Jesus M. de la Fuente
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
- Fundacion ARAIDZaragoza, Spain
- Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Bio-Nano Science and Engineering, Institute of Nano Biomedicine and Engineering, Research Institute of Translation Medicine, Shanghai Jiao Tong UniversityShanghai, China
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13
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Wu P, Zhao T, Wang S, Hou X. Semicondutor quantum dots-based metal ion probes. NANOSCALE 2014; 6:43-64. [PMID: 24270674 DOI: 10.1039/c3nr04628a] [Citation(s) in RCA: 161] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Semiconductor quantum dots (QDs) exhibit unique optical and photophysical properties that offer significant advantages over organic dyes as optical labels for chemo/bio-sensing. This review addresses the methods for metal ion detection with QDs, including photoluminescent, electrochemiluminescent, photoelectrochemical, and electrochemical approaches. The main mechanisms of direct interaction between QDs and metal ions which lead to photoluminescence being either off or on, are discussed in detail. These direct interactions provide great opportunities for developing simple yet effect metal ion probes. Different methods to design the chemically-modified QD hybrid structures through anchoring metal ion-specific groups onto the surface of QDs are summarized. Due to the spatial separation of the luminescence center and analyte recognition sites, these chemically-modified QDs offer greatly improved sensitivity and selectivity for metal ions. Several interesting applications of QD-based metal ion probes are presented, with specific emphasis on cellular probes, coding probes and sensing with logic gate operations.
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Affiliation(s)
- Peng Wu
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China.
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14
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Li P, Zhang J, Wang H, Jing H, Xu J, Sui X, Hu H, Yin H. The photoelectric catalytic reduction of CO2 to methanol on CdSeTe NSs/TiO2 NTs. Catal Sci Technol 2014. [DOI: 10.1039/c3cy00978e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The preparation of orderly CdSeTe with a flaky structure (similar to the solar panels), and then the assembly of the CdSeTe nanosheets (CdSeTe NSs) onto TiO2 NTs (the TiO2 NTs are equivalent to the roof).
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Affiliation(s)
- Peiqiang Li
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Jun Zhang
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Huying Wang
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Hua Jing
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Jinfeng Xu
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Xiaona Sui
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Haitao Hu
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
| | - Hongzong Yin
- College of Chemistry and Material Science
- Shandong Agricultural University
- , People's Republic of China
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15
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Zhang H, Feng G, Guo Y, Zhou D. Robust and specific ratiometric biosensing using a copper-free clicked quantum dot-DNA aptamer sensor. NANOSCALE 2013; 5:10307-15. [PMID: 24056667 PMCID: PMC3814187 DOI: 10.1039/c3nr02897f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 08/13/2013] [Indexed: 05/30/2023]
Abstract
We report herein the successful preparation of a compact and functional CdSe-ZnS core-shell quantum dot (QD)-DNA conjugate via highly efficient copper-free "click chemistry" (CFCC) between a dihydro-lipoic acid-polyethylene glycol-azide (DHLA-PEG-N3) capped QD and a cyclooctyne modified DNA. This represents an excellent balance between the requirements of high sensitivity, robustness and specificity for the QD-FRET (Förster resonance energy transfer) based sensor as confirmed by a detailed FRET analysis on the QD-DNA conjugate, yielding a relatively short donor-acceptor distance of ~5.8 nm. We show that this CFCC clicked QD-DNA conjugate is not only able to retain the native fluorescence quantum yield (QY) of the parent DHLA-PEG-N3 capped QD, but also well-suited for robust and specific biosensing; it can directly quantitate, at the pM level, both labelled and unlabelled complementary DNA probes with a good SNP (single-nucleotide polymorphism) discrimination ability in complex media, e.g. 10% human serum via target-binding induced FRET changes between the QD donor and the dye acceptor. Furthermore, this sensor has also been successfully exploited for the detection, at the pM level, of a specific protein target (thrombin) via the encoded anti-thrombin aptamer sequence in the QD-DNA conjugate.
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Affiliation(s)
- Haiyan Zhang
- School of Chemistry and Astbury Centre for Structural Molecular Biology , University of Leeds , Leeds LS2 9JT , UK . ;
| | - Guoqiang Feng
- Key Laboratory of Pesticide and Chemical Biology of Ministry of Education , College of Chemistry , Central China Normal University , 152 Luoyu Road , Wuhan 430079 , P.R. China
| | - Yuan Guo
- School of Chemistry and Astbury Centre for Structural Molecular Biology , University of Leeds , Leeds LS2 9JT , UK . ;
| | - Dejian Zhou
- School of Chemistry and Astbury Centre for Structural Molecular Biology , University of Leeds , Leeds LS2 9JT , UK . ;
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Ostermann J, Merkl JP, Flessau S, Wolter C, Kornowksi A, Schmidtke C, Pietsch A, Kloust H, Feld A, Weller H. Controlling the physical and biological properties of highly fluorescent aqueous quantum dots using block copolymers of different size and shape. ACS NANO 2013; 7:9156-9167. [PMID: 24032605 DOI: 10.1021/nn4037859] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The phase transfer of fluorescent CdSe based quantum dots (QDs) while retaining their properties and offering some advantages concerning the stability and functionalization characteristics is an important and intensively investigated field of research. Here we report how to tune and control the properties of CdSe/CdS/ZnS core-shell-shell QDs in water, using poly(isoprene-block-ethylene oxide) (PI-b-PEO) as a versatile system of amphiphilic diblock copolymers for the micellular encapsulation of nanoparticles (NPs). We show the synthesis of a novel PI-b-(PEO)2 miktoarm star polymer and how this different architecture besides the variation of the polymers' molecular weight gives us the opportunity to control the size of the built constructs in water between 24 and 53 nm. Because of this size control, an upper limit of the construct's diameter for the cellular uptake could be determined by a systemic study with human alveolar epithelial cells (A549) and murine macrophage leukemia cell (RAW-264.7). Furthermore, fluorescence quenching experiments with copper(II) and iron(III) ions show a strong influence of the used polymer on the shielding against these ions. This enables us to control the permeability of the polymer shell from very porous shells, which allow an almost complete cation exchange up to very dense shells. These even offer the possibility to perform copper(I) catalyzed click reactions while keeping the fluorescence of the QDs. All these results underline the huge variability and controllability of the PI-b-PEO diblock copolymer system for the encapsulation and functionalization of nanoparticles for biological applications. As a general trend, it can be stated that those coatings, which were most stable against quenchers, also showed the best resistivity with respect to unspecific cellular uptake.
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Affiliation(s)
- Johannes Ostermann
- Institute of Physical Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
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An FF, Ye J, Zhang JF, Yang YL, Zheng CJ, Zhang XJ, Liu Z, Lee CS, Zhang XH. Non-blinking, highly luminescent, pH- and heavy-metal-ion-stable organic nanodots for bio-imaging. J Mater Chem B 2013; 1:3144-3151. [DOI: 10.1039/c3tb20271b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Hao J, Huang LL, Zhang R, Wang HZ, Xie HY. A mild and reliable method to label enveloped virus with quantum dots by copper-free click chemistry. Anal Chem 2012; 84:8364-70. [PMID: 22946933 DOI: 10.1021/ac301918t] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Real-time tracking of the dynamic process of virus invasion is crucial to understanding the infection mechanism. For successful tracking, efficient labeling methods are indispensable. In this paper, we report a mild and reliable method for labeling viruses, especially with regard to easily disabled enveloped viruses. The copper-free click chemistry has been used to label enveloped viruses with quantum dots (QDs) by linking virions modified with azide to the QDs derived with dibenzocyclooctynes (DBCO). Both vaccinia virus (VACV) and avian influenza A virus (H9N2) can be specifically and rapidly labeled under mild conditions, with a labeling efficiency of more than 80%. The labeled virions were of intact infectivity, and their fluorescence was strong enough to realize single-virion tracking. Compared to previously reported methods, our method is less destructive, reliable, and universal, without specific requirements for the type and structure of viruses to be labeled, which has laid the foundation for long-term dynamic visualization of virus infection process.
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Affiliation(s)
- Jian Hao
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
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