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Chen Z, Li Y, Qin H, Yang X, Cao W. A dual-mechanism-driven electrochemiluminescence aptasensor for sensitive detection of β-amyloid peptides. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:1739-1746. [PMID: 35468173 DOI: 10.1039/d2ay00410k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
β-Amyloid (Aβ) peptides can bind both Cu2+ and heme cofactors simultaneously to form heme-Cu2+-Aβ complexes, which are proposed to generate toxic partially reduced oxygen species (PROS, e.g., H2O2) and play a vital role in Alzheimer's disease (AD). In this paper, a competitive dual-mechanism-driven electrochemiluminescence (ECL) aptasensor integrating the synergistic enhancement and steric hindrance effect was described for Aβ detection. Specifically, graphite carbon nitride (g-C3N4) as an effective ECL luminescent substrate and Au nanoparticles were sequentially assembled on the Au electrode surface, and then a thiol-modified aptamer for capturing Aβ peptide was attached to the surface of the electrode through the Au-S bond. Aβ peptides were simultaneously incubated with heme and Cu2+, and the forming heme-Cu2+-Aβ complexes were subsequently anchored on the electrode through the specific recognition between the target Aβ and the aptamer. When the concentration of the target Aβ is low, the synergistic enhancement effect arising from K2S2O8 with in situ generated H2O2 is predominant, resulting in an increase in the ECL signal of g-C3N4. In contrast, when the concentration of Aβ is high, the steric hindrance effect generated from heme-Cu2+-Aβ complexes is dominant, leading to a decrease in the ECL signal. The present sensor exhibits a favorable linear response for the detection of Aβ with a relatively low detection limit of 0.24 pM, and provides a more sensitive and selective platform for bioanalysis.
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Affiliation(s)
- Zixuan Chen
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| | - Yinan Li
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| | - Haixin Qin
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| | - Xiaoyan Yang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| | - Wei Cao
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
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2
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Malhotra N, Lee JS, Liman RAD, Ruallo JMS, Villaflores OB, Ger TR, Hsiao CD. Potential Toxicity of Iron Oxide Magnetic Nanoparticles: A Review. Molecules 2020; 25:E3159. [PMID: 32664325 PMCID: PMC7397295 DOI: 10.3390/molecules25143159] [Citation(s) in RCA: 171] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 12/25/2022] Open
Abstract
The noteworthy intensification in the development of nanotechnology has led to the development of various types of nanoparticles. The diverse applications of these nanoparticles make them desirable candidate for areas such as drug delivery, coasmetics, medicine, electronics, and contrast agents for magnetic resonance imaging (MRI) and so on. Iron oxide magnetic nanoparticles are a branch of nanoparticles which is specifically being considered as a contrast agent for MRI as well as targeted drug delivery vehicles, angiogenic therapy and chemotherapy as small size gives them advantage to travel intravascular or intracavity actively for drug delivery. Besides the mentioned advantages, the toxicity of the iron oxide magnetic nanoparticles is still less explored. For in vivo applications magnetic nanoparticles should be nontoxic and compatible with the body fluids. These particles tend to degrade in the body hence there is a need to understand the toxicity of the particles as whole and degraded products interacting within the body. Some nanoparticles have demonstrated toxic effects such inflammation, ulceration, and decreases in growth rate, decline in viability and triggering of neurobehavioral alterations in plants and cell lines as well as in animal models. The cause of nanoparticles' toxicity is attributed to their specific characteristics of great surface to volume ratio, chemical composition, size, and dosage, retention in body, immunogenicity, organ specific toxicity, breakdown and elimination from the body. In the current review paper, we aim to sum up the current knowledge on the toxic effects of different magnetic nanoparticles on cell lines, marine organisms and rodents. We believe that the comprehensive data can provide significant study parameters and recent developments in the field. Thereafter, collecting profound knowledge on the background of the subject matter, will contribute to drive research in this field in a new sustainable direction.
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Affiliation(s)
- Nemi Malhotra
- Department of Biomedical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan
| | - Jiann-Shing Lee
- Department of Applied Physics, National Pingtung University, Pingtung 90007, Taiwan
| | | | | | - Oliver B Villaflores
- Department of Biochemistry, Faculty of Pharmacy and Research Center for Natural and Applied Sciences, University of Santo Tomas, Manila 1015, Philippines
| | - Tzong-Rong Ger
- Department of Biomedical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan
| | - Chung-Der Hsiao
- Department of Bioscience Technology, Chung Yuan Christian University, Chung-Li 32023, Taiwan
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 32023, Taiwan
- Center for Nanotechnology, Chung Yuan Christian University, Chung-Li 32023, Taiwan
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3
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Liu M, Fang L, Li Y, Gong M, Xu A, Deng Z. "Flash" preparation of strongly coupled metal nanoparticle clusters with sub-nm gaps by Ag + soldering: toward effective plasmonic tuning of solution-assembled nanomaterials. Chem Sci 2016; 7:5435-5440. [PMID: 30034682 PMCID: PMC6021751 DOI: 10.1039/c6sc01407k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 05/01/2016] [Indexed: 01/09/2023] Open
Abstract
Noble metal nanoparticle oligomers are important in applications including plasmonics, catalysis, and molecular sensing. These nanostructural units featuring abundant inter-particle junctions are helpful for a physical/chemical understanding of structure-activity relationships of self-assembled metamaterials. A simple, rapid, and potentially general strategy for the preparation of monodisperse nanoparticle clusters in a homogeneous solution is highly desired for fundamental research toward liquid metamaterials and chemical/biological applications, but this is however very challenging. Here we report an Ag+ soldering strategy to prepare strongly coupled plasmonic (Au) and catalytic (Pt, Au@Pd (Au core with a Pd shell)) nanoparticle clusters almost instantly (<1 min) in a solution without special synthetic efforts, complicated surface decorations, or structure-directing templates. The resulting clusters are isolatable by agarose gel electrophoresis, resulting in mechanically stable products in high purity. The optical extinctions of Au nanodimers (the simplest and most basic form of a coupled structure) exhibit prominent longitudinal plasmonic coupling for nanoparticles down to 13.3 nm in diameter. Theoretical simulations attribute the strong coupling to the existence of a sub-nm gap (c.a. 0.76 nm) between soldered particles, suggesting an ideal (stable, soluble, monodisperse, and weakly passivated) substrate for surface enhanced Raman scattering (SERS) applications.
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Affiliation(s)
- Miao Liu
- CAS Key Laboratory of Soft Matter Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology , Department of Chemistry , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Lingling Fang
- CAS Key Laboratory of Soft Matter Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology , Department of Chemistry , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Yulin Li
- CAS Key Laboratory of Soft Matter Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology , Department of Chemistry , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Ming Gong
- Engineering and Materials Science Experiment Center , University of Science and Technology of China , Hefei , Anhui 230027 , China
| | - An Xu
- Key Laboratory of Ion Beam Bioengineering , Hefei Institutes of Physical Science , Chinese Academy of Sciences , Hefei , Anhui 230031 , China
| | - Zhaoxiang Deng
- CAS Key Laboratory of Soft Matter Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology , Department of Chemistry , University of Science and Technology of China , Hefei , Anhui 230026 , China .
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4
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Photometric and visual detection of Cr(VI) using gold nanoparticles modified with 1,5-diphenylcarbazide. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1777-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Leung KCF, Xuan S. Noble Metal-Iron Oxide Hybrid Nanomaterials: Emerging Applications. CHEM REC 2016; 16:458-72. [DOI: 10.1002/tcr.201500259] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Indexed: 02/05/2023]
Affiliation(s)
- Ken Cham-Fai Leung
- Department of Chemistry Partner State Key Laboratory of Environmental and Biological Analysis; The Hong Kong Baptist University Kowloon Tong Kowloon Hong Kong S. A. R. (P. R. China) and Institute of Molecular Functional Materials University Grants Committee; Hong Kong S. A. R. (P. R. China)
| | - Shouhu Xuan
- CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics; University of Science and Technology of China; Hefei 230026 (P. R. China)
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Wang H, Adeleye AS, Huang Y, Li F, Keller AA. Heteroaggregation of nanoparticles with biocolloids and geocolloids. Adv Colloid Interface Sci 2015; 226:24-36. [PMID: 26233495 DOI: 10.1016/j.cis.2015.07.002] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 07/08/2015] [Accepted: 07/08/2015] [Indexed: 10/23/2022]
Abstract
The application of nanoparticles has raised concern over the safety of these materials to human health and the ecosystem. After release into an aquatic environment, nanoparticles are likely to experience heteroaggregation with biocolloids, geocolloids, natural organic matter (NOM) and other types of nanoparticles. Heteroaggregation is of vital importance for determining the fate and transport of nanoparticles in aqueous phase and sediments. In this article, we review the typical cases of heteroaggregation between nanoparticles and biocolloids and/or geocolloids, mechanisms, modeling, and important indicators used to determine heteroaggregation in aqueous phase. The major mechanisms of heteroaggregation include electric force, bridging, hydrogen bonding, and chemical bonding. The modeling of heteroaggregation typically considers DLVO, X-DLVO, and fractal dimension. The major indicators for studying heteroaggregation of nanoparticles include surface charge measurements, size measurements, observation of morphology of particles and aggregates, and heteroaggregation rate determination. In the end, we summarize the research challenges and perspective for the heteroaggregation of nanoparticles, such as the determination of αhetero values and heteroaggregation rates; more accurate analytical methods instead of DLS for heteroaggregation measurements; sensitive analytical techniques to measure low concentrations of nanoparticles in heteroaggregation systems; appropriate characterization of NOM at the molecular level to understand the structures and fractionation of NOM; effects of different types, concentrations, and fractions of NOM on the heteroaggregation of nanoparticles; the quantitative adsorption and desorption of NOM onto the surface of nanoparticles and heteroaggregates; and a better understanding of the fundamental mechanisms and modeling of heteroaggregation in natural water which is a complex system containing NOM, nanoparticles, biocolloids and geocolloids.
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7
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Wu S, Tan SY, Ang CY, Nguyen KT, Li M, Zhao Y. An imine-based approach to prepare amine-functionalized Janus gold nanoparticles. Chem Commun (Camb) 2015; 51:11622-5. [PMID: 26097920 DOI: 10.1039/c5cc03582a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An imine-based approach was developed to prepare Janus gold nanoparticles (Janus AuNPs) having amine functionality on one patch of the surface and a polyethylene glycol unit on the other. This unique technique features covalent bonding as the force to immobilize AuNPs on the template, enabling direct modification of AuNPs in both water and organic solvents. Colloidal clusters were then obtained via electrostatic assembly of these Janus AuNPs with citrate stabilized AuNPs or AgNPs.
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Affiliation(s)
- Shaojue Wu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
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Leung KCF, Sham KWY, Chak CP, Lai JMY, Lee SF, Wáng YXJ, Cheng CHK. Evaluation of biocompatible alginate- and deferoxamine-coated ternary composites for magnetic resonance imaging and gene delivery into glioblastoma cells. Quant Imaging Med Surg 2015; 5:382-91. [PMID: 26029641 PMCID: PMC4426123 DOI: 10.3978/j.issn.2223-4292.2015.03.12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/10/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND This paper describes comparative studies in cytotoxicities, magnetic resonance imaging (MRI), and gene delivery into glioblastoma U87MG or U138MG cells with ternary composites that are consist of superparamagnetic iron oxide (SPIO) nanoparticles (NPs) (size: 8-10 nm) with different surface coatings, circular plasmid DNA (pDNA) (~4 kb) equipped with fluorescent/luminescent probe, and branched polyethylenimine (25 kDa, PDI 2.5). METHODS Three types of SPIO-NPs were used, including: (I) naked iron oxide NPs with Fe-OH surface group (Bare-NP); (II) iron oxide NPs with a coating of alginate (Alg-NPs); and (III) iron oxide NPs with a coating of deferoxamine (Def-NPs). By tuning the polyethylenimine (PEI)/NP ratios and with a fixed DNA amount, different ternary composites were employed for NP/gene transfection into glioblastoma U87MG or U138MG cells, which were then characterized by Prussian blue staining, in vitro MRI, green fluorescence protein (GFP) fluorescence and luciferase assay. RESULTS Among the composites prepared, 0.2 ng PEI/0.5 µg DNA/1.0 µg Bare-NP ternary composite possessed the best cellular uptake efficiency of NP to the cytoplasm, following the trend Bare-NP > Alg-NP > Def-NP. This observation was consistent to the MRI assessments with in vitro T 2 relaxivity (r 2) values of 46.0, 35.5, and 23.7 s(-1)·µM(-1)·Fe, respectively. For cellular uptake efficiency of the pDNA, all variations of PEI/NP ratios of the composites did not yield significant differences. However, cellular uptake efficiencies of pDNA in the ternary composites in U138MG cells were generally higher than that of U87MG cells by an order of magnitude. Exceptionally, the ternary composite 0.2 ng PEI/0.5 µg DNA/1.0 µg Bare-NP possessed a lowered luciferase activity RLU for gene expression in U138MG cells. A total of 0.2 ng PEI/0.5 µg DNA/0.1 µg Bare-NP would be uptaken to the cell nucleus with the highest luciferase activity. A working concentration range of PEI with at least 15% higher cell viabilities than lipofectamine was 0.1 to 0.2 ng/well. The cytotoxicities became significant when 0.5 ng/well PEI was present in the ternary composites. CONCLUSIONS The as-prepared composites offer potential biomedical applications in simultaneous gene delivery, imaging contrast enhancement, and metabolism study.
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9
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Controlled heteroaggregation of two types of nanoparticles in an aqueous suspension. J Colloid Interface Sci 2015; 438:235-243. [DOI: 10.1016/j.jcis.2014.09.086] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 09/24/2014] [Accepted: 09/30/2014] [Indexed: 01/13/2023]
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10
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Abstract
CONSPECTUS: For device miniaturization, nanotechnology follows either the "top-down" approach scaling down existing larger-scale devices or the "bottom-up' approach assembling the smallest possible building blocks to functional nanoscale entities. For synthetic nanodevices, self-assembly on surfaces is a superb method to achieve useful functions and enable their interactions with the surrounding world. Consequently, adaptability and responsiveness to external stimuli are other prerequisites for their successful operation. Mechanically interlocked molecules such as rotaxanes and catenanes, and their precursors, that is, molecular switches and supramolecular switches including pseudorotaxanes, are molecular machines or prototypes of machines capable of mechanical motion induced by chemical signals, biological inputs, light or redox processes as the external stimuli. Switching of these functional host-guest systems on surfaces becomes a fundamental requirement for artificial molecular machines to work, mimicking the molecular machines in nature, such as proteins and their assemblies operating at dynamic interfaces such as the surfaces of cell membranes. Current research endeavors in material science and technology are focused on developing either a new class of materials or materials with novel/multiple functionalities by shifting host-guest chemistry from solution phase to surfaces. In this Account, we present our most recent attempts of building monolayers of rotaxanes/pseudorotaxanes on surfaces, providing stimuli-induced macroscopic effects and further understanding on the switchable host-guest systems at interfaces. Biocompatible versions of molecular machines based on synthetic macrocycles, such as cucurbiturils, pillararenes, calixarenes, and cyclodextrins, have been employed to form self-assembled monolayers of gates on the surfaces of mesoporous silica nanoparticles to regulate the controlled release of cargo/drug molecules under a range of external stimuli, such as light, pH variations, competitive binding, and enzyme. Rotaxanes have also been assembled onto the surfaces of gold nanodisks and microcantilevers to realize active molecular plasmonics and synthetic molecular actuators for device fabrication and function. Pillararenes have been successfully used to control and aid the synthesis of gold nanoparticles, semiconducting quantum dots, and magnetic nanoparticles. The resulting organic-inorganic hydrid nanomaterials have been successfully used for controlled self-assembly, herbicide sensing and detection, pesticide removal, and so forth, taking advantage of the selective binding of pillarenes toward target molecules. Cyclodextrins have also been successfully functionalized onto the surface of gold nanoparticles to serve as recycling extractors for C60. Many interesting prototypes of nanodevices based on synthetic macrocycles and their host-guest chemistry have been constructed and served for different potential applications. This Account will be a summary of the efforts made mainly by us, and others, on the host-guest chemistry of synthetic macrocyclic compounds on the surfaces of different solid supports.
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Affiliation(s)
- Ying-Wei Yang
- State Key Laboratory Of Supramolecular
Structure And Materials, College Of Chemistry, Jilin University, 2699
Qianjin Street, Changchun 130012, P. R. China
| | - Yu-Long Sun
- State Key Laboratory Of Supramolecular
Structure And Materials, College Of Chemistry, Jilin University, 2699
Qianjin Street, Changchun 130012, P. R. China
| | - Nan Song
- State Key Laboratory Of Supramolecular
Structure And Materials, College Of Chemistry, Jilin University, 2699
Qianjin Street, Changchun 130012, P. R. China
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11
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Ho WKW, Lee SF, Wong CH, Zhu XM, Kwan CS, Chak CP, Mendes PM, Cheng CHK, Leung KCF. Type III-B rotaxane dendrimers. Chem Commun (Camb) 2014; 49:10781-3. [PMID: 24081452 DOI: 10.1039/c3cc46759g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Type III-B first generation [3]rotaxane and second generation [4]rotaxane dendrimers have been synthesized via (1) a modified copper-catalyzed alkyne-azide cycloaddition (CuAAC), (2) Glaser-Hay's acetylenic oxidative homo-coupling, and (3) amide formation. The dendron does not reveal obvious cytotoxicities in L929 fibroblast cells. The rotaxane dendrimers can capture ammonia and are switchable both in solution and on surfaces.
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Affiliation(s)
- Watson K-W Ho
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
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12
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Iqbal P, Rawson F, Ho WKW, Lee SF, Leung KCF, Wang X, Beri A, Preece JA, Ma J, Mendes PM. Surface molecular tailoring using pH-switchable supramolecular dendron-ligand assemblies. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6264-74. [PMID: 24742280 PMCID: PMC4072702 DOI: 10.1021/am501613c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 04/17/2014] [Indexed: 05/20/2023]
Abstract
The rational design of materials with tailored properties is of paramount importance for a wide variety of biological, medical, electronic and optical applications. Here we report molecular level control over the spatial distribution of functional groups on surfaces utilizing self-assembled monolayers (SAMs) of pH-switchable surface-appended pseudorotaxanes. The supramolecular systems were constructed from a poly(aryl ether) dendron-containing a dibenzo[24]crown-8 (DB24C8) macrocycle and a thiol ligand-containing a dibenzylammonium recognition site and a fluorine end group. The dendron establishes the space (dendritic effect) that each pseudorotaxane occupies on the SAM. Following SAM formation, the dendron is released from the surface by switching off the noncovalent interactions upon pH stimulation, generating surface materials with tailored physical and chemical properties.
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Affiliation(s)
- Parvez Iqbal
- School of Chemical Engineering and School of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Frankie
J. Rawson
- Laboratory
of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
| | - Watson K.-W. Ho
- Department
of Chemistry, The Chinese University of
Hong Kong, Shatin NT, Hong Kong SAR
| | - Siu-Fung Lee
- Department
of Chemistry, The Chinese University of
Hong Kong, Shatin NT, Hong Kong SAR
| | - Ken Cham-Fai Leung
- Department
of Chemistry, The Chinese University of
Hong Kong, Shatin NT, Hong Kong SAR
- Department
of Chemistry and Institute of Creativity and Institute of Molecular Functional Materials, University Grants Committee, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR
| | - Xingyong Wang
- School
of
Chemistry and Chemical Engineering, Nanjing
University, Nanjing 210093, P. R. China
| | - Akash Beri
- School of Chemical Engineering and School of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Jon A. Preece
- School of Chemical Engineering and School of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Jing Ma
- School
of
Chemistry and Chemical Engineering, Nanjing
University, Nanjing 210093, P. R. China
| | - Paula M. Mendes
- School of Chemical Engineering and School of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
- E-mail: . Tel: +(121) 414-5343
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Zhou T, Dong B, Qi H, Lau HK, Li CY. One-step formation of responsive "dumbbell" nanoparticle dimers via quasi-two-dimensional polymer single crystals. NANOSCALE 2014; 6:4551-4554. [PMID: 24667970 DOI: 10.1039/c4nr00501e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present a facile approach to synthesize "dumbbell" nanoparticle dimers via one-step coupling of nanoparticles and quasi-two-dimensional polymer single crystals. These dimers exhibit responsive properties enabled by flexible polymeric linkers.
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Affiliation(s)
- Tian Zhou
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
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14
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Wang N, Zhang X, Zheng W, Ouyang D, Yang R. Fabrication and morphology control of the electrostatic self-assembled system containing porphyrin electrolytes and sulfonated fullerene derivatives. Supramol Chem 2014. [DOI: 10.1080/10610278.2014.909043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ning Wang
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, P.R. China
| | - Xiaona Zhang
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, P.R. China
| | - Wei Zheng
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, P.R. China
| | - Dan Ouyang
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, P.R. China
- University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Renqiang Yang
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, P.R. China
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Sander F, Fluch U, Hermes JP, Mayor M. Dumbbells, trikes and quads: organic-inorganic hybrid nanoarchitectures based on "clicked" gold nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:349-359. [PMID: 23881793 DOI: 10.1002/smll.201300839] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 05/24/2013] [Indexed: 06/02/2023]
Abstract
The controlled assembly of gold nanoparticles in terms of the spatial arrangement and number of particles is essential for many future applications like electronic devices, sensors and labeling. Here an approach is presented to build up oligomers of mono functionalized gold nanoparticles by the use of 1,3-bipolar azide alkyne cycloaddition click chemistry. The gold nanoparticles of 1.3 nm diameter are stabilized by one dendritic thioether ligand comprising an alkyne function. Together with di-, tri- and tetra-azide linker molecules the gold nanoparticle can be covalently coupled by a wet chemical protocol. The reaction is tracked with IR and UV-vis spectroscopy and the yielded organic-inorganic hybrid structures are analyzed by transmission electron microscopy. To evaluate the success of this click chemistry reaction statistical analysis of the formed oligomers is performed. The geometric and spatial arrangements of the found oligomers match perfectly the calculated values for the used linker molecules. Dimers, trimers and tetramers could be identified after the reaction with the corresponding linker molecule. The results of this model reaction suggest that the used click chemistry protocol is working well with mono functionalized gold nanoparticles.
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Affiliation(s)
- Fabian Sander
- University of Basel, Department of Chemistry, St. Johannsring 19, CH-4056, Basel, Switzerland
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16
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Liu H, Wang K, Zhang L, Qian X, Li Y, Li Y. Selectively recognizing organic semiconducting molecules on solid state molecular cages based on ZnOTCPP. Dalton Trans 2014; 43:432-8. [DOI: 10.1039/c3dt51609a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Leung KCF, Wong CH, Zhu XM, Lee SF, Sham KWY, Lai JMY, Chak CP, Wang YXJ, Cheng CHK. Ternary hybrid nanocomposites for gene delivery and magnetic resonance imaging of hepatocellular carcinoma cells. Quant Imaging Med Surg 2013; 3:302-7. [PMID: 24404444 PMCID: PMC3882806 DOI: 10.3978/j.issn.2223-4292.2013.12.05] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 12/13/2013] [Indexed: 01/28/2023]
Abstract
This paper describes comparative studies in magnetic resonance imaging (MRI) and gene deliveries toward hepatocellular carcinoma (HCC) HepG2 cells with ternary composites that consist of superparamagnetic iron oxide (SPIO) nanoparticles (NPs) (8-10 nm) with deferoxamine coating, circular plasmid DNA (~4 kb) equipped with green fluorescent probe, and branched polyethylenimine (PEI) (25 kDa, PDI 2.5). The packaging of the ternary complexes has been characterized by agarose gel retardation assay. By tuning the PEI/NP ratios and with a fixed DNA amount, different ternary composites have been employed for NP/gene transfection towards HepG2 cells, which have been characterized by in vitro MRI and green fluorescence protein (GFP) fluorescence.
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Affiliation(s)
- Ken Cham-Fai Leung
- Department of Chemistry and Institute of Creativity, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China
| | - Chi-Hin Wong
- Department of Chemistry and Institute of Creativity, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China
| | - Xiao-Ming Zhu
- Department of Chemistry and Institute of Creativity, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China
- Department of Imaging and Interventional Radiology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Siu-Fung Lee
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Kathy W. Y. Sham
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Josie M. Y. Lai
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Chun-Pong Chak
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Yi-Xiang J. Wang
- Department of Imaging and Interventional Radiology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Christopher H. K. Cheng
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
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Leung KCF, Lee SF, Wong CH, Chak CP, Lai JMY, Zhu XM, Wang YXJ, Sham KWY, Cheng CHK. Nanoparticle-DNA-polymer composites for hepatocellular carcinoma cell labeling, sensing, and magnetic resonance imaging. Methods 2013; 64:315-21. [PMID: 23811300 DOI: 10.1016/j.ymeth.2013.06.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 06/11/2013] [Indexed: 11/26/2022] Open
Abstract
This paper describes comparative studies and protocols in (1) self-assembling of ultrasmall superparamagnetic iron oxide nanoparticle (NP), circular plasmid DNA, and branched polyethylenimine (PEI) composites; (2) magnetofection; (3) gene delivery, (4) magnetic resonance imaging (MRI), and (5) cytotoxicity of the composites toward hepatocellular carcinoma HepG2 cells.
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Affiliation(s)
- Ken Cham-Fai Leung
- Department of Chemistry, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong Special Administrative Region; Institute of Creativity, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong Special Administrative Region; Institute of Molecular Functional Materials, Areas of Excellence, University Grants Committee, Hong Kong Special Administrative Region.
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Li H, Chen DX, Sun YL, Zheng YB, Tan LL, Weiss PS, Yang YW. Viologen-Mediated Assembly of and Sensing with Carboxylatopillar[5]arene-Modified Gold Nanoparticles. J Am Chem Soc 2013; 135:1570-6. [DOI: 10.1021/ja3115168] [Citation(s) in RCA: 405] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hui Li
- State Key Laboratory of Supramolecular
Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Dai-Xiong Chen
- State Key Laboratory of Supramolecular
Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Yu-Long Sun
- State Key Laboratory of Supramolecular
Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Yue Bing Zheng
- California NanoSystems Institute and Departments of Chemistry & Biochemistry and Materials Science & Engineering, University of California, Los Angeles, California 90095, United States
| | - Li-Li Tan
- State Key Laboratory of Supramolecular
Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Paul S. Weiss
- California NanoSystems Institute and Departments of Chemistry & Biochemistry and Materials Science & Engineering, University of California, Los Angeles, California 90095, United States
| | - Ying-Wei Yang
- State Key Laboratory of Supramolecular
Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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Wang DW, Zhu XM, Lee SF, Chan HM, Li HW, Kong SK, Yu JC, Cheng CHK, Wang YXJ, Leung KCF. Folate-conjugated Fe3O4@SiO2@gold nanorods@mesoporous SiO2 hybrid nanomaterial: a theranostic agent for magnetic resonance imaging and photothermal therapy. J Mater Chem B 2013; 1:2934-2942. [DOI: 10.1039/c3tb20090f] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Jin X, Liang J, Yang C, Hao R, Zhuang J, Yang W. Facile deposition of continuous gold shells on Tween-20 modified Fe3O4 superparticles. J Mater Chem B 2013; 1:1921-1925. [DOI: 10.1039/c3tb00045a] [Citation(s) in RCA: 9] [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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Xuan SH, Lee SF, Lau JTF, Zhu X, Wang YXJ, Wang F, Lai JMY, Sham KWY, Lo PC, Yu JC, Cheng CHK, Leung KCF. Photocytotoxicity and magnetic relaxivity responses of dual-porous γ-Fe2O3@meso-SiO2 microspheres. ACS APPLIED MATERIALS & INTERFACES 2012; 4:2033-2040. [PMID: 22409402 DOI: 10.1021/am300008x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Novel high magnetization microspheres with porous γ-Fe(2)O(3) core and porous SiO(2) shell were synthesized using a templating method, whereas the size of the magnetic core and the thickness of the porous shell can be controlled by tuning the experimental parameters. By way of an example, as-prepared γ-Fe(2)O(3)@meso-SiO(2) microspheres (170 nm) display excellent water-dispersity and show photonic characteristics under externally applied a magnetic field. The magnetic property of the γ-Fe(2)O(3) porous core enables the microspheres to be used as a contrast agent in magnetic resonance imaging with a high r(2) (76.5 s(-1) mM(-1) Fe) relaxivity. The biocompatible composites possess a large BET surface area (222.3 m(2)/g), demonstrating that they can be used as a bifunctional agent for both MRI and drug carrier. Because of the high substrate loading of the magnetic, dual-porous materials, only a low dosage of the substrate will be acquired for potential practical applications. Hydrophobic zinc(II) phthalocyanine (ZnPC) photosensitizing molecules have been encapsulated into the dual-porous microspheres to form γ-Fe(2)O(3)@meso-SiO(2)-ZnPC microspheres. Biosafety, cellular uptake in HT29 cells, and in vitro MRI of these nanoparticles have been demonstrated. Photocytotoxicity (λ > 610 nm) of the HT29 cells uptaken with γ-Fe(2)O(3)@meso-SiO(2)-ZnPC microspheres has been demonstrated for 20 min illumination.
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Affiliation(s)
- Shou-hu Xuan
- Institute of Molecular Functional Materials and Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR
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Yang X, Su Y, Paau MC, Choi MMF. Mass Spectrometric Identification of Water-Soluble Gold Nanocluster Fractions from Sequential Size-Selective Precipitation. Anal Chem 2012; 84:1765-71. [PMID: 22229882 DOI: 10.1021/ac2029908] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xiupei Yang
- College of Chemistry and Chemical
Engineering, China West Normal University, Nanchong 637000, P. R. China
| | - Yan Su
- College of Chemistry and Chemical
Engineering, China West Normal University, Nanchong 637000, P. R. China
| | - Man Chin Paau
- Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, Hong Kong SAR, P. R. China
| | - Martin M. F. Choi
- Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, Hong Kong SAR, P. R. China
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Mullen DG, Banaszak Holl MM. Heterogeneous ligand-nanoparticle distributions: a major obstacle to scientific understanding and commercial translation. Acc Chem Res 2011; 44:1135-45. [PMID: 21812474 DOI: 10.1021/ar1001389] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nanoparticles conjugated with functional ligands are expected to have a major impact in medicine, photonics, sensing, and nanoarchitecture design. One major obstacle to realizing the promise of these materials, however, is the difficulty in controlling the ligand/nanoparticle ratio. This obstacle can be segmented into three key areas: First, many designs of these systems have failed to account for the true heterogeneity of ligand/nanoparticle ratios that compose each material. Second, studies in the field often use the mean ligand/nanoparticle ratio as the accepted level of characterization of these materials. This measure is insufficient because it does not provide information about the distribution of ligand/nanoparticle species within a sample or the number and relative amount of the different species that compose a material. Without these data, researchers do not have an accurate definition of material composition necessary both to understand the material-property relationships and to monitor the consistency of the material. Third, some synthetic approaches now in use may not produce consistent materials because of their sensitivity to reaction kinetics and to the synthetic history of the nanoparticle. In this Account, we describe recent advances that we have made in under standing the material composition of ligand-nanoparticle systems. Our work has been enabled by a model system using poly(amidoamine) dendrimers and two small molecule ligands. Using reverse phase high-pressure liquid chromatography (HPLC), we have successfully resolved and quantified the relative amounts and ratios of each ligand/dendrimer combination. This type of information is rare within the field of ligand-nanoparticle materials because most analytical techniques have been unable to identify the components in the distribution. Our experimental data indicate that the actual distribution of ligand-nanoparticle components is much more heterogeneous than is commonly assumed. The mean ligand/nanoparticle ratio that is typically the only information known about a material is insufficient because the mean does not provide information on the diversity of components in the material and often does not describe the most common component (the mode). Additionally, our experimental data has provided examples of material batches with the same mean ligand/nanoparticle ratio and very different distributions. This discrepancy indicates that the mean cannot be used as the sole metric to assess the reproducibility of a system. We further found that distribution profiles can be highly sensitive to the synthetic history of the starting material as well as slight changes in reaction conditions. We have incorporated the lessons from our experimental data into the design of new ligand-nanoparticle systems to provide improved control over these ratios.
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Affiliation(s)
- Douglas G. Mullen
- Chemistry Department, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Mark M. Banaszak Holl
- Chemistry Department, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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Leung KCF, Xuan S, Zhu X, Wang D, Chak CP, Lee SF, Ho WKW, Chung BCT. Gold and iron oxide hybrid nanocomposite materials. Chem Soc Rev 2011; 41:1911-28. [PMID: 22037623 DOI: 10.1039/c1cs15213k] [Citation(s) in RCA: 223] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This critical review provides an overview of current research activities that focused on the synthesis and application of multi-functional gold and iron oxide (Au-Fe(x)O(y)) hybrid nanoparticles and nanocomposites. An introduction of synthetic strategies that have been developed for generating Au-Fe(x)O(y) nanocomposites with different nanostructures is presented. Surface functionalisation and bioconjugation of these hybrid nanoparticles and nanocomposites are also reviewed. A variety of applications such as theranostics, gene delivery, biosensing, cell sorting, bio-separation, and catalysis is discussed and highlighted. Finally, future trends and perspectives of these sophisticated nanocomposites are outlined. Underpinning the fundamental requirements for effectively forming Au-Fe(x)O(y) hybrid nanocomposite materials would shed light on future development of nanotheranostics, nanomedicines, and chemical technologies. It would be interesting to investigate such multi-component composite nanomaterials with different novel morphologies in the near future to advance chemistry, biology, medicine, and engineering multi-disciplinary research (120 references).
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Affiliation(s)
- Ken Cham-Fai Leung
- Institute of Creativity and Department of Chemistry, The Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR.
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Tsai DH, Cho TJ, DelRio FW, Taurozzi J, Zachariah MR, Hackley VA. Hydrodynamic Fractionation of Finite Size Gold Nanoparticle Clusters. J Am Chem Soc 2011; 133:8884-7. [DOI: 10.1021/ja203328j] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- De-Hao Tsai
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Tae Joon Cho
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Frank W. DelRio
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Julian Taurozzi
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Michael R. Zachariah
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Departments of Mechanical Engineering and Chemistry, University of Maryland, College Park, Maryland 20740, United States
| | - Vincent A. Hackley
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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Xuan S, Wang F, Lai JMY, Sham KWY, Wang YXJ, Lee SF, Yu JC, Cheng CHK, Leung KCF. Synthesis of biocompatible, mesoporous Fe(3)O(4) nano/microspheres with large surface area for magnetic resonance imaging and therapeutic applications. ACS APPLIED MATERIALS & INTERFACES 2011; 3:237-244. [PMID: 21229966 DOI: 10.1021/am1012358] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This article reports the fabrication of mesoporous Fe(3)O(4) nano/microspheres with a high surface area value (163 m(2)/g, Brunauer-Emmett-Teller) and demonstrates their use for drug loading, release, and magnetic resonance imaging (MRI). These monodispersed, mesoporous Fe(3)O(4) nano/microspheres with controllable average sizes ranging from 50 to 200 nm were synthesized using a Fe(3)O(4)/poly(acrylic acid) hybrid sphere template and subsequent silica shell formation and removal. We found that the SiO(2) coating is a crucial step for the successful synthesis of uniform mesoporous Fe(3)O(4) nano/microspheres. The as-synthesized mesoporous Fe(3)O(4) nanospheres show a high magnetic saturation value (M(s) = 48.6 emu/g) and could be used as MRI contrast agents (r(2) = 36.3 s(-1) mM(-1)). Trypan blue exclusion and MTT assay (see Supporting Information ) cytotoxicity analyses of the nanospheres based on HepG2 and MDCK cells showed that the products were biocompatible, with a lower toxicity than lipofectamine (positive control). Hydrophilic ibuprofen and hydrophobic zinc(II) phthalocyanine drug loading into mesoporous Fe(3)O(4) nanospheres and selected release experiments were successfully achieved. The potential use of mesoporous Fe(3)O(4) nanospheres in biomedical applications, in light of the nano/microspheres' efficient drug loading and release, MRI, and low cytotoxicity, has been demonstrated. It is envisaged that mesoporous Fe(3)O(4) nanospheres can be used as drug carriers and MRI contrast agents for the reticuloendothelial system; they can also be delivered locally, such as via a selective catheter.
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Affiliation(s)
- Shouhu Xuan
- Center of Novel Functional Molecules and Institute of Molecular Functional Materials, Department of Chemistry, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, People's Republic of China
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Chak CP, Chau LH, Wu SY, Ho HP, Li WJ, Mendes PM, Leung KCF. Simultaneous purification and surface plasmon resonance characterization of mechanoresponsive, discretely functionalized gold nanoparticles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03709e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Chak CP, Lai JMY, Sham KWY, Cheng CHK, Leung KCF. DNA hybridization of pathogenicity island of vancomycin-resistant Enterococcus faecalis with discretely functionalized gold nanoparticles in organic solvent mixtures. RSC Adv 2011. [DOI: 10.1039/c1ra00304f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Pamies R, Volden S, Kjøniksen AL, Zhu K, Glomm WR, Nyström B. Adsorption of cationic hydroxyethylcellulose derivatives onto planar and curved gold surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15925-15932. [PMID: 20839882 DOI: 10.1021/la102716m] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The adsorption of two positively charged hydroxyethylcellulose derivatives with 7 and 60 mol % positively charged groups and a cationic, hydrophobically modified hydroxyethylcellulose containing 1 mol % hydrophobic groups and 7 mol % charged groups onto flat and spherical citrate-coated gold surfaces of different sizes has been investigated. The planar surfaces were studied by means of the quartz crystal microbalance with dissipation monitoring, whereas nanoparticle suspensions were examined using dynamic light scattering and UV-vis spectroscopy. Two different driving forces for adsorption have been evaluated: the electrostatic interaction between the positive charges on the polymers and the negatively charged gold surfaces and the affinity of the polymers for gold due to hydrophobic interactions. The comparison between the data obtained from curved and planar surfaces suggests a strong correlation between surface curvature and adlayer conformation in the formation of the hybrid polymer-gold nanoparticles. The influence of particle size on the amount of adsorbed polymer has been evaluated for the different polymers. The impact of the ionic strength on polymer adsorption has been explored, and the adsorbed polymer layer has been found to protect the gold nanoparticles from aggregation when salt is added to the solution. The addition of salt to a mixture of gold particles and a charged polymer can induce a thicker adsorbed layer at low salinity, and desorption was found at high levels of salt addition.
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Affiliation(s)
- Ramón Pamies
- Department of Chemistry, University of Oslo, P.O. Box 1033, N-0315 Oslo, Norway
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Mullen DG, Borgmeier EL, Desai AM, van Dongen MA, Barash M, Cheng XM, Baker JR, Holl MMB. Isolation and characterization of dendrimers with precise numbers of functional groups. Chemistry 2010; 16:10675-8. [PMID: 20683917 PMCID: PMC2942990 DOI: 10.1002/chem.201001175] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Douglas G. Mullen
- Macromolecular Science and Engineering, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
- Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA)
| | - Emilee L. Borgmeier
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - Ankur M. Desai
- Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA)
| | - Mallory A. van Dongen
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - Mark Barash
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - Xue-min Cheng
- Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA)
| | - James R. Baker
- Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA)
| | - Mark M. Banaszak Holl
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
- Macromolecular Science and Engineering, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
- Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA)
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Jin R. Nanoparticle Clusters Light Up in SERS. Angew Chem Int Ed Engl 2010; 49:2826-9. [DOI: 10.1002/anie.200906462] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Indexed: 11/07/2022]
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Liu X, Liu H, Zhou W, Zheng H, Yin X, Li Y, Guo Y, Zhu M, Ouyang C, Zhu D, Xia A. Thermoreversible covalent self-assembly of oligo(p-phenylenevinylene) bridged gold nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:3179-3185. [PMID: 20028115 DOI: 10.1021/la903838w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Organic-inorganic hybrids have been fabricated through mild Diels-Alder cross-linking between maleimide bearing oligo(p-phenylenevinylene) (OPV) and furan functionalized gold nanoparticles with diameter smaller than 2 nm. The OPV ligands afford strong reaction ability toward furan group due to their maleimide moieties. These small gold nanoparticles form close-packed homogeneous hybrids with well-defined interfaces by incorporating OPV ligands in solutions. Covalent assembly and disassembly of gold nanoparticles can be achieved by repeated thermal stimuli on as-obtained hybrids, which can be monitored by fluorescence changes of OPVs and surface plasmon resonance absorption. Moreover, the dramatic photophysical properties and assembly behavior of these hybrids allow this procedure to be performed as a smart assay for monitoring the process of the Diels-Alder reaction.
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Affiliation(s)
- Xiaofeng Liu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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Chen W, Xu N, Xu L, Wang L, Li Z, Ma W, Zhu Y, Xu C, Kotov NA. Multifunctional magnetoplasmonic nanoparticle assemblies for cancer therapy and diagnostics (theranostics). Macromol Rapid Commun 2010; 31:228-36. [PMID: 21590896 DOI: 10.1002/marc.200900793] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Indexed: 12/29/2022]
Abstract
In this work, we describe the preparation and biomedical functionalities of complex nanoparticle assemblies with magnetoplasmonic properties suitable for simultaneous cancer therapy and diagnostics (theranostics). Most commonly magnetoplasmonic nanostructures are made by careful adaptation of metal reduction protocols which is both tedious and restrictive. Here we apply the strategy of nanoscale assemblies to prepare such systems from individual building blocks. The prepared superstructures are based on magnetic Fe(3) O(4) nanoparticles encapsulated in silica shell representing the magnetic module. The cores are surrounded in a corona-like fashion by gold nanoparticles representing the plasmonic module. As additional functionality they were also coated by poly(ethyleneglycol) chains as a cloaking agent to extend the blood circulation time. The preparation is exceptionally simple and allows one to vary the contribution of each function. Both modules can carry drugs and, in this study, they were loaded with the potential anticancer drug curcumin. A comprehensive set of microscopy, spectroscopy and biochemical methods were applied to characterize both imaging and therapeutic function of the nanoparticle assemblies against leukemia HL-60 cells. High contrast magnetic resonance images and high apoptosis rates demonstrate the success of assembly approach for the preparation of magnetoplasmonic nanoparticles. This technology allows one to easily "dial in" the functionalities in the clinical setting for personalized theranostic regiments.
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Affiliation(s)
- Wei Chen
- Department of Chemical Engineering, University of Michigan, Ann Arbor, 48109 Michigan, USA; School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
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38
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Blanco-Andujar C, Tung LD, Thanh NTK. Synthesis of nanoparticles for biomedical applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b920666n] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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39
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Leung KCF, Lau KN. Self-assembly and thermodynamic synthesis of rotaxane dendrimers and related structures. Polym Chem 2010. [DOI: 10.1039/b9py00380k] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Xuan S, Wang F, Wang YXJ, Yu JC, Leung KCF. Facile synthesis of size-controllable monodispersed ferrite nanospheres. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00159g] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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41
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Kim JY, Lee JS. Synthesis and thermally reversible assembly of DNA-gold nanoparticle cluster conjugates. NANO LETTERS 2009; 9:4564-4569. [PMID: 19928782 DOI: 10.1021/nl9030709] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We describe the facile synthesis of stable gold nanoparticle clusters densely functionalized with DNA (DNA-AuNP clusters) using dithiothreitol and monothiol DNA and their thermally reversible assembly properties. The size of the clusters exhibits a very narrow distribution and can be easily controlled by adjusting the stoichiometry of dithiothreitol and DNA, leading to a variety of colors due to the surface plasmon resonance of the AuNP clusters. Importantly, the DNA-AuNP clusters exhibit highly cooperative melting properties with distinctive and diverse color changes depending on their size. The selective and sensitive colorimetric detection of target sequences was demonstrated based upon the unique properties of the DNA-AuNP clusters.
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Affiliation(s)
- Ji-Young Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea
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