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Karelits M, Zalevsky Z, Karsenty A. Nano polarimetry: enhanced AFM-NSOM triple-mode polarimeter tip. Sci Rep 2020; 10:16201. [PMID: 33004833 PMCID: PMC7529902 DOI: 10.1038/s41598-020-72483-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 08/28/2020] [Indexed: 11/10/2022] Open
Abstract
A novel application of a combined and enhanced NSOM-AFM tip-photodetector system resulted in a nanoscale Polarimeter, generated by four different holes, each sharing a different shape, and enabling that the four photonic readouts forming the tip will be the four Stokes coefficients, this in order to place the polarization state in the Poincare sphere. The new system has been built on standard Atomic Force Microscope (AFM) cantilever, in order to serve as a triple-mode scanning system, sharing complementary scanning topography, optical data analysis and polarization states. This new device, which has been designed and simulated using Comsol Multi-Physics software package, consists in a Platinum-Silicon drilled conical photodetector, sharing subwavelength apertures, and has been processed using advanced nanotechnology tools on a commercial silicon cantilever. After a comparison study of drilled versus filled tips advantages, and of several optics phenomena such as interferences, the article presents the added value of multiple-apertures scanning tip for nano-polarimetry.
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Affiliation(s)
- Matityahu Karelits
- Department of Applied Physics/Electro-Optics Engineering, Advanced Laboratory of Electro-Optics (ALEO), Jerusalem College of Technology (JCT-Lev Academic Center), 9116001, Jerusalem, Israel
| | - Zeev Zalevsky
- Bar-Ilan University, Faculty of Engineering, 5290002, Ramat Gan, Israel.,Nanotechnology Center, Bar-Ilan University, 5290002, Ramat Gan, Israel
| | - Avi Karsenty
- Department of Applied Physics/Electro-Optics Engineering, Advanced Laboratory of Electro-Optics (ALEO), Jerusalem College of Technology (JCT-Lev Academic Center), 9116001, Jerusalem, Israel. .,Nanotechnology Educational and Research Center, Jerusalem College of Technology, 9116001, Jerusalem, Israel.
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Advanced Surface Probing Using a Dual-Mode NSOM-AFM Silicon-Based Photosensor. NANOMATERIALS 2019; 9:nano9121792. [PMID: 31888260 PMCID: PMC6956262 DOI: 10.3390/nano9121792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/10/2019] [Accepted: 12/14/2019] [Indexed: 11/17/2022]
Abstract
A feasibility analysis is performed for the development and integration of a near-field scanning optical microscope (NSOM) tip-photodetector operating in the visible wavelength domain of an atomic force microscope (AFM) cantilever, involving simulation, processing, and measurement. The new tip-photodetector consists of a platinum-silicon truncated conical photodetector sharing a subwavelength aperture, and processing uses advanced nanotechnology tools on a commercial silicon cantilever. Such a combined device enables a dual-mode usage of both AFM and NSOM measurements when collecting the reflected light directly from the scanned surface, while having a more efficient light collection process. In addition to its quite simple fabrication process, it is demonstrated that the AFM tip on which the photodetector is processed remains operational (i.e., the AFM imaging capability is not altered by the process). The AFM-NSOM capability of the processed tip is presented, and preliminary results show that AFM capability is not significantly affected and there is an improvement in surface characterization in the scanning proof of concept.
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Jiang B, Li C, Qian H, Hossain MSA, Malgras V, Yamauchi Y. Layer-by-Layer Motif Architectures: Programmed Electrochemical Syntheses of Multilayer Mesoporous Metallic Films with Uniformly Sized Pores. Angew Chem Int Ed Engl 2017; 56:7836-7841. [DOI: 10.1002/anie.201703609] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/03/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Bo Jiang
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Cuiling Li
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Huayu Qian
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Md. Shahriar A. Hossain
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Australian Institute for Innovative Materials (AIIM); University of Wollongong; Squires Way North Wollongong NSW 2500 Australia
| | - Victor Malgras
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Yusuke Yamauchi
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Australian Institute for Innovative Materials (AIIM); University of Wollongong; Squires Way North Wollongong NSW 2500 Australia
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Jiang B, Li C, Qian H, Hossain MSA, Malgras V, Yamauchi Y. Layer-by-Layer Motif Architectures: Programmed Electrochemical Syntheses of Multilayer Mesoporous Metallic Films with Uniformly Sized Pores. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703609] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Bo Jiang
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Cuiling Li
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Huayu Qian
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Md. Shahriar A. Hossain
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Australian Institute for Innovative Materials (AIIM); University of Wollongong; Squires Way North Wollongong NSW 2500 Australia
| | - Victor Malgras
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Yusuke Yamauchi
- International Center for Materials Nanoarchitectonic (MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Australian Institute for Innovative Materials (AIIM); University of Wollongong; Squires Way North Wollongong NSW 2500 Australia
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Ashry I, Zhang B, Khalifa MB, Calderone JA, Santos WL, Heflin JR, Robinson HD, Xu Y. Fluorescence lifetime based characterization of active and tunable plasmonic nanostructures. OPTICS EXPRESS 2014; 22:20720-20726. [PMID: 25321275 DOI: 10.1364/oe.22.020720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report a non-contact method that utilizes fluorescence lifetime (FL) to characterize morphological changes of a tunable plasmonic nanostructure with nanoscale accuracy. The key component of the plasmonic nanostructure is pH-responsive polyelectrolyte multilayers (PEMs), which serve as a dynamically tunable "spacer" layer that separates the plasmonic structure and the fluorescent materials. The validity of our method is confirmed through direct comparison with ellipsometry and atomic force microscopy (AFM) measurements. Applying the FL-based approach, we find that a monolayer polycation film responds to pH changes with significantly less hysteresis than a thicker multilayer film with polyelectrolytes of both charges. Additionally, we characterize an active and tunable plasmonic nanostructure composed of self-assembled fluorescent dye (Texas Red), pH-sensitive PEMs, and gold nanospheres adsorbed on the PEM surface. Our results point towards the possibility of using stimulus-sensitive polymers to construct active and tunable plasmonic nanodevices.
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Ashry I, Kandas I, Wei X, Calderone JA, Zhang B, Robinson HD, Heflin JR, Santos WL, Xu Y. Impact of lithography on the fluorescence dynamics of self-assembled fluorophores. OPTICS EXPRESS 2014; 22:12935-12943. [PMID: 24921491 DOI: 10.1364/oe.22.012935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Micro- and nano-patterned fluorescent materials are important for many photonic devices and applications. In this paper, we investigate the impact of three common lithographical techniques, deposition and removal of sacrificial masks, ultraviolet ablation, and focused ion beam milling, on self-assembled fluorophores. We find that different patterning techniques can dramatically change the fluorescence lifetime of the fluorophores and that the degree of modification depends on the patterning techniques.
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Krawicz A, Palazzo J, Wang GC, Dinolfo PH. Layer-by-layer assembly of Zn(ii) and Ni(ii) 5,10,15,20-tetra(4-ethynylphenyl)porphyrin multilayers on Au using copper catalyzed azide-alkyne cycloaddition. RSC Adv 2012. [DOI: 10.1039/c2ra20440a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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Trnavsky M, Enderlein J, Ruckstuhl T, McDonagh C, MacCraith BD. Experimental and theoretical evaluation of surface plasmon-coupled emission for sensitive fluorescence detection. JOURNAL OF BIOMEDICAL OPTICS 2008; 13:054021. [PMID: 19021401 DOI: 10.1117/1.2978067] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Surface plasmon-coupled emission (SPCE) is a phenomenon whereby the light emitted from a fluorescent molecule can couple into the surface plasmon of an adjacent metal layer, resulting in highly directional emission in the region of the surface plasmon resonance (SPR) angle. In addition to high directionality of emission, SPCE has the added advantage of surface selectivity in that the coupling diminishes with increasing distance from the surface. This effect can be exploited in bioassays whereby a fluorescing background from the sample can be suppressed. We have investigated, both theoretically and experimentally, the SPCE effect for a Cy5-spacer-Ag layer system. Both the angular dependence of emission and the dependence of SPCE emission intensity on Cy5-metal separation were investigated. It is demonstrated that SPCE leads to lower total fluorescence signal than that obtained in the absence of a metal layer. This is the first experimental verification of the reduction in SPCE intensity compared to the metal-free case. Our results are in a good agreement with theoretical models. The validation of the theoretical model provides a basis for optimizing biosensor platform performance, particularly in the context of the advantages offered by SPCE of highly directional emission and surface selectivity.
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Affiliation(s)
- Michal Trnavsky
- Dublin City University, Biomedical Diagnostics Institute, National Centre for Sensor Research, School of Physical Sciences, Glasnevin, Dublin 9, Ireland
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Ida S, Unal U, Izawa K, Altuntasoglu O, Ogata C, Inoue T, Shimogawa K, Matsumoto Y. Photoluminescence spectral change in layered titanate oxide intercalated with hydrated Eu3+. J Phys Chem B 2007; 110:23881-7. [PMID: 17125354 DOI: 10.1021/jp063412o] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A number of interesting photoluminescence properties of titanate layered oxide intercalated with hydrated Eu3+ have been demonstrated. Photoluminescence intensity of Eu3+ decreased rapidly with time during irradiation by UV light having energy higher than the band gap energy of the host TiO (Ti(1.81)O4) layer. This is presumably due to the decrease in energy transfer from the host TiO layer to Eu3+ as a result of the change in the hydration state of water molecules surrounding Eu3+, which is caused by the hole produced in the TiO valence band. When irradiation was discontinued, the emission intensity gradually recovered. The recovery time increased when the water in the interlayer is removed by heat treatment. This indicates that the state of interlayer water changes during irradiation and returns to its initial state after discontinuation of irradiation. The excitation spectra changed drastically at any given wavelength upon irradiation with UV light. A comparison of the excitation spectra before and after irradiation reveals that only the excitation peak at around the irradiation wavelength decreased upon irradiation, as in the case of spectral hole burning. The hydration state of water molecules surrounding Eu3+ presumably changes depending on the irradiation wavelength, leading to the above spectral change because the Eu/TiO film has a superlattice structure producing holes with different energies.
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Affiliation(s)
- Shintaro Ida
- Department of Nano Science and Technology, Graduate School of Science and Technology, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan.
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Cimatu K, Baldelli S. Sum Frequency Generation Microscopy of Microcontact-Printed Mixed Self-Assembled Monolayers. J Phys Chem B 2006; 110:1807-13. [PMID: 16471749 DOI: 10.1021/jp0562779] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Sum frequency generation imaging microscopy (SFGIM) is used to image the chemically distinct regions of a microcontact-printed monolayer surface. The contrast in the images is based on the vibrational spectrum of each component in the monolayer. Mixtures of C16 thiols on gold with CH3 and phenyl termination are imaged with a resolution of approximately 10 microm. Microcontact printing produces films that are different compared to the immersion procedure of forming self-assembled monolayers. The SFGIM technique is able to obtain a vibrational spectrum at each point on the surface and demonstrate that the stamped area has significant mixing with the molecules deposited from the backfilling solution.
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Affiliation(s)
- Katherine Cimatu
- Department of Chemistry, University of Houston, Houston, Texas 77204, USA
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Matsumoto Y, Unal U, Kimura Y, Ohashi S, Izawa K. Synthesis and Photoluminescent Properties of Titanate Layered Oxides Intercalated with Lanthanide Cations by Electrostatic Self-Assembly Methods. J Phys Chem B 2005; 109:12748-54. [PMID: 16852580 DOI: 10.1021/jp0517089] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Various lanthanide cations were intercalated into the interlayer of the exfoliated H(x)Ti((2-x)/4)) square(x/4)O(4) x H(2)O (HTO) by the electrostatic self-assembly deposition (ESD) and layer-by-layer self-assembly (LBL) methods. X-ray diffraction and thermal analysis data indicated that interlayer lanthanide cations existed as an aqua ion and were coordinated with 7-10 water molecules under ambient conditions. The interlayer distances were found to be in the range 6-7 Angstrom for HTO layered oxide intercalated with a lanthanide cation. Intercalation of lanthanide cations into the interlayer by the LBL method was monitored by UV-vis spectrum and X-ray diffraction. Photoluminescence properties were also discussed in detail. Eu(3+) intercalated layered oxide exhibited intense red emission at room temperature. The presence of interlayer water molecules was found to be inevitable for the emission with high intensity. The emission intensity was significantly higher for the films conditioned at 100% RH than those at 5% RH. The icelike behavior of the confined water molecules in the interlayer around lanthanide cations was believed to be contributing highly to the emission mechanism. The mechanism was illustrated and explained by data obtained under several conditions.
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Affiliation(s)
- Yasumichi Matsumoto
- Department of Applied Chemistry, Faculty of Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan
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Cheng W, Dong S, Wang E. Two- and Three-Dimensional Au Nanoparticle/CoTMPyP Self-Assembled Nanotructured Materials: Film Structure, Tunable Electrocatalytic Activity, and Plasmonic Properties. J Phys Chem B 2004. [DOI: 10.1021/jp0466237] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wenlong Cheng
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China
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Lowman GM, Nelson SL, Graves SM, Strouse GF, Buratto SK. Polyelectrolyte-quantum dot multilayer films fabricated by combined layer-by-layer assembly and Langmuir-Schaefer deposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:2057-2059. [PMID: 15835650 DOI: 10.1021/la035863v] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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15
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Zhang Y, Li G, Zhang L. Growth of Sb2O3Nanotubes via a Simple Surfactant-assisted Solvothermal Process. CHEM LETT 2004. [DOI: 10.1246/cl.2004.334] [Citation(s) in RCA: 23] [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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16
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Forzani ES, Teijelo ML, Nart F, Calvo EJ, Solís VM. Effect of the polycation nature on the structure of layer-by-layer electrostatically self-assembled multilayers of polyphenol oxidase. Biomacromolecules 2003; 4:869-79. [PMID: 12857067 DOI: 10.1021/bm0256855] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Self-assembled multilayers comprised of alternate layers of polyphenol oxidase (PPO) and poly(allylamine) (PAH) or PPO and poly(diallyldimethylamine) (PDDA), deposited on a 3-mercaptopropanesulfonic acid (MPS)-modified gold surface, were studied "in-situ" (under water) by means of ellipsometry and quartz crystal microbalance (QCM), and "ex-situ" (in open air) by ellipsometry and fourier transform infrared reflection-absorption spectroscopy (FT-IRRAS). Optical ellipsometric properties of (PAH)(n)(PPO)(n) and (PDDA)(n)(PPO)(n) multilayers were obtained at two wavelengths, employing an isotropic single-layer model with the substrate parameters measured after thiol adsorption. Film thickness as well as ellipsometric mass values based on the de Feijter equation were also evaluated. The quartz crystal impedance analysis showed that self-assembled multilayers behaved as acoustically thin films, and therefore, the shifts observed in the film inductive impedance parameter were interpreted in terms of gravimetric mass. The enzyme mass up-take in each adsorption step was determined on PAH or on PDDA topmost layer. A comparative study between the ellipsometric thickness and acoustic mass values allowed us to obtain average values of "apparent" densities of (2.1 +/- 0.1) and (2.4 +/- 0.1) g cm(-3) for (PAH)(n)(PPO)(n) and (PDDA)(n)(PPO)(n) multilayers, respectively. The content of water included in the open polymer-enzyme structure was evaluated by comparison of QCM and ellipsometric mass values. FT-IRRAS spectra of each layer in (PAH)(n)(PPO)(n) and (PDDA)(n)(PPO)(n) films were recorded, and the intensity ratio of the amide bands was evaluated to obtain information about layer-by-layer enzyme conformation. An enzyme/polycation distribution model for (PAH)(n)(PPO)(n)and (PDDA)(n)(PPO)(n) multilayer structures is presented on the basis of combined ellipsometric, QCM, and FT-IRRAS results.
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Affiliation(s)
- Erica S Forzani
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Pabellón 2, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina
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Mermut O, Barrett CJ. Effects of Charge Density and Counterions on the Assembly of Polyelectrolyte Multilayers. J Phys Chem B 2003. [DOI: 10.1021/jp027278t] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ozzy Mermut
- Department of Chemistry and Center for the Physics of Materials, McGill University, 801 Sherbrooke Street West, Montreal H3A 2K6, Canada
| | - Christopher J. Barrett
- Department of Chemistry and Center for the Physics of Materials, McGill University, 801 Sherbrooke Street West, Montreal H3A 2K6, Canada
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Chen X, Sun X, Li Y. Self-assembling vanadium oxide nanotubes by organic molecular templates. Inorg Chem 2002; 41:4524-30. [PMID: 12184770 DOI: 10.1021/ic020092o] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Vanadium oxide nanotubes were synthesized as the main product by hydrothermal self-assembling from ammonium metavanadate (NH(4)VO(3)) and organic molecules as structure-directing templates. Several kinds of templates including primary amines (C(n)H(2n+1)NH(2)), alpha,omega-diamines (H(2)N[CH(2)](n)NH(2)), and quaternary ammonium salt (CTAB) were demonstrated to be appropriate for the formation of nanotubes. The morphologies and structures of the nanotubes were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and thermal gravimetric analysis (TGA). The nanotubes were found forming together with the layered structures and the sheetlike structures. On the basis of the growth mechanism of WS(2) nanotubes proposed by our group, a possible rolling mechanism was proposed, which might be a suitable general formation mechanism for types of nanotubes from lamellar structures.
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Affiliation(s)
- Xing Chen
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
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Affiliation(s)
- V. Chikan
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-3701
| | - D. F. Kelley
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-3701
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Li YD, Li XL, He RR, Zhu J, Deng ZX. Artificial lamellar mesostructures to WS(2) nanotubes. J Am Chem Soc 2002; 124:1411-6. [PMID: 11841309 DOI: 10.1021/ja012055m] [Citation(s) in RCA: 295] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A direct pyrolysis method from artificial lamellar mesostructures to nanotubes was developed for the synthesis of tungsten disulfide (WS(2)) nanotubes. In this process, a tungsten sulfide artificial lamellar mesostructure composite with intercalated cetyltrimethylammonium cations (WS-L) was prepared on the basis of the recently developed template self-assembly of anionic tungstates (WS(4)(2-)) and cationic surfactant molecules (CTA(+)) in solution under appropriate conditions. After heating of this inorganic-surfactant lamellar composite material in an argon atmosphere to 850 degrees C, bulk quantities of uniform WS(2) nanotubes with diameters of 5-37.5 nm and lengths ranging from 0.2 to 5 microm were produced, which revealed a general rolling mechanism of layered sheets for tubule formation. The observations of transmission electron microscopy are in good agreement with the proposed rolling mechanism.
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Affiliation(s)
- Yadong D Li
- Department of Chemistry, Key Laboratory of Atomic & Molecular Nanosciences, Ministry of Education, Tsinghua University, Beijing 100084, People's Republic of China
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Glinel K, Laschewsky A, Jonas AM. Ordered Polyelectrolyte “Multilayers”. 3. Complexing Clay Platelets with Polycations of Varying Structure. Macromolecules 2001. [DOI: 10.1021/ma010123j] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. Glinel
- Unité de physique et de chimie des hauts polymères, Université catholique de Louvain, Place Croix du Sud, 1, B-1348 Louvain-la-Neuve, Belgium (European Union), and Département de chimie, Université catholique de Louvain, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium (European Union)
| | - A. Laschewsky
- Unité de physique et de chimie des hauts polymères, Université catholique de Louvain, Place Croix du Sud, 1, B-1348 Louvain-la-Neuve, Belgium (European Union), and Département de chimie, Université catholique de Louvain, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium (European Union)
| | - A. M. Jonas
- Unité de physique et de chimie des hauts polymères, Université catholique de Louvain, Place Croix du Sud, 1, B-1348 Louvain-la-Neuve, Belgium (European Union), and Département de chimie, Université catholique de Louvain, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium (European Union)
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Kolodny LA, Willard DM, Carillo LL, Nelson MW, Van Orden A. Spatially Correlated Fluorescence/AFM of Individual Nanosized Particles and Biomolecules. Anal Chem 2001; 73:1959-66. [PMID: 11354476 DOI: 10.1021/ac001472z] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Individual fluorescent polystyrene nanospheres (<10-100-nm diameter) and individual fluorescently labeled DNA molecules were dispersed on mica and analyzed using time-resolved fluorescence spectroscopy and atomic force microscopy (AFM). Spatial correlation of the fluorescence and AFM measurements was accomplished by (1) positioning a single fluorescent particle into the near diffraction-limited confocal excitation region of the optical microscope, (2) recording the time-resolved fluorescence emission, and (3) measuring the intensity of the excitation laser light scattered from the apex of an AFM probe tip and the AFM topography as a function of the lateral position of the tip relative to the sample substrate. The latter measurements resulted in concurrent high-resolution (approximately 10-20 nm laterally) images of the laser excitation profile of the confocal microscope and the topography of the sample. Superposition of these optical and topographical images enabled unambiguous identification of the sample topography residing within the excitation region of the optical microscope, facilitating the identification and structural characterization of the nanoparticle(s) or biomolecule(s) responsible for the fluorescence signal observed in step 2. These measurements also provided the lateral position of the particles relative to the laser excitation profile and the surrounding topography with nanometer-scale precision and the relationship between the spectroscopic and structural properties of the particles. Extension of these methods to the study of other types of nanostructured materials is discussed.
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Affiliation(s)
- L A Kolodny
- Department of Chemistry, Colorado State University, Fort Collins 80523, USA
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Aoki H, Ito S. Two-Dimensional Polymers Investigated by Scanning Near-Field Optical Microscopy: Phase Separation of Polymer Blend Monolayer. J Phys Chem B 2001. [DOI: 10.1021/jp0032412] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroyuki Aoki
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Shinzaburo Ito
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan
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24
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Ostrander JW, Mamedov AA, Kotov NA. Two modes of linear layer-by-layer growth of nanoparticle--polylectrolyte multilayers and different interactions in the layer-by-layer deposition. J Am Chem Soc 2001; 123:1101-10. [PMID: 11456663 DOI: 10.1021/ja0029578] [Citation(s) in RCA: 246] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The structure of the multilayer assemblies of yttrium iron garnet nanoparticles (YIG) with polyelectrolytes was investigated with the emphasis on the control of the particle density in the adsorption layers. It was found that the growth of YIG films prepared by the layer-by-layer assembly can occur via two deposition modes: (1) sequential adsorption of densely packed adsorption layers (normal growth mode) and (2) in-plane growth of isolated particle domains (lateral expansion mode). Importantly, the dependence of the optical density on the number of deposition cycles remains linear in both cases. Microscopy results indicate that the origin of the lateral growth is in the interplay of particle/particle and particle/polyelectrolyte interactions rather than in a substrate effect. The lateral expansion mode is a general attribute of the layer-by-layer deposition and can be observed for various aqueous colloids. For the preparation of sophisticated multifunctional assemblies on nanoparticles, the film growth via domain expansion should be avoided, and therefore, one must be able to control the growth pattern. The switch from lateral to normal growth mode can be effected by grafting charged organic groups to YIG nanoparticles. Hydrophobic interactions between the hydrocarbon groups of the modified YIG and polyelectrolyte significantly increase the attractive component of the particle/polyelectrolyte and particle/particle interactions. The films from modified YIG display densely packed nanoparticle layers with a greatly reduced number of defects.
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Affiliation(s)
- J W Ostrander
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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25
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Schlenoff JB, Dubas ST. Mechanism of Polyelectrolyte Multilayer Growth: Charge Overcompensation and Distribution. Macromolecules 2001. [DOI: 10.1021/ma0003093] [Citation(s) in RCA: 467] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph B. Schlenoff
- Chemistry Department and Center for Materials Research and Technology (MARTECH), The Florida State University, Tallahassee, Florida 32306-4390
| | - Stephan T. Dubas
- Chemistry Department and Center for Materials Research and Technology (MARTECH), The Florida State University, Tallahassee, Florida 32306-4390
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26
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Hara M, Waraksa CC, Lean JT, Lewis BA, Mallouk TE. Photocatalytic Water Oxidation in a Buffered Tris(2,2‘-bipyridyl)ruthenium Complex-Colloidal IrO2 System. J Phys Chem A 2000. [DOI: 10.1021/jp000321x] [Citation(s) in RCA: 255] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michikazu Hara
- Department of Chemistry, The Pennsylvania University, University Park, Pennsylvania 16802
| | - Chad C. Waraksa
- Department of Chemistry, The Pennsylvania University, University Park, Pennsylvania 16802
| | - John T. Lean
- Department of Chemistry, The Pennsylvania University, University Park, Pennsylvania 16802
| | - Bradley A. Lewis
- Department of Chemistry, The Pennsylvania University, University Park, Pennsylvania 16802
| | - Thomas E. Mallouk
- Department of Chemistry, The Pennsylvania University, University Park, Pennsylvania 16802
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27
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Credo GM, Lowman GM, DeAro JA, Carson PJ, Winn DL, Buratto SK. Probing nanoscale photo-oxidation in organic films using spatial hole burning near-field scanning optical microscopy. J Chem Phys 2000. [DOI: 10.1063/1.481391] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Aoki H, Sakurai Y, Ito S, Nakagawa T. Phase-Separation Structure of a Monolayer of Binary Polymer Blend Studied by Fluorescence Scanning Near-Field Optical Microscopy. J Phys Chem B 1999. [DOI: 10.1021/jp992228i] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroyuki Aoki
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Yuji Sakurai
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Shinzaburo Ito
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Tatsuo Nakagawa
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan
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29
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Affiliation(s)
- R C Dunn
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045
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30
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31
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Iverson IK, Tam-Chang SW. Cascade of Molecular Order by Sequential Self-Organization, Induced Orientation, and Order Transfer Processes. J Am Chem Soc 1999. [DOI: 10.1021/ja983803j] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Isaac K. Iverson
- Department of Chemistry, University of Nevada, Reno, Nevada 89557
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32
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Kaschak DM, Johnson SA, Waraksa CC, Pogue J, Mallouk TE. Artificial photosynthesis in lamellar assemblies of metal poly(pyridyl) complexes and metalloporphyrins. Coord Chem Rev 1999. [DOI: 10.1016/s0010-8545(99)00025-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
A new microscopic technique is demonstrated that combines attributes from both near-field scanning optical microscopy (NSOM) and fluorescence resonance energy transfer (FRET). The method relies on attaching the acceptor dye of a FRET pair to the end of a near-field fiber optic probe. Light exiting the NSOM probe, which is nonresonant with the acceptor dye, excites the donor dye introduced into a sample. As the tip approaches the sample containing the donor dye, energy transfer from the excited donor to the tip-bound acceptor produces a red-shifted fluorescence. By monitoring this red-shifted acceptor emission, a dramatic reduction in the sample volume probed by the uncoated NSOM tip is observed. This technique is demonstrated by imaging the fluorescence from a multilayer film created using the Langmuir-Blodgett (LB) technique. The film consists of L-alpha-dipalmitoylphosphatidylcholine (DPPC) monolayers containing the donor dye, fluorescein, separated by a spacer group of three arachidic acid layers. A DPPC monolayer containing the acceptor dye, rhodamine, was also transferred onto an NSOM tip using the LB technique. Using this modified probe, fluorescence images of the multilayer film reveal distinct differences between images collected monitoring either the donor or acceptor emission. The latter results from energy transfer from the sample to the NSOM probe. This method is shown to provide enhanced depth sensitivity in fluorescence measurements, which may be particularly informative in studies on thick specimens such as cells. The technique also provides a mechanism for obtaining high spatial resolution without the need for a metal coating around the NSOM probe and should work equally well with nonwaveguide probes such as atomic force microscopy tips. This may lead to dramatically improved spatial resolution in fluorescence imaging.
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Affiliation(s)
- S A Vickery
- Department of Chemistry, University of Kansas, Malott Hall, Lawrence, Kansas 66045, USA
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Kaschak DM, Lean JT, Waraksa CC, Saupe GB, Usami H, Mallouk TE. Photoinduced Energy and Electron Transfer Reactions in Lamellar Polyanion/Polycation Thin Films: Toward an Inorganic “Leaf”. J Am Chem Soc 1999. [DOI: 10.1021/ja982985e] [Citation(s) in RCA: 220] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David M. Kaschak
- Contribution from the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - John T. Lean
- Contribution from the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Chad C. Waraksa
- Contribution from the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Geoffrey B. Saupe
- Contribution from the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Hisanao Usami
- Contribution from the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Thomas E. Mallouk
- Contribution from the Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
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