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Zhang Z, Zhu R, Tang Y, Su Z, Hu S, Zhang X, Zhang J, Zhao J, Xue Y, Gao X, Li G, Pascual J, Abate A, Li M. Anchoring Charge Selective Self-Assembled Monolayers for Tin-Lead Perovskite Solar Cells. Adv Mater 2024; 36:e2312264. [PMID: 38281081 DOI: 10.1002/adma.202312264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/29/2023] [Indexed: 01/29/2024]
Abstract
Self-assembled monolayers (SAMs) have displayed great potential for improving efficiency and stability in p-i-n perovskite solar cells (PSCs). The anchoring of SAMs at the conductiv metal oxide substrates and their interaction with perovskite materials must be rationally tailored to ensure efficient charge carrier extraction and improved quality of the perovskite films. Herein, SAMs molecules with different anchoring groups and spacers to control the interaction with perovskite in the p-i-n mixed Sn-Pb PSCs are selected. It is found that the monolayer with the carboxylate group exhibits appropriate interaction and has a more favorable orientation and arrangement than that of the phosphate group. This results in reduced nonradiative recombination and enhanced crystallinity. In addition, the short chain length leads to an improved energy level alignment of SAMs with perovskite, improving hole extraction. As a result, the narrow bandgap (≈1.25 eV) Sn-Pb PSCs show efficiencies of up to 23.1% with an open-circuit voltage of up to 0.89 V. Unencapsulated devices retain 93% of their initial efficiency after storage in N2 atmosphere for over 2500 h. Overall, this work highlights the underexplored potential of SAMs for perovskite photovoltaics and provides essential findings on the influence of their structural modification.
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Affiliation(s)
- Zuhong Zhang
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
| | - Rui Zhu
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
| | - Ying Tang
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
| | - Zhenhuang Su
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai, 201204, P. R. China
| | - Shuaifeng Hu
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Xu Zhang
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
| | - Junhan Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai, 201204, P. R. China
| | - Jinbo Zhao
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
| | - Yunchang Xue
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
| | - Xingyu Gao
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 239 Zhangheng Road, Shanghai, 201204, P. R. China
| | - Guixiang Li
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Jorge Pascual
- POLYMAT, University of the Basque Country UPV/EHU, Tolosa Avenue, 72, Donostia-San Sebastián, 20018, Spain
| | - Antonio Abate
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Meng Li
- Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China
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Palkowitz AL, Tuna T, Kaufmann R, Buhl EM, Wolfart S, Fischer H. Functionalization of a zirconia surface by covalently immobilized fibronectin and its effects on resistance to thermal, acid, and mechanical exposure. J Biomed Mater Res B Appl Biomater 2024; 112:e35390. [PMID: 38356151 DOI: 10.1002/jbm.b.35390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 01/08/2024] [Accepted: 01/27/2024] [Indexed: 02/16/2024]
Abstract
Silane chemistry has emerged as a powerful tool for surface modification, offering a versatile means to enhance the properties of various substrates, such as dental implant abutment materials. In this study, we investigated the stability of the 3-aminopropyldiisopropylethoxysilane (APDS) layer on yttria-partially stabilized zirconia (Y-TZP) surfaces after mechanical, acid, and thermal treatment in order to simulate fluctuations within the oral cavity. To accomplish that, the viability of human gingival fibroblasts on APDS-modified surfaces after applied treatment strategies was assessed by live/dead staining. Moreover, the hydrolysis stability and enzymatic degradation resistance of crosslinked fibronectin to the APDS layer was examined by immunostaining and western blot. The results revealed that the applied modifications were not affected by the different treatment conditions and could withstand the fluctuations in the oral cavity. Furthermore, crosslinked fibronectin on silanized Y-TZP was stable against hydrolysis over 21 days and enzymatic degradation. We thus can conclude that the proposed functionalization method has high potential to tolerate harmful effects within the oral cavity and remains unchanged on the surface.
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Affiliation(s)
- Alena L Palkowitz
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Aachen, Germany
| | - Taskin Tuna
- Department of Prosthodontics and Biomaterials, RWTH Aachen University Hospital, Aachen, Germany
| | - Robert Kaufmann
- DWI Leibniz-Institute for Interactive Materials, RWTH Aachen University, Aachen, Germany
| | - Eva Miriam Buhl
- Electron Microscopy Facility, Institute of Pathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Stefan Wolfart
- Department of Prosthodontics and Biomaterials, RWTH Aachen University Hospital, Aachen, Germany
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Aachen, Germany
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3
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Wolf NR, Yuan X, Hassani H, Milos F, Mayer D, Breuer U, Offenhäusser A, Wördenweber R. Surface Functionalization of Platinum Electrodes with APTES for Bioelectronic Applications. ACS Appl Bio Mater 2020; 3:7113-7121. [PMID: 35019371 DOI: 10.1021/acsabm.0c00936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interface between electronic components and biological objects plays a crucial role in the success of bioelectronic devices. Since the electronics typically include different elements such as an insulating substrate in combination with conducting electrodes, an important issue of bioelectronics involves tailoring and optimizing the interface for any envisioned applications. In this paper, we present a method for functionalizing insulating substrates (SiO2) and metallic electrodes (Pt) simultaneously with a stable monolayer of organic molecules ((3-aminopropyl)triethoxysilane (APTES)). This monolayer is characterized by high molecule density, long-term stability, and positive surface net charge and most likely represents a self-assembled monolayer (SAM). It facilitates the conversion of biounfriendly Pt surfaces into biocompatible surfaces, which allows cell growth (neurons) on both functionalized components, SiO2 and Pt, which is comparable to that of reference samples coated with poly-L-lysine (PLL). Moreover, the functionalization greatly improves the electronic cell-chip coupling, thereby enabling the recording of action potential signals of several millivolts at APTES-functionalized Pt electrodes.
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Affiliation(s)
- Nikolaus R Wolf
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Xiaobo Yuan
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Hossein Hassani
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Frano Milos
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Uwe Breuer
- Central Institute for Engineering, Electronics and Analytics-Analytics (ZEA-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Roger Wördenweber
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
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4
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Liamas E, Kubiak-Ossowska K, Black RA, Thomas ORT, Zhang ZJ, Mulheran PA. Adsorption of Fibronectin Fragment on Surfaces Using Fully Atomistic Molecular Dynamics Simulations. Int J Mol Sci 2018; 19:E3321. [PMID: 30366398 DOI: 10.3390/ijms19113321] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/15/2018] [Accepted: 10/23/2018] [Indexed: 01/02/2023] Open
Abstract
The effect of surface chemistry on the adsorption characteristics of a fibronectin fragment (FNIII8⁻10) was investigated using fully atomistic molecular dynamics simulations. Model surfaces were constructed to replicate self-assembled monolayers terminated with methyl, hydroxyl, amine, and carboxyl moieties. It was found that adsorption of FNIII8⁻10 on charged surfaces is rapid, specific, and driven by electrostatic interactions, and that the anchoring residues are either polar uncharged or of opposing charge to that of the targeted surfaces. On charged surfaces the presence of a strongly bound layer of water molecules and ions hinders FNIII8⁻10 adsorption. In contrast, adsorption kinetics on uncharged surfaces are slow and non-specific, as they are driven by van der Waals interactions, and the anchoring residues are polar uncharged. Due to existence of a positively charged area around its cell-binding region, FNIII8⁻10 is available for subsequent cell binding when adsorbed on a positively charged surface, but not when adsorbed on a negatively charged surface. On uncharged surfaces, the availability of the fibronectin fragment's cell-binding region is not clearly distinguished because adsorption is much less specific.
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Chinwangso P, St Hill LR, Marquez MD, Lee TR. Unsymmetrical Spiroalkanedithiols Having Mixed Fluorinated and Alkyl Tailgroups of Varying Length: Film Structure and Interfacial Properties. Molecules 2018; 23:E2632. [PMID: 30322175 PMCID: PMC6222720 DOI: 10.3390/molecules23102632] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 09/19/2018] [Accepted: 09/25/2018] [Indexed: 02/01/2023] Open
Abstract
A custom-designed series of unsymmetrical spiroalkanedithiols having tailgroups comprised of a terminally fluorinated chain and a hydrocarbon chain of varying lengths were synthesized and used to prepare self-assembled monolayers (SAMs) on gold substrates. The specific structure of the adsorbates was of the form [CH₃(CH₂)n][CF₃(CF₂)₇(CH₂)₈]C[CH₂SH]₂, where n = 7, 9, and 15 (designated as F8H10-C10, F8H10-C12, and F8H10-C18, respectively). The influence of the length of the hydrocarbon chain in the bidentate dithiol on the structure and interfacial properties of the monolayer was explored. A structurally analogous partially fluorinated monodentate alkanethiol and the corresponding normal alkanethiols were used to generate appropriate SAMs as reference systems. Measurements of ellipsometric thickness showed an unexpectedly low film thickness for the SAMs derived from the bidentate adsorbates, possibly due to disruptions in interchain packing caused by the fluorocarbon chains (i.e., phase-incompatible fluorocarbon-hydrocarbon interactions), ultimately giving rise to loosely packed and disordered films. Analysis by X-ray photoelectron spectroscopy (XPS) were also consistent with a model in which the films were loosely packed; additionally, the XPS spectra confirmed the attachment of the sulfur headgroups of the bidentate adsorbates onto the gold substrates. Studies of the SAMs by polarization modulation-infrared reflection-adsorption spectroscopy (PM-IRRAS) suggested that as the length of the hydrocarbon chain in the adsorbates was extended, a more ordered surface was achieved by reducing the tilt of the fluorocarbon segment. The wettability data indicated that the adsorbates with longer alkyl chains were less wettable than those with shorter alkyl chains, likely due to an increase in interchain van der Waals forces in the former.
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Affiliation(s)
- Pawilai Chinwangso
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston, 4800 Calhoun Road, Houston, TX 77204-5003, USA.
| | - Lydia R St Hill
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston, 4800 Calhoun Road, Houston, TX 77204-5003, USA.
| | - Maria D Marquez
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston, 4800 Calhoun Road, Houston, TX 77204-5003, USA.
| | - T Randall Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston, 4800 Calhoun Road, Houston, TX 77204-5003, USA.
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6
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Pardo-Figuerez M, Martin NRW, Player DJ, Capel AJ, Christie SDR, Lewis MP. Neural and Aneural Regions Generated by the Use of Chemical Surface Coatings. ACS Biomater Sci Eng 2018; 4:98-106. [PMID: 33418681 DOI: 10.1021/acsbiomaterials.7b00663] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The disordered environment found in conventional neural cultures impedes various applications where cell directionality is a key process for functionality. Neurons are highly specialized cells known to be greatly dependent on interactions with their surroundings. Therefore, when chemical cues are incorporated on the surface material, a precise control over neuronal behavior can be achieved. Here, the behavior of SH-SY5Y neurons on a variety of self-assembled monolayers (SAMs) and polymer brushes both in isolation and combination to promote cellular spatial control was determined. APTES and BIBB coatings promoted the highest cell viability, proliferation, metabolic activity, and neuronal maturation, while low cell survival was seen on PKSPMA and PMETAC surfaces. These cell-attractive and repulsive surfaces were combined to generate a binary BIBB-PKSPMA coating, whereby cellular growth was restricted to an exclusive neural region. The utility of these coatings when precisely combined could act as a bioactive/bioinert surface resulting in a biomimetic environment where control over neuronal growth and directionality can be achieved.
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Affiliation(s)
- Maria Pardo-Figuerez
- National Centre for Sport and Exercise Medicine (NCSEM), School of Sport, Exercise and Health Sciences, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom.,Chemistry Department, School of Science, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom
| | - Neil R W Martin
- National Centre for Sport and Exercise Medicine (NCSEM), School of Sport, Exercise and Health Sciences, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom
| | - Darren J Player
- National Centre for Sport and Exercise Medicine (NCSEM), School of Sport, Exercise and Health Sciences, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom
| | - Andrew J Capel
- National Centre for Sport and Exercise Medicine (NCSEM), School of Sport, Exercise and Health Sciences, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom.,Chemistry Department, School of Science, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom
| | - Steve D R Christie
- Chemistry Department, School of Science, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom
| | - Mark P Lewis
- National Centre for Sport and Exercise Medicine (NCSEM), School of Sport, Exercise and Health Sciences, Loughborough University, Epinal Way, Loughborough LE11 3TU, United Kingdom
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Allan JTS, Quaranta S, Ebralidze II, Egan JG, Poisson J, Laschuk NO, Gaspari F, Easton EB, Zenkina OV. Terpyridine-Based Monolayer Electrochromic Materials. ACS Appl Mater Interfaces 2017; 9:40438-40445. [PMID: 29076345 DOI: 10.1021/acsami.7b11848] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Novel electrochromic (EC) materials were developed and formed by a two-step chemical deposition process. First, a self-assembled monolayer (SAM) of 2,2':6',2″-terpyridin-4'-ylphosphonic acid, L, was deposited on the surface of a nanostructured conductive indium-tin oxide (ITO) screen-printed support by simple submerging of the support into an aqueous solution of L. Further reaction of the SAM with Fe or Ru ions results in the formation of a monolayer of the redox-active metal complex covalently bound to the ITO support (Fe-L/ITO and Ru-L/ITO, respectively). These novel light-reflective EC materials demonstrate a high color difference, significant durability, and fast switching speed. The Fe-based material shows an excellent change of optical density and coloration efficiency. The results of thermogravimetric analysis suggest high thermal stability of the materials. Indeed, the EC characteristics do not change significantly after heating of Fe-L/ITO at 100 °C for 1 week, confirming the excellent stability and high EC reversibility. The proposed fabrication approach that utilizes interparticle porosity of the support and requires as low as a monolayer of EC active molecule benefits from the significant molecular economy when compared with traditional polymer-based EC devices and is significantly less time-consuming than layer-by-layer growth of coordination-based molecular assemblies.
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Affiliation(s)
- Jesse T S Allan
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Simone Quaranta
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Iraklii I Ebralidze
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Jacquelyn G Egan
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Jade Poisson
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Nadia O Laschuk
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Franco Gaspari
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - E Bradley Easton
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Olena V Zenkina
- Faculty of Science, University of Ontario Institute of Technology , 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
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Hushegyi A, Pihíková D, Bertok T, Adam V, Kizek R, Tkac J. Ultrasensitive detection of influenza viruses with a glycan-based impedimetric biosensor. Biosens Bioelectron 2016; 79:644-9. [PMID: 26765527 PMCID: PMC4883649 DOI: 10.1016/j.bios.2015.12.102] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 12/19/2015] [Accepted: 12/29/2015] [Indexed: 12/20/2022]
Abstract
An ultrasensitive impedimetric glycan-based biosensor for reliable and selective detection of inactivated, but intact influenza viruses H3N2 was developed. Such glycan-based approach has a distinct advantage over antibody-based detection of influenza viruses since glycans are natural viral receptors with a possibility to selectively distinguish between potentially pathogenic influenza subtypes by the glycan-based biosensors. Build-up of the biosensor was carefully optimized with atomic force microscopy applied for visualization of the biosensor surface after binding of viruses with the topology of an individual viral particle H3N2 analyzed. The glycan biosensor could detect a glycan binding lectin with a limit of detection (LOD) of 5 aM. The biosensor was finally applied for analysis of influenza viruses H3N2 with LOD of 13 viral particles in 1 μl, what is the lowest LOD for analysis of influenza viral particles by the glycan-based device achieved so far. The biosensor could detect H3N2 viruses selectively with a sensitivity ratio of 30 over influenza viruses H7N7. The impedimetric biosensor presented here is the most sensitive glycan-based device for detection of influenza viruses and among the most sensitive antibody or aptamer based biosensor devices.
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Affiliation(s)
- András Hushegyi
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 845 38 Bratislava, Slovakia
| | - Dominika Pihíková
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 845 38 Bratislava, Slovakia
| | - Tomas Bertok
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 845 38 Bratislava, Slovakia
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - René Kizek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - Jan Tkac
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 845 38 Bratislava, Slovakia.
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Park CS, Lee HJ, Jamison AC, Lee TR. Robust Thick Polymer Brushes Grafted from Gold Surfaces Using Bidentate Thiol-Based Atom-Transfer Radical Polymerization Initiators. ACS Appl Mater Interfaces 2016; 8:5586-5594. [PMID: 26841087 DOI: 10.1021/acsami.5b11305] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A new bromoisobutyrate-terminated alkanethiol, 16-(3,5-bis(mercaptomethyl)phenoxy)hexadecyl 2-bromo-2-methylpropanoate (BMTBM), was designed as a bidentate adsorbate to form thermally stable bromoisobutyrate-terminated self-assembled monolayers (SAMs) on flat gold surfaces to conduct atom-transfer radical polymerizations (ATRPs). The monolayers derived from BMTBM were characterized by ellipsometry, X-ray photoelectron spectroscopy (XPS), and polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS) and compared to the monolayers formed from 16-mercaptohexadecyl 2-bromo-2-methylpropanoate (MBM), 16-(3-(mercaptomethyl)phenoxy)hexadecyl 2-bromo-2-methyl-propanoate (MTBM), and octadecanethiol (C18SH). In this study, although the monolayer derived from BMTBM was less densely packed than those derived from MBM and MTBM, the bidentate adsorbates demonstrated much higher thermal stability in solution-phase thermal desorption tests, owing to the "chelate effect". The enhanced stability of the BMTBM SAMs ensured the development of thick brushes of poly(methyl methacrylate) and polystyrene at elevated temperatures (60, 90, 105, and 120 °C). In contrast, SAMs derived from MBM and MTBM failed to grow polymer brushes at temperatures above 100 °C.
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Affiliation(s)
- Chul Soon Park
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Han Ju Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - Andrew C Jamison
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
| | - T Randall Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , 4800 Calhoun Road, Houston, Texas 77204-5003, United States
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Abstract
The direct growth of single-layer graphene patterns via electron irradiation of aromatic self-assembled monolayers and subsequent annealing is demonstrated. In this way, a reduction in the number of necessary manufacturing steps is achieved. The formed micro- and nanostructures can be arbitrarily shaped and eventually implemented in a manifold of applications.
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Affiliation(s)
- Nils-Eike Weber
- Faculty of Physics, University of Bielefeld, 33615, Bielefeld, Germany
| | - Stefan Wundrack
- Physikalisch-Technische Bundesanstalt, 38116, Braunschweig, Germany
| | - Rainer Stosch
- Physikalisch-Technische Bundesanstalt, 38116, Braunschweig, Germany
| | - Andrey Turchanin
- Faculty of Physics, University of Bielefeld, 33615, Bielefeld, Germany
- Institute for Physical Chemistry, Friedrich Schiller University Jena, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Jena, 07743, Germany
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11
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Spampinato V, Parracino MA, La Spina R, Rossi F, Ceccone G. Surface Analysis of Gold Nanoparticles Functionalized with Thiol-Modified Glucose SAMs for Biosensor Applications. Front Chem 2016; 4:8. [PMID: 26973830 PMCID: PMC4770020 DOI: 10.3389/fchem.2016.00008] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 02/05/2016] [Indexed: 01/20/2023] Open
Abstract
In this work, Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS), Principal Component Analysis (PCA) and X-ray Photoelectron Spectroscopy (XPS) have been used to characterize the surface chemistry of gold substrates before and after functionalization with thiol-modified glucose self-assembled monolayers and subsequent biochemical specific recognition of maltose binding protein (MBP). The results indicate that the surface functionalization is achieved both on flat and nanoparticles gold substrates thus showing the potential of the developed system as biodetection platform. Moreover, the method presented here has been found to be a sound and valid approach to characterize the surface chemistry of nanoparticles functionalized with large molecules. Both techniques were proved to be very useful tools for monitoring all the functionalization steps, including the investigation of the biological behavior of the glucose-modified particles in the presence of the maltose binding protein.
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Affiliation(s)
- Valentina Spampinato
- European Commission, Joint Research Centre, Institute for Health and Consumer ProtectionIspra, Italy
- Istituto di Fisica dei Plasmi, Consiglio Nazionale delle RicercheMilano, Italy
| | - Maria Antonietta Parracino
- European Commission, Joint Research Centre, Institute for Health and Consumer ProtectionIspra, Italy
- Technical Department, Nanoimmunotech S.LZaragoza, Spain
| | - Rita La Spina
- European Commission, Joint Research Centre, Institute for Health and Consumer ProtectionIspra, Italy
| | - Francois Rossi
- European Commission, Joint Research Centre, Institute for Health and Consumer ProtectionIspra, Italy
| | - Giacomo Ceccone
- European Commission, Joint Research Centre, Institute for Health and Consumer ProtectionIspra, Italy
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12
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Yan Y, Huang LB, Zhou Y, Han ST, Zhou L, Sun Q, Zhuang J, Peng H, Yan H, Roy VAL. Surface Decoration on Polymeric Gate Dielectrics for Flexible Organic Field-Effect Transistors via Hydroxylation and Subsequent Monolayer Self-Assembly. ACS Appl Mater Interfaces 2015; 7:23464-23471. [PMID: 26439239 DOI: 10.1021/acsami.5b05363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A simple photochemical reaction based on confined photocatalytic oxidation (CPO) treatment and hydrolysis was employed to efficiently convert C-H bonds into C-OH groups on polymeric material surfaces, followed by investigation of monolayer self-assembly decoration on polymeric dielectrics via chemical bonding for the organic field-effect transistors (OFETs) applications. This method is a low temperature process and has negligible etching effect on polymeric dielectric layers. Various types of self-assembled monolayers have been tested and successfully attached onto the hydroxylated polymeric dielectric surfaces through chemical bonding, ensuring the stability of decorated functional films during the subsequent device fabrication consisting of solution processing of the polymer active layer. With the surface decoration of functional groups, both n-type and p-type polymers exhibit enhanced carrier mobilities in the unipolar OFETs. In addition, enhanced and balanced mobilities are obtained in the ambipolar OFETs with the blend of polymer semiconductors. The anchored self-assembled monolayers on the dielectric surfaces dramatically preclude the solvent effect, thus enabling an improvement of carrier mobility up to 2 orders of magnitude. Our study opens a way of targeted modifications of polymeric surfaces and related applications in organic electronics.
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Affiliation(s)
- Yan Yan
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Long-Biao Huang
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Ye Zhou
- Institute for Advanced Study, Shenzhen University , Shenzhen, Guangdong 508060, People's Republic of China
| | - Su-Ting Han
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Li Zhou
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Qijun Sun
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Jiaqing Zhuang
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Haiyan Peng
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
- Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences , Guangzhou 511458, People's Republic of China
| | - He Yan
- Department of Chemistry, Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | - V A L Roy
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
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13
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Abstract
Core(Fe)-shell(Au) nanoparticles are obtained by solid-state dewetting of thin Fe/Au bilayer films deposited on a sapphire substrate. The core-shell morphology is achieved by employing the equilibrium segregation phenomenon, where Au atoms form a homogeneous thin shell on the surfaces of an Fe nanoparticle and at its interface with the substrate, reducing the total interfacial energy of the system. The obtained nanoparticles are single crystalline (structurally perfect), thermally stable, and of high purity. Their size may be tuned by changing the initial film thickness. We demonstrate that the nanoparticles can subsequently be stripped from the substrate, and/or be modified by attaching thiol-containing organic molecules for use in various nanotechnology-related applications. The method presented herein may easily be extended to other metal combinations, especially those relevant for catalysis, thus helping to reduce precious-metal (e.g., Au, Pt, Rh) content in the catalyst.
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Affiliation(s)
- Dor Amram
- Department of Materials Science and Engineering, Technion-Israel Institute of Technology , Haifa 32000, Israel
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14
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Chang DP, Guilak F, Jay GD, Zauscher S. Interaction of lubricin with type II collagen surfaces: adsorption, friction, and normal forces. J Biomech 2013; 47:659-66. [PMID: 24406099 DOI: 10.1016/j.jbiomech.2013.11.048] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 11/24/2013] [Accepted: 11/26/2013] [Indexed: 10/25/2022]
Abstract
One of the major constituents of the synovial fluid that is thought to be responsible for chondroprotection and boundary lubrication is the glycoprotein lubricin (PRG4); however, the molecular mechanisms by which lubricin carries out its critical functions still remain largely unknown. We hypothesized that the interaction of lubricin with type II collagen, the main component of the cartilage extracellular matrix, results in enhanced tribological and wear properties. In this study, we examined: (i) the molecular details by which lubricin interacts with type II collagen and how binding is related to boundary lubrication and adhesive interactions; and (ii) whether collagen structure can affect lubricin adsorption and its chondroprotective properties. We found that lubricin adsorbs strongly onto denatured, amorphous, and fibrillar collagen surfaces. Furthermore, we found large repulsive interactions between the collagen surfaces in presence of lubricin, which increased with increasing lubricin concentration. Lubricin attenuated the large friction and also the long-range adhesion between fibrillar collagen surfaces. Interestingly, lubricin adsorbed onto and mediated the frictional response between the denatured and native amorphous collagen surfaces equally and showed no preference on the supramolecular architecture of collagen. However, the coefficient of friction was lowest on fibrillar collagen in the presence of lubricin. We speculate that an important role of lubricin in mediating interactions at the cartilage surface is to attach to the cartilage surface and provide a protective coating that maintains the contacting surfaces in a sterically repulsive state.
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Affiliation(s)
- Debby P Chang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA; Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708, USA
| | - Farshid Guilak
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA; Center for Biomolecular and Tissue Engineering, Duke University, Durham, NC 27708, USA; Department of Orthopaedic Surgery, Duke University, Durham, NC 27710, USA
| | - Gregory D Jay
- Department of Emergency Medicine, and Brown University, Providence, RI 02903, USA
| | - Stefan Zauscher
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA; Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, NC 27708, USA; Center for Biomolecular and Tissue Engineering, Duke University, Durham, NC 27708, USA.
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15
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Basabe-Desmonts L, Van der Baan F, Zimmerman RS, Reinhoudt DN, Crego-Calama M. Cross-Reactive Sensor Array for Metal Ion Sensing Based on Fluorescent SAMs. Sensors (Basel) 2007; 7:1731-1746. [PMID: 28903194 PMCID: PMC3841843 DOI: 10.3390/s7091731] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2007] [Accepted: 09/04/2007] [Indexed: 11/29/2022]
Abstract
Fluorescent self assembled monolayers (SAMs) on glass were previouslydeveloped in our group as new sensing materials for metal ions. These fluorescent SAMs arecomprised by fluorophores and small molecules sequentially deposited on a monolayer onglass. The preorganization provided by the surface avoids the need for complex receptordesign, allowing for a combinatorial approach to sensing systems based on small molecules.Now we show the fabrication of an effective microarray for the screening of metal ions andthe properties of the sensing SAMs. A collection of fluorescent sensing SAMs wasgenerated by combinatorial methods and immobilized on the glass surfaces of a custom-made 140 well microtiter-plate. The resulting libraries are easily measured and show variedresponses to a series cations such as Cu2+ , Co2+ , Pb2+ , Ca2+ and Zn2+ . These surfaces are notdesigned to complex selectively a unique analyte but rather they are intended to producefingerprint type responses to a range of analytes by less specific interactions. The unselectiveresponses of the library to the presence of different cations generate a characteristic patternfor each analyte, a "finger print" response.
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Affiliation(s)
- Lourdes Basabe-Desmonts
- Department of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Frederieke Van der Baan
- Department of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Rebecca S Zimmerman
- Department of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - David N Reinhoudt
- Department of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Mercedes Crego-Calama
- Department of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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