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Karakhanov E, Maximov A, Zolotukhina A. Heterogeneous Dendrimer-Based Catalysts. Polymers (Basel) 2022; 14:981. [PMID: 35267800 PMCID: PMC8912888 DOI: 10.3390/polym14050981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 02/04/2023] Open
Abstract
The present review compiles the advances in the dendritic catalysis within the last two decades, in particular concerning heterogeneous dendrimer-based catalysts and their and application in various processes, such as hydrogenation, oxidation, cross-coupling reactions, etc. There are considered three main approaches to the synthesis of immobilized heterogeneous dendrimer-based catalysts: (1) impregnation/adsorption on silica or carbon carriers; (2) dendrimer covalent grafting to various supports (silica, polystyrene, carbon nanotubes, porous aromatic frameworks, etc.), which may be performed in a divergent (as a gradual dendron growth on the support) or convergent way (as a grafting of whole dendrimer to the support); and (3) dendrimer cross-linking, using transition metal ions (resulting in coordination polymer networks) or bifunctional organic linkers, whose size, polarity, and rigidity define the properties of the resulted material. Additionally, magnetically separable dendritic catalysts, which can be synthesized using the three above-mentioned approaches, are also considered. Dendritic catalysts, synthesized in such ways, can be stored as powders and be easily separated from the reaction medium by filtration/centrifugation as traditional heterogeneous catalysts, maintaining efficiency as for homogeneous dendritic catalysts.
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Affiliation(s)
- Eduard Karakhanov
- Department of Petroleum Chemistry and Organic Catalysis, Moscow State University, 119991 Moscow, Russia;
| | - Anton Maximov
- Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia;
| | - Anna Zolotukhina
- Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia;
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2
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Zhang Y, Zhou W, Wang J, Jia L, Liu L, Tan X, Yu T, Ye J. Hydrated electrons mediated in-situ construction of cubic phase CdS/Cd thin layer on a millimeter-scale support for photocatalytic hydrogen evolution. J Colloid Interface Sci 2021; 607:769-781. [PMID: 34536934 DOI: 10.1016/j.jcis.2021.09.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 12/14/2022]
Abstract
In this study, non-noble metal Cd decorated cubic phase CdS (CdS/Cd) thin layer on a millimeter-scale chitosan-Mg(OH)2 xerogel beads (CMB) were elaborately designed and successfully synthesized via facile hydrated electrons (eaq•-) assistant strategy. The in-situ formation of metallic Cd was driven by eaq•- generated from UV/Na2SO3 process. Owing to metallic Cd, CMB@CdS/Cd exhibited better visible-light absorption ability and more efficient separation capability for photo-induced carriers, its hydrogen production efficiency was about threefold improved compared to CMB@CdS. Both characterization methods and density functional theory calculations determined a built-in electric field from metallic Cd to CdS and Ohmic-contact between Cd and CdS, which largely promoted the carriers transfer efficiency. Moreover, the introduction of metallic Cd on the CdS could reduce the ΔGH*, thus greatly boosting the photocatalytic hydrogen production efficiency. This work provides a simple and green approach to construct metallic Cd coupled semiconductor to achieve efficient photocatalytic applications.
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Affiliation(s)
- Yizhong Zhang
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Wei Zhou
- School of Science, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Junyan Wang
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Lixia Jia
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Lequan Liu
- TJU-NIMS International Collaboration Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, People's Republic of China
| | - Xin Tan
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China; School of Science, Tibet University, No. 36 Jiangsu Road, Lhasa 850000, People's Republic of China
| | - Tao Yu
- School of Chemical Engineering and Technology, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China; TJU-NIMS International Collaboration Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, People's Republic of China.
| | - Jinhua Ye
- TJU-NIMS International Collaboration Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, People's Republic of China; International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Wang Y, Zhu X. Nanofabrication within unimolecular nanoreactors. NANOSCALE 2020; 12:12698-12711. [PMID: 32525189 DOI: 10.1039/d0nr02674c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanoparticles (NPs) have been a research focus over the last three decades owing to their unique properties and extensive applications. It is crucial to precisely control the features of NPs including topology, architecture, composition, size, surface and assembly because these features will affect their properties and then applications. Ingenious nanofabrication strategies have been developed to precisely control these features of NPs, especially for templated nanofabrication within predesigned nanoreactors. Compared with conventional nanoreactors (hard templates and supramolecular nanoreactors), unimolecular nanoreactors exhibit (1) covalently stable nanostructures uninfluenced by environmental variations, (2) extensively regulated features of the structure including topology, composition, size, surface and valence due to the rapid development of polymer chemistry, and (3) effective encapsulation of abundant guests with or without strong interaction to achieve the function of loading, delivery and conversion of guests. Thus, unimolecular nanoreactors have shown fascinating prospects as templates for nanofabrication. Various NPs with expected topologies (sphere, rod, tube, branch, and ring), architectures (compact, hollow, core-shell, and necklace-like), compositions (metal, metal oxide, semiconductor, doping, alloy, silica, and composite), sizes (generally 1-100 nm), surface properties (hydrophilic, hydrophobic, reactivity, valence and responsivity) and assemblies (oligomer, chain, and aggregate) can be fabricated easily within reasonably designed unimolecular nanoreactors in a programmable way. In this review, we provide a brief introduction of the properties and types of unimolecular nanoreactors, a condensed summary of representative methodologies of nanofabrication within various unimolecular nanoreactors and a predicted outlook of the potential further developments of this charming nanofabrication approach.
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Affiliation(s)
- Youfu Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
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4
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Xie MM, Wang BB, Zhang P. The effect of crystallization behavior on high conductivity, enhanced mechanism and thermal stability of poly(ε-caprolactone)/multi-walled carbon nanotube composites. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2018.1464470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Miao-miao Xie
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China
| | - Bin-bin Wang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China
| | - Peng Zhang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China
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5
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Martínez Á, Fuentes-Paniagua E, Baeza A, Sánchez-Nieves J, Cicuéndez M, Gómez R, de la Mata FJ, González B, Vallet-Regí M. Mesoporous Silica Nanoparticles Decorated with Carbosilane Dendrons as New Non-viral Oligonucleotide Delivery Carriers. Chemistry 2015; 21:15651-66. [PMID: 26361378 DOI: 10.1002/chem.201501966] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Indexed: 11/07/2022]
Abstract
A novel nanosystem based on mesoporous silica nanoparticles covered with carbosilane dendrons grafted on the external surface of the nanoparticles is reported. This system is able to transport single-stranded oligonucleotide into cells, avoiding an electrostatic repulsion between the cell membrane and the negatively charged nucleic acids thanks to the cationic charge provided by the dendron coating under physiological conditions. Moreover, the presence of the highly ordered pore network inside the silica matrix would make possible to allocate other therapeutic agents within the mesopores with the aim of achieving a double delivery. First, carbosilane dendrons of second and third generation possessing ammonium or tertiary amine groups as peripheral functional groups were prepared. Hence, different strategies were tested in order to obtain their suitable grafting on the outer surface of the nanoparticles. As nucleic acid model, a single-stranded DNA oligonucleotide tagged with a fluorescent Cy3 moiety was used to evaluate the DNA adsorption capacity. The hybrid material functionalised with the third generation of a neutral dendron showed excellent DNA binding properties. Finally, the cytotoxicity as well as the capability to deliver DNA into cells, was tested in vitro by using a human osteoblast-like cell line, achieving good levels of internalisation of the vector DNA/carbosilane dendron-functionalised material without affecting the cellular viability.
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Affiliation(s)
- Ángel Martínez
- Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid (Spain).,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain)
| | - Elena Fuentes-Paniagua
- Departamento de Química Orgánica y Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares (Spain).,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain)
| | - Alejandro Baeza
- Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid (Spain).,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain)
| | - Javier Sánchez-Nieves
- Departamento de Química Orgánica y Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares (Spain).,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain)
| | - Mónica Cicuéndez
- Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid (Spain).,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain)
| | - Rafael Gómez
- Departamento de Química Orgánica y Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares (Spain).,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain)
| | - F Javier de la Mata
- Departamento de Química Orgánica y Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares (Spain). .,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain).
| | - Blanca González
- Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid (Spain). .,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain).
| | - María Vallet-Regí
- Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid (Spain). .,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) (Spain).
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Mehra NK, Jain NK. Multifunctional hybrid-carbon nanotubes: new horizon in drug delivery and targeting. J Drug Target 2015; 24:294-308. [PMID: 26147085 DOI: 10.3109/1061186x.2015.1055571] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Carbon nanotubes (CNTs) have emerged as an intriguing nanotechnological tool for numerous biomedical applications including biocompatible modules for the bioactives delivery ascribed to their unique properties, such as greater loading efficiency, biocompatibility, non-immunogenicity, high surface area and photoluminescence, that make them ideal candidate in pharmaceutical and biomedical science. The design of multifunctional hybrid-CNTs for drug delivery and targeting may differ from the conventional drug delivery system. The conventional nanocarriers have few limitations, such as inappropriate availability of surface-chemical functional groups for conjugation, low entrapment/loading efficiency as well as stability as per ICH guidelines with generally regarded as safe (GRAS) prominences. The multifunctional hybrid-CNTs will sparked and open a new door for researchers, scientist of the pharmaceutical and biomedical arena. This review summarizes the vivid aspects of CNTs like characterization, supramolecular chemistry of CNTs-dendrimer, CNTs-nanoparticles, CNTs-quantum dots conjugate for delivery of bioactives, not discussed so far.
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Affiliation(s)
- Neelesh Kumar Mehra
- a Pharmaceutics Research Laboratory, Department of Pharmaceutical Sciences, Dr. Hari Singh Gour University , Sagar , India
| | - Narendra Kumar Jain
- a Pharmaceutics Research Laboratory, Department of Pharmaceutical Sciences, Dr. Hari Singh Gour University , Sagar , India
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7
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Hassan ML, Fadel SM, Moorefield C, Newkome GR. Dendronized Cellulose Nanocrystals as Templates for Preparation of ZnS and CdS Quantum Dots. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2014. [DOI: 10.1080/10601325.2014.936296] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Chronopoulos DD, Karousis N, Zhao S, Wang Q, Shinohara H, Tagmatarchis N. Photocatalytic application of nanosized CdS immobilized onto functionalized MWCNTs. Dalton Trans 2014; 43:7429-34. [DOI: 10.1039/c3dt53338g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Shaabani A, Mahyari M. PdAu Alloy Nanoparticles Encapsulated by PPI-g-MWCNTs as a Novel Catalyst for Chemoselective Hydrogenation of Alkenes Under Mild Conditions. Catal Letters 2013. [DOI: 10.1007/s10562-013-1063-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Feng W, Luo W, Feng Y. Photo-responsive carbon nanomaterials functionalized by azobenzene moieties: structures, properties and application. NANOSCALE 2012; 4:6118-34. [PMID: 22915068 DOI: 10.1039/c2nr31505j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The ability to tune the microstructures, bandgap, conductance, chemical environment and thermal storage of carbon nanomaterials such as carbon nanotubes, graphene and fullerenes by optical modulation or response is important to design and fabricate advanced optoelectronic nanodevices. This review is focused on optical control and regulation of structures, properties, interface and interaction of a new generation of photo-responsive carbon nanomaterials/azobenzene moieties (Carbon-AZO) hybrids. The optical switching properties of Carbon-AZO hybrids resulting from the photo-isomerization between trans and cis isomers are highlighted and discussed in terms of photo-energy conversion devices including switches, sensors, detectors, fuels and storage. A wide range of advanced energy conversion devices using Carbon-AZO hybrids can be developed in the future by the optimization of the chemical structure, steric conformation, electrostatic environment and functionalization of specific molecules.
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Affiliation(s)
- Wei Feng
- School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China.
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11
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Dendronization: A Useful Synthetic Strategy to Prepare Multifunctional Materials. Polymers (Basel) 2012. [DOI: 10.3390/polym4010355] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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12
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Shao L, Gao Y, Yan F. Semiconductor quantum dots for biomedicial applications. SENSORS (BASEL, SWITZERLAND) 2011; 11:11736-51. [PMID: 22247690 PMCID: PMC3252007 DOI: 10.3390/s111211736] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 12/06/2011] [Accepted: 12/13/2011] [Indexed: 12/12/2022]
Abstract
Semiconductor quantum dots (QDs) are nanometre-scale crystals, which have unique photophysical properties, such as size-dependent optical properties, high fluorescence quantum yields, and excellent stability against photobleaching. These properties enable QDs as the promising optical labels for the biological applications, such as multiplexed analysis of immunocomplexes or DNA hybridization processes, cell sorting and tracing, in vivo imaging and diagnostics in biomedicine. Meanwhile, QDs can be used as labels for the electrochemical detection of DNA or proteins. This article reviews the synthesis and toxicity of QDs and their optical and electrochemical bioanalytical applications. Especially the application of QDs in biomedicine such as delivering, cell targeting and imaging for cancer research, and in vivo photodynamic therapy (PDT) of cancer are briefly discussed.
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Affiliation(s)
- Lijia Shao
- Jiangsu Affiliated Cancer Hospital with Nanjing Medical University, Jiangsu Institute of Cancer Prevention and Cure, Nanjing 210009, China; E-Mails: (L.S.); (Y.G.)
| | - Yanfang Gao
- Jiangsu Affiliated Cancer Hospital with Nanjing Medical University, Jiangsu Institute of Cancer Prevention and Cure, Nanjing 210009, China; E-Mails: (L.S.); (Y.G.)
| | - Feng Yan
- Jiangsu Affiliated Cancer Hospital with Nanjing Medical University, Jiangsu Institute of Cancer Prevention and Cure, Nanjing 210009, China; E-Mails: (L.S.); (Y.G.)
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13
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Efficient assembly of multi-walled carbon nanotube-CdSe/ZnS quantum dot hybrids with high biocompatibility and fluorescence property. Colloids Surf B Biointerfaces 2011; 87:346-52. [DOI: 10.1016/j.colsurfb.2011.05.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 05/08/2011] [Accepted: 05/21/2011] [Indexed: 01/21/2023]
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14
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Tan A, Yildirimer L, Rajadas J, De La Peña H, Pastorin G, Seifalian A. Quantum dots and carbon nanotubes in oncology: a review on emerging theranostic applications in nanomedicine. Nanomedicine (Lond) 2011; 6:1101-14. [DOI: 10.2217/nnm.11.64] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Cancer is one of the main causes of death in the world, and according to the WHO it is projected to continue rising. Current diagnostic modalities for the detection of cancer include the use of x-rays, magnetic resonance imaging and positron emission tomography, among others. The treatment of cancer often involves the use (or combination) of chemotherapeutic drugs, radiotherapy and interventional surgery (for solid and operable tumors). The application of nanotechnology in biology and medicine is advancing rapidly. Recent evidence suggests that quantum dots (QDs) can be used to image cancer cells as they display superior fluorescent properties compared with conventional chromophores and contrast agents. In addition, carbon nanotubes (CNTs) have emerged as viable candidates for novel chemotherapeutic drug delivery-platforms. The unique photothermal properties of CNTs also allow them to be used in conjunction with near infrared radiation and lasers to thermally ablate cancer cells. Furthermore, mounting evidence indicates that it is possible to conjugate QDs to CNTs, making it possible to exploit their novel attributes in the realm of cancer theranostics (diagnostics and therapy). Here we review the current literature pertaining to the applications of QDs and CNTs in oncology, and also discuss the relevance and implications of nanomedicine in a clinical setting.
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Affiliation(s)
- Aaron Tan
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK
| | - Lara Yildirimer
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK
| | - Jayakumar Rajadas
- Laboratory of Biomaterial & Advanced Drug Delivery, Department of Neurology & Neurological Sciences, Stanford University School of Medicine, CA, USA
| | - Hugo De La Peña
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Giorgia Pastorin
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore
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Li C, Yang K, Zhang Y, Tang H, Yan F, Tan L, Xie Q, Yao S. Highly biocompatible multi-walled carbon nanotube-chitosan nanoparticle hybrids as protein carriers. Acta Biomater 2011; 7:3070-7. [PMID: 21601019 DOI: 10.1016/j.actbio.2011.05.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Revised: 04/17/2011] [Accepted: 05/04/2011] [Indexed: 01/05/2023]
Abstract
Carbon nanotube (CNT)-organic polymer hybrids have important potential applications in the immobilization of therapeutic biomolecules. Recently developed CNT-organic polymer composites require the use of organic solvents for their preparation and have limited polymer functionalization. To address these limitations, multi-walled CNT (MWCNT)-chitosan nanoparticle (CS NP) hybrids have been synthesized in situ by an ionotropic gelation process, which is extremely mild and involves the mixture of two aqueous solutions at room temperature. The MWCNT-CS NP hybrids were characterized by atomic force microscopy and thermogravimetric analysis. Under optimal conditions the CS NP can be tethered to the MWCNT surface in high density and with relatively uniform coverage. The MWCNT-CS NP hybrids show good dispersibility and stability in aqueous solutions. In order to evaluate the potential utilization of the hybrids as protein carries the cytotoxicity to HeLa cells and protein immobilization (of bovine serum albumin (BSA), used here as a model) capacity of the hybrids were investigated in detail. The results demonstrate that the MWCNT-CS NP hybrids are biocompatible at concentrations up to 100 μg mL(-1) for 24 h incubation. The MWCNT-CS NP hybrids improve the BSA immobilization efficiency 0.8 times and simultaneously decrease the cellular toxicity by about 50% compared with carboxylated MWCNT.
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16
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Bronstein LM, Shifrina ZB. Dendrimers as encapsulating, stabilizing, or directing agents for inorganic nanoparticles. Chem Rev 2011; 111:5301-44. [PMID: 21718045 DOI: 10.1021/cr2000724] [Citation(s) in RCA: 250] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Improved GFP gene transfection mediated by polyamidoamine dendrimer-functionalized multi-walled carbon nanotubes with high biocompatibility. Colloids Surf B Biointerfaces 2011; 84:206-13. [DOI: 10.1016/j.colsurfb.2011.01.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 11/26/2010] [Accepted: 01/03/2011] [Indexed: 11/23/2022]
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18
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Effective functionalization of multiwalled carbon nanotube with amphiphilic poly(propyleneimine) dendrimer carrying silver nanoparticles for better dispersability and antimicrobial activity. J Colloid Interface Sci 2011; 357:354-65. [DOI: 10.1016/j.jcis.2011.02.009] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 02/01/2011] [Accepted: 02/02/2011] [Indexed: 11/18/2022]
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Seker UOS, Zengin G, Tamerler C, Sarikaya M, Demir HV. Assembly kinetics of nanocrystals via peptide hybridization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4867-4872. [PMID: 21410195 DOI: 10.1021/la104942t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The assembly kinetics of colloidal semiconductor quantum dots (QDs) on solid inorganic surfaces is of fundamental importance for implementation of their solid-state devices. Herein an inorganic binding peptide, silica binding QBP1, was utilized for the self-assembly of nanocrystal quantum dots on silica surface as a smart molecular linker. The QD binding kinetics was studied comparatively in three different cases: first, QD adsorption with no functionalization of substrate or QD surface; second, QD adsorption on QBP1-modified surface; and, finally, adsorption of QBP1-functionalized QD on silica surface. The surface modification of QDs with QBP1 enabled 79.3-fold enhancement in QD binding affinity, while modification of a silica surface with QBP1 led to only 3.3-fold enhancement. The fluorescence microscopy images also supported a coherent assembly with correspondingly increased binding affinity. Decoration of QDs with inorganic peptides was shown to increase the amount of surface-bound QDs dramatically compared to the conventional methods. These results offer new opportunities for the assembly of QDs on solid surfaces for future device applications.
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Affiliation(s)
- Urartu Ozgur Safak Seker
- Department of Electrical and Electronics Engineering, Department of Physics and UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey.
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Jayamurugan G, Vasu KS, Rajesh YBRD, Kumar S, Vasumathi V, Maiti PK, Sood AK, Jayaraman N. Interaction of single-walled carbon nanotubes with poly(propyl ether imine) dendrimers. J Chem Phys 2011; 134:104507. [DOI: 10.1063/1.3561308] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Sun JT, Hong CY, Pan CY. Surface modification of carbon nanotubes with dendrimers or hyperbranched polymers. Polym Chem 2011. [DOI: 10.1039/c0py00356e] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The different methods for modification of carbon nanotubes with dendrimers or hyperbranched polymers are summarized, and recent development is highlighted by discussing some representative examples in detail.
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Affiliation(s)
- Jiao-Tong Sun
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Chun-Yan Hong
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Cai-Yuan Pan
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
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Zhang B, Chen Q, Tang H, Xie Q, Ma M, Tan L, Zhang Y, Yao S. Characterization of and biomolecule immobilization on the biocompatible multi-walled carbon nanotubes generated by functionalization with polyamidoamine dendrimers. Colloids Surf B Biointerfaces 2010; 80:18-25. [DOI: 10.1016/j.colsurfb.2010.05.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Revised: 05/10/2010] [Accepted: 05/11/2010] [Indexed: 11/16/2022]
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23
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Shen M, Shi X. Dendrimer-based organic/inorganic hybrid nanoparticles in biomedical applications. NANOSCALE 2010; 2:1596-610. [PMID: 20820690 DOI: 10.1039/c0nr00072h] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This review reports some recent advances on the synthesis, self-assembly, and biofunctionalization of various dendrimer-based organic/inorganic hybrid nanoparticles (NPs) for various biomedical applications, including but not limited to protein immobilization, gene delivery, and molecular diagnosis. In particular, targeted molecular imaging of cancer using dendrimer-based organic/inorganic hybrid NPs will be introduced in detail.
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Affiliation(s)
- Mingwu Shen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, China
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24
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Li S, Zheng B, Chen J, Dong S, Ma Z, Huang F, Gibson HW. A hyperbranched, rotaxane-type mechanically interlocked polymer. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24192] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Guerra J, Herrero MA. Hybrid materials based on Pd nanoparticles on carbon nanostructures for environmentally benign C-C coupling chemistry. NANOSCALE 2010; 2:1390-1400. [PMID: 20820722 DOI: 10.1039/c0nr00085j] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The combination of different nanomaterials such as metallic nanoparticles and carbon nanostructures in a new hybrid material should give rise to interesting properties that combine the advantages of each of the nanocomponents. This review highlights the latest advances in the synthetic design of these hybrid materials where carbon nanostructures act as supports as well as stabilizing agents for very reactive metallic nanoparticles. The striking applications of Pd nanoparticles anchored on the surface of carbon nanostructures in C-C coupling chemistry are analyzed. Special emphasis is placed on the stability of these materials, which is linked to their recyclability. Numerous examples are given that involve the use of these catalysts in Heck, Suzuki and Sonogashira coupling reactions.
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Affiliation(s)
- Javier Guerra
- Departamento de Química Orgánica, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
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26
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Affiliation(s)
- George R. Newkome
- Departments of Polymer Science and Chemistry, University of Akron, Akron, Ohio 44325-4717, and Department of Chemistry, Hiram College, Hiram, Ohio 44234
| | - Carol Shreiner
- Departments of Polymer Science and Chemistry, University of Akron, Akron, Ohio 44325-4717, and Department of Chemistry, Hiram College, Hiram, Ohio 44234
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27
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Meng L, Fu C, Fei Z, Lu Q, Dyson P. Photochemical Behavior of High Quantum Yield SWNTs Functionalized with Anthracene Salts. Chem Asian J 2010; 5:1988-91. [DOI: 10.1002/asia.201000236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Karousis N, Tagmatarchis N, Tasis D. Current Progress on the Chemical Modification of Carbon Nanotubes. Chem Rev 2010; 110:5366-97. [DOI: 10.1021/cr100018g] [Citation(s) in RCA: 1038] [Impact Index Per Article: 74.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Nikolaos Karousis
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35 Athens, Greece
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35 Athens, Greece
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29
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Li X, Jia Y, Wei J, Zhu H, Wang K, Wu D, Cao A. Solar cells and light sensors based on nanoparticle-grafted carbon nanotube films. ACS NANO 2010; 4:2142-2148. [PMID: 20222675 DOI: 10.1021/nn901563y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Carbon nanotubes show great potential in developing solar cells with enhanced power conversion efficiency, yet the device stability has not been thoroughly studied. Here, we show how the interaction between components in a nanotube-based hybrid solar cell could cause a significant change in output voltage and fill factor, resulting in photoinduced degradation in device performance. We functionalized carbon nanotubes with CdS nanoparticles to make hybrid films and deposited these films onto silicon substrates to construct solar cells with efficiencies up to 1.4%. The I-V characteristics show reversible change in response to light illumination, suggesting potential applications as visible-light sensors. The fill factor and open-circuit voltage gradually decrease under continuous illumination, inversely proportional to the incident light energy within a considerable range up to 60 J. The unique photoresponse is attributed to a charge-transfer process between nanotubes and nanoparticles under excitation and to change in series resistance in the solar cells.
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Affiliation(s)
- Xianglong Li
- Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA
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30
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Feng M, Zhan H, Miao L. Facile assembly of cadmium sulfide quantum dots on titanate nanobelts for enhanced nonlinear optical properties. ACS APPLIED MATERIALS & INTERFACES 2010; 2:1129-35. [PMID: 20423131 DOI: 10.1021/am100003p] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A facile route to assemble cadmium sulfide (CdS) quantum dots (QDs) uniformly on the surface of titanate nanobelts (TNBs) through electrostatic interactions is demonstrated. The photophysical properties of the resulting TNB-CdS nanostructured composite, including optical limiting properties, were studied using ultraviolet-visible absorption spectroscopy, photoluminescence spectroscopy, and the open aperture Z-scan technique in the nanosecond regime using a laser with a wavelength of 532 nm. The linear and nonlinear optical properties of this composite nanostructure were strongly influenced by a possible charge/energy transfer process between the QDs and TNBs. The as-prepared TNB-CdS composite offers an optical limiting effect that is superior to that of unmodified CdS QDs and TNBs. The main contributors to the enhanced optical limiting effect in the TNB-CdS composite were a combination of nonlinear scattering and increased nonlinear absorption resulting from efficient charge/energy transfer at the CdS/TNB interface.
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Affiliation(s)
- Miao Feng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, People's Republic of China
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31
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Abstract
Dendrimers and nanotubes (particularly carbon nanotubes (CNTs)) are two types of nano-objects which have met independently a large success within the scientific community. Surprisingly, their association has been poorly studied up to now, despite some original properties recently reported and that will be emphasized in this tutorial review. One can name as a few, the elaboration of single-walled carbon nanotubes from dendrimers, CNTs functionalised with dendrimers displaying field effect transistor properties and/or used as biosensors, and modified biological properties (either enhanced biocompatibility or enhanced antimicrobial activity). However, not all the nanotubes are carbon nanotubes, and original properties were also reported for dendrimers associated with non-CNTs, such as the elaboration of specific nano-filters and of highly efficient and reusable catalysts. Furthermore, non-CNTs constituted of dendrimers, particularly those obtained by layer-by-layer deposition of positively and negatively charged dendrimers associated with quantum dots display an excellent detection limit for DNA hybridization (10 fM).
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Affiliation(s)
- Anne-Marie Caminade
- CNRS; LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, F-31077 Toulouse cedex 4, France.
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32
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Herrero MA, Guerra J, Myers VS, Gómez MV, Crooks RM, Prato M. Gold dendrimer encapsulated nanoparticles as labeling agents for multiwalled carbon nanotubes. ACS NANO 2010; 4:905-912. [PMID: 20112960 DOI: 10.1021/nn901729d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this paper, we report the functionalization of the surface of multiwalled carbon nanotubes (MWNTs) with Au dendrimer encapsulated nanoparticles (DENs). The results show that, when pristine MWNTs having hydrophobic surfaces are exposed to DENs, the dendrimers aggregate on the MWNT surface. However, when the MWNTs are oxidized in acid prior to exposure to DENs, well-dispersed submonolayer coverages of Au nanoparticles are observed on the MWNT surface. This suggests that acid-induced debundling of the nanotubes is an essential prerequisite for attachment of nearly monodisperse DENs. Electron microscopy and NMR spectroscopy confirm that the structures of the DENs and dendrimers are retained after immobilization on the surface of acid-functionalized MWNTs.
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Affiliation(s)
- M Antonia Herrero
- Departamento de Quimica Organica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
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33
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Yang Y, Tsui CP, Tang CY, Qiu S, Zhao Q, Cheng X, Sun Z, Li RKY, Xie X. Functionalization of carbon nanotubes with biodegradable supramolecular polypseudorotaxanes from grafted-poly(ε-caprolactone) and α-cyclodextrins. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2009.10.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Li X, Jia Y, Cao A. Tailored single-walled carbon nanotube--CdS nanoparticle hybrids for tunable optoelectronic devices. ACS NANO 2010; 4:506-512. [PMID: 20041712 DOI: 10.1021/nn901757s] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The integration of organic and inorganic building blocks into novel nanohybrids is an important tool to exploit innovative materials with desirable functionalities. For this purpose, carbon nanotube--nanoparticle nanoarchitectures are intensively studied. We report here an efficient noncovalent chemical route to density-controllably and uniformly assemble single-walled carbon nanotubes with CdS nanoparticles. The methodology not only promises the resulting hybrids will be solution-processable but also endows the hybrids with distinct optoelectronic properties including tunable photoresponse mediated by amine molecules. On the basis of these merits, reliable thin-film photoswitches and light-driven chemical sensors are demonstrated, which highlights the potential of tailored hybrids in the development of new tunable optoelectronic devices and sensors.
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Affiliation(s)
- Xianglong Li
- Department of Mechanical Engineering, University of Hawaii, Honolulu, Hawaii 96822, USA.
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35
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Chen X, Huang X, Kong L, Guo Z, Fu X, Li M, Liu J. Walnut-like CdS micro-particles/single-walled carbon nanotube hybrids: one-step hydrothermal route to synthesis and their properties. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b917558j] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Bronstein LM, Shifrina ZB. Nanoparticles in dendrimers: From synthesis to application. ACTA ACUST UNITED AC 2009. [DOI: 10.1134/s1995078009090031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Si HY, Liu CH, Xu H, Wang TM, Zhang HL. Shell-Controlled Photoluminescence in CdSe/CNT Nanohybrids. NANOSCALE RESEARCH LETTERS 2009; 4:1146-52. [PMID: 20596321 PMCID: PMC2894251 DOI: 10.1007/s11671-009-9373-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2009] [Accepted: 06/03/2009] [Indexed: 05/29/2023]
Abstract
A new type of nanohybrids containing carbon nanotubes (CNTs) and CdSe quantum dots (QDs) was prepared using an electrostatic self-assembly method. The CdSe QDs were capped by various mercaptocarboxylic acids, including thioglycolic acid (TGA), dihydrolipoic acid (DHLA) and mercaptoundecanoic acid (MUA), which provide shell thicknesses of ~5.2, 10.6 and 15.2 Å, respectively. The surface-modified CdSe QDs are then self-assembled onto aridine orange-modified CNTs via electrostatic interaction to give CdSe/CNT nanohybrids. The photoluminescence (PL) efficiencies of the obtained nanohybrids increase significantly with the increase of the shell thickness, which is attributed to a distance-dependent photo-induced charge-transfer mechanism. This work demonstrates a simple mean for fine tuning the PL properties of the CdSe/CNT nanohybrids and gains new insights to the photo-induced charge transfer in such nanostructures.
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Affiliation(s)
- Hua-Yan Si
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 730000, Lanzhou, China.
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38
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Wu HX, Cao WM, Chen Q, Liu MM, Qian SX, Jia NQ, Yang H, Yang SP. Metal sulfide coated multiwalled carbon nanotubes synthesized by an in situ method and their optical limiting properties. NANOTECHNOLOGY 2009; 20:195604. [PMID: 19420643 DOI: 10.1088/0957-4484/20/19/195604] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A metal sulfide such as ZnS, CdS, Ag(2)S or PbS was coated on the sidewall of multiwalled carbon nanotubes (MWCNTs) by an in situ wet chemical synthesis approach via noncovalent functionalization of MWCNTs with a polyelectrolyte (polyethylenimine or poly(diallyldimethylammonium chloride)) without causing significant electronic and structural modification of the carbon nanotubes. Extensive characterizations of the fabricated nanocomposites have been performed using x-ray diffraction, transmission electron microscopy (TEM), high resolution TEM, energy dispersive x-ray spectroscopy, selected area electron diffraction, thermal gravimetric analysis, Fourier transform IR spectra, UV-vis spectra and x-ray photoelectron spectroscopy. The coating layers were composed of metal sulfide nanoparticles with a mean size of less than 10 nm. The optical limiting property measurements for some metal sulfide coated MWCNTs were carried out by the open-aperture z-scan technique. The results demonstrate that the samples suspended in water showed optical limiting behavior better than that of purified MWCNTs.
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Affiliation(s)
- Hui-Xia Wu
- Department of Chemistry, Shanghai Normal University, Shanghai, People's Republic of China
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39
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Wang CF, Cheng YP, Wang JY, Zhang D, Hou LR, Chen L, Chen S. Controllable fabrication of nanocrystal-polymer hybrids via the catalytic chain transfer polymerization process. Colloid Polym Sci 2009. [DOI: 10.1007/s00396-009-2037-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Mountrichas G, Sandanayaka ASD, Economopoulos SP, Pispas S, Ito O, Hasobe T, Tagmatarchis N. Photoinduced electron transfer in aqueous carbon nanotube/block copolymer/CdS hybrids: application in the construction of photoelectrochemical cells. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b914914g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Ovits O, Tel-Vered R, Baravik I, Wilner OI, Willner I. Photoelectrochemical cells based on bis-aniline-crosslinked CdS nanoparticle–carbon nanotube matrices associated with electrodes. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b908609a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Peng X, Chen J, Misewich JA, Wong SS. Carbon nanotube–nanocrystal heterostructures. Chem Soc Rev 2009; 38:1076-98. [DOI: 10.1039/b811424m] [Citation(s) in RCA: 224] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Zeng Y, Tang C, Wang H, Jiang J, Tian M, Shen G, Yu R. A novel density-tunable nanocomposites of CdTe quantum dots linked to dendrimer-tethered multi-wall carbon nanotubes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:966-972. [PMID: 18023607 DOI: 10.1016/j.saa.2007.10.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2007] [Accepted: 10/03/2007] [Indexed: 05/25/2023]
Abstract
A novel nanocomposite of CdTe-PAMAM-MWNT was synthesized by covalently linking CdTe quantum dots (QDs) onto highly water-soluble multi-wall carbon nanotubes (MWNTs) functionalized with dendritic poly(amidoamine) (PAMAM). The IR, UV-vis and TEM methods has been used for the characterization of the composites. A facile method for controlling the density of QDs in the composite by simply changing the ratio of CdTe QDs/PAMAM-MWNT, as was verified by the TEM images. The experiments revealed that PAMAM and PAMAM-MWNT, once covalently linked with CdTe QDs, had remarkable effect on their fluorescence property. The fluorescence intensity of the CdTe-PAMAM hybrid was substantially enhanced as a compared to that of QDs, and the fluorescence was quenched greatly when QDs reacted with PAMAM-MWNT. The experimentally observed phenomena indicate that electron and energy transfer took place efficiently between CdTe QDs, PAMAM and MWNTs in the novel composite. These nanocomposits might hold great potential in photoelectron device and biotechnology applications.
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Affiliation(s)
- Yunlong Zeng
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, 410081 Changsha, China.
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44
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Tsuboi T, Takaguchi Y, Tsuboi S. Preparation and photosensitizing property of novel Cd10S16molecular cluster dendrimer. Chem Commun (Camb) 2008:76-8. [DOI: 10.1039/b713680c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Newkome GR, Shreiner CD. Poly(amidoamine), polypropylenimine, and related dendrimers and dendrons possessing different 1→2 branching motifs: An overview of the divergent procedures. POLYMER 2008. [DOI: 10.1016/j.polymer.2007.10.021] [Citation(s) in RCA: 313] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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46
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Woo S, Lee Y, Sunkara V, Cheedarala RK, Shin HS, Choi HC, Park JW. "Fingertip"-guided noncovalent functionalization of carbon nanotubes by dendrons. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:11373-11376. [PMID: 17918872 DOI: 10.1021/la701968y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Noncovalent functionalization of carbon nanotubes (CNTs) by dendrons was demonstrated. Certain types of dendrons successfully functionalized CNT surfaces through the noncovalent interactions between the peripheries of the dendrons and the sidewalls of CNTs. Dendrons have a unique anisotropic shape and an orthogonal functional group at their apex, and thus can generate a certain spacing between the functional groups upon immobilization on surfaces. Atomic force microscope (AFM) imaging, dispersion experiments, and MicroRaman spectroscopy were employed for the characterization of the functionalization. The binding was found to be governed by the chemical nature of the terminal groups, namely, the "fingertips", through a comparison study on the adsorption efficiency of the dendron analogs. Functional groups such as the carboxylic acid group and the benzyl amide group were effective for the cooperative binding. AFM analysis showed that the average spacing generated by the dendrons was 14-15 nm at a particular adsorption condition. Assembling streptavidin on the tubes through the dendrons and biotin confirmed the realization of the regulated spacing as well as the elimination of unwanted aggregation. The noncovalent functionalization of CNTs by a dendron can be a new approach toward sensible nanobiodevices, not only by introducing biomolecular probes on CNTs without disruption of the electronic network of the tubes, but also by providing the immobilized probe molecules with a space ample enough to minimize steric hindrance for the unhindered interaction with their target species.
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Affiliation(s)
- Sungwook Woo
- Department of Chemistry, Pohang University of Science and Technology, San 31, Hyoja-Dong, Pohang, Korea 790-784
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47
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Mountrichas G, Pispas S, Tagmatarchis N. Aqueous carbon-nanotube-amphiphilic-block-copolymer nanoensembles: towards realization of charge-transfer processes with semiconductor quantum dots. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2007; 3:404-7. [PMID: 17245781 DOI: 10.1002/smll.200600476] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Affiliation(s)
- Grigoris Mountrichas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens, Greece
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48
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49
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Hwang SH, Shreiner CD, Moorefield CN, Newkome GR. Recent progress and applications for metallodendrimers. NEW J CHEM 2007. [DOI: 10.1039/b612656c] [Citation(s) in RCA: 188] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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50
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Georgakilas V, Gournis D, Tzitzios V, Pasquato L, Guldi DM, Prato M. Decorating carbon nanotubes with metal or semiconductor nanoparticles. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b700857k] [Citation(s) in RCA: 562] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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