201
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Macfarlane RJ, O'Brien MN, Petrosko SH, Mirkin CA. Nucleic acid-modified nanostructures as programmable atom equivalents: forging a new "table of elements". Angew Chem Int Ed Engl 2013; 52:5688-98. [PMID: 23640804 DOI: 10.1002/anie.201209336] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 01/24/2013] [Indexed: 12/29/2022]
Affiliation(s)
- Robert J Macfarlane
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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202
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Wang T, Wang X, LaMontagne D, Wang Z, Cao YC. Macroscale Lateral Alignment of Semiconductor Nanorods into Freestanding Thin Films. J Am Chem Soc 2013; 135:6022-5. [DOI: 10.1021/ja402539f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tie Wang
- Department of Chemistry, University of Florida, Gainesville, Florida 32611,
United States
| | - Xirui Wang
- Department of Chemistry, University of Florida, Gainesville, Florida 32611,
United States
| | - Derek LaMontagne
- Department of Chemistry, University of Florida, Gainesville, Florida 32611,
United States
| | - Zhongwu Wang
- Cornell High
Energy Synchrotron
Source (CHESS), Wilson Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Y. Charles Cao
- Department of Chemistry, University of Florida, Gainesville, Florida 32611,
United States
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203
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Mai Y, Xiao L, Eisenberg A. Morphological Control in Aggregates of Amphiphilic Cylindrical Metal–Polymer “Brushes”. Macromolecules 2013. [DOI: 10.1021/ma400236g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yiyong Mai
- School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, P. R. China
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal,
Quebec H3A 2K6, Canada
| | - Lin Xiao
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal,
Quebec H3A 2K6, Canada
| | - Adi Eisenberg
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal,
Quebec H3A 2K6, Canada
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204
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Ma X, Xue Y, Dai L, Urbas A, Li Q. Hydrophilic Cucurbit[7]uril-Pseudorotaxane-Anchored-Monolayer-Protected Gold Nanorods. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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205
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Liu Z, Huang H, He T. Large-area 2D gold nanorod arrays assembled on block copolymer templates. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:505-510. [PMID: 23042712 DOI: 10.1002/smll.201201503] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 09/13/2012] [Indexed: 06/01/2023]
Abstract
Various large-area 2D gold nanorod arrays are achieved on plasma-etched block copolymer templates. With the help of capillary forces, aqueous gold nanorods assembled on the templates show good position selectivity and high coverage of the grooves. Furthermore, these nanorod arrays can transform into gold nanowires by a post-etching process.
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Affiliation(s)
- Zhicheng Liu
- State Key Laboratory of Polymer, Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, People's Republic of China
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206
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Zhen SJ, Zhang ZY, Li N, Zhang ZD, Wang J, Li CM, Zhan L, Zhuang HL, Huang CZ. UV light-induced self-assembly of gold nanocrystals into chains and networks in a solution of silver nitrate. NANOTECHNOLOGY 2013; 24:055601. [PMID: 23306830 DOI: 10.1088/0957-4484/24/5/055601] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Controllable assemblies of nanocrystals have attracted considerable interest because they often exhibit unique collective properties that differ from those displayed by individual nanocrystals and bulk samples. Reported approaches to prepare nanocrystal assemblies based on the molecular recognitions of small molecules or biomacromolecules are effective, but often require complicated and time-consuming modification processes of nanocrystals. In this paper, we demonstrate a simple and universal approach to assemble gold nanocrystals (AuNCs) into linear chains and complex networks in aqueous silver nitrate medium under irradiation with UV light without the involvement of any modification step. Due to the strong plasmon resonance coupling verified by finite difference time domain calculation, the assembled structures of AuNCs can be used as excellent surface-enhanced Raman scattering substrates and dark-field light-scattering bioimaging probes.
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Affiliation(s)
- Shu Jun Zhen
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
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207
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Placido T, Aragay G, Pons J, Comparelli R, Curri ML, Merkoçi A. Ion-directed assembly of gold nanorods: a strategy for mercury detection. ACS APPLIED MATERIALS & INTERFACES 2013; 5:1084-1092. [PMID: 23305173 DOI: 10.1021/am302870b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Water-soluble gold nanorods (Au NRs) have been functionalized with an N-alkylaminopyrazole ligand, 1-[2-(octylamino)ethyl]-3,5-diphenylpyrazole (PyL), that has been demonstrated able to coordinate heavy metal ions. The N-alkylaminopyrazole functionalized Au NRs have been characterized by electron microscopy and spectroscopic investigation and tested in optical detection experiments of different ions, namely, Zn(2+), Cd(2+), Hg(2+), Cu(2+), Pb(2+), and As(3+). In particular, the exposure of the functionalized NRs to increasing amounts of Hg(2+) ions has resulted in a gradual red-shift and broadening of the longitudinal plasmon band, up to 900 nm. Interestingly, a significantly different response has been recorded for the other tested ions. In fact, no significant shift in the longitudinal plasmon band has been observed for any of them, while a nearly linear reduction in the plasmon band intensity versus ion concentration in solution has been detected. The very high sensitivity for Hg(2+) with respect to other investigated ions, with a limit of detection of 3 ppt, demonstrates that the functionalization of Au NRs with PyL is a very effective method to be implemented in a reliable colorimetric sensing device, able to push further down the detection limit achieved by applying similar strategies to spherical Au NPs.
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Affiliation(s)
- Tiziana Placido
- CNR-IPCF Istituto per i Processi Chimici e Fisici, Sez. Bari, c/o Dip. Chimica Via Orabona 4, 70126, Bari, Italy
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208
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Abstract
Nanoparticles possess unique properties that are enhanced due to their small size and varied shapes. These properties can be directly manipulated by controlling the aggregation state, which can further be exploited for applications in bio/chemical sensing, plasmonics, and as supports for catalysts. While the advantages of controlled aggregates of nanomaterials are great, synthetic strategies to achieve such structures with precision over the final arrangement of the materials in three-dimensional space remain limited. We have shown that ligand exchange reactions on Au nanomaterials of various shapes using simple amino acids can induce the formation of linear aggregates of the materials. The assembly process is mediated by partial ligand exchange on the particle surface, followed by the surface segregation of the two ligands that produces an electric dipole across the nanomaterial from which alignment occurs in solution via dipole-dipole interactions. This linear-based assembly can be used to tune the optical properties of the materials and could represent new pathways to study the interactions between biological molecules and inorganic nanomaterials.
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209
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Sathe BR. High aspect ratio rhodium nanostructures for tunable electrocatalytic performance. Phys Chem Chem Phys 2013; 15:7866-72. [DOI: 10.1039/c3cp50414j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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210
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Blythe KL, Mayer KM, Weber ML, Willets KA. Ground state depletion microscopy for imaging interactions between gold nanowires and fluorophore-labeled ligands. Phys Chem Chem Phys 2013; 15:4136-45. [DOI: 10.1039/c2cp43152a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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211
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Willets KA. Super-resolution imaging of interactions between molecules and plasmonic nanostructures. Phys Chem Chem Phys 2013; 15:5345-54. [DOI: 10.1039/c3cp43882a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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212
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Thete A, Rojas O, Neumeyer D, Koetz J, Dujardin E. Ionic liquid-assisted morphosynthesis of gold nanorods using polyethyleneimine-capped seeds. RSC Adv 2013. [DOI: 10.1039/c3ra22112a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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213
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Ke S, Kan C, Liu J, Cong B. Controlled assembly of gold nanorods using tetrahydrofuran. RSC Adv 2013. [DOI: 10.1039/c2ra23300b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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214
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Stanisavljevic M, Janu L, Smerkova K, Krizkova S, Pizurova N, Ryvolova M, Adam V, Hubalek J, Kizek R. Study of Streptavidin-Modified Quantum Dots by Capillary Electrophoresis. Chromatographia 2012. [DOI: 10.1007/s10337-012-2372-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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215
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Gabudean AM, Biro D, Astilean S. Hybrid plasmonic platforms based on silica-encapsulated gold nanorods as effective spectroscopic enhancers for Raman and fluorescence spectroscopy. NANOTECHNOLOGY 2012; 23:485706. [PMID: 23138835 DOI: 10.1088/0957-4484/23/48/485706] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Surface-enhanced Raman scattering (SERS) nano-tags are of increasing interest in biomedical research as viable alternatives to bio-imaging techniques based on semiconductor quantum dots or fluorescent molecules. In this work, we fabricate silica-coated gold nanorods (AuNRs) encoded with two molecular labels to operate as highly effective spectroscopic nano-tags in near-infrared SERS (NIR-SERS) and surface-enhanced resonance Raman scattering combined with metal-enhanced fluorescence (SERRS-MEF), respectively. Specifically, a non-fluorescent molecule with strong affinity for a gold surface (para-aminothiophenol, p-ATP) and a common dye (Nile Blue, NB) with lower affinity have been successfully tested as NIR-SERS nano-tags under laser excitation at 785 nm. Moreover, as a result of designing AuNRs with a plasmon resonance band overlapping the electronic absorption band of the encoded NB molecule, a dual SERRS and MEF performance has been devised under resonant excitation at 633 nm. We explain this result by considering a partial desorption of NB molecules from the metal surface and their trapping into the silica shell at favorable distances to avoid quenching and enhance the fluorescence signal. Finally, we prove that the silica shell prevents the desorption or chemical transformation of p-ATP into p,p'-dimercaptoazobenzene species, as previously noticed, thus providing a highly stable SERRS signal, which is crucial for imaging applications.
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Affiliation(s)
- A M Gabudean
- Nanobiophotonics Center, Interdisciplinary Research Institute in Bio-Nano-Sciences and Faculty of Physics, Babes-Bolyai University, Cluj-Napoca, Romania
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216
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Ma X, Urbas A, Li Q. Controllable self-assembling of gold nanorods via on and off supramolecular noncovalent interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:16263-7. [PMID: 23101766 DOI: 10.1021/la303424x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
5,15-Bis(4-sulfonatophenyl)porphyrin (DPPS) with a planar conjugated system and two negative charges was found to be able to engender the self-assembling of CTAB-GNRs due to the electrostatic interaction between DPPS and CTAB together with the π-π intermolecular interaction of DPPS, while its bulky supramolecular pseudo[3]rotaxane included by β-cyclodextrin prevented such self-assembling due to the interruption of the above noncovalent interactions.
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Affiliation(s)
- Xiang Ma
- Liquid Crystal Institute, Kent State University, Kent, Ohio 44242, USA
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217
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Yu Y, Chen X, Wei Y, Liu JH, Yu SH, Huang XJ. CdSe quantum dots enhance electrical and electrochemical signals of nanogap devices for bioanalysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:3274-3281. [PMID: 22761032 DOI: 10.1002/smll.201200487] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Yang Yu
- Research Center for Biomimetic Functional, Materials and Sensing Devices, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
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218
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Lukach A, Liu K, Therien-Aubin H, Kumacheva E. Controlling the Degree of Polymerization, Bond Lengths, and Bond Angles of Plasmonic Polymers. J Am Chem Soc 2012; 134:18853-9. [DOI: 10.1021/ja309475e] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Ariella Lukach
- Department of Chemistry, University of Toronto, 80 Saint George
Street, Toronto, Ontario M5S 3H6, Canada
| | - Kun Liu
- Department of Chemistry, University of Toronto, 80 Saint George
Street, Toronto, Ontario M5S 3H6, Canada
| | - Heloise Therien-Aubin
- Department of Chemistry, University of Toronto, 80 Saint George
Street, Toronto, Ontario M5S 3H6, Canada
| | - Eugenia Kumacheva
- Department of Chemistry, University of Toronto, 80 Saint George
Street, Toronto, Ontario M5S 3H6, Canada
- Department of Chemical
Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5,
Canada
- The Institute
of Biomaterials
and Biomedical Engineering, University of Toronto, 4 Taddle Creek Road, Toronto, Ontario M5S 3G9,
Canada
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219
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Pelaz B, Jaber S, de Aberasturi DJ, Wulf V, Aida T, de la Fuente JM, Feldmann J, Gaub HE, Josephson L, Kagan CR, Kotov NA, Liz-Marzán LM, Mattoussi H, Mulvaney P, Murray CB, Rogach AL, Weiss PS, Willner I, Parak WJ. The state of nanoparticle-based nanoscience and biotechnology: progress, promises, and challenges. ACS NANO 2012; 6:8468-83. [PMID: 23016700 DOI: 10.1021/nn303929a] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Colloidal nanoparticles (NPs) have become versatile building blocks in a wide variety of fields. Here, we discuss the state-of-the-art, current hot topics, and future directions based on the following aspects: narrow size-distribution NPs can exhibit protein-like properties; monodispersity of NPs is not always required; assembled NPs can exhibit collective behavior; NPs can be assembled one by one; there is more to be connected with NPs; NPs can be designed to be smart; surface-modified NPs can directly reach the cytosols of living cells.
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Affiliation(s)
- Beatriz Pelaz
- Fachbereich Physik and WZMW, Philipps Universität Marburg, 35037 Marburg, Germany
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220
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Liu K, Resetco C, Kumacheva E. Salt-mediated kinetics of the self-assembly of gold nanorods end-tethered with polymer ligands. NANOSCALE 2012; 4:6574-6580. [PMID: 22975762 DOI: 10.1039/c2nr31832f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Studies on the self-assembly of metal nanoparticles (NPs) in the presence of ions are motivated by the biosensing applications of NP clusters and the capability to control the morphology of clusters of oppositely charged NPs. The effect of ions has been explored for the self-assembly of metal NPs capped solely with ionic ligands, whereas, in general, the surface of NPs can be coated with a mixture of ligands interacting with each other by non-electrostatic forces. In the present work, we examined the kinetics of self-assembly of gold nanorods capped with a mixture of low-molecular weight ionic molecules and nonpolar polymer ligands. We show that in contrast with earlier reports on the effect of electrolytes on NP self-assembly, the driving force for the accelerated self-assembly of nanorods is the reduction in polymer solubility in the presence of ions, rather than the screening of the electric double layer of the charged ligands. The reported results are important for NP self-assembly occurring in mixed solvents, in which attraction forces between nonpolar ligands are governed by the balance between solvent-solvent and solvent-salt interactions. Furthermore, the addition of salts can be used to increase the rate of nanorod self-assembly, which, otherwise, is an intrinsically slow process.
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Affiliation(s)
- Kun Liu
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
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221
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Zhou X, Wang Y, Zhong L, Bao S, Han Y, Ren L, Zhang Q. Rational design of oriented assembly of gold nanospheres with nanorods by biotin-streptavidin connectors. NANOSCALE 2012; 4:6256-6259. [PMID: 22955723 DOI: 10.1039/c2nr32022c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Through the different functionalities on Au nanosphere (AuNSs) and Au nanorod (AuNRs) surfaces, we successfully control AuNSs attachment onto either the end or side surface of anisotropic AuNRs via bio-recognition, and then consciously construct side-by-side or end-to-end assembly nanostructures. This study provides a feasible approach to organize nanoparticles with different morphologies into controllable assembly geometries, which can potentially benefit the construction of future nanodevices.
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Affiliation(s)
- Xi Zhou
- Department of Biomaterials, College of Materials, The Key Laboratory of Biomedical Engineering of Fujian Province, Xiamen University, Xiamen, 361005, People's Republic of China.
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222
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Park WM, Choi BG, Huh YS, Hong WH, Lee SY, Park TJ. Facile Functionalization of Colloidal Gold Nanorods by the Specific Binding of an Engineered Protein that Is Preferred over CTAB Bilayers. Chempluschem 2012. [DOI: 10.1002/cplu.201200239] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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223
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DETZEL CHRISTOPHERJ, LENG WEINAN, VIKESLAND PETERJ, RAJAGOPALAN PADMAVATHY. INTRACELLULAR LOCALIZATION AND KINETICS OF UPTAKE AND CLEARANCE OF GOLD NANOPARTICLES IN PRIMARY HEPATIC CELLS. ACTA ACUST UNITED AC 2012. [DOI: 10.1142/s1793984412410085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Gold nanoparticles (AuNPs) used for therapeutic applications preferentially accumulate in the liver following exposure. However, uptake and clearance by hepatic cells are not well understood. Time-dependent intracellular localization, uptake and clearance of 30 nm AuNPs were monitored in primary rat hepatocytes and liver sinusoidal endothelial cells (LSECs). Confocal Raman microscopy studies demonstrated the differences in the localization of AuNPs in hepatic cells over a 24 h period. The uptake of unmodified AuNPs over 24 h was 17% and 55% for hepatocytes and LSECs. The uptake of poly(ethylene glycol)-coated AuNPs was 3% and 1% over 24 h in hepatocytes and LSECs, respectively. Both cell types expelled approximately 60–70% of intracellular AuNPs within seven days. AuNP accumulation resulted in the disruption of the pericanalicular actin between adjoining hepatocytes. These trends suggest that AuNPs may affect actin organization, which could impair hepatic function long term.
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Affiliation(s)
| | - WEINAN LENG
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg 24061, VA, USA
- Institute for Critical Technology and Applied Science, Virginia Tech, Blacksburg 24061, VA, USA
| | - PETER J. VIKESLAND
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg 24061, VA, USA
- Institute for Critical Technology and Applied Science, Virginia Tech, Blacksburg 24061, VA, USA
| | - PADMAVATHY RAJAGOPALAN
- Department of Chemical Engineering, Virginia Tech, Blacksburg 24061, VA, USA
- Institute for Critical Technology and Applied Science, Virginia Tech, Blacksburg 24061, VA, USA
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224
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Vigderman L, Khanal BP, Zubarev ER. Functional gold nanorods: synthesis, self-assembly, and sensing applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:4811-41, 5014. [PMID: 22740090 DOI: 10.1002/adma.201201690] [Citation(s) in RCA: 445] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Indexed: 05/19/2023]
Abstract
Gold nanorods have received much attention due to their unique optical and electronic properties which are dependent on their shape, size, and aspect ratio. This article covers in detail the synthesis, functionalization, self-assembly, and sensing applications of gold nanorods. The synthesis of three major types of rods is discussed: single-crystalline and pentahedrally-twinned rods, which are synthesized by wet chemistry methods, and polycrystalline rods, which are synthesized by templated deposition. Functionalization of these rods is usually necessary for their applications, but can often be problematic due to their surfactant coating. Thus, general strategies are provided for the covalent and noncovalent functionalization of gold nanorods. The review will then examine the significant progress that has been made in controllable assembly of nanorods into various arrangements. This assembly can have a large effect on measurable properties of rods, making it particularly applicable towards sensing of a variety of analytes. Other types of sensing not dependent on nanorod assembly, such as refractive-index based sensing, are also discussed.
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Affiliation(s)
- Leonid Vigderman
- Department of Chemistry, Rice University, 6100 Main Street, Houston, TX 77005, USA
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225
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Velu R, Jung S, Won N, Im K, Kim S, Park N. Fluorescence enhancement and end-to-end assembly of bisacridinedione-gold nanorods by calcium ions. Chemphyschem 2012; 13:3445-8. [PMID: 22887360 DOI: 10.1002/cphc.201200433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Indexed: 11/09/2022]
Abstract
Gold nanorod end-to-end assembly is demonstrated by the selective complexation of a bisacridinedione foldamer with Ca(2+). This setup can be applied as a chemosensor for Ca(2+) ions, as the complex shows selective red-shifting of the nanorod plasmon peak and enhancement in fluorescence from the acridinedione moieties upon exposure to Ca(2+) .
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Affiliation(s)
- Ranganathan Velu
- Department of Chemistry, Pohang University of Science & Technology, San, Hyojadong, Namgu, Korea
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226
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Platt M, Willmott GR, Lee GU. Resistive pulse sensing of analyte-induced multicomponent rod aggregation using tunable pores. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:2436-44. [PMID: 22570187 DOI: 10.1002/smll.201200058] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 03/07/2012] [Indexed: 05/09/2023]
Abstract
Resistive pulse sensing is used to monitor individual and aggregated rod-shaped nanoparticles as they move through tunable pores in elastomeric membranes. By comparing particles of similar dimensions, it is demonstrated that the resistive pulse signal of a rod is fundamentally different from that of a sphere. Rods can be distinguished using two measurements: the blockade event magnitude (Δi(p) ), which reveals the particle's size, and the full width at half maximum (FWHM) duration, which relates to the particle's speed and length. While the observed Δi(p) values agree well with simulations, the measured FWHM times are much larger than expected. This increase in dwell time, caused by rods moving through the pore in various orientations, is not observed for spherical particles. These differences are exploited in a new agglutination assay using rod-shaped particles. By controlling the surface chemistry and location of the capture ligand, rods are made to form either long "end-on-end" or wide "side-on" aggregates upon the addition of an analyte. This observation will facilitate multiplexed detection in agglutination assays, as particles with a particular aspect ratio can be distinguished by two measurements. This is first demonstrated with a biotinylated target and avidin capture probe, followed by the detection of platelet-derived growth factor (PDGF-BB) using an aptamer capture probe, with limits of detection down to femtomolar levels.
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Affiliation(s)
- Mark Platt
- Centre for Nanomedicine, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
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227
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Zijlstra P, Paulo PMR, Yu K, Xu QH, Orrit M. Chemical interface damping in single gold nanorods and its near elimination by tip-specific functionalization. Angew Chem Int Ed Engl 2012; 51:8352-5. [PMID: 22777822 DOI: 10.1002/anie.201202318] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 06/08/2012] [Indexed: 01/16/2023]
Affiliation(s)
- Peter Zijlstra
- MoNOS, Huygens Laboratorium, Universiteit Leiden, 2300 RA Leiden, The Netherlands
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228
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Zijlstra P, Paulo PMR, Yu K, Xu QH, Orrit M. Chemical Interface Damping in Single Gold Nanorods and Its Near Elimination by Tip-Specific Functionalization. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202318] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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229
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Casu A, Cabrini E, Donà A, Falqui A, Diaz-Fernandez Y, Milanese C, Taglietti A, Pallavicini P. Controlled Synthesis of Gold Nanostars by Using a Zwitterionic Surfactant. Chemistry 2012; 18:9381-90. [DOI: 10.1002/chem.201201024] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Indexed: 11/10/2022]
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230
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Sun Z, Bao Z, Fang C, Wang J. Formation of different gold nanocrystal core-resin shell structures through the control of the core assembly and shell polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9082-9092. [PMID: 22432549 DOI: 10.1021/la300328c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The formation of different Au nanocrystal core-resin shell structures through the control of the nanocrystal assembly and shell polymerization is investigated. 4-Mercaptophenol is employed together with formaldehyde as the resin monomers. 4-Mercaptophenol molecules bond to the surface of Au nanocrystals so that the resultant phenolic resin can intimately encapsulate Au nanocrystals. The morphologies of the obtained structures are determined by the nanocrystal assembly and the monomer polymerization behaviors, which are controlled by the solution pH as well as the monomer amounts. At pH = 8-9, Au nanorods are assembled and fused together under hydrothermal conditions in a preferential end-to-end manner. The fused structures are coated with a layer of resin, with the thickness controlled by the supplied amounts of the monomers. At pH = ∼10, Au nanorods are coated with resin of controllable thicknesses and separated from each other. The resin-coated Au nanorods are stable in both aqueous and nonaqueous solutions. At pH = ∼12, Au nanorods are coated with a thin layer of resin and assembled together in a side-by-side manner. A similar assembly and resin coating behavior is also observed with Au nanopolyhedrons. Moreover, plasmonic-fluorescent bifunctional structures are readily produced by incorporating CdTe nanocrystals in the resin shell that is coated on Au nanocrystals, owing to the presence of a number of thiol groups in the resin shell.
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Affiliation(s)
- Zhenhua Sun
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR.
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231
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Gao B, Arya G, Tao AR. Self-orienting nanocubes for the assembly of plasmonic nanojunctions. NATURE NANOTECHNOLOGY 2012; 7:433-7. [PMID: 22683842 DOI: 10.1038/nnano.2012.83] [Citation(s) in RCA: 213] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 04/27/2012] [Indexed: 05/21/2023]
Abstract
Plasmonic hot spots are formed when metal surfaces with high curvature are separated by nanoscale gaps and an electromagnetic field is localized within the gaps. These hot spots are responsible for phenomena such as subwavelength focusing, surface-enhanced Raman spectroscopy and electromagnetic transparency, and depend on the geometry of the nanojunctions between the metal surfaces. Direct-write techniques such as electron-beam lithography can create complex nanostructures with impressive spatial control but struggle to fabricate gaps on the order of a few nanometres or manufacture arrays of nanojunctions in a scalable manner. Self-assembly methods, in contrast, can be carried out on a massively parallel scale using metal nanoparticle building blocks of specific shape. Here, we show that polymer-grafted metal nanocubes can be self-assembled into arrays of one-dimensional strings that have well-defined interparticle orientations and tunable electromagnetic properties. The nanocubes are assembled within a polymer thin film and we observe unique superstructures derived from edge-edge or face-face interactions between the nanocubes. The assembly process is strongly dependent on parameters such as polymer chain length, rigidity or grafting density, and can be predicted by free energy calculations.
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Affiliation(s)
- Bo Gao
- NanoEngineering Department, University of California-San Diego, La Jolla, CA 92093-0448, USA
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232
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End-to-end assembly of gold nanorods via oligopeptide linking and surfactant control. J Colloid Interface Sci 2012; 376:83-90. [DOI: 10.1016/j.jcis.2012.03.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 03/08/2012] [Accepted: 03/09/2012] [Indexed: 11/21/2022]
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233
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Jain T, Lara-Avila S, Kervennic YV, Moth-Poulsen K, Nørgaard K, Kubatkin S, Bjørnholm T. Aligned growth of gold nanorods in PMMA channels: parallel preparation of nanogaps. ACS NANO 2012; 6:3861-3867. [PMID: 22494354 DOI: 10.1021/nn204986y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We demonstrate alignment and positional control of gold nanorods grown in situ on substrates using a seed-mediated synthetic approach. Alignment control is obtained by directing the growth of spherical nanoparticle seeds into nanorods in well-defined poly(methyl methacrylate) nanochannels. Substrates with prepatterned metallic electrodes provide an additional handle for the position of the gold nanorods and yield nanometer-sized gaps between the electrode and nanorod. The presented approach is a novel demonstration of bottom-up device fabrication of multiple nanogap junctions on a single chip mediated viain situ growth of gold nanorods acting as nanoelectrodes.
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Affiliation(s)
- Titoo Jain
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen Ø, Denmark
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234
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Hamon C, Postic M, Mazari E, Bizien T, Dupuis C, Even-Hernandez P, Jimenez A, Courbin L, Gosse C, Artzner F, Marchi-Artzner V. Three-dimensional self-assembling of gold nanorods with controlled macroscopic shape and local smectic B order. ACS NANO 2012; 6:4137-4146. [PMID: 22497873 DOI: 10.1021/nn3006027] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe a method of controlled evaporation on a textured substrate for self-assembling and shaping gold-nanorod-based materials. Tridimensional wall features are formed over areas as large as several square millimeters. Furthermore, analyses by small-angle X-ray scattering and scanning electron microscopy techniques demonstrate that colloids are locally ordered as a smectic B phase. Such crystallization is in fact possible because we could finely adjust the nanoparticle charge, knowledge that additionally enables tuning the lattice parameters. In the future, the type of ordered self-assemblies of gold nanorods we have prepared could be used for amplifying optical signals.
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Affiliation(s)
- Cyrille Hamon
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université Rennes 1, Avenue du Général Leclerc, 35042 Rennes Cedex, France
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235
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Stoianov SV, Daengngam C, Borhani M, Zhang Y, Morris JR, Robinson HD. Amine-rich polyelectrolyte multilayers for patterned surface fixation of nanostructures. ACS APPLIED MATERIALS & INTERFACES 2012; 4:2348-2357. [PMID: 22475030 DOI: 10.1021/am300117f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe a lithographic method for directly patterning the adhesive properties of amine-rich layer-by-layer assembled polymer films, useful for positioning metal and other nanostructures. The adhesive properties of the films are sufficiently robust that the films can be patterned with standard as opposed to soft lithographic methods. We perform the patterning with a lithographically defined evaporated aluminum mask which protects selected regions of the substrate, passivating adhesion in the exposed regions with acetic anhydride. When the aluminum is removed with a HCl etch, the protected regions retain their adhesion, whereas particle adsorption is almost completely eliminated in the passivated areas, making it possible to guide adsorption to the protected areas. The high degree of adhesion comes about because of uncoordinated amine groups that pervade the film. Cycling the pH from high values to low and back causes the amines to be rearranged, rejuvenating the adhesive properties of the surface, which is the likely origin of the robustness of the adhesive properties to processing. pH adjustment also causes reversible swelling and deswelling of the film, so that the vertical position and dielectric environment of the nanostructure can be dynamically adjusted, which can be particularly beneficial for tuning the plasmonic resonances of metallic structures.
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Affiliation(s)
- Stefan V Stoianov
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
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236
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Spadavecchia J, Casale S, Boujday S, Pradier CM. Bioconjugated gold nanorods to enhance the sensitivity of FT-SPR-based biosensors. Colloids Surf B Biointerfaces 2012; 100:1-8. [PMID: 22750106 DOI: 10.1016/j.colsurfb.2012.03.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 03/21/2012] [Accepted: 03/22/2012] [Indexed: 12/23/2022]
Abstract
In this paper, we report a feasible solvent-free approach for the synthesis and self-assembling of gold nanorods after bioconjugation to antibodies; scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images revealed a remarkable shape and size narrow distribution, as well as a tendency to form linear assemblies on a clean gold surface, upon interaction with antibodies. These bioconjugated gold nanorods were in turns tested in a model Fourier Transform Surface Plasmon Resonance (FT-SPR)-based immunosensor, leading to an improvement of the detection sensitivity by a factor of 8. The results highlight the simplicity of the synthesis protocol of gold nanorods and the interest of using them as labels to enhance the sensitivity of SPR-based sensors.
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Affiliation(s)
- Jolanda Spadavecchia
- Laboratoire de Réactivité de Surface, UMR CNRS 7197, Université Pierre et Marie Curie-Paris VI, Paris, France.
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237
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Fraire JC, Pérez LA, Coronado EA. Rational design of plasmonic nanostructures for biomolecular detection: interplay between theory and experiments. ACS NANO 2012; 6:3441-3452. [PMID: 22452324 DOI: 10.1021/nn300474p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In this work, we report a simple strategy to obtain ultrasensitive SERS nanostructures by self-assembly and bioconjugation of Au nanospheres (NSs). Homodimer aggregates with an interparticle gap of around 8 nm are generated in aqueous dispersions by the highly specific molecular recognition of biotinylated Au NSs to streptavidin (STV), while random Au NS aggregates with a gap of 5 nm are formed in the absence of STV due to hydrogen bonding among biotinylated NSs. Both types of aggregates depict SERS analytical enhancement factors (AEF) of around 10(7) and the capability to detect biotin concentrations lower than 1 × 10(-12) M. Quite interesting, the AEF for an external analyte, Rhodamine 6G (RH6G), using the dimer aggregates is 1 order of magnitude greater (10(5)) than using random aggregates (around 10(4)). The dependence on the wavelength and the differences of the AEF for Au random aggregates and dimers are rationalized with rigorous electrodynamic simulations. The dimers obtained afford a new type of an in situ self-calibrated and reliable SERS substrate where biotinylated molecules can selectively be "trapped" by STV and located in the nanogap enhanced plasmonic field. Using this concept, powerful molecular-recognition-based SERS assays can be carried out. The capability of the dimeric structures for analytical applications is demonstrated using SPR spectroscopy to detect biotinylated immunoglobulin G at very low concentrations.
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Affiliation(s)
- Juan C Fraire
- INFIQC, Centro Laser de Ciencias Moleculares, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
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238
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Mishra A, Joshi R, Engelmann J, Logothetis NK. Synthesis and in vitro evaluation of a biotinylated dextran-derived probe for molecular imaging. ACS Chem Neurosci 2012; 3:268-73. [PMID: 22860193 DOI: 10.1021/cn200112v] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 01/16/2012] [Indexed: 11/30/2022] Open
Abstract
Herein we report the design, synthesis, and in vitro evaluation of a gadolinium-containing biotinylated dextran-derived molecular imaging probe as a prospective neuroanatomical tracer by means of magnetic resonance imaging (MRI). The probe was effectively taken up by cultured differentiated murine neuroblastoma cells and significantly enhanced the contrast in T(1)- and T(2)-weighted MR images of labeled cells under physiological conditions. A significant longitudinal relaxation rate enhancement in the presence of avidin was observed allowing the verification of the results in the end of noninvasive longitudinal MRI connectivity studies by post-mortem histology. The in vitro results indicate that the probe has the potential to be used in vivo to identify the organization of global neuronal networks in the brain with MRI.
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Affiliation(s)
| | | | | | - Nikos K. Logothetis
- Imaging Science and Biomedical
Engineering, University of Manchester,
Manchester M13 9PL, England
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239
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Wang J, Zhang P, Li CM, Li YF, Huang CZ. A highly selective and colorimetric assay of lysine by molecular-driven gold nanorods assembly. Biosens Bioelectron 2012; 34:197-201. [DOI: 10.1016/j.bios.2012.02.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 01/20/2012] [Accepted: 02/02/2012] [Indexed: 11/17/2022]
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240
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Kim DH, Wei A, Won YY. Preparation of Super-Stable Gold Nanorods via Encapsulation into Block Copolymer Micelles. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1872-1877. [PMID: 22471403 DOI: 10.1021/am300198v] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Gold nanorods (GNRs) have the potential to be used as imaging and hyperthermia agents for cancer theranostics. Clinical applications of as-synthesized GNRs (i.e., cetyl trimethylammonium bromide (CTAB)-coated GNRs) are currently limited by their cytotoxicity and insufficient colloidal stability. With an aim to address these problems, we developed a self-assembly processing technique for encapsulating GNRs in poly(ethylene oxide)-poly(n-butyl acrylate) (PEO-PnBA) block copolymer (BCP) micelles. This technique uses simple steps of solvent exchange processes, based on the known principles of block copolymer self-assembly. The resultant BCP-encapsulated GNRs were found to be stable against aggregation under physiological salt conditions for indefinite periods of time, which has rarely previously been achieved by other means of encapsulation.
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241
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Lee JH, Kim GH, Nam JM. Directional Synthesis and Assembly of Bimetallic Nanosnowmen with DNA. J Am Chem Soc 2012; 134:5456-9. [DOI: 10.1021/ja2121525] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jung-Hoon Lee
- Department
of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Gyeong-Hwan Kim
- Department
of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Jwa-Min Nam
- Department
of Chemistry, Seoul National University, Seoul 151-747, Korea
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242
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Petukhova A, Greener J, Liu K, Nykypanchuk D, Nicolaÿ R, Matyjaszewski K, Kumacheva E. Standing arrays of gold nanorods end-tethered with polymer ligands. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:731-737. [PMID: 22228672 DOI: 10.1002/smll.201101297] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 11/16/2011] [Indexed: 05/31/2023]
Abstract
Nanomaterials with vectoral electromagnetic properties have potential applications in solar cells, plasmonic cavity resonators, light polarizers, and biosensing. Here a new, simple, solution-based method for producing nanomaterials comprising vertically aligned standing arrays of gold nanorods (NRs) end-functionalized with polymer ligands is reported. The method utilizes the side-by-side assembly of the NRs into large 2D superlattices, followed by the precipitation of the lattices on a solid substrate. The critical design rules for the self-assembly of superlattices are demonstrated, and they show the generality of the method by forming standing arrays from the NRs end-tethered with poly(N-vinylcarbazole) or with polystyrene molecules.
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Affiliation(s)
- Alla Petukhova
- Department of Chemistry, University of Toronto, 80 Saint George street, Toronto, Ontario M5S 3H6, Canada
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243
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Chen B, Li F, Huang Z, Lu T, Yuan Y, Yu J, Yuan G. Self-assembled nanostructures of Ag6[PV3Mo9O40] with N-donor ligands and their catalytic activity. RSC Adv 2012. [DOI: 10.1039/c2ra21858e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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244
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Wang Y, Zeiri O, Meshi L, Stellacci F, Weinstock IA. Regioselective placement of alkanethiolate domains on tetrahedral and octahedral gold nanocrystals. Chem Commun (Camb) 2012; 48:9765-7. [DOI: 10.1039/c2cc34697d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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245
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Lazzara TD, Behn D, Kliesch TT, Janshoff A, Steinem C. Phospholipids as an alternative to direct covalent coupling: Surface functionalization of nanoporous alumina for protein recognition and purification. J Colloid Interface Sci 2012; 366:57-63. [DOI: 10.1016/j.jcis.2011.09.067] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/23/2011] [Accepted: 09/24/2011] [Indexed: 11/28/2022]
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246
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Newhouse RJ, Zhang JZ. Optical Properties and Applications of Shape-Controlled Metal Nanostructures. REVIEWS IN PLASMONICS 2012. [DOI: 10.1007/978-1-4614-0884-0_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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247
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Zhu Y, Kuang H, Xu L, Ma W, Peng C, Hua Y, Wang L, Xu C. Gold nanorodassembly based approach to toxin detection by SERS. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15238j] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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248
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Wang Y, Aili D, Selegård R, Tay Y, Baltzer L, Zhang H, Liedberg B. Specific functionalization of CTAB stabilized anisotropic gold nanoparticles with polypeptides for folding-mediated self-assembly. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31176c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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249
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Wu T, Zhang Q, Hu J, Zhang G, Liu S. Composite silica nanospheres covalently anchored with gold nanoparticles at the outer periphery of thermoresponsive polymer brushes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15530c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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250
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Tokonami S, Yamamoto Y, Shiigi H, Nagaoka T. Synthesis and bioanalytical applications of specific-shaped metallic nanostructures: a review. Anal Chim Acta 2011; 716:76-91. [PMID: 22284881 DOI: 10.1016/j.aca.2011.12.025] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 12/05/2011] [Accepted: 12/14/2011] [Indexed: 02/03/2023]
Abstract
Many successful synthesis routes for producing different shapes of metallic nanostructures, including sphere, rod, cube, and hollow shapes, have been developed in the past few decades. Many applications using these nanostructures have been studied because the outstanding properties of the nanostructures are not exhibited by their bulk-state counterparts. This review paper reports some recent developments in clinical and biosensor applications. The first part focused on the synthesis methods of metallic nanostructures having various shapes along with their optical properties. The second and third part is an introduction of the gold nanoparticle assemblies and arrays, explaining the conjugation methods of metallic nanostructures with biological entities. The final part reviews on the recent bioanalytical applications using various shapes of metallic nanostructures.
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Affiliation(s)
- Shiho Tokonami
- Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Sakai, Osaka, Japan
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