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Schmidheini L, Tiefenauer RF, Gatterdam V, Frutiger A, Sannomiya T, Aramesh M. Self-Assembly of Nanodiamonds and Plasmonic Nanoparticles for Nanoscopy. BIOSENSORS 2022; 12:bios12030148. [PMID: 35323419 PMCID: PMC8946096 DOI: 10.3390/bios12030148] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 06/01/2023]
Abstract
Nanodiamonds have emerged as promising agents for sensing and imaging due to their exceptional photostability and sensitivity to the local nanoscale environment. Here, we introduce a hybrid system composed of a nanodiamond containing nitrogen-vacancy center that is paired to a gold nanoparticle via DNA hybridization. Using multiphoton optical studies, we demonstrate that the harmonic mode emission generated in gold nanoparticles induces a coupled fluorescence emission in nanodiamonds. We show that the flickering of harmonic emission in gold nanoparticles directly influences the nanodiamonds' emissions, resulting in stochastic blinking. By utilizing the stochastic emission fluctuations, we present a proof-of-principle experiment to demonstrate the potential application of the hybrid system for super-resolution microscopy. The introduced system may find applications in intracellular biosensing and bioimaging due to the DNA-based coupling mechanism and also the attractive characteristics of harmonic generation, such as low power, low background and tissue transparency.
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Affiliation(s)
- Lukas Schmidheini
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, 8092 Zürich, Switzerland; (L.S.); (R.F.T.); (V.G.); (A.F.)
| | - Raphael F. Tiefenauer
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, 8092 Zürich, Switzerland; (L.S.); (R.F.T.); (V.G.); (A.F.)
| | - Volker Gatterdam
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, 8092 Zürich, Switzerland; (L.S.); (R.F.T.); (V.G.); (A.F.)
| | - Andreas Frutiger
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, 8092 Zürich, Switzerland; (L.S.); (R.F.T.); (V.G.); (A.F.)
| | - Takumi Sannomiya
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan;
| | - Morteza Aramesh
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, 8092 Zürich, Switzerland; (L.S.); (R.F.T.); (V.G.); (A.F.)
- Department of Materials Science and Engineering, Division of Biomedical Engineering, Uppsala University, 751 21 Uppsala, Sweden
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2
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Wang S, Wang J. Magnetic 2D/2D oxygen doped g-C 3N 4/biochar composite to activate peroxymonosulfate for degradation of emerging organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127207. [PMID: 34555766 DOI: 10.1016/j.jhazmat.2021.127207] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/09/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Herein, magnetic 2D/2D oxygen-doped graphite carbon nitride/ biochar (γ-Fe2O3/O-g-C3N4/BC) composite was rationally fabricated and used to activate peroxymonosulfate (PMS) for the degradation of emerging organic pollutants. O-g-C3N4 or coconut-derived biochar (BC) displayed low catalytic activity to PMS, while γ-Fe2O3/O-g-C3N4/BC composite showed superior catalytic activity, in which complete degradation of antibiotic sulfamethoxazole (SMX) was quickly achieved, with the mineralization ratio of 62.3%. The surface-bound reactive species (dominant) and sulfate radicals as well as hydroxyl radicals contributed to SMX degradation. Visible light could accelerate SMX degradation and enhance SMX mineralization, suggesting that γ-Fe2O3/O-g-C3N4/BC composite had good photocatalytic activity. The superior catalytic activity of γ-Fe2O3/O-g-C3N4/BC composite to activate PMS and visible light was attributed to the enhanced interfacial charge transfer and adsorption capacity. In addition to antibiotic SMX, other typical emerging organic pollutants, including atrazine, phenol, nitrobenzene and carbamazepine could also be degraded and mineralized in the system of visible light/O-g-C3N4/BC/PMS, indicating its wide applicability for degradation of various toxic organic pollutants in water and wastewater.
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Affiliation(s)
- Shizong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, P.R. China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, P.R. China
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, P.R. China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, P.R. China.
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3
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Zhang Y, Hudson-Smith NV, Frand SD, Cahill MS, Davis LS, Feng ZV, Haynes CL, Hamers RJ. Influence of the Spatial Distribution of Cationic Functional Groups at Nanoparticle Surfaces on Bacterial Viability and Membrane Interactions. J Am Chem Soc 2020; 142:10814-10823. [PMID: 32402194 DOI: 10.1021/jacs.0c02737] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
While positively charged nanomaterials induce cytotoxicity in many organisms, much less is known about how the spatial distribution and presentation of molecular surface charge impact nanoparticle-biological interactions. We systematically functionalized diamond nanoparticle surfaces with five different cationic surface molecules having different molecular structures and conformations, including four small ligands and one polymer, and we then probed the molecular-level interaction between these nanoparticles and bacterial cells. Shewanella oneidensis MR-1 was used as a model bacterial cell system to investigate how the molecular length and conformation of cationic surface charges influence their interactions with the Gram-negative bacterial membranes. Nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) demonstrate the covalent modification of the nanoparticle surface with the desired cationic organic monolayers. Surprisingly, bacterial growth-based viability (GBV) and membrane damage assays both show only minimal biological impact by the NPs functionalized with short cationic ligands within the concentration range tested, yet NPs covalently linked to a cationic polymer induce strong cytotoxicity, including reduced cellular viability and significant membrane damage at the same concentration of cationic groups. Transmission electron microscopy (TEM) images of these NP-exposed bacterial cells show that NPs functionalized with cationic polymers induce significant membrane distortion and the production of outer membrane vesicle-like features, while NPs bearing short cationic ligands only exhibit weak membrane association. Our results demonstrate that the spatial distribution of molecular charge plays a key role in controlling the interaction of cationic nanoparticles with bacterial cell membranes and the subsequent biological impact. Nanoparticles functionalized with ligands having different lengths and conformations can have large differences in interactions even while having nearly identical zeta potentials. While the zeta potential is a convenient and commonly used measure of nanoparticle charge, it does not capture essential differences in molecular-level nanoparticle properties that control their biological impact.
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Affiliation(s)
- Yongqian Zhang
- University of Wisconsin-Madison, Department of Chemistry, Madison, Wisconsin 53706, United States
| | - Natalie V Hudson-Smith
- University of Minnesota Twin Cities, Department of Chemistry, Minneapolis, Minnesota 55455, United States
| | - Seth D Frand
- Augsburg University, Department of Chemistry, Minneapolis, Minnesota 55454, United States
| | - Meghan S Cahill
- University of Minnesota Twin Cities, Department of Chemistry, Minneapolis, Minnesota 55455, United States
| | - Larissa S Davis
- University of Wisconsin-Madison, Department of Chemistry, Madison, Wisconsin 53706, United States
| | - Z Vivian Feng
- Augsburg University, Department of Chemistry, Minneapolis, Minnesota 55454, United States
| | - Christy L Haynes
- University of Minnesota Twin Cities, Department of Chemistry, Minneapolis, Minnesota 55455, United States
| | - Robert J Hamers
- University of Wisconsin-Madison, Department of Chemistry, Madison, Wisconsin 53706, United States
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4
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Abdelmoaty YH, Tessema TD, Norouzi N, El-Kadri OM, Turner JBM, El-Kaderi HM. Effective Approach for Increasing the Heteroatom Doping Levels of Porous Carbons for Superior CO 2 Capture and Separation Performance. ACS APPLIED MATERIALS & INTERFACES 2017; 9:35802-35810. [PMID: 28956436 DOI: 10.1021/acsami.7b09989] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Development of efficient sorbents for carbon dioxide (CO2) capture from flue gas or its removal from natural gas and landfill gas is very important for environmental protection. A new series of heteroatom-doped porous carbon was synthesized directly from pyrazole/KOH by thermolysis. The resulting pyrazole-derived carbons (PYDCs) are highly doped with nitrogen (14.9-15.5 wt %) as a result of the high nitrogen-to-carbon ratio in pyrazole (43 wt %) and also have a high oxygen content (16.4-18.4 wt %). PYDCs have a high surface area (SABET = 1266-2013 m2 g-1), high CO2 Qst (33.2-37.1 kJ mol-1), and a combination of mesoporous and microporous pores. PYDCs exhibit significantly high CO2 uptakes that reach 2.15 and 6.06 mmol g-1 at 0.15 and 1 bar, respectively, at 298 K. At 273 K, the CO2 uptake improves to 3.7 and 8.59 mmol g-1 at 0.15 and 1 bar, respectively. The reported porous carbons also show significantly high adsorption selectivity for CO2/N2 (128) and CO2/CH4 (13.4) according to ideal adsorbed solution theory calculations at 298 K. Gas breakthrough studies of CO2/N2 (10:90) at 298 K showed that PYDCs display excellent separation properties. The ability to tailor the physical properties of PYDCs as well as their chemical composition provides an effective strategy for designing efficient CO2 sorbents.
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Affiliation(s)
- Yomna H Abdelmoaty
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University , 401 West Main Street, Richmond, Virginia 23284-2006, United States
- Department of Nuclear and Radiation Engineering, Alexandria University , Alexandria 21544, Egypt
| | - Tsemre-Dingel Tessema
- Department of Chemistry, Virginia Commonwealth University , 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Nazgol Norouzi
- Department of Chemistry, Virginia Commonwealth University , 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Oussama M El-Kadri
- Department of Biology, Chemistry, and Environmental Sciences, American University of Sharjah , P.O. Box 26666, Sharjah, United Arab Emirates
| | - Joseph B McGee Turner
- Department of Chemistry, Virginia Commonwealth University , 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Hani M El-Kaderi
- Department of Chemistry, Virginia Commonwealth University , 1001 West Main Street, Richmond, Virginia 23284-2006, United States
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5
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Kursun TT, Cimen D, Caykara T. Glycopolymer brushes with specific protein recognition property. J Appl Polym Sci 2017. [DOI: 10.1002/app.45238] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Dilek Cimen
- Department of Chemistry; Faculty of Science, Gazi University; 06500 Besevler Ankara Turkey
| | - Tuncer Caykara
- Department of Chemistry; Faculty of Science, Gazi University; 06500 Besevler Ankara Turkey
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6
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Ko JS, Doan-Nguyen VVT, Kim HS, Muller GA, Serino AC, Weiss PS, Dunn BS. Na 2Ti 3O 7 Nanoplatelets and Nanosheets Derived from a Modified Exfoliation Process for Use as a High-Capacity Sodium-Ion Negative Electrode. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1416-1425. [PMID: 27996248 DOI: 10.1021/acsami.6b10790] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The increasing interest in Na-ion batteries (NIBs) can be traced to sodium abundance, its low cost compared to lithium, and its intercalation chemistry being similar to that of lithium. We report that the electrochemical properties of a promising negative electrode material, Na2Ti3O7, are improved by exfoliating its layered structure and forming 2D nanoscale morphologies, nanoplatelets, and nanosheets. Exfoliation of Na2Ti3O7 was carried out by controlling the amount of proton exchange for Na+ and then proceeding with the intercalation of larger cations such as methylammonium and propylammonium. An optimized mixture of nanoplatelets and nanosheets exhibited the best electrochemical performance in terms of high capacities in the range of 100-150 mA h g-1 at high rates with stable cycling over several hundred cycles. These properties far exceed those of the corresponding bulk material, which is characterized by slow charge-storage kinetics and poor long-term stability. The results reported in this study demonstrate that charge-storage processes directed at 2D morphologies of surfaces and few layers of sheets are an exciting direction for improving the energy and power density of electrode materials for NIBs.
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Affiliation(s)
- Jesse S Ko
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Vicky V T Doan-Nguyen
- California NanoSystems Institute, University of California, Santa Barbara , Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara , Santa Barbara, California 93106, United States
| | - Hyung-Seok Kim
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Guillaume A Muller
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Andrew C Serino
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Paul S Weiss
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Bruce S Dunn
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
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7
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Diware MS, Cho HM, Chegal W, Cho YJ, Kim DS, O SW, Kim KS, Paek SH. Ultrasensitive, label-free detection of cardiac biomarkers with optical SIS sensor. Biosens Bioelectron 2017; 87:242-248. [DOI: 10.1016/j.bios.2016.08.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/04/2016] [Accepted: 08/16/2016] [Indexed: 12/11/2022]
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8
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Ataman NC, Klok HA. Degrafting of Poly(poly(ethylene glycol) methacrylate) Brushes from Planar and Spherical Silicon Substrates. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01445] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nariye Cavusoglu Ataman
- Institut des Matériaux
et Institut des Sciences et Ingénierie Chimiques, Laboratoire
des Polyméres, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut des Matériaux
et Institut des Sciences et Ingénierie Chimiques, Laboratoire
des Polyméres, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
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9
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Khaldi K, Sam S, Gouget-Laemmel AC, Henry de Villeneuve C, Moraillon A, Ozanam F, Yang J, Kermad A, Ghellai N, Gabouze N. Active Acetylcholinesterase Immobilization on a Functionalized Silicon Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8421-8428. [PMID: 26153025 DOI: 10.1021/acs.langmuir.5b01928] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, we studied the attachment of active acetylcholinesterase (AChE) enzyme on a silicon substrate as a potential biomarker for the detection of organophosphorous (OP) pesticides. A multistep functionalization strategy was developed on a crystalline silicon surface: a carboxylic acid-terminated monolayer was grafted onto a hydrogen-terminated silicon surface by photochemical hydrosilylation, and then AChE was covalently attached through amide bonds using an activation EDC/NHS process. Each step of the modification was quantitatively characterized by ex-situ Fourier transform infrared spectroscopy in attenuated-total-reflection geometry (ATR-FTIR) and atomic force microscopy (AFM). The kinetics of enzyme immobilization was investigated using in situ real-time infrared spectroscopy. The enzymatic activity of immobilized acetylcholinesterase enzymes was determined with a colorimetric test. The surface concentration of active AChE was estimated to be Γ = 1.72 × 10(10) cm(-2).
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Affiliation(s)
- K Khaldi
- ‡Unité de Recherche Matériaux et Energies Renouvelables (URMER), Département de Physique, Faculté des Sciences, Université Abou Baker Belkaid, B.P. 119, 13000 Tlemcen, Algeria
| | | | - A C Gouget-Laemmel
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - C Henry de Villeneuve
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - A Moraillon
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - F Ozanam
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - J Yang
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - A Kermad
- ‡Unité de Recherche Matériaux et Energies Renouvelables (URMER), Département de Physique, Faculté des Sciences, Université Abou Baker Belkaid, B.P. 119, 13000 Tlemcen, Algeria
| | - N Ghellai
- ‡Unité de Recherche Matériaux et Energies Renouvelables (URMER), Département de Physique, Faculté des Sciences, Université Abou Baker Belkaid, B.P. 119, 13000 Tlemcen, Algeria
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10
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Peptides and Peptidomimetics for Antimicrobial Drug Design. Pharmaceuticals (Basel) 2015; 8:366-415. [PMID: 26184232 PMCID: PMC4588174 DOI: 10.3390/ph8030366] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 05/27/2015] [Accepted: 06/17/2015] [Indexed: 12/21/2022] Open
Abstract
The purpose of this paper is to introduce and highlight a few classes of traditional antimicrobial peptides with a focus on structure-activity relationship studies. After first dissecting the important physiochemical properties that influence the antimicrobial and toxic properties of antimicrobial peptides, the contributions of individual amino acids with respect to the peptides antibacterial properties are presented. A brief discussion of the mechanisms of action of different antimicrobials as well as the development of bacterial resistance towards antimicrobial peptides follows. Finally, current efforts on novel design strategies and peptidomimetics are introduced to illustrate the importance of antimicrobial peptide research in the development of future antibiotics.
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11
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Gallant BM, Gu XW, Chen DZ, Greer JR, Lewis NS. Tailoring of interfacial mechanical shear strength by surface chemical modification of silicon microwires embedded in Nafion membranes. ACS NANO 2015; 9:5143-5153. [PMID: 25872455 DOI: 10.1021/acsnano.5b00468] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The interfacial shear strength between Si microwires and a Nafion membrane has been tailored through surface functionalization of the Si. Acidic (-COOH-terminated) or basic (-NH2-terminated) surface-bound functionality was introduced by hydrosilylation reactions to probe the interactions between the functionalized Si microwires and hydrophilic ionically charged sites in the Nafion polymeric side chains. Surfaces functionalized with SiOx, Si-H, or Si-CH3 were also synthesized and investigated. The interfacial shear strength between the functionalized Si microwire surfaces and the Nafion matrix was quantified by uniaxial wire pull-out experiments in an in situ nanomechanical instrument that allowed simultaneous collection of mechanical data and visualization of the deformation process. In this process, an axial load was applied to the custom-shaped top portions of individual wires until debonding occurred from the Nafion matrix. The shear strength obtained from the nanomechanical measurements correlated with the chemical bond strength and the functionalization density of the molecular layer, with values ranging from 7 MPa for Si-CH3 surfaces to ∼16-20 MPa for oxygen-containing surface functionalities. Hence surface chemical control can be used to influence the mechanical adhesion forces at a Si-Nafion interface.
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Affiliation(s)
- Betar M Gallant
- †Division of Chemistry and Chemical Engineering, ‡Division of Engineering and Applied Sciences, §The Kavli Nanoscience Institute at Caltech, and ∥The Beckman Institute at Caltech, California Institute of Technology, Pasadena, California 91125, United States
| | - X Wendy Gu
- †Division of Chemistry and Chemical Engineering, ‡Division of Engineering and Applied Sciences, §The Kavli Nanoscience Institute at Caltech, and ∥The Beckman Institute at Caltech, California Institute of Technology, Pasadena, California 91125, United States
| | - David Z Chen
- †Division of Chemistry and Chemical Engineering, ‡Division of Engineering and Applied Sciences, §The Kavli Nanoscience Institute at Caltech, and ∥The Beckman Institute at Caltech, California Institute of Technology, Pasadena, California 91125, United States
| | - Julia R Greer
- †Division of Chemistry and Chemical Engineering, ‡Division of Engineering and Applied Sciences, §The Kavli Nanoscience Institute at Caltech, and ∥The Beckman Institute at Caltech, California Institute of Technology, Pasadena, California 91125, United States
| | - Nathan S Lewis
- †Division of Chemistry and Chemical Engineering, ‡Division of Engineering and Applied Sciences, §The Kavli Nanoscience Institute at Caltech, and ∥The Beckman Institute at Caltech, California Institute of Technology, Pasadena, California 91125, United States
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12
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King JR, Bowers CM, Toone EJ. Specific binding at the cellulose binding module-cellulose interface observed by force spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:3431-40. [PMID: 25738531 DOI: 10.1021/la504836u] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The need for effective enzymatic depolymerization of cellulose has stimulated an interest in interactions between protein and cellulose. Techniques utilized for quantitative measurements of protein-cellulose noncovalent association include microgravimetry, calorimetry, and atomic force microscopy (AFM), none of which differentiate between specific protein-cellulose binding and nonspecific adhesion. Here, we describe an AFM approach that differentiates nonspecific from specific interactions between cellulose-binding modules (CBMs) and cellulose. We demonstrate that the "mismatched" interaction between murine galectin-3, a lectin with no known affinity for cellulose, and cellulose shows molecular recognition force microscopy profiles similar to those observed during the interaction of a "matched" clostridial CBM3a with the same substrate. We also examine differences in binding probabilities and rupture profiles during CBM-cellulose binding experiments in the presence and absence of a blocking agent-a substrate specific for CBM that presumably blocks binding sites. By comparison of the behavior of the two proteins, we separate specific (i.e., blockable) and nonspecific adhesion events and show that both classes of interaction exhibit nearly identical rupture forces (45 pN at ∼0.4 nN/s). Our work provides an important caveat for the interpretation of protein-carbohydrate binding by force spectroscopy; delineation of the importance of such interactions to other classes of binding warrants further study.
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Affiliation(s)
- Jason R King
- †Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Carleen M Bowers
- †Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Eric J Toone
- †Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
- ‡Department of Biochemistry, Duke University Medical School, Durham, North Carolina 27710, United States
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13
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Lee HJ, Jamison AC, Lee TR. Boc-protected ω-amino alkanedithiols provide chemically and thermally stable amine-terminated monolayers on gold. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:2136-2146. [PMID: 25631104 DOI: 10.1021/la5044359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Four custom-designed bidentate adsorbates having either ammonium or Boc-protected amino termini and either methanethiol or ethanethioate headgroups were prepared for the purpose of generating amine-terminated self-assembled monolayers (SAMs) on evaporated gold surfaces. These adsorbates utilize a phenyl-based framework to connect the headgroups to a single hexadecyloxy chain, extending the amino functionality away from the surface of gold, providing two regions within the adsorbate structure where intermolecular interactions contribute to the stability of the fully formed thin film. The structural features of the resulting SAMs were characterized by ellipsometry, X-ray photoelectron spectroscopy, and polarization modulation infrared reflection-absorption spectroscopy. The collected data were compared to those of eight additional SAMs formed from analogous monodentate alkanethiols and alkanethioacetates having either a similar aromatic framework or a simple alkyl chain connecting the headgroup to the tailgroup. The analysis of the data obtained for the full set of SAMs revealed that both the tailgroup and headgroup influenced the formation of a well-packed monolayer, with the Boc-protected amine-terminated alkanethiols producing films with superior surface bonding and adsorbate packing as compared to those formed with ammonium tailgroups or alkanethioacetate headgroups. A comparison of the structural differences before and after deprotection of the Boc-protected amine-terminated thiolate SAMs revealed that the bidentate adsorbate was the most resistant to desorption during the Boc-deprotection procedure. Furthermore, solution-phase thermal desorption tests performed to evaluate the thermal stability of the Boc-deprotected amine-terminated alkanethiolate films provided further evidence of the enhanced stability associated with SAMs formed from these bidentate adsorbates.
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Affiliation(s)
- Han Ju 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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14
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Cheng H, Wu JX, Zheng H, Xu W, Zhou L, Too HP, Choi WK. DNA hybridization on silicon nanowire platform prepared by glancing angle deposition and metal assisted chemical etching process. RSC Adv 2015. [DOI: 10.1039/c5ra07117h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Porous nanowire surface provides high capacity for oligonucleotide hybridization.
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Affiliation(s)
- H. Cheng
- Advanced Materials for Micro- and Nano-Systems
- Singapore-MIT Alliance
- Singapore
| | - J. X. Wu
- NUS Graduate School for Integrative Sciences and Engineering
- National University of Singapore
- Singapore
| | - H. Zheng
- GLOBALFOUNDRIES Singapore Pte. Ltd
- Singapore
| | - W. Xu
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore
| | | | - H. P. Too
- Department of Biochemistry
- National University of Singapore
- Singapore
- Bioprocessing Technology Institute
- Singapore
| | - W. K. Choi
- Advanced Materials for Micro- and Nano-Systems
- Singapore-MIT Alliance
- Singapore
- NUS Graduate School for Integrative Sciences and Engineering
- National University of Singapore
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15
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Fabregat G, Teixeira-Dias B, del Valle LJ, Armelin E, Estrany F, Alemán C. Incorporation of a clot-binding peptide into polythiophene: properties of composites for biomedical applications. ACS APPLIED MATERIALS & INTERFACES 2014; 6:11940-11954. [PMID: 25069384 DOI: 10.1021/am503904h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Biocomposites formed by a pentapeptide (CREKA), which recognizes clotted plasma proteins, entrapped into the poly(3,4-ethylenedioxythiophene) (PEDOT) matrix have been prepared using three very different procedures. X-ray photoelectron spectroscopy analyses indicate that PEDOT-CREKA films, prepared by chronoamperometry in basic aqueous solution (pH = 10.3) and deposited onto a PEDOT internal layer, present the higher concentration of peptide: one CREKA molecule per six polymer repeat units. The surface of this bilayered system shows numerous folds homogeneously distributed, which have been exhaustively characterized by scanning electron microscopy and atomic force microscopy. Indeed, the morphology and topography of such bilayered films is completely different from those of biocomposite-prepared acid aqueous and organic solutions as polymerization media. The impact of the entrapped peptide molecules in the electrochemical properties of the conducting polymer has been found to be practically negligible. In contrast, biocompatibility assays with two different cellular lines indicate that PEDOT-CREKA favors cellular proliferation, which has been attributed to the binding of the peptide to the fibrin molecules from the serum used as a supplement in the culture medium. The latter assumption has been corroborated examining the ability of PEDOT-CREKA to bind fibrin. The latter ability has been also used to explore an alternative strategy based on the treatment of PEDOT-CREKA with fibrin to promote cell attachment and growth. Overall, the results suggest that PEDOT-CREKA is appropriated for multiple biomedical applications combining the electrochemical properties of conducting polymer and the ability of the peptide to recognize and bind proteins.
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Affiliation(s)
- Georgina Fabregat
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya , Avda. Diagonal 647, Barcelona E-08028, Spain
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16
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Ab initio investigation of the passivation effect of the acrylonitrile molecule on the Si(100)-(2×1) surface. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Miller T, Teplyakov AV. Attachment chemistry of PCBM to a primary-amine-terminated organic monolayer on a Si(111) surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5105-5114. [PMID: 24735094 DOI: 10.1021/la404798k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Interfacing multifunctional molecules with semiconductor surfaces has a variety of applications; however, it is important to understand the selectivity of target surface reactions to produce the surface with desired functionality. In this work, a silicon surface modified with 1-amino-10-undecene was reacted with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) in toluene. Two possible competing reactions for PCBM, via the ester group and by direct attachment to the C60 portion, are analyzed. X-ray photoelectron spectroscopy, atomic force microscopy, Fourier-transform infrared spectroscopy, and time-of-flight secondary ion mass spectroscopy, supplemented by density functional theory calculations, suggest that despite the similarity of the energetics for those two reaction pathways, predominant chemisorption occurs via the direct attachment of the C60 cage to the primary amino group of the functionalized silicon surface.
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Affiliation(s)
- Timothy Miller
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
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18
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Recent Advances in DNA Microarray Technology: an Overview on Production Strategies and Detection Methods. BIONANOSCIENCE 2013. [DOI: 10.1007/s12668-013-0111-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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19
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Collins G, O'Dwyer C, Morris M, Holmes JD. Palladium-catalyzed coupling reactions for the functionalization of Si surfaces: superior stability of alkenyl monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11950-11958. [PMID: 23968278 DOI: 10.1021/la402480f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Palladium-catalyzed Suzuki, Heck, and Sonogashira coupling reactions were studied as reaction protocols for organic modification of Si surfaces. These synthetically useful protocols allow for surface modification of alkene, alkyne, and halide terminated surfaces. Surface oxidation and metal contamination were assessed by X-ray photoelectron spectroscopy. The nature of the primary passivation layer was an important factor in the oxidation resistance of the Si surface during the secondary functionalization. Specifically, the use of alkynes as the primary functionalization layer gave superior stability compared to alkene analogues. The ability to utilize Pd-catalyzed coupling chemistries on Si surfaces opens great versatility for potential molecular and nanoscale electronics and sensing/biosensing applications.
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Affiliation(s)
- Gillian Collins
- Department of Chemistry and the Tyndall National Institute, University College Cork , Cork, Ireland
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20
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Chen C, Li P, Wang G, Yu Y, Duan F, Chen C, Song W, Qin Y, Knez M. Nanoporous Nitrogen-Doped Titanium Dioxide with Excellent Photocatalytic Activity under Visible Light Irradiation Produced by Molecular Layer Deposition. Angew Chem Int Ed Engl 2013; 52:9196-200. [DOI: 10.1002/anie.201302329] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 06/23/2013] [Indexed: 11/11/2022]
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21
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Chen C, Li P, Wang G, Yu Y, Duan F, Chen C, Song W, Qin Y, Knez M. Nanoporous Nitrogen‐Doped Titanium Dioxide with Excellent Photocatalytic Activity under Visible Light Irradiation Produced by Molecular Layer Deposition. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302329] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chaoqiu Chen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (P.R. China)
| | - Ping Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China)
| | - Guizhen Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (P.R. China)
| | - Yu Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China)
| | - Feifei Duan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (P.R. China)
| | - Caiying Chen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (P.R. China)
| | - Weiguo Song
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China)
| | - Yong Qin
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 (P.R. China)
| | - Mato Knez
- CIC nanoGUNE Consolider, Tolosa Hiribidea 76, 20018 Donostia‐San Sebastian (Spain) and IKERBASQUE, Basque Foundation for Science, Alameda Urquijo 36‐5, 48011 Bilbao (Spain)
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22
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Demirci S, Kinali-Demirci S, Caykara T. Stimuli-responsive diblock copolymer brushes via combination of “click chemistry” and living radical polymerization. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26657] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Serkan Demirci
- Department of Chemistry; Faculty of Arts and Sciences; Amasya University; Amasya 05100 Turkey
| | - Selin Kinali-Demirci
- Department of Chemistry; Faculty of Science; Gazi University; Ankara 06500 Turkey
| | - Tuncer Caykara
- Department of Chemistry; Faculty of Science; Gazi University; Ankara 06500 Turkey
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23
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Milton JA, Patole S, Yin H, Xiao Q, Brown T, Melvin T. Efficient self-assembly of DNA-functionalized fluorophores and gold nanoparticles with DNA functionalized silicon surfaces: the effect of oligomer spacers. Nucleic Acids Res 2013; 41:e80. [PMID: 23361467 PMCID: PMC3627567 DOI: 10.1093/nar/gkt031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Although strategies for the immobilization of DNA oligonucleotides onto surfaces for bioanalytical and top-down bio-inspired nanobiofabrication approaches are well developed, the effect of introducing spacer molecules between the surface and the DNA oligonucleotide for the hybridization of nanoparticle–DNA conjugates has not been previously assessed in a quantitative manner. The hybridization efficiency of DNA oligonucleotides end-labelled with gold nanoparticles (1.4 or 10 nm diameter) with DNA sequences conjugated to silicon surfaces via hexaethylene glycol phosphate diester oligomer spacers (0, 1, 2, 6 oligomers) was found to be independent of spacer length. To quantify both the density of DNA strands attached to the surfaces and hybridization with the surface-attached DNA, new methodologies have been developed. Firstly, a simple approach based on fluorescence has been developed for determination of the immobilization density of DNA oligonucleotides. Secondly, an approach using mass spectrometry has been created to establish (i) the mean number of DNA oligonucleotides attached to the gold nanoparticles and (ii) the hybridization density of nanoparticle–oligonucleotide conjugates with the silicon surface–attached complementary sequence. These methods and results will be useful for application with nanosensors, the self-assembly of nanoelectronic devices and the attachment of nanoparticles to biomolecules for single-molecule biophysical studies.
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Affiliation(s)
- James A Milton
- National Oceanography Centre, University of Southampton, Southampton, Hampshire, SO14 3ZH, UK
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24
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Demirci S, Kinali-Demirci S, Caykara T. Novel pH-responsive mixed-charge copolymer brushes based on carboxylic acid and quaternary amine monomers. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26532] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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25
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Fabregat G, Ballano G, Armelin E, del Valle LJ, Cativiela C, Alemán C. An electroactive and biologically responsive hybrid conjugate based on chemical similarity. Polym Chem 2013. [DOI: 10.1039/c2py20894f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Liu Y, Chen J, Teplyakov AV. Chemical passivation processes for biofunctionalization schemes on semiconductor surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:15521-15528. [PMID: 23025426 DOI: 10.1021/la302819j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In developing novel designs for semiconductor-based biosensors and for biofunctionalization of semiconductors in general, it is extremely important to be able to block the reaction sites present on a surface following the biomodification from further chemical transformations. This procedure is required both to protect the surface from oxidation and to allow for molecular-level control of the biomolecular interactions at the topmost layer. In this work, the biosensor model system is designed based on a single-strand biotin-modified thiol-DNA attached to the silicon substrate. The binding of this thiol-DNA to the surface is performed through the cross-linker sulfosuccinimidyl-4-(N-maleimidomethyl)-cyclohexane-1-carboxylate (SSMCC) attached to the 11-amino-1-undecene monolayer on Si(111) surface. Streptavidin-coated gold nanoparticles are used to test the reactivity of the surface and to examine the role of passivation in the entire scheme. The passivation of the remaining surface reactive sites is achieved via a reaction with 1-octadecanethiol (ODT). This approach tests both the stability of the silicon/organic layer interface and the passivation of the biofunctionalized surface on top of the organic layer. Microscopy and spectroscopy studies are combined to interrogate this model system before and after surface passivation.
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Affiliation(s)
- Yue Liu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, 19716, United States
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27
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Dendane N, Melnyk O, Xu T, Grandidier B, Boukherroub R, Stiévenard D, Coffinier Y. Direct characterization of native chemical ligation of peptides on silicon nanowires. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13336-13344. [PMID: 22931112 DOI: 10.1021/la3030217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We describe the site-specific and chemoselective immobilization of peptides on hydrogen-terminated silicon nanowires (SiNWs) using native chemical ligation (NCL) (i.e., the reaction of a thioester group with a cysteine moiety to give a stable amide bond). The SiNWs investigated in this work were grown via a vapor-liquid-solid mechanism and functionalized with a thioester moiety. The immobilization of the peptides on the SiNWs was demonstrated by synthesizing peptides with an N-terminal cysteine residue and labeled with tetramethylrhodamine or trifluoromethyl groups that were detected by fluorescence and X-ray photoelectron spectroscopy, respectively. The peptides labeled with tetramethylrhodamine or trifluoromethyl groups for fluorescence or X-ray photoelectron spectroscopy (XPS) detection studies were synthesized with an N-terminal cysteine residue. N-Terminal seryl peptides and carboxy-terminated SiNWs were used as controls to demonstrate the chemoselectivity of the peptide immobilization.
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Affiliation(s)
- Nabil Dendane
- IBL, UMR CNRS 8161, 1 rue du professeur Calmette, Lille, France
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28
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Demirci S, Caykara T. Controlled grafting of cationic poly[(ar-vinylbenzyl)trimethylammonium chloride] on hydrogen-terminated silicon substrate by surface-initiated RAFT polymerization. REACT FUNCT POLYM 2012. [DOI: 10.1016/j.reactfunctpolym.2012.06.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Cho E, Brown A, Kuech TF. Chemical characterization of DNA-immobilized InAs surfaces using X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:11890-11898. [PMID: 22809291 DOI: 10.1021/la302313v] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Single-stranded DNA immobilized on an III-V semiconductor is a potential high-sensitivity biosensor. The chemical and electronic changes occurring upon the binding of DNA to the InAs surface are essential to understanding the DNA-immobilization mechanism. In this work, the chemical properties of DNA-immobilized InAs surfaces were determined through high-resolution X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS). Prior to DNA functionalization, HF- and NH(4)OH- based aqueous etches were used to remove the native oxide from the InAs surface. The initial chemical state of the surface resulting from these etches were characterized prior to functionalization. F-tagged thiolated single-stranded DNA (ssDNA) was used as the probe species under two different functionalization methods. The presence of DNA immobilized on the surface was confirmed from the F 1s, N 1s, and P 2p peaks in the XPS spectra. The presence of salt had a profound effect on the density of immobilized DNA on the InAs surface. To study the interfacial chemistry, the surface was treated with thiolated ssDNA with and without the mercaptohexanol molecule. An analysis of the As 3d and In 3d spectra indicates that both In-S and As-S are present on the surface after DNA functionalization. The amount of In-S and As-S was determined by the functionalization method as well as the presence of mercaptohexanol during functionalization. The orientation of the adsorbed ssDNA is determined by polarization-dependent NEXAFS utilizing the N K-edge. The immobilized ssDNA molecule has a preferred tilt angle with respect to the substrate normal, but with a random azimuthal distribution.
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Affiliation(s)
- EunKyung Cho
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, USA
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30
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Bowers CM, Carlson DA, Shestopalov AA, Clark RL, Toone EJ. A general and efficient cantilever functionalization technique for AFM molecular recognition studies. Biopolymers 2012; 97:761-5. [DOI: 10.1002/bip.22061] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Tsougeni K, Koukouvinos G, Petrou PS, Tserepi A, Kakabakos SE, Gogolides E. High-capacity and high-intensity DNA microarray spots using oxygen-plasma nanotextured polystyrene slides. Anal Bioanal Chem 2012; 403:2757-64. [DOI: 10.1007/s00216-012-6058-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 04/11/2012] [Accepted: 04/16/2012] [Indexed: 10/28/2022]
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32
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Wang C, Jia XM, Jiang C, Zhuang GN, Yan Q, Xiao SJ. DNA microarray fabricated on poly(acrylic acid) brushes-coated porous silicon by in situ rolling circle amplification. Analyst 2012; 137:4539-45. [DOI: 10.1039/c2an35417a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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33
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Dugas V, Chevalier Y. Chemical reactions in dense monolayers: in situ thermal cleavage of grafted esters for preparation of solid surfaces functionalized with carboxylic acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14188-14200. [PMID: 22026445 DOI: 10.1021/la2029438] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The thermodynamics of a chemical reaction confined at a solid surface was investigated through kinetic measurements of a model unimolecular reaction. The thermal cleavage of ester groups grafted at the surface of solid silica was investigated together with complementary physicochemical characterization of the grafted species. The ester molecules were chemically grafted to the silica surface and subsequently cleaved into the carboxylic acids. A grafting process of a reproducible monolayer was designed using the reaction of monofunctional organosilane from its gas phase. The thermal deprotection step of the ester end-group was investigated. The thermal deprotection reaction behaves in quite a specific manner when it is conducted at a surface in a grafted layer. Different organosilane molecules terminated by methyl, isopropyl and tert-butyl ester groups were grafted to silica surface; such functionalized materials were characterized by elemental analysis, IR and NMR spectroscopy, and thermogravimetric analysis, and the thermodynamic parameters of the thermal elimination reaction at the surface were measured. The limiting factor of such thermal ester cleavage reaction is the thermal stability of grafted ester group according to the temperature order: tert-butyl < i-propyl < methyl. Methyl ester groups were not selectively cleaved by temperature. The thermal deprotection of i-propyl ester groups took place at a temperature close to the thermal degradation of the organofunctional tail of the silane. The low thermolysis temperature of the grafted tert-butyl esters allowed their selective cleavage. There is a definite influence of the surface on the reaction. The enthalpy of activation is lower than in the gas phase because of the polarity of the reaction site. The major contribution is entropic; the negative entropy of activation comes from lateral interactions with the neighbor grafted molecules because of the high grafting density. Such reaction is an original strategy to functionalize the silica surface by carboxylic acid groups by means of a simple, reproducible, and efficient process involving in situ thermolysis of ester groups.
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Affiliation(s)
- Vincent Dugas
- Laboratoire des Sciences Analytiques, University of Lyon LSA, UMR CNRS 5180, Université Lyon 1, 43 bd 11 Novembre, 69622 Villeurbanne, France.
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34
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Li Y, Cai C. Click chemistry-based functionalization on non-oxidized silicon substrates. Chem Asian J 2011; 6:2592-605. [PMID: 21751406 DOI: 10.1002/asia.201100294] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Indexed: 11/07/2022]
Abstract
Copper-catalyzed azide-alkyne cycloaddition (CuAAC), combined with the chemical stability of the Si-C-bound organic layer, serves as an efficient tool for the modification of silicon substrates, particularly for the immobilization of complex biomolecules. This review covers recent advances in the preparation of alkynyl- or azido-terminated "clickable" platforms on non-oxidized silicon and their further derivatization by means of the CuAAC reaction. The exploitation of these "click"-functionalized organic thin films as model surfaces to study many biological events was also addressed, as they are directly relevant to the on-going effort of creating silicon-based molecular electronics and chemical/biomolecular sensors.
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Affiliation(s)
- Yan Li
- Department of Chemistry & Center for Materials Chemistry, University of Houston, Houston, Texas 77204, USA
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35
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Faba MA, Parent JS, Whitney RA. CO2
-derived latent nitrogen nucleophiles for controlled cross-linking of brominated poly(isobutylene-co
-isoprene). POLYM ENG SCI 2011. [DOI: 10.1002/pen.21941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Puniredd SR, Assad O, Stelzner T, Christiansen S, Haick H. Catalyst-free functionalization for versatile modification of nonoxidized silicon structures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4764-4771. [PMID: 21425837 DOI: 10.1021/la2002546] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Here, we report on a simple, catalyst-free route for obtaining highly versatile subsequent functionalization on Si nanowires and Si(111) substrates. The versatility of this approach allows subsequent functionalization not only for organic species but also for inorganic (nanomaterial) species. The method has the advantage of controlling the density of reactive cross-linkers without affecting the stability of the Si samples and without having metallic (or catalyst) residues on the surface. This method also allows formation of monolayers with a variety of termination groups and is expected to open up a wide range of opportunities for producing stable molecule-based (opto)electronic and (bio)sensing devices. Immobilization of inorganic nanomaterial on the Si samples offers advanced opportunities in molecular switches, (bio)sensors, molecular scale memory, and Si-based nanoelectronic devices.
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Affiliation(s)
- Sreenivasa Reddy Puniredd
- The Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel
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37
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Zhong YL, Bernasek SL. Direct photochemical functionalization of Si(111) with undecenol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:1796-1802. [PMID: 21268613 DOI: 10.1021/la104143r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Direct UV photochemical functionalization of H-terminated Si(111) with bifunctional 10-undecen-1-ol was achieved with selective attachment via its vinyl end, resulting in the formation of a compact monolayer with free terminal alcohol groups. This is due to the faster radical propagation mechanism in hydrosilylation with alkene compared to the nucleophilic attack mechanism of alcohol, which is impeded by intermolecular hydrogen bonding present at room temperature. Evidence from X-ray photoelectron spectroscopy, infrared spectroscopy, and resistance to fluoride etching shows that Si-C is the interfacial bond, and atomic force microscopy shows the presence of a smooth, uniform monolayer conforming to the atomic terraces of the Si(111) surface. The application of such a hydroxyl-terminated monolayer was demonstrated by tethering a bromoinitiator through surface esterification and thereafter subjecting the surface to the surface-initiated atom-transfer radical polymerization of butyl methacrylate. The poly(butyl methacrylate) brushes formed were found to be smooth (R(a) < 0.3 nm) and uniform even for a thin film of 4.0 nm.
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Affiliation(s)
- Yu Lin Zhong
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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38
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Moores B, Simons J, Xu S, Leonenko Z. AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential. NANOSCALE RESEARCH LETTERS 2011; 6:185. [PMID: 21711703 PMCID: PMC3211238 DOI: 10.1186/1556-276x-6-185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 03/01/2011] [Indexed: 05/31/2023]
Abstract
Thiol self-assembled monolayers (SAMs) are widely used in many nano- and bio-technology applications. We report a new approach to create and characterize a thiol SAMs micropattern with alternating charges on a flat gold-coated substrate using atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). We produced SAMs-patterns made of alternating positively charged, negatively charged, and hydrophobic-terminated thiols by an automated AFM-assisted manipulation, or nanografting. We show that these thiol patterns possess only small topographical differences as revealed by AFM, and distinguished differences in surface potential (20-50 mV), revealed by KPFM. The pattern can be helpful in the development of biosensor technologies, specifically for selective binding of biomolecules based on charge and hydrophobicity, and serve as a model for creating surfaces with quantified alternating surface potential distribution.
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Affiliation(s)
- Bradley Moores
- Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Janet Simons
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Song Xu
- Agilent Technologies, 4330 W. Chandler Blvd. Chandler, AZ 85226, USA
| | - Zoya Leonenko
- Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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39
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Ciampi S, James M, Darwish N, Luais E, Guan B, Harper JB, Gooding JJ. Oxidative acetylenic coupling reactions as a surface chemistry tool. Phys Chem Chem Phys 2011; 13:15624-32. [DOI: 10.1039/c1cp21450k] [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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40
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Singh V, Zharnikov M, Gulino A, Gupta T. DNA immobilization, delivery and cleavage on solid supports. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04359a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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41
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Santos H, Salonen J, Bimbo L, Lehto VP, Peltonen L, Hirvonen J. Mesoporous materials as controlled drug delivery formulations. J Drug Deliv Sci Technol 2011. [DOI: 10.1016/s1773-2247(11)50016-4] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Houlton A, Connolly BA, Pike AR, Horrocks BR. DNA-modified single crystal and nanoporous silicon. Methods Mol Biol 2011; 749:199-207. [PMID: 21674374 DOI: 10.1007/978-1-61779-142-0_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The functionalization of silicon as elemental crystalline wafer, nanoporous layers, or nanocrystalline particles with DNA oligonucleotides using automated solid phase synthesis is described. The procedures provide semiconductor surfaces covalently modified with oligomers suitable for capturing complementary oligonucleotide strands.
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Affiliation(s)
- Andrew Houlton
- Chemical Nanoscience Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, UK.
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Collins G, Holmes JD. Chemical functionalisation of silicon and germanium nanowires. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11028d] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Riccardi CS, Hess DW, Mizaikoff B. Surface-modified ZnSe waveguides for label-free infrared attenuated total reflection detection of DNA hybridization. Analyst 2011; 136:4906-11. [DOI: 10.1039/c0an00504e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gooding JJ, Ciampi S. The molecular level modification of surfaces: from self-assembled monolayers to complex molecular assemblies. Chem Soc Rev 2011; 40:2704-18. [DOI: 10.1039/c0cs00139b] [Citation(s) in RCA: 390] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Ham HO, Liu Z, Lau KHA, Lee H, Messersmith PB. Facile DNA immobilization on surfaces through a catecholamine polymer. Angew Chem Int Ed Engl 2010; 50:732-6. [PMID: 21226165 DOI: 10.1002/anie.201005001] [Citation(s) in RCA: 167] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Revised: 10/05/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Hyun Ok Ham
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60208, USA
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47
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Ham HO, Liu Z, Lau KHA, Lee H, Messersmith PB. Facile DNA Immobilization on Surfaces through a Catecholamine Polymer. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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48
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Touahir L, Allongue P, Aureau D, Boukherroub R, Chazalviel JN, Galopin E, Gouget-Laemmel A, de Villeneuve CH, Moraillon A, Niedziółka-Jönsson J, Ozanam F, Andresa JS, Sam S, Solomon I, Szunerits S. Molecular monolayers on silicon as substrates for biosensors. Bioelectrochemistry 2010; 80:17-25. [DOI: 10.1016/j.bioelechem.2010.03.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 03/12/2010] [Accepted: 03/18/2010] [Indexed: 10/19/2022]
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Wang X, Landis EC, Franking R, Hamers RJ. Surface chemistry for stable and smart molecular and biomolecular interfaces via photochemical grafting of alkenes. Acc Chem Res 2010; 43:1205-15. [PMID: 20853906 DOI: 10.1021/ar100011f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Many emerging fields such as biotechnology and renewable energy require functionalized surfaces that are "smart" and highly stable. Surface modification schemes developed previously have often been limited to simple molecules or have been based on weakly bound layers that have limited stability. In this Account, we report on recent developments enabling the preparation of molecular and biomolecular interfaces that exhibit high selectivity and unprecedented stability on a range of covalent materials including diamond, vertically aligned carbon nanofibers, silicon, and metal oxides. One particularly successful pathway to ultrastable interfaces involves the photochemical grafting of organic alkenes to the surfaces. Bifunctional alkenes with a suitable functional group at the distal end can directly impart functionality and can serve as attachment points for linking complex structures such as DNA and proteins. The successful application of photochemical grafting to a surprisingly wide range of materials has motivated researchers to better understand the underlying photochemical reaction mechanisms. The resulting studies using experimental and computational methods have provided fundamental insights into the electronic structure of the molecules and the surface control photochemical reactivity. Such investigations have revealed the important role of a previously unrecognized process, photoelectron emission, in initiating photochemical grafting of alkenes to surfaces. Molecular and biomolecular interfaces formed on diamond and other covalent materials are leading to novel types of molecular electronic interfaces. For example, electrical, optical, or electromechanical structures that convert biological information directly into analytical signals allow for direct label-free detection of DNA and proteins. Because of the preferential adherence of molecules to graphitic edge-plane sites, the grafting of redox-active species to vertically aligned carbon nanofibers leads to good electrochemical activity. Therefore researchers could graft electrocatalytic materials to carbon nanofibers to develop new types of selective electrocatalytic interfaces. Extending this chemistry to include metal oxides such as TiO(2) may lead to highly specific and efficient chemical reactions and new materials with useful applications in photovoltaic and photocatalytic energy conversion.
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Affiliation(s)
- Xiaoyu Wang
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Elizabeth C. Landis
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Ryan Franking
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Robert J. Hamers
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706
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Häbich A, Qiao GG, Ducker W. Enantioselective adsorption of surfactants monitored by ATR-FTIR. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:13944-13953. [PMID: 20690589 DOI: 10.1021/la101641r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The selectivity of adsorption of chiral surfactants to a chiral monolayer at the solid-liquid interface was studied using attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). One enantiomer of the chiral surfactant was deuterated, which causes a change in the IR absorption frequency, and allows independent measurement of the adsorption of each molecule. Both the surfactant, N-lauroyl phenylalanine (NLP), and the chiral monolayer, N-L-phenylalaninoyl, 11-undecyl-silicon, were amino acid derivatives. An enantiomeric excess of 56 +/- 22% of the L over D was observed for adsorption to the interface between a carbon tetrachloride solution containing a quasi-racemate of N-lauroyl phenylalanine and the N-L-phenylalaninoyl, 11-undecyl monolayer film on silicon. In contrast, equimolar adsorption occurred from an equimolar mixture of hydrogenated and deuterated forms of the L surfactant. The measured enantiomeric excess strongly depended on the density of chiral surface groups: the higher the density of chiral groups on the surface, the better the enantiodiscrimination, even though the total adsorption was roughly constant. This nonlinear behavior indicates that more than one chiral surface group is required for significant selectivity.
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Affiliation(s)
- Annette Häbich
- Department of Chemical and Biomolecular Engineering, University of Melbourne, Victoria 3010, Australia
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