1
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Bulut Y, Sochor B, Harder C, Reck K, Drewes J, Xu Z, Jiang X, Meinhardt A, Jeromin A, Kohantorabi M, Noei H, Keller TF, Strunskus T, Faupel F, Müller-Buschbaum P, Roth SV. Diblock copolymer pattern protection by silver cluster reinforcement. NANOSCALE 2023; 15:15768-15774. [PMID: 37740389 DOI: 10.1039/d3nr03215a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Pattern fabrication by self-assembly of diblock copolymers is of significant interest due to the simplicity in fabricating complex structures. In particular, polystyrene-block-poly-4-vinylpyridine (PS-b-P4VP) is a fascinating base material as it forms an ordered micellar structure on silicon surfaces. In this work, silver (Ag) is applied using direct current magnetron sputter deposition and high-power impulse magnetron sputter deposition on an ordered micellar PS-b-P4VP layer. The fabricated hybrid materials are structurally analyzed by field emission scanning electron microscopy, atomic force microscopy, and grazing incidence small angle X-ray scattering. When applying simple aqueous posttreatment, the pattern is stable and reinforced by Ag clusters, making micellar PS-b-P4VP ordered layers ideal candidates for lithography.
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Affiliation(s)
- Yusuf Bulut
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany
| | - Benedikt Sochor
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
| | - Constantin Harder
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany
| | - Kristian Reck
- Chair for Multicomponent Materials, Department of Materials Science, Faculty of Engineering, Christian-Albrechts Universität zu Kiel, Kaiserstr. 2, 24143 Kiel, Germany
| | - Jonas Drewes
- Chair for Multicomponent Materials, Department of Materials Science, Faculty of Engineering, Christian-Albrechts Universität zu Kiel, Kaiserstr. 2, 24143 Kiel, Germany
| | - Zhuijun Xu
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany
| | - Xiongzhuo Jiang
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany
| | - Alexander Meinhardt
- Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchtrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
- Department of Physics, University of Hamburg, Notkestr. 9-11, 22607 Hamburg, Germany
| | - Arno Jeromin
- Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchtrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Mona Kohantorabi
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchtrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Heshmat Noei
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchtrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Thomas F Keller
- Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchtrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
- Department of Physics, University of Hamburg, Notkestr. 9-11, 22607 Hamburg, Germany
| | - Thomas Strunskus
- Chair for Multicomponent Materials, Department of Materials Science, Faculty of Engineering, Christian-Albrechts Universität zu Kiel, Kaiserstr. 2, 24143 Kiel, Germany
| | - Franz Faupel
- Chair for Multicomponent Materials, Department of Materials Science, Faculty of Engineering, Christian-Albrechts Universität zu Kiel, Kaiserstr. 2, 24143 Kiel, Germany
| | - Peter Müller-Buschbaum
- Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergerstraße 1, 85748 Garching, Germany
| | - Stephan V Roth
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden
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2
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Chen S, Hu K, Yan S, Ma T, Deng X, Zhang W, Yin J, Jiang X. Dynamic metal patterns of wrinkles based on photosensitive layers. Sci Bull (Beijing) 2022; 67:2186-2195. [DOI: 10.1016/j.scib.2022.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/24/2022] [Accepted: 10/20/2022] [Indexed: 11/17/2022]
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3
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Mariano A, Bovio CL, Criscuolo V, Santoro F. Bioinspired micro- and nano-structured neural interfaces. NANOTECHNOLOGY 2022; 33:492501. [PMID: 35947922 DOI: 10.1088/1361-6528/ac8881] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
The development of a functional nervous system requires neurons to interact with and promptly respond to a wealth of biochemical, mechanical and topographical cues found in the neural extracellular matrix (ECM). Among these, ECM topographical cues have been found to strongly influence neuronal function and behavior. Here, we discuss how the blueprint of the architectural organization of the brain ECM has been tremendously useful as a source of inspiration to design biomimetic substrates to enhance neural interfaces and dictate neuronal behavior at the cell-material interface. In particular, we focus on different strategies to recapitulate cell-ECM and cell-cell interactions. In order to mimic cell-ECM interactions, we introduce roughness as a first approach to provide informative topographical biomimetic cues to neurons. We then examine 3D scaffolds and hydrogels, as softer 3D platforms for neural interfaces. Moreover, we will discuss how anisotropic features such as grooves and fibers, recapitulating both ECM fibrils and axonal tracts, may provide recognizable paths and tracks that neuron can follow as they develop and establish functional connections. Finally, we show how isotropic topographical cues, recapitulating shapes, and geometries of filopodia- and mushroom-like dendritic spines, have been instrumental to better reproduce neuron-neuron interactions for applications in bioelectronics and neural repair strategies. The high complexity of the brain architecture makes the quest for the fabrication of create more biologically relevant biomimetic architectures in continuous and fast development. Here, we discuss how recent advancements in two-photon polymerization and remotely reconfigurable dynamic interfaces are paving the way towards to a new class of smart biointerfaces forin vitroapplications spanning from neural tissue engineering as well as neural repair strategies.
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Affiliation(s)
- Anna Mariano
- Tissue Electronics, Istituto Italiano di Tecnologia, I-80125 Naples, Italy
| | - Claudia Latte Bovio
- Tissue Electronics, Istituto Italiano di Tecnologia, I-80125 Naples, Italy
- Dipartimento di Chimica, Materiali e Produzione Industriale, Università di Napoli Federico II, I-80125, Naples, Italy
| | - Valeria Criscuolo
- Faculty of Electrical Engineering and IT, RWTH Aachen, D-52074, Germany
| | - Francesca Santoro
- Tissue Electronics, Istituto Italiano di Tecnologia, I-80125 Naples, Italy
- Faculty of Electrical Engineering and IT, RWTH Aachen, D-52074, Germany
- Institute for Biological Information Processing-Bioelectronics, Forschungszentrum Juelich, D-52428, Germany
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4
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Zare I, Yaraki MT, Speranza G, Najafabadi AH, Haghighi AS, Nik AB, Manshian BB, Saraiva C, Soenen SJ, Kogan MJ, Lee JW, Apollo NV, Bernardino L, Araya E, Mayer D, Mao G, Hamblin MR. Gold nanostructures: synthesis, properties, and neurological applications. Chem Soc Rev 2022; 51:2601-2680. [PMID: 35234776 DOI: 10.1039/d1cs01111a] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent advances in technology are expected to increase our current understanding of neuroscience. Nanotechnology and nanomaterials can alter and control neural functionality in both in vitro and in vivo experimental setups. The intersection between neuroscience and nanoscience may generate long-term neural interfaces adapted at the molecular level. Owing to their intrinsic physicochemical characteristics, gold nanostructures (GNSs) have received much attention in neuroscience, especially for combined diagnostic and therapeutic (theragnostic) purposes. GNSs have been successfully employed to stimulate and monitor neurophysiological signals. Hence, GNSs could provide a promising solution for the regeneration and recovery of neural tissue, novel neuroprotective strategies, and integrated implantable materials. This review covers the broad range of neurological applications of GNS-based materials to improve clinical diagnosis and therapy. Sub-topics include neurotoxicity, targeted delivery of therapeutics to the central nervous system (CNS), neurochemical sensing, neuromodulation, neuroimaging, neurotherapy, tissue engineering, and neural regeneration. It focuses on core concepts of GNSs in neurology, to circumvent the limitations and significant obstacles of innovative approaches in neurobiology and neurochemistry, including theragnostics. We will discuss recent advances in the use of GNSs to overcome current bottlenecks and tackle technical and conceptual challenges.
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Affiliation(s)
- Iman Zare
- Research and Development Department, Sina Medical Biochemistry Technologies Co. Ltd., Shiraz 7178795844, Iran
| | | | - Giorgio Speranza
- CMM - FBK, v. Sommarive 18, 38123 Trento, Italy.,IFN - CNR, CSMFO Lab., via alla Cascata 56/C Povo, 38123 Trento, Italy.,Department of Industrial Engineering, University of Trento, v. Sommarive 9, 38123 Trento, Italy
| | - Alireza Hassani Najafabadi
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA 90064, USA.,Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Alireza Shourangiz Haghighi
- Department of Mechanical Engineering, Shiraz University of Technology, Modarres Boulevard, 13876-71557, Shiraz, Iran
| | - Amirala Bakhshian Nik
- Department of Biomedical Engineering, Florida International University, Miami, FL 33174, USA
| | - Bella B Manshian
- Translational Cell and Tissue Research Unit, Department of Imaging and Pathology, KU Leuven, Herestraat 49, B3000 Leuven, Belgium
| | - Cláudia Saraiva
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 Avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg.,Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marques d'Avila e Bolama, 6201-001 Covilha, Portugal
| | - Stefaan J Soenen
- NanoHealth and Optical Imaging Group, Department of Imaging and Pathology, KU Leuven, Herestraat 49, B3000 Leuven, Belgium
| | - Marcelo J Kogan
- Advanced Center for Chronic Diseases (ACCDiS), Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Farmacológica y Toxicológica, Universidad de Chile, 8380492 Santiago, Chile
| | - Jee Woong Lee
- Department of Medical Sciences, Clinical Neurophysiology, Uppsala University, Uppsala, SE-751 23, Sweden
| | - Nicholas V Apollo
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.,School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Liliana Bernardino
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marques d'Avila e Bolama, 6201-001 Covilha, Portugal
| | - Eyleen Araya
- Departamento de Ciencias Quimicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. Republica 275, Santiago, Chile
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Germany
| | - Guangzhao Mao
- School of Chemical Engineering, University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
| | - Michael R Hamblin
- Laser Research Center, University of Johannesburg, Doorfontein 2028, South Africa.
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5
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Shi J, Shen M, Zhao W, Liu J, Qu Z, Zhu M, Chen Z, Shi P, Zhang Z, Zhang SS. Ultrasensitive Dual-Signal Detection of Telomerase and MiR-21 Based on Boolean Logic Operations. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51393-51402. [PMID: 34665612 DOI: 10.1021/acsami.1c17912] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Telomerase and micro-RNAs (miRNAs) are simultaneously upregulated in a variety of tumor cells and have emerged as promising tumor markers. However, sensitive detection of telomerase and miRNAs in situ remains a great challenge due to their low expression levels. Here, we designed a Boolean logic "AND" signal amplification strategy based on functionalized ordered mesoporous nanoparticles (FOMNs) to achieve ultrasensitive detection of telomerase and miR-21 in living tumor cells. Briefly, the strategy uses telomerase as an input to enable the release of DNA3-ROX-BHQ hairpins by making the wrapping DNA1 form a DNA-a hairpin with the joint participation of dNTPs. Subsequently, DNA2-Ag, DNA3-ROX-BHQ, and the second input miR-21 participated in hybridization chain reaction to amplify fluorescence and Raman signals. Experimental results showed the intensity of output dual signals relevant to the expression levels of telomerase and miR-21. The Ag nanoparticles (AgNPs) not only enhanced the fluorescence signals but also allowed to obtain more sensitive Raman signals. Therefore, even if expression of tumor markers is at a low level, the FOMN-based dual-signal logic operation strategy can still achieve sensitive detection of telomerase and miR-21 in situ. Furthermore, FOMNs can detect miR-21 expression levels in a short time. Consequently, this strategy has a potential clinical application value in detection of tumor markers and the assessment of tumor treatment efficacy.
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Affiliation(s)
- Jiaju Shi
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
| | - Meiqi Shen
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
| | - Wenjie Zhao
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Jinhua Liu
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Zongjin Qu
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
| | - Mengting Zhu
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
| | - Zichao Chen
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Pengfei Shi
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
| | - Zhen Zhang
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Shu-Sheng Zhang
- Shandong Province Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P. R. China
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6
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Liang Y, Lin C, Guan J, Li Y. Silver nanoparticle-immobilized porous POM/PLLA nanofibrous membranes: efficient catalysts for reduction of 4-nitroaniline. RSC Adv 2017. [DOI: 10.1039/c6ra28167b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
Silver nanoparticle-immobilized porous POM/PLLA NFMs were successfully prepared and used as efficient catalysts for the reduction of 4-nitroaniline.
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Affiliation(s)
- Yuanyuan Liang
- College of Material, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou
- China
| | - Chuanxin Lin
- College of Material, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou
- China
| | - Jipeng Guan
- College of Material, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou
- China
| | - Yongjin Li
- College of Material, Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou
- China
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7
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Han X, Hou J, Xie J, Yin J, Tong Y, Lu C, Möhwald H. Synergism of Dewetting and Self-Wrinkling To Create Two-Dimensional Ordered Arrays of Functional Microspheres. ACS APPLIED MATERIALS & INTERFACES 2016; 8:16404-16411. [PMID: 27300307 DOI: 10.1021/acsami.6b03036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we report a simple, novel, yet robust nonlithographic method for the controlled fabrication of two-dimensional (2-D) ordered arrays of polyethylene glycol (PEG) microspheres. It is based on the synergistic combination of two bottom-up processes enabling periodic structure formation for the first time: dewetting and the mechanical wrinkle formation. The deterministic dewetting results from the hydrophilic polymer PEG on an incompatible polystyrene (PS) film bound to a polydimethylsiloxane (PDMS) substrate, which is directed both by a wrinkled template and by the template-directed in-situ self-wrinkling PS/PDMS substrate. Two strategies have been introduced to achieve synergism to enhance the 2-D ordering, i.e., employing 2-D in-situ self-wrinkling substrates and boundary conditions. As a result, we achieve highly ordered 2-D arrays of PEG microspheres with desired self-organized microstructures, such as the array location (e.g., selectively on the crest/in the valley of the wrinkles), diameter, spacing of the microspheres, and array direction. Additionally, the coordination of PEG with HAuCl4 is utilized to fabricate 2-D ordered arrays of functional PEG-HAuCl4 composite microspheres, which are further converted into different Au nanoparticle arrays. This simple versatile combined strategy could be extended to fabricate highly ordered 2-D arrays of other functional materials and achieve desirable properties and functionalities.
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Affiliation(s)
- Xue Han
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
| | - Jing Hou
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
| | - Jixun Xie
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
| | - Jian Yin
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
| | - Yi Tong
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
| | - Conghua Lu
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
| | - Helmuth Möhwald
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces , Potsdam 14424, Germany
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8
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Wang LW, Cheng CF, Liao JW, Wang CY, Wang DS, Huang KF, Lin TY, Ho RM, Chen LJ, Lai CH. Thermal dewetting with a chemically heterogeneous nano-template for self-assembled L1(0) FePt nanoparticle arrays. NANOSCALE 2016; 8:3926-3935. [PMID: 26837410 DOI: 10.1039/c5nr08339g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A design for the fabrication of metallic nanoparticles is presented by thermal dewetting with a chemically heterogeneous nano-template. For the template, we fabricate a nanostructured polystyrene-b-polydimethylsiloxane (PS-b-PDMS) film on a Si|SiO2 substrate, followed by a thermal annealing and reactive ion etching (RIE) process. This gives a template composed of an ordered hexagonal array of SiOC hemispheres emerging in the polystyrene matrix. After the deposition of a FePt film on this template, we utilize the rapid thermal annealing (RTA) process, which provides in-plane stress, to achieve thermal dewetting and structural ordering of FePt simultaneously. Since the template is composed of different composition surfaces with periodically varied morphologies, it offers more tuning knobs to manipulate the nanostructures. We show that both the decrease in the area of the PS matrix and the increase in the strain energy relaxation transfer the dewetted pattern from the randomly distributed nanoparticles into a hexagonal periodic array of L10 FePt nanoparticles. Transmission electron microscopy with the in situ heating stage reveals the evolution of the dewetting process, and confirms that the positions of nanoparticles are aligned with those of the SiOC hemispheres. The nanoparticles formed by this template-dewetting show an average diameter and center-to-center distance of 19.30 ± 2.09 nm and 39.85 ± 4.80 nm, respectively. The hexagonal array of FePt nanoparticles reveals a large coercivity of 1.5 T, much larger than the nanoparticles fabricated by top-down approaches. This approach offers an efficient pathway toward self-assembled nanostructures in a wide range of material systems.
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Affiliation(s)
- Liang-Wei Wang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Chung-Fu Cheng
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Jung-Wei Liao
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Chiu-Yen Wang
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Ding-Shuo Wang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Kuo-Feng Huang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Tzu-Ying Lin
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Lih-Juann Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Chih-Huang Lai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
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Lee W, Kinosita Y, Oh Y, Mikami N, Yang H, Miyata M, Nishizaka T, Kim D. Three-Dimensional Superlocalization Imaging of Gliding Mycoplasma mobile by Extraordinary Light Transmission through Arrayed Nanoholes. ACS NANO 2015; 9:10896-10908. [PMID: 26469129 DOI: 10.1021/acsnano.5b03934] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this paper, we describe super-resolved sampling of live bacteria based on extraordinary optical transmission (EOT) of light. EOT is produced by surface plasmon confinement and coupling with nanostructures. Bacterial fluorescence is excited by the localized fields for subdiffraction-limited sampling. The concept was applied to elucidating bacterial dynamics of gliding Mycoplasma mobile (M. mobile). The results analyzed with multiple M. mobile bacteria show individual characters and reveal that M. mobile undergoes a significant axial variation at 94 nm. The sampling error of the method is estimated to be much smaller than 1/10 of the diffraction limit both in the lateral and depth axis. The method provides a powerful tool for investigation of biomolecular dynamics at subwavelength precision.
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Affiliation(s)
- Wonju Lee
- School of Electrical and Electronic Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | | | - Youngjin Oh
- School of Electrical and Electronic Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | - Nagisa Mikami
- Department of Physics, Gakushuin University , Tokyo 171-8588, Japan
| | - Heejin Yang
- School of Electrical and Electronic Engineering, Yonsei University , Seoul 120-749, Republic of Korea
| | - Makoto Miyata
- Department of Biology, Graduate School of Science, Osaka City University , Osaka 558-8585, Japan
| | | | - Donghyun Kim
- School of Electrical and Electronic Engineering, Yonsei University , Seoul 120-749, Republic of Korea
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10
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Byeon JH, Park D, Kim JY. An aerosol-based soft lithography to fabricate nanoscale silver dots and rings for spectroscopic applications. NANOSCALE 2015; 7:2271-2275. [PMID: 25578812 DOI: 10.1039/c4nr07476a] [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
Site-selective deposition of aerosol Pd nanoparticles on a substrate was employed to fabricate nanoscale Ag dots and rings through a subsequent electroless deposition. The fabricated nanoscale dot and ring arrays respectively showed properties in surface-enhanced Raman (SER, with a 1.8 × 10(5) enhancement factor) and Fourier transform near infrared (FT-NIR, at 6153 cm(-1) absorption band) spectra.
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Affiliation(s)
- Jeong Hoon Byeon
- School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea.
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11
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Wang P, Zhou Y, Wen Y, Wang F, Yang H. In situ polydopamine-assisted deposition of silver nanoparticles on a two dimensional support as an inexpensive and highly efficient SERS substrate. RSC Adv 2015. [DOI: 10.1039/c5ra03481g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Versatile substrates were modified with polydopamine followed by in situ AgNP deposition to fabricate a cheap, flexible and disposable SERS substrate.
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Affiliation(s)
- Peilan Wang
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Department of Chemistry
- Shanghai Normal University
| | - Yanling Zhou
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Department of Chemistry
- Shanghai Normal University
| | - Ying Wen
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Department of Chemistry
- Shanghai Normal University
| | - Feng Wang
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Department of Chemistry
- Shanghai Normal University
| | - Haifeng Yang
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- Department of Chemistry
- Shanghai Normal University
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12
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Fang L, Li Y, Chen Z, Liu W, Zhang J, Xiang S, Shen H, Li Z, Yang B. Tunable polymer brush/Au NPs hybrid plasmonic arrays based on host-guest interaction. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19951-19957. [PMID: 25347749 DOI: 10.1021/am505434u] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The fabrication of versatile gold nanoparticle (Au NP) arrays with tunable optical properties by a novel host-guest interaction are presented. The gold nanoparticles were incorporated into polymer brushes by host-guest interaction between β-cyclodextrin (β-CD) ligand of gold nanoparticles and dimethylamino group of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA). The gold nanoparticle arrays were prepared through the template of PDMAEMA brush patterns which were fabricated combining colloidal lithography and surface-initiated atom-transfer radical polymerization (SI-ATRP). The structure parameters of gold nanoparticle patterns mediated by polymer brushes such as height, diameters, periods and distances, could be easily tuned by tailoring the etching time or size of colloidal spheres in the process of colloidal lithography. The change of optical properties induced by different gold nanoparticle structures was demonstrated. The direct utilization of PDMAEMA brushes as guest avoids a series of complicated modification process and the PDMAEMA brushes can be grafted on various substrates, which broaden its applications. The prepared gold naoparticle arrays are promising in applications of nanosensors, memory storage and surface enhanced spectroscopy.
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Affiliation(s)
- Liping Fang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China
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13
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Liu Y, Hu W, Lu Z, Li CM. ZnO nanomulberry and its significant nonenzymatic signal enhancement for protein microarray. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7728-7734. [PMID: 24766196 DOI: 10.1021/am501015p] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
It is very challenging to make a highly sensitive protein microarray because of its lack of a universal signal amplification method like PCR used in DNA microarray. The current strategies to improve the sensitivity mainly rely on a unique nanostructured substrate or enzymatically catalyzed signal amplification, of which the former requires a complicated and time-consuming fabrication process while the latter suffers from high cost and poor stability of enzymes as well as downstream biochemical reactions. In this work, an inexpensive ZnO nanomulberry (NMB) decorated glass slide is investigated as a superior substrate to nonenzymatically amplify the signal of protein microarray for sensitive detection, accomplishing a limit of detection (LOD) of 1 pg mL(-1) and a broad dynamic range of 1 pg mL(-1) to 1 μg mL(-1) to detect an important cancer biomarker, carcinoembryonic antigen (CEA) in 10% human serum. The excellent performance is attributed to ZnO NMB possessing high-density loading of capture antibody and intrinsic enhancement of fluorescence emission. The substrate preparation is simple without using any expensive equipment and complicated technique while offering advantages of low autofluorescence, versatility for various fluorophores, and excellent compatibility with existing microarray fabrication techniques. Thus, a ZnO NMB based protein microarray holds great promise for developing a low cost, sensitive, and high throughput protein assay platform for broad applications in both fundamental research and clinical diagnosis.
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Affiliation(s)
- Yingshuai Liu
- Institute for Clean Energy and Advanced Materials, Southwest University , No. 2 Tiansheng Road, Chongqing 400715, China
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14
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Byeon JH, Kim JW. Fabrication of bimetallic nanostructures via aerosol-assisted electroless silver deposition for catalytic CO conversion. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3105-3110. [PMID: 24564168 DOI: 10.1021/am500047n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bimetallic nanostructures were fabricated via aerosol-assisted electroless silver deposition for catalytic CO conversion. An ambient spark discharge was employed to produce nanocatalysts, and the particles were directly deposited on a polytetrafluoroethylene substrate for initiating silver deposition to form Pd-Ag, Pt-Ag, Au-Ag bimetallic nanostructures as well as a pure Ag nanostructure. Kinetics and morphological evolutions in the silver deposition with different nanocatalysts were comparatively studied. The Pt catalyst displayed the highest catalytic activity for electroless silver deposition, followed by the order Pd > Au > Ag. Another catalytic activity of the fabricated bimetallic structures in the carbon monoxide conversion was further evaluated at low-temperature conditions. The bimetallic systems showed significantly higher catalytic activity than that from a pure Ag system.
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Affiliation(s)
- Jeong Hoon Byeon
- Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
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15
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Rizzello L, Cingolani R, Pompa PP. Nanotechnology tools for antibacterial materials. Nanomedicine (Lond) 2013; 8:807-21. [DOI: 10.2217/nnm.13.63] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The understanding of the interactions between biological systems and nanoengineered devices is crucial in several research fields, including tissue engineering, biomechanics, synthetic biology and biomedical devices. This review discusses the current knowledge of the interactions between bacteria and abiotic nanostructured substrates. First, the effects of randomly organized nanoscale topography on bacterial adhesion and persistence are described. Second, the interactions between microorganisms and highly organized/ordered micro- and nano-patterns are discussed. Finally, we survey the most promising approaches for the fabrication of silver polymeric nanocomposites, which have important applications as antimicrobial materials. The advantages, drawbacks and limitations of such nanotechnologies are critically discussed in view of potential future applications.
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Affiliation(s)
- Loris Rizzello
- Center for Bio-Molecular Nanotechnology, Istituto Italiano di Tecnologia, Via Barsanti, 1-73010 Arnesano (Lecce), Italy
| | - Roberto Cingolani
- Istituto Italiano di Tecnologia, Central Research Laboratories, Via Morego, 30-16136 Genova, Italy
| | - Pier Paolo Pompa
- Center for Bio-Molecular Nanotechnology, Istituto Italiano di Tecnologia, Via Barsanti, 1-73010 Arnesano (Lecce), Italy.
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16
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Wang J, Duan G, Li Y, Liu G, Dai Z, Zhang H, Cai W. An invisible template method toward gold regular arrays of nanoflowers by electrodeposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3512-3517. [PMID: 23451855 DOI: 10.1021/la400433z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new approach, an invisible template method that is realized through controlling the interface electroconductivity of an electrode surface, is presented to synthesize gold regular arrays of nanoflowers with variable separations through further electrochemical deposition. Using polystyrene monolayer colloidal crystals as the first template, a hexagonally packed 1-hexadecanethiol pattern was self-assembled and used as an invisible template to control the interface electroconductivity. Further electrochemical deposition under appropriate conditions can easily lead to gold regular arrays of nanoflowers. This new approach demonstrates a simple route to the fabrication of novel gold micro/nanostructured arrays that may find applications as SERS active substrates, superhydrophobic materials, and so forth.
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Affiliation(s)
- Jingjing Wang
- Key Lab of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, PR China
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17
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Valentini P, Pompa PP. Gold nanoparticles for naked-eye DNA detection: smart designs for sensitive assays. RSC Adv 2013. [DOI: 10.1039/c3ra43729a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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18
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Gilles S, Winter S, Michael KE, Meffert SH, Li P, Greben K, Simon U, Offenhäusser A, Mayer D. Control of cell adhesion and neurite outgrowth by patterned gold nanoparticles with tunable attractive or repulsive surface properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:3357-67. [PMID: 22826008 DOI: 10.1002/smll.201200465] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 04/24/2012] [Indexed: 05/06/2023]
Abstract
Guiding of neuronal cells on surfaces is required for the investigation of fundamental aspects of neurobiology, for tissue engineering, and for numerous bioelectronic applications. A modular method to establish nanostructured chemical templates for local deposition of gold nanoparticles is presented. A process comprising nanoimprint lithography, silanization, lift-off, and gold nanoparticle immobilization is used to fabricate the particle patterns. The chemical composition of the surface can be modified by in situ adsorption of cell-binding ligands to locally addressed particles. The versatility of this approach is demonstrated by inverting the binding affinity between rat cortical neurons and nanopatterned surfaces via wet-chemical means and thereby reversing the pattern of guided neurons.
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Affiliation(s)
- Sandra Gilles
- Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
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19
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Rizzello L, Galeone A, Vecchio G, Brunetti V, Sabella S, Pompa PP. Molecular response of Escherichia coli adhering onto nanoscale topography. NANOSCALE RESEARCH LETTERS 2012; 7:575. [PMID: 23078758 PMCID: PMC3552789 DOI: 10.1186/1556-276x-7-575] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 10/10/2012] [Indexed: 05/23/2023]
Abstract
Bacterial adhesion onto abiotic surfaces is an important issue in biology and medicine since understanding the bases of such interaction represents a crucial aspect in the design of safe implant devices with intrinsic antibacterial characteristics. In this framework, we investigated the effects of nanostructured metal substrates on Escherichia coli adhesion and adaptation in order to understand the bio-molecular dynamics ruling the interactions at the interface. In particular, we show how highly controlled nanostructured gold substrates impact the bacterial behavior in terms of morphological changes and lead to modifications in the expression profile of several genes, which are crucially involved in the stress response and fimbrial synthesis. These results mainly demonstrate that E. coli cells are able to sense even slight changes in surface nanotopography and to actively respond by activating stress-related pathways. At the same time, our findings highlight the possibility of designing nanoengineered substrates able to trigger specific bio-molecular effects, thus opening the perspective of smartly tuning bacterial behavior by biomaterial design.
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Affiliation(s)
- Loris Rizzello
- Center for Bio-Molecular Nanotechnologies, Instituto Italiano di Tecnologia@UniLe, Via Barsanti, Arnesano, Lecce, 73010, Italy
| | - Antonio Galeone
- Center for Bio-Molecular Nanotechnologies, Instituto Italiano di Tecnologia@UniLe, Via Barsanti, Arnesano, Lecce, 73010, Italy
| | - Giuseppe Vecchio
- Center for Bio-Molecular Nanotechnologies, Instituto Italiano di Tecnologia@UniLe, Via Barsanti, Arnesano, Lecce, 73010, Italy
| | - Virgilio Brunetti
- Center for Bio-Molecular Nanotechnologies, Instituto Italiano di Tecnologia@UniLe, Via Barsanti, Arnesano, Lecce, 73010, Italy
| | - Stefania Sabella
- Center for Bio-Molecular Nanotechnologies, Instituto Italiano di Tecnologia@UniLe, Via Barsanti, Arnesano, Lecce, 73010, Italy
| | - Pier Paolo Pompa
- Center for Bio-Molecular Nanotechnologies, Instituto Italiano di Tecnologia@UniLe, Via Barsanti, Arnesano, Lecce, 73010, Italy
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20
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Kim S, Lee S, Ko J, Son J, Kim M, Kang S, Hong J. Nanoscale patterning of complex magnetic nanostructures by reduction with low-energy protons. NATURE NANOTECHNOLOGY 2012; 7:567-571. [PMID: 22820741 DOI: 10.1038/nnano.2012.125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 06/18/2012] [Indexed: 06/01/2023]
Abstract
Techniques that can produce patterns with nanoscale details on surfaces have a central role in the development of new electronic, optical and magnetic devices and systems. High-energy ion irradiation can produce nanoscale patterns on ferromagnetic films by destroying the structure of layers or interfaces, but this approach can damage the film and introduce unwanted defects. Moreover, ferromagnetic nanostructures that have been patterned by ion irradiation often interfere with unpatterned regions through exchange interactions, which results in a loss of control over magnetization switching. Here, we demonstrate that low-energy proton irradiation can pattern an array of 100-nm-wide single ferromagnetic domains by reducing [Co(3)O(4)/Pd](10) (a paramagnetic oxide) to produce [Co/Pd](10) (a ferromagnetic metal). Moreover, there are no exchange interactions in the final superlattice, and the ions have a minimal impact on the overall structure, so the interfaces between alternate layers of cobalt (which are 0.6 nm thick) and palladium (1.0 nm) remain intact. This allows the reduced [Co/Pd](10) superlattice to produce a perpendicular magnetic anisotropy that is stronger than that observed in the metallic [Co/Pd](10) superlattices we prepared for reference. We also demonstrate that our non-destructive approach can reduce CoFe(2)O(4) to metallic CoFe.
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Affiliation(s)
- Sanghoon Kim
- Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea
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21
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Byeon JH, Roberts JT. Silver deposition on a polymer substrate catalyzed by singly charged monodisperse copper nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2012; 4:2515-2520. [PMID: 22496487 DOI: 10.1021/am300217n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Aerosol deposition of singly charged monodisperse copper nanoparticles was used to catalytically activate a polymer substrate for electroless silver deposition. An ambient spark discharge was used to produce aerosol copper nanoparticles, and the particles were electrostatically classified at an equivalent mobility diameter of 10 nm, using a nanodifferential mobility analyzer. Deposition of the copper particles onto the surface of the substrate was enhanced by thermophoresis. The copper-deposited substrate was then immersed in a Ag(I) solution, resulting in the electroless deposition of silver (∼17 μm line width) on the previously deposited copper (∼12 μm line width, using a shadow mask with a 100 μm in width patterned stripe). The arithmetic mean roughness and electrical resistivity of the silver pattern were 44.7 nm and 7.9 μΩ cm, respectively, which showed an enhancement compared to those from the nonclassified copper particles (roughness = 162.2 nm, resistivity = 13.3 μΩ cm), because of a more-uniform copper deposition.
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Affiliation(s)
- Jeong Hoon Byeon
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2067, USA
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22
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Choudhury SD, Badugu R, Ray K, Lakowicz JR. Silver-Gold Nanocomposite Substrates for Metal-Enhanced Fluorescence: Ensemble and Single-Molecule Spectroscopic Studies. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2012; 116:5042-5048. [PMID: 22707999 PMCID: PMC3374657 DOI: 10.1021/jp212242x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In recent years, there has been a growing interest in the studies involving the interactions of fluorophores with plasmonic nanostructures or nanoparticles. These interactions lead to several favorable effects such as increase in the fluorescence intensities, increased photostabilities, and reduced excited-state lifetimes that can be exploited to improve the capabilities of present fluorescence methodologies. In this regard, we report the use of newly developed silver-gold nanocomposite (Ag-Au-NC) structures as substrates for metal-enhanced fluorescence (MEF). The Ag-Au-NC substrates have been prepared by a one-step galvanic replacement reaction from thin silver films coated on glass slides. This approach is simple and suitable for the fabrication of MEF substrates with large area. We have observed about 15-fold enhancement in the fluorescence intensity of ATTO655 from ensemble fluorescence measurements using these substrates. The fluorescence enhancement on the Ag-Au-NC substrates is also accompanied by a reduction in the fluorescence lifetime of ATTO655, which is consistent with the fluorophore-plasmon coupling mechanism. Single-molecule fluorescence measurements have been performed to gain more insight into the metal-fluorophore interactions and to unravel the heterogeneity in the interaction of individual fluorophores with the fabricated substrates. The single-molecule studies are in good agreement with the ensemble measurements and show maximum enhancements of ~50-fold for molecules located in proximity to the "hotspots" on the substrates. In essence, the Ag-Au-NC substrates have a very good potential for various MEF applications.
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Affiliation(s)
- Sharmistha Dutta Choudhury
- Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland Baltimore, 725 West Lombard Street, Baltimore, Maryland 21201, United States
| | - Ramachandram Badugu
- Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland Baltimore, 725 West Lombard Street, Baltimore, Maryland 21201, United States
| | - Krishanu Ray
- Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland Baltimore, 725 West Lombard Street, Baltimore, Maryland 21201, United States
| | - Joseph R. Lakowicz
- Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland Baltimore, 725 West Lombard Street, Baltimore, Maryland 21201, United States
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23
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24
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Gogoi SK, Borah SM, Dey KK, Paul A, Chattopadhyay A. Optically definable reaction-diffusion-driven pattern generation of Ag-Au nanoparticles on templated surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12263-12269. [PMID: 21899314 DOI: 10.1021/la202447x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We introduce a new lithographic method for the generation of 2D patterns of composite nanoparticles (NPs) of Ag and Au by taking recourse to combine top-down and bottom-up approaches. Micrometer-scale and submicrometer-scale patterned Ag foils of commercially available compact disks (CDs) and digital versatile disks (DVDs), respectively, were used as templates. The galvanic replacement reaction of Ag by HAuCl(4) in the presence of the dye coatings on the foils led to the formation of patterned NP composites of Ag and Au, in addition to the formation of AgCl. The resultant structures appeared in the form of cross patterns of particles with micrometer and submicrometer dimensions. The AgCl crystals thus formed could be removed by using either a saturated NaCl solution or aqueous ammonia. In addition, AgCl could be converted to Ag by electrochemical reduction, thus generating Ag-coated Au NPs. Interestingly, the digital writing on CDs led to the formation of tertiary imprints on the patterns, based on the original writing patterns. This provided an additional handle in generating hierarchical patterns using light in combination with a chemical reaction diffusion process and the nearly parallel line patterns originally present in commercial CDs. The reactions could be carried out in aqueous solution, and the method does not require any additional curing. Also, the density of patterned particles is scalable on the basis of the choice of the original line patterns as present in CDs and DVDs.
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Affiliation(s)
- Sonit Kumar Gogoi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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25
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Woo CG, Shin H, Jeong C, Jun K, Lee J, Lee JR, Lee H, You S, Son Y, Choi M. Selective nanopatterning of protein via ion-induced focusing and its application to metal-enhanced fluorescence. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:1790-1794. [PMID: 21567946 DOI: 10.1002/smll.201100543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Indexed: 05/30/2023]
Affiliation(s)
- Chang Gyu Woo
- National CRI Center for Nano Particle Control, Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea
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26
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Hu W, Liu Y, Yang H, Zhou X, Li CM. ZnO nanorods-enhanced fluorescence for sensitive microarray detection of cancers in serum without additional reporter-amplification. Biosens Bioelectron 2011; 26:3683-7. [DOI: 10.1016/j.bios.2011.01.045] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 01/13/2011] [Accepted: 01/29/2011] [Indexed: 11/26/2022]
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27
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Rizzello L, Sorce B, Sabella S, Vecchio G, Galeone A, Brunetti V, Cingolani R, Pompa PP. Impact of nanoscale topography on genomics and proteomics of adherent bacteria. ACS NANO 2011; 5:1865-76. [PMID: 21344880 DOI: 10.1021/nn102692m] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Bacterial adhesion onto inorganic/nanoengineered surfaces is a key issue in biotechnology and medicine, because it is one of the first necessary steps to determine a general pathogenic event. Understanding the molecular mechanisms of bacteria-surface interaction represents a milestone for planning a new generation of devices with unanimously certified antibacterial characteristics. Here, we show how highly controlled nanostructured substrates impact the bacterial behavior in terms of morphological, genomic, and proteomic response. We observed by atomic force microscopy (AFM) and scanning electron microscopy (SEM) that type-1 fimbriae typically disappear in Escherichia coli adherent onto nanostructured substrates, as opposed to bacteria onto reference glass or flat gold surfaces. A genetic variation of the fimbrial operon regulation was consistently identified by real time qPCR in bacteria interacting with the nanorough substrates. To gain a deeper insight into the molecular basis of the interaction mechanisms, we explored the entire proteomic profile of E. coli by 2D-DIGE, finding significant changes in the bacteria adherent onto the nanorough substrates, such as regulations of proteins involved in stress processes and defense mechanisms. We thus demonstrated that a pure physical stimulus, that is, a nanoscale variation of surface topography, may play per se a significant role in determining the morphological, genetic, and proteomic profile of bacteria. These data suggest that in depth investigations of the molecular processes of microorganisms adhering to surfaces are of great importance for the design of innovative biomaterials with active biological functionalities.
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Affiliation(s)
- Loris Rizzello
- Italian Institute of Technology, Center for Bio-Molecular Nanotechnology, Via Barsanti-73010 Arnesano, Lecce, Italy
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28
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Ohzono T, Monobe H, Fukuda N, Fujiwara M, Shimizu Y. Formation of peelable rough gold patterns on an ionic liquid template. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:506-513. [PMID: 21246715 DOI: 10.1002/smll.201002072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Indexed: 05/30/2023]
Abstract
The ability to control metal patterns at the micro- and nanoscales, along with the development of a simple fabrication method, is important to many applications in the fields of materials science, biological sensing, electronics, and photonics. Herein, a simple approach to fabricating gold micropatterns with controlled roughness is reported. In this approach, gold is evaporated onto a striped liquid micropattern formed on self-organized microwrinkles. Gold nanoribbons with higher roughness form on the liquid part of the substrate because the deposited gold atoms can diffuse, grow, and aggregate at the liquid-air interface, whereas flat gold films form on the solid part. The rough gold nanoribbons formed on the liquid can then be peeled off through contact with water. The extinction spectrum of the rough gold nanoribbons suggests characteristic surface-plasmon absorption. This shows the possibility of using rough gold nanoribbons with controlled shape in plasmonic technology.
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Affiliation(s)
- Takuya Ohzono
- NanoSystem Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Japan.
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29
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Hu W, Li CM. Nanomaterial-based advanced immunoassays. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 3:119-133. [DOI: 10.1002/wnan.124] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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30
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Lee JY, Lee J, Jang YJ, Lee J, Jang YH, Kochuveedu ST, Park C, Kim DH. Controlling the composition of plasmonic nanoparticle arrays via galvanic displacement reactions on block copolymer nanotemplates. Chem Commun (Camb) 2011; 47:1782-4. [DOI: 10.1039/c0cc04369a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Leonov AP, Wei A. Photolithography of Dithiocarbamate-Anchored Monolayers and Polymers on Gold. ACTA ACUST UNITED AC 2011; 21:4371-4376. [PMID: 21894240 DOI: 10.1039/c0jm04153j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dithiocarbamate (DTC)-anchored monolayers and polymers were investigated as positive resists for UV photolithography on planar and roughened Au surfaces. DTCs were formed in situ by the condensation of CS(2) with monovalent or polyvalent amines such as linear polyethyleneimine (PEI) under mildly basic aqueous conditions, just prior to surface passivation. The robust adsorption of the polyvalent PEI-DTC to Au surfaces supported high levels of resistance to photoablation, providing opportunities to generate thin films with gradient functionality. Treatment of photopatterned substrates with alkanethiols produced binary coatings, enabling a direct visual comparison of DTC- and thiol-passivated surfaces against chemically induced corrosion using confocal microscopy.
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Affiliation(s)
- Alexei P Leonov
- Department of Chemistry, 560 Oval Drive, Purdue University, West Lafayette, Indiana 47907-2084
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32
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Ye C, Li M, Xue M, Shen W, Cao T, Song Y, Jiang L. Flexible Au nanoparticle arrays induced metal-enhanced fluorescence towards pressure sensors. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03176c] [Citation(s) in RCA: 24] [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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33
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Leong K, Zin MT, Ma H, Sarikaya M, Huang F, Jen AKY. Surface plasmon enhanced fluorescence of cationic conjugated polymer on periodic nanoarrays. ACS APPLIED MATERIALS & INTERFACES 2010; 2:3153-3159. [PMID: 21062036 DOI: 10.1021/am100635v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The fluorescence from conjugated polymer assembled onto lithographically fabricated gold nanoarrays using genetically engineered peptides as molecular linkers is studied. A 16-fold increase in the photoluminescence of the conjugated polymer is observed when assembled on the optimized nanostructures due to surface plasmon enhanced fluorescence. This is achieved using a water-soluble cationic conjugated polymer, poly[(9,9-bis(6'-((N,N,N-trimethylammonium)hexyl)-2,7-fluorene)-co-4,7-di-2-thienyl-2,1,3-benzothiadiazole] dibromide (PFDBT-N(+)), systematically tuning the vertical distance of PFDBT-N(+) from the gold nanopillar surface using solid-specific peptide linkers and horizontally optimizing the localized surface plasmon resonance by varying the geometric arrangements of the patterned metal nanoarrays. The diameter and tip-to-tip spacing of the nanopillars along with vertically tuning the distance of PFDBT-N(+) from the nanopillar affected the observed fluorescence enhancements. The collective optical properties of conjugated polymers combined with the photonic properties of nanoparticles provide a new means in the development of metal enhanced hybrid nanomaterials for biotechnology.
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Affiliation(s)
- Kirsty Leong
- Departments of Chemistry and Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, USA
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Jung JM, Yoo HW, Stellacci F, Jung HT. Two-photon excited fluorescence enhancement for ultrasensitive DNA detection on large-area gold nanopatterns. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:2542-6. [PMID: 20461719 DOI: 10.1002/adma.200903745] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Affiliation(s)
- Jin-Mi Jung
- Department of Chemical and Biomolecular Engineering (BK-21), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
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Kim J, Dantelle G, Revaux A, Bérard M, Huignard A, Gacoin T, Boilot JP. Plasmon-induced modification of fluorescent thin film emission nearby gold nanoparticle monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:8842-8849. [PMID: 20230040 DOI: 10.1021/la904612r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
When placed in the vicinity of metal nanoparticles, fluorophore molecules can have their fluorescence intensity enhanced. In order to engineer highly fluorescent thin films, surface plasmon enhancement fluorescence was studied on macroscopic systems composed of gold nanoparticles deposited on a substrate and coated by a dye-containing polymer film. We developed a simple method based on surface silanization to get a good dispersion of up to 100 nm gold nanoparticles on a substrate. While controlling the nanoparticle size and the fluorophore concentration, we measured the fluorescence enhancement factors of systems doped with dyes possessing different quantum yields. We evidenced experimentally that a fluorescence enhancement factor of 4 could be reached for a low-quantum yield dye and that the fluorophore quantum yield affects significantly the enhancement factor. We then discussed how our experimental results agree with previously developed models.
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Affiliation(s)
- Jongwook Kim
- Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France.
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Yang B, Lu N, Qi D, Ma R, Wu Q, Hao J, Liu X, Mu Y, Reboud V, Kehagias N, Torres CMS, Boey FYC, Chen X, Chi L. Tuning the intensity of metal-enhanced fluorescence by engineering silver nanoparticle arrays. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:1038-43. [PMID: 20394069 DOI: 10.1002/smll.200902350] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
It is demonstrated that silver nanoparticle (SNP) arrays fabricated by combining nanoimprint lithography and electrochemical deposition methods can be used as substrates for metal-enhanced fluorescence, which is widely used in optics, sensitive detection, and bioimaging. The method presented here is simple and efficient at controlling the nanoparticle density and interparticle distance within one array. Furthermore, it is found that the fluorescence intensity can be tuned by engineering the feature size of the SNP arrays. This is due to the different coupling efficiency between the emission of the fluorophores and surface plasmon resonance band of the metallic nanostructures.
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Affiliation(s)
- Bingjie Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
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Abstract
The interaction between cells and nanostructured materials is attracting increasing interest, because of the possibility to open up novel concepts for the design of smart nanobiomaterials with active biological functionalities. In this frame we investigated the response of human neuroblastoma cell line (SH-SY5Y) to gold surfaces with different levels of nanoroughness. To achieve a precise control of the nanoroughness with nanometer resolution, we exploited a wet chemistry approach based on spontaneous galvanic displacement reaction. We demonstrated that neurons sense and actively respond to the surface nanotopography, with a surprising sensitivity to variations of few nanometers. We showed that focal adhesion complexes, which allow cellular sensing, are strongly affected by nanostructured surfaces, leading to a marked decrease in cell adhesion. Moreover, cells adherent on nanorough surfaces exhibit loss of neuron polarity, Golgi apparatus fragmentation, nuclear condensation, and actin cytoskeleton that is not functionally organized. Apoptosis/necrosis assays established that nanoscale features induce cell death by necrosis, with a trend directly related to roughness values. Finally, by seeding SH-SY5Y cells onto micropatterned flat and nanorough gold surfaces, we demonstrated the possibility to realize substrates with cytophilic or cytophobic behavior, simply by fine-tuning their surface topography at nanometer scale. Specific and functional adhesion of cells occurred only onto flat gold stripes, with a clear self-alignment of neurons, delivering a simple and elegant approach for the design and development of biomaterials with precise nanostructure-triggered biological responses.
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Zhang G, Sun S, Ionescu MI, Liu H, Zhong Y, Li R, Sun X. Controlled growth/patterning of Ni nanohoneycombs on various desired substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:4346-4350. [PMID: 20039686 DOI: 10.1021/la9034408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report a two-step process for the growth/patterning of Ni honeycomb nanostructures on various substrates, such as carbon paper, carbon nanotubes (CNTs), silicon wafers, and copper grids, via the combination of a sputter-coating/patterning technique and a replacement reaction solution method. The morphology, crystallinity, and chemical composition of the honeycombs were analyzed by SEM, TEM, high-resolution TEM, and EDX. These honeycombs are composed of numerous nanocells, several tens of nanometers in diameter and with cell wall thickness of approximately 10 nm, randomly connecting to each other. The growth process of honeycomb nanostructures has been systematically studied. Interestingly, the diameter and wall thickness of the cells could be easily tuned by simply adjusting the experimental parameters, such as the concentrations and cations of metal salts. Additionally, this simple method has been successfully extended to synthesize Co nanostructures with well-controlled morphologies, which indicates the great potential of this strategy in the synthesis of other metal nanostructures on various desired substrates. These metal-substrate composites, especially with desired patterns, are expected to be ideal candidates for wide application in modern electronic and optoelectronic devices, sensors, fuel cells, and energy storage systems.
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Affiliation(s)
- Gaixia Zhang
- Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ontario, N6A 5B9, Canada
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Wan D, Chen HL, Tseng SC, Wang LA, Chen YP. One-shot deep-UV pulsed-laser-induced photomodification of hollow metal nanoparticles for high-density data storage on flexible substrates. ACS NANO 2010; 4:165-173. [PMID: 19968294 DOI: 10.1021/nn9013005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this paper, we report a new optical data storage method: photomodification of hollow gold nanoparticle (HGN) monolayers induced by one-shot deep-ultraviolet (DUV) KrF laser recording. As far as we are aware, this study is the first to apply HGNs in optical data storage and also the first to use a recording light source for the metal nanoparticles (NPs) that is not a surface plasmon resonance (SPR) wavelength. The short wavelength of the recording DUV laser improved the optical resolution dramatically. We prepared HGNs exhibiting two absorbance regions: an SPR peak in the near-infrared (NIR) region and an intrinsic material extinction in the DUV region. A single pulse from a KrF laser heated the HGNs and transformed them from hollow structures to smaller solid spheres. This change in morphology for the HGNs was accompanied by a significant blue shift of the SPR peak. Employing this approach, we demonstrated its patterning ability with a resolving power of a half-micrometer (using a phase mask) and developed a readout method (using a blue-ray laser microscope). Moreover, we prepared large-area, uniform patterns of monolayer HGNs on various substrates (glass slides, silicon wafers, flexible plates). If this spectral recording technique could be applied onto thin flexible tapes, the recorded data density would increase significantly relative to that of current rigid discs (e.g., compact discs).
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Affiliation(s)
- Dehui Wan
- Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan
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Cerf A, Molnár G, Vieu C. Novel approach for the assembly of highly efficient SERS substrates. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2544-50. [PMID: 20356125 DOI: 10.1021/am900476d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this paper we present the properties of surface-enhanced Raman scattering (SERS) active substrates elaborated by a low-cost approach. Our methodology relying on capillary assembly and soft lithography allows us to generate periodic two-dimensional (2D) matrixes of 100 nm gold nanoparticle patterns in a very precise, cost-efficient, and large-scale manner. For this study, we assembled nanoparticle aggregates of different sizes (one to six particles) in order to determine the influence of the aggregation on the local electric field enhancement. We further demonstrate that this substrate is greatly efficient not only for SERS but also in metal-enhanced fluorescence (MEF) for local enhancement of conventional fluorescence.
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Affiliation(s)
- Aline Cerf
- CNRS, LAAS, 7, avenue du Colonel Roche, F-31077 Toulouse, France.
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