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Rozyyev V, Gao F, Liu Y, Shevate R, Pathak R, Mane AU, Darling SB, Elam JW. Thiol-Functionalized Adsorbents through Atomic Layer Deposition and Vapor-Phase Silanization for Heavy Metal Ion Removal. ACS APPLIED MATERIALS & INTERFACES 2024; 16:34030-34041. [PMID: 38913653 DOI: 10.1021/acsami.4c03935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
The removal of toxic heavy metal ions from water resources is crucial for environmental protection and public health. In this study, we address this challenge by developing a surface functionalization technique for the selective adsorption of these contaminants. Our approach involves atomic layer deposition (ALD) followed by vapor-phase silanization of porous substrates. We utilized porous silica gel powder (∼100 μm particles, 89 m2/g surface area, ∼30 nm pores) as an initial substrate. This powder was first coated with ∼0.5 nm ALD Al2O3, followed by vapor-phase grafting of a thiol-functional silane. The modified powder, particularly in acidic conditions (pH = 4), showed high selectivity in adsorbing Cd(II), As(V), Pb(II), Hg(II), and Cu(II) heavy metal ions in mixed ion solutions over common benign ions (e.g., Na, K, Ca, and Mg). Langmuir adsorption isotherms and breakthrough adsorption studies were conducted to assess heavy metal binding affinity and revealed the order of Cd(II) < Pb(II) < Cu(II) < As(V) < Hg(II), with a significantly higher affinity for As(V) and Hg(II) ions. Time-dependent uptake studies demonstrated rapid removal of heavy metal ions from aqueous environments, with Hg(II) exhibiting the fastest adsorption kinetics on thiol-modified surfaces. These findings highlight the potential of ALD and vapor-phase silanization to create effective adsorbents for the targeted removal of hazardous contaminants from water.
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Affiliation(s)
- Vepa Rozyyev
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Feng Gao
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Yining Liu
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Rahul Shevate
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Rajesh Pathak
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Anil U Mane
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Seth B Darling
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jeffrey W Elam
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
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2
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Duleba D, Denuga S, Johnson RP. Reproducibility and stability of silane layers in nanoconfined electrochemical systems. Phys Chem Chem Phys 2024; 26:15452-15460. [PMID: 38747528 DOI: 10.1039/d4cp01181c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Organosilanes are commonly utilized to attach bioreceptors to oxide surfaces. The deposition of such silane layers is especially challenging in nanoscale or nanoconfined devices, such as in nanopipettes, since rinsing off loosely bound silanes may not be possible due to geometric constrictions and because the thickness of multilayered silanes can cover or block nanoscale features. Furthermore, in electrochemical devices, the silane layers experience additional perturbations, such as electric migration and electroosmotic force. Despite its importance, there appears to be no consensus in the current literature on the optimal methodology for nanopipette silanization, with significant variations in reported conditions. Herein, we systematically investigate the reproducibility and stability of liquid- and vapor-phase deposited silane layers inside nanopipettes. Electrochemical monitoring of the changing internal silanized surface reveals that vapor-deposited APTES generates surface modifications with the highest reproducibility, while vapor-deposited APTMS generates surface modifications of the highest stability over a 24-hour time period. Practical issues of silanizing nanoconfined systems are highlighted, and the importance of carefully chosen silanization conditions to yield stable and reproducible monolayers is emphasized as an underappreciated aspect in the development of novel nanoscale systems.
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Affiliation(s)
- Dominik Duleba
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Shekemi Denuga
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Robert P Johnson
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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3
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Peng L, Hsu CC, Xiao C, Bonn D, Weber B. Controlling Macroscopic Friction through Interfacial Siloxane Bonding. PHYSICAL REVIEW LETTERS 2023; 131:226201. [PMID: 38101386 DOI: 10.1103/physrevlett.131.226201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 10/12/2023] [Indexed: 12/17/2023]
Abstract
Controlling macroscopic friction is crucial for numerous natural and industrial applications, ranging from forecasting earthquakes to miniaturizing semiconductor devices, but predicting and manipulating friction phenomena remains a challenge due to the unknown relationship between nanoscale and macroscopic friction. Here, we show experimentally that dry friction at multiasperity Si-on-Si interfaces is dominated by the formation of interfacial siloxane (Si─O─Si) bonds, the density of which can be precisely regulated by exposing plasma-cleaned silicon surfaces to dry nitrogen. Our results show how the bond density can be used to quantitatively understand and control the macroscopic friction. Our findings establish a unique connection between the molecular scale at which adhesion occurs, and the friction coefficient that is the key macroscopic parameter for industrial and natural tribology challenges.
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Affiliation(s)
- Liang Peng
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Chao-Chun Hsu
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Chen Xiao
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, The Netherlands
| | - Daniel Bonn
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Bart Weber
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, The Netherlands
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4
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Moeini B, Pinder JW, Avval TG, Jacobsen C, Brongersma HH, Průša S, Bábík P, Vaníčková E, Argyle MD, Strohmeier BR, Jones B, Shollenberger D, Bell DS, Linford MR. Controlling the surface silanol density in capillary columns and planar silicon via the self-limiting, gas-phase deposition of tris(dimethylamino)methylsilane, and quantification of surface silanols after silanization by low energy ion scattering. J Chromatogr A 2023; 1707:464248. [PMID: 37598532 DOI: 10.1016/j.chroma.2023.464248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/22/2023]
Abstract
Surface silanols (Si-OH) play a vital role on fused silica surfaces in chromatography. Here, we used an atmospheric-pressure, gas-phase reactor to modify the inner surface of a gas chromatography, fused silica capillary column (0.53 mm ID) with a small, reactive silane (tris(dimethylamino)methylsilane, TDMAMS). The deposition of TDMAMS on planar witness samples around the capillary was confirmed with X-ray photoelectron spectroscopy (XPS), ex situ spectroscopic ellipsometry (SE), and wetting. The number of surface silanols on unmodified and TDMAMS-modified native oxide-terminated silicon were quantified by tagging with dimethylzinc (DMZ) via atomic layer deposition (ALD) and counting the resulting zinc atoms with high sensitivity-low energy ion scattering (HS-LEIS). A bare, clean native oxide - terminated silicon wafer has 3.66 OH/nm2, which agrees with density functional theory (DFT) calculations from the literature. After TDMAMS modification of native oxide-terminated silicon, the number of surface silanols decreases by a factor of ca. 10 (to 0.31 OH/nm2). Intermediate surface testing (IST) was used to characterize the surface activities of functionalized capillaries. It suggested a significant deactivation/passivation of the capillary with some surface silanols remaining; the modified capillary shows significant deactivation compared to the native/unmodified fused silica tubing. We believe that this methodology for determining the number of residual silanols on silanized fused silica will be enabling for chromatography.
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Affiliation(s)
- Behnam Moeini
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - Joshua W Pinder
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - Tahereh G Avval
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - Collin Jacobsen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - Hidde H Brongersma
- Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, the Netherlands
| | - Stanislav Průša
- Institute of Physical Engineering, Brno University of Technology, Technická 2, Brno 616 69, Czech Republic; CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Pavel Bábík
- Institute of Physical Engineering, Brno University of Technology, Technická 2, Brno 616 69, Czech Republic; CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Elena Vaníčková
- Institute of Physical Engineering, Brno University of Technology, Technická 2, Brno 616 69, Czech Republic; CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Morris D Argyle
- Department of Chemical Engineering, Brigham Young University, Provo, UT 84602, USA
| | - Brian R Strohmeier
- Materials Group, Avery Dennison Corp., 8080 Norton Parkway, Mentor, OH 44060, USA
| | - Brian Jones
- Restek Corporation, 110 Benner Circle, Bellefonte, PA 16823, USA
| | | | - David S Bell
- Restek Corporation, 110 Benner Circle, Bellefonte, PA 16823, USA
| | - Matthew R Linford
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
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5
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Hemwech P, Obma A, Detsangiamsak S, Wirasate S, Wilairat P, Chantiwas R. Capillary surface modification using millimolar levels of aminosilane reagent for highly efficient separation of phenolic acids and flavonols by capillary electrophoresis with UV detection. PHYTOCHEMICAL ANALYSIS : PCA 2023; 34:621-631. [PMID: 37309090 DOI: 10.1002/pca.3250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 06/14/2023]
Abstract
INTRODUCTION Phytochemical analysis of phenolic acids and flavonols poses a challenge, necessitating the development of an efficient separation method. This facilitates the quantification of these compounds, yielding valuable insights into their benefits. OBJECTIVE To develop a highly effective separation of phenolic acids and flavonols by capillary electrophoresis and ultraviolet (UV) detection through the modification of the capillary surface using 3-aminopropyltriethoxysilane (APTES) at millimolar concentrations. METHODS The capillary surface is modified with 0.36 mM-APTES solution. The electrolyte is 20.0 mM borate buffer (pH 9.0). Separation performance (plate number N, resolution Rs ), stability, and reproducibility of the coating procedure are evaluated using the analysis of phenolic acids, rutin and quercetin. RESULTS The modified capillary provided efficient separation with plate numbers N ≥ 1.0 × 104 m-1 and resolution Rs ≥ 0.8 for all pairs of adjacent peaks of the separation of five selected phenolic acids, rutin, quercetin, caffeine and methylparaben (as internal standard). The precisions of the relative migration times for 17 consecutive analyses of samples over 3 h were 1% relative standard deviation (RSD) for rutin and 7% RSD for quercetin. The analysis of rutin and quercetin in 12 dietary supplement product samples only required a simple dilution step for sample preparation. CONCLUSION A straightforward modification technique utilising millimolar concentrations of APTES resulted in highly efficient separation of phenolic acids, rutin and quercetin, accompanied by high precision and surface stability. The modified capillary proved successful in analysing rutin and quercetin content in dietary supplements.
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Affiliation(s)
- Pattamaporn Hemwech
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Apinya Obma
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Sasinun Detsangiamsak
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Supa Wirasate
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
- Centre for Surface Science and Engineering, Faculty of Science, Mahidol University, Nakhorn Pathom, Thailand
- Rubber Technology Research Centre, Faculty of Science, Mahidol University, Nakhorn Pathom, Thailand
| | - Prapin Wilairat
- Analytical Sciences and National Doping Test Institute, Mahidol University, Bangkok, Thailand
| | - Rattikan Chantiwas
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Bangkok, Thailand
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Marcuello C, Chabbert B, Berzin F, Bercu NB, Molinari M, Aguié-Béghin V. Influence of Surface Chemistry of Fiber and Lignocellulosic Materials on Adhesion Properties with Polybutylene Succinate at Nanoscale. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16062440. [PMID: 36984320 PMCID: PMC10056059 DOI: 10.3390/ma16062440] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/13/2023] [Accepted: 03/14/2023] [Indexed: 06/01/2023]
Abstract
The production of bio-based composites with enhanced characteristics constitutes a strategic action to minimize the use of fossil fuel resources. The mechanical performances of these materials are related to the specific properties of their components, as well as to the quality of the interface between the matrix and the fibers. In a previous research study, it was shown that the polarity of the matrix played a key role in the mechanisms of fiber breakage during processing, as well as on the final properties of the composite. However, some key questions remained unanswered, and new investigations were necessary to improve the knowledge of the interactions between a lignocellulosic material and a polar matrix. In this work, for the first time, atomic force microscopy based on force spectroscopy measurements was carried out using functionalized tips to characterize the intermolecular interactions at the single molecule level, taking place between poly(butylene succinate) and four different plant fibers. The efficiency of the tip functionalization was checked out by scanning electron microscopy and energy-dispersive X-ray spectroscopy, whereas the fibers chemistry was characterized by Fourier-transform infrared spectroscopy. Larger interactions at the nanoscale level were found between the matrix and hypolignified fibers compared to lignified ones, as in control experiments on single lignocellulosic polymer films. These results could significantly aid in the design of the most appropriate composite composition depending on its final use.
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Affiliation(s)
- Carlos Marcuello
- Université de Reims Champagne Ardenne, INRAE, FARE, 51097 Reims, France
| | - Brigitte Chabbert
- Université de Reims Champagne Ardenne, INRAE, FARE, 51097 Reims, France
| | - Françoise Berzin
- Université de Reims Champagne Ardenne, INRAE, FARE, 51097 Reims, France
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Smirnova A, Ohta R, Mori E, Shimizu H, Morikawa K, Kitamori T. Enzyme-linked immunosorbent assay using thin-layered microfluidics with perfect capture of the target protein. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:675-684. [PMID: 36655604 DOI: 10.1039/d2ay01686a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We developed a process for enzyme-linked immunosorbent assay on a glass microchip via the use of a thin-layered microfluidic channel. This channel possesses a high aspect ratio (width/depth ∼200) and has an antibody layer immobilized directly on the channel surface. A depth of several microns and an excessive width and length (mm scale) of the channel provide a large-volume capacity (102 nL) and maximum capture efficiency of the analyte for a high level of detection sensitivity (102 pg mL-1). The developed reusable immunosensor has demonstrated high-performance characteristics by requiring less than 50 μL of sample and providing analysis in less than 25 min. This new method could impact the development of point-of-care devices for biomedical applications.
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Affiliation(s)
- Adelina Smirnova
- Collaborative Research Organization for Micro and Nano Multifunctional Devices, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8656, Japan.
| | - Ryoichi Ohta
- Collaborative Research Organization for Micro and Nano Multifunctional Devices, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8656, Japan.
| | - Emi Mori
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8656, Japan
| | - Hisashi Shimizu
- Collaborative Research Organization for Micro and Nano Multifunctional Devices, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8656, Japan.
| | - Kyojiro Morikawa
- Collaborative Research Organization for Micro and Nano Multifunctional Devices, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8656, Japan.
- Institute of Nanoengineering and Microsystems, Department of Power Mechanical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan, Republic of China
| | - Takehiko Kitamori
- Collaborative Research Organization for Micro and Nano Multifunctional Devices, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8656, Japan.
- Institute of Nanoengineering and Microsystems, Department of Power Mechanical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan, Republic of China
- Department of Biomedical Engineering, Faculty of Engineering, Lund University, Lund 221 00, Sweden
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Sypabekova M, Hagemann A, Rho D, Kim S. Review: 3-Aminopropyltriethoxysilane (APTES) Deposition Methods on Oxide Surfaces in Solution and Vapor Phases for Biosensing Applications. BIOSENSORS 2022; 13:bios13010036. [PMID: 36671871 PMCID: PMC9856095 DOI: 10.3390/bios13010036] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/19/2022] [Accepted: 12/23/2022] [Indexed: 05/31/2023]
Abstract
Surface functionalization and bioreceptor immobilization are critical processes in developing a highly sensitive and selective biosensor. The silanization process with 3-aminopropyltriethoxysilane (APTES) on oxide surfaces is frequently used for surface functionalization because of beneficial characteristics such as its bifunctional nature and low cost. Optimizing the deposition process of the APTES layer to obtain a monolayer is crucial to having a stable surface and effectively immobilizing the bioreceptors, which leads to the improved repeatability and sensitivity of the biosensor. This review provides an overview of APTES deposition methods, categorized into the solution-phase and vapor-phase, and a comprehensive summary and guide for creating stable APTES monolayers on oxide surfaces for biosensing applications. A brief explanation of APTES is introduced, and the APTES deposition methods with their pre/post-treatments and characterization results are discussed. Lastly, APTES deposition methods on nanoparticles used for biosensors are briefly described.
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Affiliation(s)
- Marzhan Sypabekova
- Department of Electrical & Computer Engineering, Baylor University, Waco, TX 76798, USA
| | - Aidan Hagemann
- Department of Electrical & Computer Engineering, Baylor University, Waco, TX 76798, USA
| | - Donggee Rho
- Center for Nano Bio Development, National NanoFab Center (NNFC), Daejeon 34141, Republic of Korea
| | - Seunghyun Kim
- Department of Electrical & Computer Engineering, Baylor University, Waco, TX 76798, USA
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Lee HG, Roh S, Kim HJ, Kim S, Hong Y, Lee G, Jeon OH. Nanoscale biophysical properties of small extracellular vesicles from senescent cells using atomic force microscopy, surface potential microscopy, and Raman spectroscopy. NANOSCALE HORIZONS 2022; 7:1488-1500. [PMID: 36111604 DOI: 10.1039/d2nh00220e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cells secrete extracellular vesicles (EVs) carrying cell-of-origin markers to communicate with surrounding cells. EVs regulate physiological processes ranging from intercellular signaling to waste management. However, when senescent cells (SnCs) secrete EVs, the EVs, which are newly regarded as senescence-associated secretory phenotype (SASP) factors, can evoke inflammation, senescence induction, and metabolic disorders in neighboring cells. Unlike other soluble SASP factors, the biophysical properties of EVs, including small EVs (sEVs), derived from SnCs have not yet been investigated. In this study, sEVs were extracted from a human IMR90 lung fibroblast in vitro senescence model. Their biomechanical properties were mapped using atomic force microscopy-based quantitative nanomechanical techniques, surface potential microscopy, and Raman spectroscopy. The surfaces of sEVs derived from SnCs are slightly stiffer but their cores are softer than those of sEVs secreted from non-senescent cells (non-SnCs). This inversely proportional relationship between deformation and stiffness, attributed to a decrease in the concentration of genetic and protein materials inside the vesicles and the adsorption of positively charged SASP factors onto the vesicle surfaces, respectively, was found to be a peculiar characteristic of SnC-derived sEVs. Our results demonstrate that the biomechanical properties of SnC-derived sEVs differ from those of non-SnC-derived sEVs and provide insight into the mechanisms underlying their formation and composition.
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Affiliation(s)
- Hyo Gyeong Lee
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul 02841, Republic of Korea.
| | - Seokbeom Roh
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Republic of Korea.
- Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong 30019, Republic of Korea
| | - Hyun Jung Kim
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Republic of Korea.
- Department of Medical Device, Korea Institute of Machinery and Materials (KIMM), Daegu 42994, Republic of Korea.
| | - Seokho Kim
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Republic of Korea
| | - Yoochan Hong
- Department of Medical Device, Korea Institute of Machinery and Materials (KIMM), Daegu 42994, Republic of Korea.
| | - Gyudo Lee
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Republic of Korea.
- Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong 30019, Republic of Korea
| | - Ok Hee Jeon
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul 02841, Republic of Korea.
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Hwang Y, Koo DJ, Ferhan AR, Sut TN, Yoon BK, Cho NJ, Jackman JA. Optimizing Plasmonic Gold Nanorod Deposition on Glass Surfaces for High-Sensitivity Refractometric Biosensing. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3432. [PMID: 36234560 PMCID: PMC9565783 DOI: 10.3390/nano12193432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/13/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
Owing to high surface sensitivity, gold nanorods (AuNRs) are widely used to construct surface-based nanoplasmonic biosensing platforms for label-free molecular diagnostic applications. A key fabrication step involves controlling AuNR deposition onto the target surface, which requires maximizing surface density while minimizing inter-particle aggregation, and is often achieved by surface functionalization with a self-assembled monolayer (SAM) prior to AuNR deposition. To date, existing studies have typically used a fixed concentration of SAM-forming organic molecules (0.2-10% v/v) while understanding how SAM density affects AuNR deposition and resulting sensing performance would be advantageous. Herein, we systematically investigated how controlling the (3-aminopropyl)triethoxysilane (APTES) concentration (1-30% v/v) during SAM preparation affects the fabrication of AuNR-coated glass surfaces for nanoplasmonic biosensing applications. Using scanning electron microscopy (SEM) and UV-visible spectroscopy, we identified an intermediate APTES concentration range that yielded the highest density of individually deposited AuNRs with minimal aggregation and also the highest peak wavelength in aqueous solution. Bulk refractive index sensitivity measurements indicated that the AuNR configuration had a strong effect on the sensing performance, and the corresponding wavelength-shift responses ranged from 125 to 290 nm per refractive index unit (RIU) depending on the APTES concentration used. Biosensing experiments involving protein detection and antigen-antibody interactions further demonstrated the high surface sensitivity of the optimized AuNR platform, especially in the low protein concentration range where the measurement shift was ~8-fold higher than that obtained with previously used sensing platforms.
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Affiliation(s)
- Youngkyu Hwang
- School of Chemical Engineering and Translational Nanobioscience Research Center, Sungkyunkwan University, Suwon 16419, Korea
| | - Dong Jun Koo
- School of Chemical Engineering and Translational Nanobioscience Research Center, Sungkyunkwan University, Suwon 16419, Korea
| | - Abdul Rahim Ferhan
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Tun Naw Sut
- School of Chemical Engineering and Translational Nanobioscience Research Center, Sungkyunkwan University, Suwon 16419, Korea
| | - Bo Kyeong Yoon
- School of Healthcare and Biomedical Engineering, Chonnam National University, Yeosu 59626, Korea
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Joshua A. Jackman
- School of Chemical Engineering and Translational Nanobioscience Research Center, Sungkyunkwan University, Suwon 16419, Korea
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11
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Ambrosetti E, Conti M, Teixeira AI, Zilio SD. Patterned Carboxymethyl-Dextran Functionalized Surfaces Using Organic Mixed Monolayers for Biosensing Applications. ACS APPLIED BIO MATERIALS 2022; 5:3310-3319. [PMID: 35758041 PMCID: PMC9297292 DOI: 10.1021/acsabm.2c00311] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The deposition of
biomolecules on biosensing surface platforms
plays a key role in achieving the required sensitivity and selectivity
for biomolecular interactions analysis. Controlling the interaction
between the surface and biomolecules is increasingly becoming a crucial
design tool to modulate the surface properties needed to improve the
performance of the assay and the detection outcome. Carboxymethyl-dextran
(CMD) coating can be exploited to promote chemical grafting of proteins,
providing a hydrophilic, bioinert, nonfouling surface and a high surface
density of immobilized proteins. In the present work, we developed
and optimized a technique to produce a cost-effective CMD-based patterned
surface for the immobilization of biomolecules to be used on standard
protocols optimization. They consist of silicon or glass substrates
with patterned bioactive areas able to efficiently confine the sampling
solution by simply exploiting hydrophilic/hydrophobic patterning of
the surface. The fabrication process involves the use of low-cost
instruments and techniques, compatible with large scale production.
The devices were validated through a chemiluminescence assay we recently
developed for the analysis of binding of DNA nanoassemblies modified
with an affinity binder to target proteins immobilized on the bioactive
areas. Through this assay we were able to characterize the chemical
reactivity of two target proteins toward a dextran matrix on patterned
surfaces and to compare it with model CMD-based surface plasmon resonance
(SPR) surfaces. We found a high reproducibility and selectivity in
molecular recognition, consistent with results obtained on SPR sensor
surfaces. The suggested approach is straightforward, cheap, and provides
the means to assess patterned functionalized surfaces for bioanalytical
platforms.
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Affiliation(s)
- Elena Ambrosetti
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Martina Conti
- CNR-IOM, Istituto Officina dei Materiali-Consiglio Nazionale delle Ricerche, Basovizza, 34149 Trieste, Italy
| | - Ana I Teixeira
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 77, Sweden
| | - Simone Dal Zilio
- CNR-IOM, Istituto Officina dei Materiali-Consiglio Nazionale delle Ricerche, Basovizza, 34149 Trieste, Italy
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12
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Wu D, Tan L, Ma C, Pan F, Cai W, Li J, Kong Y. Competitive Self-Assembly Interaction between Ferrocenyl Units and Amino Acids for Entry into the Cavity of β-Cyclodextrin for Chiral Electroanalysis. Anal Chem 2022; 94:6050-6056. [PMID: 35389624 DOI: 10.1021/acs.analchem.2c00777] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
At present, chiral electroanalysis of nonelectroactive chiral compounds still remains a challenge because they cannot provide an electrochemical signal by themselves. Here, a strategy based on a competitive self-assembly interaction of a ferrocene (Fc) unit and the testing isomers entering into the cavity of β-cyclodextrin (β-CD) was carried out for chiral electroanalysis. First of all, the Fc derivative was directly bridged to silica microspheres, followed by inclusion into the cavity of β-CD. As expected, once it was modified onto the surface of a carbon working electrode as an electrochemical sensor, SiO2@Fc-CD-WE, its differential pulse voltammetry signal would markedly decrease compared with the uncovered Fc. Next, when l- and d-isomers of amino acids that included histidine, threonine, phenylalanine, and glutamic acid were examined using SiO2@Fc-CD-WE, it showed an enantioselective entry of amino acids into the cavity of β-cyclodextrin instead of Fc, resulting in the release of Fc with signal enhancement. For histidine, glutamic acid, and threonine, l-isomers showed a higher peak current response compared with d-isomers. The peak current ratios between l- and d-isomers were 2.88, 1.21, and 1.40, respectively. At the same time, the opposite phenomenon occurred for phenylalanine with a peak current ratio of 3.19 between d- and l-isomers. In summary, we are assured that the recognition strategy based on the supramolecular interaction can enlarge the detection range of chiral compounds by electrochemical analysis.
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Affiliation(s)
- Datong Wu
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Lilan Tan
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Cong Ma
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Fei Pan
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Wenrong Cai
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Junyao Li
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Yong Kong
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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13
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Ding Z, Chen C, Yu Y, de Beer S. Synthetic strategies to enhance the long-term stability of polymer brush coatings. J Mater Chem B 2022; 10:2430-2443. [DOI: 10.1039/d1tb02605d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-density, end-anchored macromolecules that form so-called polymer brushes are popular components of bio-inspired surface coatings. In a bio-memetic approach, they have been utilized to reduce friction, repel contamination and control...
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14
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Abrams AS, Eden A, Zhou L, Wang B, Huber DE, Pennathur S. Real-Time Zeta Potential Analysis of Microchannel Surfaces during Aminosilane Deposition and Exposure Using Current Monitoring. Anal Chem 2021; 93:16512-16519. [PMID: 34851604 DOI: 10.1021/acs.analchem.1c03628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Surface coatings are extensively used in capillary electrophoresis to increase separation efficiency and resolution. The stability of these coatings across a wide pH range is desirable to achieve repeatable migration times; therefore, a comprehensive understanding of coating degradation timescales is needed. We present a novel platform for automated zeta potential analysis based upon current monitoring that delivers improved time resolution over the existing methods. Using our platform, we measure the zeta potential continuously during aminosilane coating reactions and infer changes in the surface composition. We found that the change in the zeta potential after coating depended on the monomer type and solvent, while its stability was influenced by the coating solvent and exposure pH. Our versatile platform provides an elegant approach for evaluating the molecular composition, reactivity, and stability of surfaces in real time.
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Affiliation(s)
- Austin S Abrams
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Alexander Eden
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Lingyun Zhou
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Bing Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - David E Huber
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Sumita Pennathur
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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15
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Layer-by-layer assembly of nanofilms from colloidally stable amine-functionalized silica nanoparticles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127615] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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16
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Soler M, Lechuga LM. Biochemistry strategies for label-free optical sensor biofunctionalization: advances towards real applicability. Anal Bioanal Chem 2021; 414:5071-5085. [PMID: 34735605 PMCID: PMC9242939 DOI: 10.1007/s00216-021-03751-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/18/2021] [Accepted: 10/22/2021] [Indexed: 12/01/2022]
Abstract
Label-free biosensors, and especially those based on optical transducers like plasmonic or silicon photonic systems, have positioned themselves as potential alternatives for rapid and highly sensitive clinical diagnostics, on-site environmental monitoring, and for quality control in foods or other industrial applications, among others. However, most of the biosensor technology has not yet been transferred and implemented in commercial products. Among the several causes behind that, a major challenge is the lack of standardized protocols for sensor biofunctionalization. In this review, we summarize the most common methodologies for sensor surface chemical modification and bioreceptor immobilization, discussing their advantages and limitations in terms of analytical sensitivity and selectivity, reproducibility, and versatility. Special focus is placed on the suggestions of innovative strategies towards antifouling and biomimetic functional coatings to boost the applicability and reliability of optical biosensors in clinics and biomedicine. Finally, a brief overview of research directions in the area of device integration, automation, and multiplexing will give a glimpse of the future perspectives for label-free optical biosensors.
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Affiliation(s)
- Maria Soler
- Nanobiosensors and Bioanalytical Applications Group (NanoB2A), Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, BIST, and CIBER-BBN, Bellaterra, 08193, Barcelona, Spain.
| | - Laura M Lechuga
- Nanobiosensors and Bioanalytical Applications Group (NanoB2A), Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, BIST, and CIBER-BBN, Bellaterra, 08193, Barcelona, Spain
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17
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Nakatsuka N, Faillétaz A, Eggemann D, Forró C, Vörös J, Momotenko D. Aptamer Conformational Change Enables Serotonin Biosensing with Nanopipettes. Anal Chem 2021; 93:4033-4041. [PMID: 33596063 DOI: 10.1021/acs.analchem.0c05038] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report artificial nanopores in the form of quartz nanopipettes with ca. 10 nm orifices functionalized with molecular recognition elements termed aptamers that reversibly recognize serotonin with high specificity and selectivity. Nanoscale confinement of ion fluxes, analyte-specific aptamer conformational changes, and related surface charge variations enable serotonin sensing. We demonstrate detection of physiologically relevant serotonin amounts in complex environments such as neurobasal media, in which neurons are cultured in vitro. In addition to sensing in physiologically relevant matrices with high sensitivity (picomolar detection limits), we interrogate the detection mechanism via complementary techniques such as quartz crystal microbalance with dissipation monitoring and electrochemical impedance spectroscopy. Moreover, we provide a novel theoretical model for structure-switching aptamer-modified nanopipette systems that supports experimental findings. Validation of specific and selective small-molecule detection, in parallel with mechanistic investigations, demonstrates the potential of conformationally changing aptamer-modified nanopipettes as rapid, label-free, and translatable nanotools for diverse biological systems.
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Affiliation(s)
- Nako Nakatsuka
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Alix Faillétaz
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Dominic Eggemann
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Csaba Forró
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - János Vörös
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Dmitry Momotenko
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
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18
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Jiang T, Moghaddam SZ, Thormann E. A pH-responsive polyelectrolyte multilayer film with tunable interfacial properties. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123367] [Citation(s) in RCA: 4] [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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19
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Darpentigny C, Sillard C, Menneteau M, Martinez E, Marcoux PR, Bras J, Jean B, Nonglaton G. Antibacterial Cellulose Nanopapers via Aminosilane Grafting in Supercritical Carbon Dioxide. ACS APPLIED BIO MATERIALS 2020; 3:8402-8413. [PMID: 35019612 DOI: 10.1021/acsabm.0c00688] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this work, we present an innovative strategy for the grafting of an antibacterial agent onto nanocellulose materials in supercritical carbon dioxide (scCO2). Dense cellulose nanofibril (CNF) nanopapers were prepared and subsequently functionalized in supercritical carbon dioxide with an aminosilane, N-(6-aminohexyl)aminopropyltrimethoxysilane (AHA-P-TMS). Surface characterization (X-ray photoelectron spectroscopy, contact angle, ζ-potential analysis) evidenced the presence of the aminosilane. The results show that the silane conformation depends on the curing process: a nonpolycondensed conformation of grafted silane with the amino groups facing outwards was favored by curing in an oven, while the curing step performed in scCO2 yielded CNF structures with the alkyl chain facing outwards. The grafted nanopapers exhibited antibacterial activity, and no antibacterial agent was released into the media. Furthermore, these materials proved to benefit from low cytotoxicity. This study offers a proof of concept for the covalent grafting of active species on nanocellulose structures and the control of aminosilane orientation using a green and controlled approach. These newly designed materials could be used for their antibacterial activity in the biomedical field. Thus, perspectives for topical administration and design of wound dressing could be envisaged.
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Affiliation(s)
- Clémentine Darpentigny
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France.,Univ. Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France.,Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - Cécile Sillard
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
| | - Mathilde Menneteau
- Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - Eugénie Martinez
- Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - Pierre R Marcoux
- Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F-38054 Grenoble, France
| | - Julien Bras
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
| | - Bruno Jean
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
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20
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Zeb S, Ali N, Ali Z, Bilal M, Adalat B, Hussain S, Gul S, Ali F, Ahmad R, khan S, Iqbal HM. Silica-based nanomaterials as designer adsorbents to mitigate emerging organic contaminants from water matrices. JOURNAL OF WATER PROCESS ENGINEERING 2020. [DOI: 10.1016/j.jwpe.2020.101675] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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21
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Plasma Activation as a Powerful Tool for Selective Modification of Cellulose Fibers towards Biomedical Applications. PLASMA 2020. [DOI: 10.3390/plasma3040015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Cellulosic substrates are known for their biocompatibility, non-cytotoxicity, hypoallergenicity and sterilizability. It is therefore desirable to have a bundle of methods to equip them with tailored properties such as affinity profiles for various applications. In the case of highly swelling materials such as cellulose sponges, “dry” functionalization using plasma activation is the method of choice. The purpose of the study was to adapt low-pressure plasma technology for targeted cellulose modification. Using plasma (pre-) treatment combined with gaseous reactants like O2, ethylene oxide or silane, three different cellulose modifications were obtained and characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). Swelling measurements and bacterial adhesion tests revealed distinctive material properties compared to educt. The development of these non-aqueous methods demonstrated an effective procedural route towards modified cellulosic materials for usage in wound dressing, micro patterned assays or bacterial filtration.
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22
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Deshmukh AP, Bailey AD, Forte LS, Shen X, Geue N, Sletten EM, Caram JR. Thermodynamic Control over Molecular Aggregate Assembly Enables Tunable Excitonic Properties across the Visible and Near-Infrared. J Phys Chem Lett 2020; 11:8026-8033. [PMID: 32876461 DOI: 10.1021/acs.jpclett.0c02204] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Specific molecular arrangements within H-/J-aggregates of cyanine dyes enable extraordinary photophysical properties, including long-range exciton delocalization, extreme blue/red shifts, and excitonic superradiance. Despite extensive literature on cyanine aggregates, design principles that drive the self-assembly to a preferred H- or J-aggregated state are unknown. We tune the thermodynamics of self-assembly via independent control of the solvent/nonsolvent ratio, ionic strength, or dye concentration, obtaining a broad range of conditions that predictably stabilize the monomer (H-/J-aggregate). Diffusion-ordered spectroscopy, cryo-electron microscopy, and atomic force microscopy together reveal a dynamic equilibrium between monomers, H-aggregated dimers, and extended J-aggregated 2D monolayers. We construct a model that predicts the equilibrium composition for a range of standard Gibbs free energies, providing a vast aggregation space which we access using the aforementioned solvation factors. We demonstrate the universality of this approach among several sheet-forming cyanine dyes with tunable absorptions spanning visible, near, and shortwave infrared wavelengths.
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Affiliation(s)
- Arundhati P Deshmukh
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
| | - Austin D Bailey
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
| | - Leandra S Forte
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
| | - Xingyu Shen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Niklas Geue
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
- Department of Chemistry and Mineralogy, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany
| | - Ellen M Sletten
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
| | - Justin R Caram
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095, United States
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23
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Ashraf K, Roy K, Higgins DA, Collinson MM. On the Importance of Silane Infusion Order on the Microscopic and Macroscopic Properties of Multifunctional Charge Gradients. ACS OMEGA 2020; 5:21897-21905. [PMID: 32905528 PMCID: PMC7469646 DOI: 10.1021/acsomega.0c03068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Four multicomponent charge gradients containing acidic and basic functionalities were prepared via sol-gel processes and the controlled-rate infusion (CRI) method to more clearly understand how preparation conditions influence macroscopic properties. CRI is used to form gradients by infusing reactive alkoxysilanes into a glass vial housing a vertically oriented modified silicon wafer. The concentration and time of infusion of the silane solutions were kept constant. Only the sequence of infusion of the silane solutions was changed. The first set of samples was prepared by initially infusing a solution containing 3-aminopropyltriethoxysilane (APTES) followed by a mercaptopropyltrimethoxysilane (MPTMS) solution. The individual gradients were formed either in an aligned or opposed fashion with respect to the initial gradient. The second set of samples was prepared by infusing the MPTMS solution first followed by the APTES solution, again in either an aligned or opposed fashion. To create charge gradients (NH3 +, SO3 -), the samples were immersed into H2O2. The extent of modification, the degree of protonation of the amine, and the thicknesses of the individual layers were examined by X-ray photoelectron spectroscopy (XPS) and spectroscopic ellipsometry. The wettability of the individual gradients was assessed via static contact angle measurements. The results demonstrate the importance of infusion order and how it influences the macroscopic and microscopic properties of gradient surfaces including the surface concentration, packing density, degree of protonation, and ultimately wettability. When the gradient materials are prepared via infusion of the APTES sol first, it results in increased deposition of both the amine and thiol groups as evidenced by XPS. Interestingly, the total thickness evaluated from ellipsometry was independent of the infusion order for the aligned gradients, indicative of significant differences in the film density. For the opposed gradients, however, the infusion of APTES first leads to a significantly thicker composite film. Furthermore, it also leads to a more pronounced gradient in the protonation of the amine, which introduces a very different surface wettability. The use of aminosilanes provides a viable approach to create gradient surfaces with different functional group distributions. These studies demonstrate that the controlled placement of functional groups on a surface can provide a new route to prepare gradient materials with improved performance.
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Affiliation(s)
- Kayesh
M. Ashraf
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Kallol Roy
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Daniel A. Higgins
- Department
of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401, United States
| | - Maryanne M. Collinson
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
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24
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Brió
Pérez M, Cirelli M, de Beer S. Degrafting of Polymer Brushes by Exposure to Humid Air. ACS APPLIED POLYMER MATERIALS 2020; 2:3039-3043. [PMID: 34124685 PMCID: PMC8192051 DOI: 10.1021/acsapm.0c00474] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 07/08/2020] [Indexed: 05/22/2023]
Abstract
It is well-known that polymer brushes can degraft in aqueous liquids. Here we show that brushes can deteriorate in humid air too. We observe that the detachment rate of the brushes increases with increasing relative humidity and hydrophilicity of the brushes. We relate this to the increase in water absorption as these parameters are increased. Our results imply that protective measures that are at present being developed for applications of brushes in liquids will also be key in enabling the long-term storage and utilization of hydrophilic brushes in air.
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Affiliation(s)
- Maria Brió
Pérez
- Materials Science and Technology of
Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Marco Cirelli
- Materials Science and Technology of
Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Sissi de Beer
- Materials Science and Technology of
Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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25
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Badv M, Bayat F, Weitz JI, Didar TF. Single and multi-functional coating strategies for enhancing the biocompatibility and tissue integration of blood-contacting medical implants. Biomaterials 2020; 258:120291. [PMID: 32798745 DOI: 10.1016/j.biomaterials.2020.120291] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/27/2020] [Accepted: 08/01/2020] [Indexed: 12/27/2022]
Abstract
Device-associated clot formation and poor tissue integration are ongoing problems with permanent and temporary implantable medical devices. These complications lead to increased rates of mortality and morbidity and impose a burden on healthcare systems. In this review, we outline the current approaches for developing single and multi-functional surface coating techniques that aim to circumvent the limitations associated with existing blood-contacting medical devices. We focus on surface coatings that possess dual hemocompatibility and biofunctionality features and discuss their advantages and shortcomings to providing a biocompatible and biodynamic interface between the medical implant and blood. Lastly, we outline the newly developed surface modification techniques that use lubricant-infused coatings and discuss their unique potential and limitations in mitigating medical device-associated complications.
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Affiliation(s)
- Maryam Badv
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada; Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Fereshteh Bayat
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Jeffrey I Weitz
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada; Thrombosis & Atherosclerosis Research Institute (TaARI), Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Tohid F Didar
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada; Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada; Institute for Infectious Disease Research (IIDR), McMaster University, Hamilton, Ontario, Canada.
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26
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Keuter J, Schwermann C, Hepp A, Bergander K, Droste J, Hansen MR, Doltsinis NL, Mück-Lichtenfeld C, Lips F. A highly unsaturated six-vertex amido-substituted silicon cluster. Chem Sci 2020; 11:5895-5901. [PMID: 32874511 PMCID: PMC7448375 DOI: 10.1039/d0sc01427c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/10/2020] [Indexed: 11/21/2022] Open
Abstract
Thermal treatment of the bicyclo[1.1.0]tetrasilatetraamide [Si4{N(SiMe3)Dipp}4] 1 resulted in the formation of a highly unsaturated six-vertex silicon cluster [Si6{N(SiMe3)Dipp}4] 2 with only four amine-substituents and two ligand-free silicon atoms. In solution, a major and a minor conformer of this cluster are in equilibrium according to multinuclear NMR spectroscopy, lineshape analysis, DFT calculations and molecular dynamics simulations. The bonding situation in the highly unsaturated cluster features lone pair type character at the ligand-free silicon atoms and partial single and double bond character in the upper butterfly-shaped ring of 2. This allows to consider 2 as the silicon analogue of a butalene isomer.
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Affiliation(s)
- Jan Keuter
- Westfälische Wilhelms-Universität Münster , Institut für Anorganische und Analytische Chemie , Corrensstraße 28-30 , 48149 Münster , Germany
| | - Christian Schwermann
- Westfälische Wilhelms-Universität Münster , Institut für Festkörpertheorie , Center for Multiscale Theory and Computation , Wilhelm-Klemm-Straße 10 , 48149 Münster , Germany
| | - Alexander Hepp
- Westfälische Wilhelms-Universität Münster , Institut für Anorganische und Analytische Chemie , Corrensstraße 28-30 , 48149 Münster , Germany
| | - Klaus Bergander
- Westfälische Wilhelms-Universität Münster , Organisch-Chemisches Institut , Center for Multiscale Theory and Computation , Corrensstraße 40 , 48149 Münster , Germany
| | - Jörn Droste
- Westfälische Wilhelms-Universität Münster , Institut für Physikalische Chemie , Corrensstraße 30 , 48149 Münster , Germany
| | - Michael Ryan Hansen
- Westfälische Wilhelms-Universität Münster , Institut für Physikalische Chemie , Corrensstraße 30 , 48149 Münster , Germany
| | - Nikos L Doltsinis
- Westfälische Wilhelms-Universität Münster , Institut für Festkörpertheorie , Center for Multiscale Theory and Computation , Wilhelm-Klemm-Straße 10 , 48149 Münster , Germany
| | - Christian Mück-Lichtenfeld
- Westfälische Wilhelms-Universität Münster , Organisch-Chemisches Institut , Center for Multiscale Theory and Computation , Corrensstraße 40 , 48149 Münster , Germany
| | - Felicitas Lips
- Westfälische Wilhelms-Universität Münster , Institut für Anorganische und Analytische Chemie , Corrensstraße 28-30 , 48149 Münster , Germany
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27
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Effect of Cellulose Microfiber Silylation Procedures on the Properties and Antibacterial Activity of Polydimethylsiloxane. COATINGS 2020. [DOI: 10.3390/coatings10060567] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the liquid phase and vapor phase procedures for silylating cellulose microfibers by hexamethyldisilazane (HMDS) were compared in terms of efficiency. The influence of functionalization degree on the morphology of microfibers and their interaction with polydimethylsiloxane (PDMS) matrix has been investigated. The antibacterial properties of silylated cellulose microfibers hybridized with Ag nanoparticles, obtained by in situ chemical reduction, were also studied. Sample morphology investigations were carried out using spectroscopy and microscopy techniques (FTIR, XPS, TEM, SEM, EDS, XPS). Trimethylsilyl moieties appear on the surface of the cellulose microfibers after modification and improve the dispersibility of the microfibers, allowing strong interaction with the PDMS matrix and favoring its crosslinking density. Microfibers functionalized by the vapor phase of HMDS show smoother surfaces with higher concentrations of Si-containing groups, resulting in a more hydrophobic wetting behavior and a greater influence on the mechanical properties of the polymer. The silylated cellulose microfiber–Ag nanohybrid shows stronger antimicrobial activity towards Gram-positive and Gram-negative bacteria strains compared to that of the untreated hybrid. A PDMS composite loaded with this hybrid exhibits the ability to inhibit bacterial growth.
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28
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Lee TJ, Chau LK, Huang CJ. Controlled Silanization: High Molecular Regularity of Functional Thiol Groups on Siloxane Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:5935-5943. [PMID: 32388989 DOI: 10.1021/acs.langmuir.0c00745] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A comparative study on deposition and molecular regularity of two organosilanes, i.e., commercially available (3-mercaptopropyl)trimethoxysilane (MPTMS) and newly developed mercaptopropylsilatrane (MPS), was conducted in this work. MPTMS and MPS were applied to modify silicon surfaces to characterize their deposition kinetics, surface morphology, thickness, and elemental composition and the reactivity of thiol end groups based on gold-thiol and thiol-ene chemistries. MPS possesses a tricyclic caged structure and a transannular N → Si dative bond, making it chemically stable and controllable to avoid fast hydrolysis and aggregation in solution. The results indicate that MPS allows faster deposition and better formation of thin and homogeneous films than MPTMS. More importantly, the functional thiol groups on MPS coatings enable immobilization of a large amount of gold nanoparticles and effective thiol-ene photopolymerization with zwitterionic sulfobetaine acrylamide. Postmodification on silanized surfaces with MPS endows excellent plasmonic and antifouling properties, potentially leading to valuable applications to biosensing and biomaterials. The work demonstrated the feasibility and applicability of the functional silatrane molecule for surface silanization in a controlled manner.
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Affiliation(s)
- Tien-Jung Lee
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Lai-Kwan Chau
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection, National Chung Cheng University, Chiayi 621, Taiwan
| | - Chun-Jen Huang
- Department of Biomedical Sciences and Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, 200 Chung Pei Rd., Chung-Li City 32023, Taiwan
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29
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Impact of Silanization Parameters and Antibody Immobilization Strategy on Binding Capacity of Photonic Ring Resonators. SENSORS 2020; 20:s20113163. [PMID: 32498466 PMCID: PMC7309079 DOI: 10.3390/s20113163] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 12/27/2022]
Abstract
Ring resonator-based biosensors have found widespread application as the transducing principle in “lab-on-a-chip” platforms due to their sensitivity, small size and support for multiplexed sensing. Their sensitivity is, however, not inherently selective towards biomarkers, and surface functionalization of the sensors is key in transforming the sensitivity to be specific for a particular biomarker. There is currently no consensus on process parameters for optimized functionalization of these sensors. Moreover, the procedures are typically optimized on flat silicon oxide substrates as test systems prior to applying the procedure to the actual sensor. Here we present what is, to our knowledge, the first comparison of optimization of silanization on flat silicon oxide substrates to results of protein capture on sensors where all parameters of two conjugation protocols are tested on both platforms. The conjugation protocols differed in the chosen silanization solvents and protein immobilization strategy. The data show that selection of acetic acid as the solvent in the silanization step generally yields a higher protein binding capacity for C-reactive protein (CRP) onto anti-CRP functionalized ring resonator sensors than using ethanol as the solvent. Furthermore, using the BS3 linker resulted in more consistent protein binding capacity across the silanization parameters tested. Overall, the data indicate that selection of parameters in the silanization and immobilization protocols harbor potential for improved biosensor binding capacity and should therefore be included as an essential part of the biosensor development process.
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30
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A single-component, cross-linked, and surface-grafted polyelectrolyte film fabricated by the layer-by-layer assembly method. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Li M, Aveyard J, Fleming G, Curran JM, McBride F, Raval R, D'Sa RA. Nitric Oxide Releasing Titanium Surfaces for Antimicrobial Bone-Integrating Orthopedic Implants. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22433-22443. [PMID: 32320193 DOI: 10.1021/acsami.0c00871] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Titanium implants in orthopedic applications can fail due to infection and impaired integration into the host. Most research efforts that facilitate osseointegration of the implant have not considered infection, and vice versa. Moreover, most infection control measures involve the use of conventional antibiotics which contributes to the global epidemic of antimicrobial resistance. Nitric oxide (NO) is a promising alternative to antibiotics, and while researchers have investigated NO releasing coatings, there are few reports on the function/robustness or the mechanism of NO release. Our comprehensive mechanistic study has allowed us to design, characterize, and optimize NO releasing coatings to achieve maximum antimicrobial efficacy toward bacteria with minimum cytotoxicity to human primary osteoblasts in vitro. As the antibiotic era is coming to an end and the future of infection control continues to demand new alternatives, the coatings described herein represent a promising therapeutic strategy for use in orthopedic surgeries.
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Affiliation(s)
- Man Li
- School of Engineering, University of Liverpool, Liverpool L69 3GH, U.K
| | - Jenny Aveyard
- School of Engineering, University of Liverpool, Liverpool L69 3GH, U.K
| | - George Fleming
- School of Engineering, University of Liverpool, Liverpool L69 3GH, U.K
| | - Judith M Curran
- School of Engineering, University of Liverpool, Liverpool L69 3GH, U.K
| | - Fiona McBride
- The Open Innovation Hub for Antimicrobial Surfaces, Surface Science Research Centre, Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K
| | - Rasmita Raval
- The Open Innovation Hub for Antimicrobial Surfaces, Surface Science Research Centre, Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K
| | - Raechelle A D'Sa
- School of Engineering, University of Liverpool, Liverpool L69 3GH, U.K
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32
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Zamrik I, Bayat H, Alhusaini Q, Raoufi M, Schönherr H. In Situ Study of Layer-by-Layer Polyelectrolyte Deposition in Nanopores of Anodic Aluminum Oxide by Reflectometric Interference Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1907-1915. [PMID: 32009415 DOI: 10.1021/acs.langmuir.9b03769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The modification of cylindrical anodic aluminum oxide (AAO) nanopores by alternating layer-by-layer (LBL) deposition of poly(sodium-4-styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) was studied in situ by reflectometric interference spectroscopy (RIfS). In particular, the kinetics of polyelectrolyte deposition inside the pores with a diameter of 37 ± 3 nm and a length of 3.7 ± 0.3 μm were unraveled, and potential differences in the LBL multilayer growth compared to flat silicon substrates as well as the effect of different ionic strengths and different types of ions were investigated. RIfS measures the effective optical thicknesses, which is-for a constant pore length-proportional to the effective refractive index of the AAO sample, from which, in turn, the deposited mass of the polymer or the corresponding layer thickness can be estimated. Compared to the multilayer growth by the LBL deposition on the flat aminosilane-primed silicon wafers, which was assessed by spectroscopic ellipsometry, the thickness increment per deposited bilayer, as well as the dependence of this increment on the ionic strength (0.01-0.15) and the counterion type (Na+ vs Ca2+) inside the aminosilane-primed nanopores, was for the first bilayers to within the experimental error identical. For thicker multilayers, the pore diameter became smaller, which led to reduced thickness increments and eventually virtually completely filled the pores. The observed kinetics is consistent with the mass-transport-limited adsorption of the polyelectrolyte to the charged surface according to a Langmuir isotherm with a negligible desorption rate. In addition to fundamental insights into the buildup of polyelectrolyte multilayers inside the AAO nanopores, our results highlight the sensitivity of RIfS and its use as an analytical tool for probing processes inside the nanopores and for the development of biosensors.
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Affiliation(s)
- Imad Zamrik
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
| | - Haider Bayat
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
| | - Qasim Alhusaini
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
| | - Mohammad Raoufi
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, 1416753955Tehran, Iran
| | - Holger Schönherr
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ), University of Siegen, 57076 Siegen, Germany
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33
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Photoelectrocatalytic CO2 reduction to ethanol via graphite-supported and functionalized TiO2 nanowires photocathode. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112368] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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34
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Yan X, Qu H, Chang Y, Pang W, Wang Y, Duan X. Surface Engineering of Metal-Organic Framework Prepared on Film Bulk Acoustic Resonator for Vapor Detection. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10009-10017. [PMID: 31927971 DOI: 10.1021/acsami.9b22407] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Gravimetric resonators based on micro/nanoelectromechanical systems (M/NEMS) are potential candidates in developing smaller, less expensive, and higher-performance gas sensors. Metal-organic frameworks (MOFs) with high surface areas have recently come into focus as advanced nanoporous sensitive materials in microgravimetric gas sensors. The surface of MOFs on those sensors is critical in offering water stability and varying absorption behaviors. However, the influences of the surface on sensing performance are less explored and the strategy to tune surface properties of MOFs mounted on gravimetric resonators is still rare. In this paper, a straightforward strategy to engineer surface properties of MOFs, specifically Cu3(benzenetricarboxylate)2 (known as HKUST-1), is reported and the surface hydrophilicity/hydrophobicity of HKUST-1 is tuned by chemical vapor deposition combined with monolayer self-assembly. It was found that the hybrid inorganic and organic surface engineering strategy not only preserves the absorption capacity of inner MOFs but also significantly enhances the sensor's stability toward water.
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Affiliation(s)
- Xu Yan
- State Key Laboratory of Precision Measuring Technology & Instruments , Tianjin University , Tianjin 300072 , China
- College of Precision Instrument and Opto-electronics Engineering , Tianjin University , Tianjin 300072 , China
| | - Hemi Qu
- State Key Laboratory of Precision Measuring Technology & Instruments , Tianjin University , Tianjin 300072 , China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Nankai University , Tianjin 300071 , China
- College of Precision Instrument and Opto-electronics Engineering , Tianjin University , Tianjin 300072 , China
| | - Ye Chang
- State Key Laboratory of Precision Measuring Technology & Instruments , Tianjin University , Tianjin 300072 , China
- College of Precision Instrument and Opto-electronics Engineering , Tianjin University , Tianjin 300072 , China
| | - Wei Pang
- State Key Laboratory of Precision Measuring Technology & Instruments , Tianjin University , Tianjin 300072 , China
- College of Precision Instrument and Opto-electronics Engineering , Tianjin University , Tianjin 300072 , China
| | - Yanyan Wang
- State Key Laboratory of Precision Measuring Technology & Instruments , Tianjin University , Tianjin 300072 , China
- College of Precision Instrument and Opto-electronics Engineering , Tianjin University , Tianjin 300072 , China
| | - Xuexin Duan
- State Key Laboratory of Precision Measuring Technology & Instruments , Tianjin University , Tianjin 300072 , China
- College of Precision Instrument and Opto-electronics Engineering , Tianjin University , Tianjin 300072 , China
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35
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Nobusawa K, Sabani NB, Takei F, Nakatani K, Yamashita I. Hydrolytically Stable Monolayers Derived from Epoxy Silane. CHEM LETT 2020. [DOI: 10.1246/cl.190700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuyuki Nobusawa
- Graduate School of Engineering, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Norhayati Binti Sabani
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Fumie Takei
- National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan
| | - Kazuhiko Nakatani
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Ichiro Yamashita
- Graduate School of Engineering, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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36
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Miles J, Ko Y, Genzer J. Dependence of deposition method on the molecular structure and stability of organosilanes revealed from degrafting by tetrabutylammonium fluoride. Phys Chem Chem Phys 2020; 22:658-666. [PMID: 31829362 DOI: 10.1039/c9cp05221f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We probe the structure of self-assembled monolayers (SAMs) comprising organosilanes deposited on flat silica-based surfaces prepared by liquid and vapor deposition by removing the organosilane molecules gradually from the underlying substrate via tetrabutylammonium fluoride (TBAF). Removal of organosilanes from the surface involves the cleavage of all pertinent Si-O bonds that anchor the organosilane molecules to the SAM, i.e., direct organosilane-surface linkages and in-plane crosslinks between neighboring organosilanes. We gain insight into the organosilane structure and stability by monitoring the organosilane density as a function of exposure time to TBAF. Degrafting of trifunctional chloro- and methoxy-alkylsilanes deposited from solution yields similar degrafting kinetics. We observe fast degrafting for organosilane SAMs deposited from the vapor phase, indicating that SAMs prepared in this manner form more loosely packed arrays, with less in-plane connectivity, compared to their solution-deposited counterparts. Bulkier, fluorinated silanes form more stable SAMs due to their ability to readily align and form a network with few aggregates and a relatively high fraction of surface bonds. The addition of a polymer brush to an anchored organosilane molecule demonstrates that increased bond tension accelerates the degrafting process despite the increased diffusion resistance.
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Affiliation(s)
- Jason Miles
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695-7905, USA.
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37
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Uttley OF, Brummitt LA, Worrall SD, Edmondson S. Accessible and sustainable Cu(0)-mediated radical polymerisation for the functionalisation of surfaces. Polym Chem 2020. [DOI: 10.1039/d0py00516a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Towards use of environmentally benign solvents and ambient conditions for surface functionalisation by controlled growth of thick cationic polymer brushes.
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Affiliation(s)
- Oliver Frank Uttley
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Leonie Alice Brummitt
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
| | - Stephen David Worrall
- Aston Institute of Materials Research
- School of Engineering and Applied Science
- Aston University
- Birmingham
- UK
| | - Steve Edmondson
- Department of Materials
- School of Natural Sciences
- University of Manchester
- Manchester
- UK
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38
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Yuan X, Wolf N, Mayer D, Offenha Usser A, Wo Rdenweber R. Vapor-Phase Deposition and Electronic Characterization of 3-Aminopropyltriethoxysilane Self-Assembled Monolayers on Silicon Dioxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8183-8190. [PMID: 31144819 DOI: 10.1021/acs.langmuir.8b03832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although organosilanes, especially 3-aminopropyltriethoxysilane (APTES), are commonly used to functionalize oxide substrates for a variety of applications ranging from molecular/biosensors and electronics to protective layers, reliable and controlled deposition of these molecules remains a major obstacle. In this study, we use surface potential analyses to record and optimize the gas-phase deposition of APTES self-assembled monolayers (SAMs) and to determine the resulting change of the electrokinetic potential and charge at the solid?liquid interface when the system is exposed to an electrolyte. Using a gas-phase molecular layer deposition setup with an in situ molecule deposition sensor, APTES is deposited at room temperature onto ozone-activated SiO2. The resulting layers are characterized using various techniques ranging from contact angle analysis, ellipsometry, fluorescence microscopy, X-ray photoelectron spectroscopy, and electrokinetic analysis to AFM. It turns out that adequate postdeposition treatment is crucial to the formation of perfect molecular SAMs. We demonstrate how a thick layer of APTES molecules is initially adsorbed at the surface; however, the molecules do not bind to SiO2 and are removed if the film is exposed to an electrolyte. Only if the film is kept in a gaseous environment (preferable at low pressure) for a long enough time do APTES molecules start to bind to the surface and form the SAM layer. During this time, superfluous molecules are removed. The resulting modification of the electrokinetic potential at the surface is analyzed in detail for different states.
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Affiliation(s)
- Xiaobo Yuan
- Institute of Complex Systems?Bioelectronics (ICS-8) , Forschungszentrum Ju?lich , Ju?lich 52428 , Germany
| | - Nikolaus Wolf
- Institute of Complex Systems?Bioelectronics (ICS-8) , Forschungszentrum Ju?lich , Ju?lich 52428 , Germany
| | - Dirk Mayer
- Institute of Complex Systems?Bioelectronics (ICS-8) , Forschungszentrum Ju?lich , Ju?lich 52428 , Germany
| | - Andreas Offenha Usser
- Institute of Complex Systems?Bioelectronics (ICS-8) , Forschungszentrum Ju?lich , Ju?lich 52428 , Germany
| | - Roger Wo Rdenweber
- Institute of Complex Systems?Bioelectronics (ICS-8) , Forschungszentrum Ju?lich , Ju?lich 52428 , Germany
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39
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Jiang T, Zajforoushan Moghaddam S, Thormann E. PPEGMEMA-based cationic copolymers designed for layer-by-layer assembly. RSC Adv 2019; 9:26915-26926. [PMID: 35528594 PMCID: PMC9070437 DOI: 10.1039/c9ra05464b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 08/22/2019] [Indexed: 02/04/2023] Open
Abstract
We have synthesized three PPEGMEMA-based cationic copolymers with similar amine contents but with systematic variation in the average length of the PEG side chains. The positively charged copolymers were paired with alginate to fabricate layer-by-layer assembled multilayered films. It was demonstrated that the polymeric design, in terms of the systematic variation in the average length of the PEG units, affects the polyelectrolyte multilayer growth mechanism and can be used to tune the structural properties and the water content of the layers. In addition, by partial cross-linking of the amine groups present in the copolymer backbone, disintegration of the film induced by pH changes was prevented. Finally, it was demonstrated how the cross-linked multilayered film can exhibit cationic, zwitterionic and anionic properties depending on the pH value and how these changes are associated with swelling, layer contraction and changes in water content. PPEGMEMA-based cationic copolymers were synthesized and utilized in a layer-by-layer assembly process to prepare a multilayered film. Film properties were tuned with systematic variation in the average length of the PEG side chains.![]()
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Affiliation(s)
- Tao Jiang
- Department of Chemistry
- Technical University of Denmark
- Denmark
| | | | - Esben Thormann
- Department of Chemistry
- Technical University of Denmark
- Denmark
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40
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Gasvoda RJ, Wang S, Hausmann DM, Hudson EA, Agarwal S. Gas Phase Organic Functionalization of SiO 2 with Propanoyl Chloride. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14489-14497. [PMID: 30375874 DOI: 10.1021/acs.langmuir.8b02449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The reaction mechanism of propanoyl chloride (C2H5COCl) with -SiOH-terminated SiO2 films was studied using in situ surface infrared spectroscopy. We show that this surface functionalization reaction is temperature dependent. At 230 °C, C2H5COCl reacts with isolated surface -SiOH groups to form the expected ester linkage. Surprisingly, as the temperature is lowered to 70 °C, the ketone groups are transformed into the enol tautomer, but if the temperature is increased back to the starting exposure temperature of 230 °C, the ketone tautomer is not recovered, indicating that the enol form is thermally stable over a wide range of temperatures. Further, the enol form is directly formed after exposure of a SiO2 surface to C2H5COCl at 70 °C. We speculate that the enol form, which is energetically unfavorable, is stabilized because of hydrogen bonding with adjacent enol groups or through hydrogen bonding with unreacted surface -SiOH groups. The surface coverage of hydrocarbon molecules is calculated as ∼6 × 1012 cm-2, assuming each reacted -SiOH group contributes to one hydrocarbon linkage on the surface. At a substrate temperature of 70 °C, the enol form is unreactive with H2O, and H2O molecules simply physisorb on the surface. At higher temperatures, H2O converts the ketone to the enol tautomer and reacts with Si-O-Si bridges, forming more -SiOH reactive sites. The overall hydrocarbon coverage on the surface can then be further increased through cycling H2O and C2H5COCl doses.
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Affiliation(s)
- Ryan J Gasvoda
- Department of Chemical and Biological Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
| | - Scott Wang
- Lam Research Corporation , 4650 Cushing Parkway , Fremont , California 94538 , United States
| | - Dennis M Hausmann
- Lam Research Corporation , 11155 SW Leveton Drive , Tualatin , Oregon 97062 , United States
| | - Eric A Hudson
- Lam Research Corporation , 4650 Cushing Parkway , Fremont , California 94538 , United States
| | - Sumit Agarwal
- Department of Chemical and Biological Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
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41
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Badv M, Imani SM, Weitz JI, Didar TF. Lubricant-Infused Surfaces with Built-In Functional Biomolecules Exhibit Simultaneous Repellency and Tunable Cell Adhesion. ACS NANO 2018; 12:10890-10902. [PMID: 30352507 DOI: 10.1021/acsnano.8b03938] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Lubricant-infused omniphobic surfaces have exhibited outstanding effectiveness in inhibiting nonspecific adhesion and attenuating superimposed clot formation compared with other coated surfaces. However, such surfaces blindly thwart adhesion, which is troublesome for applications that rely on targeted adhesion. Here we introduce a new class of lubricant-infused surfaces that offer tunable bioactivity together with omniphobic properties by integrating biofunctional domains into the lubricant-infused layer. These novel surfaces promote targeted binding of desired species while simultaneously preventing nonspecific adhesion. To develop these surfaces, mixed self-assembled monolayers (SAMs) of aminosilanes and fluorosilanes were generated. Aminosilanes were utilized as coupling molecules for immobilizing capture ligands, and nonspecific adhesion of cells and proteins was prevented by infiltrating the fluorosilane molecules with a thin layer of a biocompatible fluorocarbon-based lubricant, thus generating biofunctional lubricant-infused surfaces. This method yields surfaces that (a) exhibit highly tunable binding of anti-CD34 and anti-CD144 antibodies and adhesion of endothelial cells, while repelling nonspecific adhesion of undesirable proteins and cells not only in buffer but also in human plasma or human whole blood, and (b) attenuate blood clot formation. Therefore, this straightforward and simple method creates biofunctional, nonsticky surfaces that can be used to optimize the performance of devices such as biomedical implants, extracorporeal circuits, and biosensors.
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Affiliation(s)
- Maryam Badv
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
| | - Sara M Imani
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
| | - Jeffrey I Weitz
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
- Thrombosis & Atherosclerosis Research Institute (TaARI) , Hamilton , Ontario L8S 4L7 , Canada
| | - Tohid F Didar
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
- Department of Mechanical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
- Institute for Infectious Disease Research (IIDR) , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
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42
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Böke F, Labude N, Lauria I, Ernst S, Müller-Newen G, Neuss S, Fischer H. Biological Activation of Bioinert Medical High-Performance Oxide Ceramics by Hydrolytically Stable Immobilization of c(RGDyK) and BMP-2. ACS APPLIED MATERIALS & INTERFACES 2018; 10:38669-38680. [PMID: 30280884 DOI: 10.1021/acsami.8b08900] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
High-performance oxide ceramics (HPOC), such as alumina, zirconia, and dispersion ceramics thereof are successfully used as articulating components in joint arthroplasty. HPOC exhibit excellent wear resistance, high strength, and cytocompatible behavior; however, they lack sufficient tissue bonding capability. Thus, they are primarily deployed as low-wear-bearing articulating components in arthroplasty without direct tissue contact, although proper cellular stimulation would hold significant advantages. Here, we describe a surface modification approach for HPOC, enabling hydrolytically stable interfacial binding of c(RGDyK) peptides and BMP-2 proteins to significantly improve the adhesion and osteogenic differentiation of human mesenchymal stem cells (hMSCs) without altering the mechanical properties of the underlying ceramic substrates. Analyses of cellular attachment of murine fibroblasts (L929), human alveolar basal epithelial cells (A549), hMSCs on c(RGDyK), and osteogenic differentiation of hMSCs on BMP-2-coated interfaces demonstrate significant improvements of cell adhesion and an enhanced osteogenic differentiation potential in vitro. The presented approach provides a strategy for the development of a novel class of bioactive HPOC with osseointegration potential that could lead to novel therapeutic solutions for biomedical applications. Furthermore, the developed surface modification is designed in a way to be readily translated to other medically employed bioinert materials in the future.
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Analysis on the Influence of Component Ratio on Properties of Silica/Montmorillonite Nanocomposites. MATERIALS 2018; 11:ma11112074. [PMID: 30352956 PMCID: PMC6266273 DOI: 10.3390/ma11112074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 10/14/2018] [Accepted: 10/18/2018] [Indexed: 11/25/2022]
Abstract
Silica/montmorillonite (MMT) nanocomposites (SMCs) were prepared by generating SiO2 nanoparticles on an MMT surface using an organic/inorganic hybrid technique with different ratios of tetraethylorthosilicate (TEOS) to MMT (10:1, 20:1 and 40:1). The hydrolysis and polycondensation reactions were controlled by TEOS when it was incorporated into the internal space of the MMT. The delamination and intercalation of the MMT layers were closely related to the TEOS/MMT ratio. The surface chemistry and particulate morphology, thermal properties, pore structure and hygroscopicity of nanocomposites were investigated. The results showed that silica nanoparticles could be intercalated into a layered MMT and induced a high specific surface area (~474 m2·g−1). At a lower ratio (10:1 and 20:1), the dispersed layers could be created from the stack MMT layers and incorporated into a silica matrix, resulting in an increased thermal stability and a decreased pore size. A higher ratio (40:1) caused the intensive self-condensation of the silanol groups, leading to a negative effect on the sol penetration to the MMT. The hydrophilicity of the SMCs increased significantly due to the synergistic effect of the hydroxyl groups and pore structure caused by silica incorporation. A mechanism concerning the effect of component ratio was also proposed for synthesizing this nanocomposite based on the research results. The potential applications of this heterostructured nanocomposites could be summarized as a desiccant, functional fillers, and pollutant disposal.
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Lee M, Palanisamy S, Zhou BH, Wang LY, Chen CY, Lee CY, Yuan SSF, Wang YM. Ultrasensitive Electrical Detection of Follicle-Stimulating Hormone Using a Functionalized Silicon Nanowire Transistor Chemosensor. ACS APPLIED MATERIALS & INTERFACES 2018; 10:36120-36127. [PMID: 30256613 DOI: 10.1021/acsami.8b11882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The follicle-stimulating hormone (FSH) is a hormone that belongs to a family of glycoprotein hormones. Determination of FSH can help in interpreting various factors that include physiology of the reproductive system, fertility maintenance, and identification or treatment of reproductive disorders. Sialic acids are derivatives of neuraminic acids with negative charges, present at the end of the sugar chains and further linked to the cell surfaces and glycoproteins. The direct measurement of FSH in a human body can be recorded by developing a sensor probe that responds particularly to sialic acids over the other hormones. However, existing diagnostic methods still suffer from many difficulties in terms of complicated handling techniques, expensive instrumentation, etc. Development of accurate, rapid, and low-cost FSH detection chemosensors is important to meet these demands. Herein, we utilized a novel sensing method for accurate and fast FSH detection using a metal-oxide semiconductor silicon nanowire field effect transistor (SiNW-FET) device. This is the first report to demonstrate the boronic acid-functionalized SiNW-FET device in FSH detection. FSH detection has been successfully determined using an assay buffer solution with 0.72 fM detection limit as well as using 20% serum with 1.1. fM detection limit. We also investigated the specificity with other gonadotropins/glycosylated serum proteins. The current measurements on FSH concentrations at different time intervals were also studied. The sensitive, cheap, and miniaturized SiNW-FET device can serve as an effective sensing approach for rapid screening of FSH and menopause diagnosis.
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Affiliation(s)
- Mucian Lee
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B) , National Chiao Tung University , 75 Bo-Ai Street , Hsinchu 300 , Taiwan
| | - Sathyadevi Palanisamy
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B) , National Chiao Tung University , 75 Bo-Ai Street , Hsinchu 300 , Taiwan
| | - Bin-Hou Zhou
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B) , National Chiao Tung University , 75 Bo-Ai Street , Hsinchu 300 , Taiwan
| | - Li-Yu Wang
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B) , National Chiao Tung University , 75 Bo-Ai Street , Hsinchu 300 , Taiwan
| | - Chiao-Yun Chen
- Department of Medical Imaging , Kaohsiung Medical University Hospital , Kaohsiung 807 , Taiwan
| | - Chen-Yi Lee
- Department of Electronics Engineering , National Chiao Tung University , Hsinchu 300 , Taiwan
| | | | - Yun-Ming Wang
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B) , National Chiao Tung University , 75 Bo-Ai Street , Hsinchu 300 , Taiwan
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Khuat TTH, Liang L, Phan TT, Mizutani G, Rutt HN. Sum frequency generation study of immobilized 3-aminopropyltriethoxysilane self-assembled layer on Si(111) substrates. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Thi Thu Hien Khuat
- Applied Physics Department; Japan Advanced Institute of Science and Technology; Nomi Japan
| | - Lin Liang
- Applied Physics Department; Japan Advanced Institute of Science and Technology; Nomi Japan
| | - Trong Tue Phan
- Applied Physics Department; Japan Advanced Institute of Science and Technology; Nomi Japan
| | - Goro Mizutani
- Applied Physics Department; Japan Advanced Institute of Science and Technology; Nomi Japan
| | - Harvey N. Rutt
- School of Electronic and Computer Science; University of Southampton; Southampton UK
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Saini G, Trenchevska O, Howell LJ, Boyd JG, Smith DP, Jain V, Linford MR. Performance Comparison of Three Chemical Vapor Deposited Aminosilanes in Peptide Synthesis: Effects of Silane on Peptide Stability and Purity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11925-11932. [PMID: 30208711 DOI: 10.1021/acs.langmuir.8b01298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Silicon oxide substrates underwent gas-phase functionalization with various aminosilanes, and the resulting surfaces were evaluated for their suitability as a solid support for solid phase peptide synthesis (SPPS). APTES (3-aminopropyltriethoxysilane), APDEMS (3-aminopropyldiethoxymethylsilane), and APDIPES (3-aminopropyldiisopropylethoxysilane) were individually applied to thermal oxide-terminated silicon substrates via gas-phase deposition. Coated surfaces were characterized by spectroscopic ellipsometry (SE), contact angle goniometry, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and spectrophotometry. Model oligopeptides with 16 residues were synthesized on the amino surfaces, and the chemical stabilities of the resulting surfaces were evaluated against a stringent side chain deprotection (SCD) step, which contained trifluoroacetic acid (TFA) and trifluoromethanesulfonic acid (TFMSA). Functionalized surface thickness loss during SCD was most acute for APDIPES and the observed relative stability order was APTES > APDEMS > APDIPES. Amino surfaces were evaluated for compatibility with stepwise peptide synthesis where complete deprotection and coupling cycles are paramount. Model trimer syntheses indicated that routine capping of unreacted amines with acetic anhydride significantly increased purity as measured by MALDI-MS. An inverse correlation between the amine loading density and peptide purity was observed. In general, peptide purity was highest for the lowest amine density APDIPES surface.
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Affiliation(s)
- Gaurav Saini
- HealthTell Inc. , Chandler , Arizona 85226 , United States
| | | | - Loren J Howell
- HealthTell Inc. , Chandler , Arizona 85226 , United States
| | - James G Boyd
- HealthTell Inc. , Chandler , Arizona 85226 , United States
| | - David P Smith
- HealthTell Inc. , Chandler , Arizona 85226 , United States
| | - Varun Jain
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
| | - Matthew R Linford
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
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Marcuello C, Foulon L, Chabbert B, Molinari M, Aguié-Béghin V. Langmuir-Blodgett Procedure to Precisely Control the Coverage of Functionalized AFM Cantilevers for SMFS Measurements: Application with Cellulose Nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9376-9386. [PMID: 30037232 DOI: 10.1021/acs.langmuir.8b01892] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Atomic force microscopy (AFM) experiments with functionalized tips are currently one of the most powerful tools to locally measure adhesion forces via single-molecule force spectroscopy (SMFS) measurements. The main difficulty is to precisely control the attachment of biomolecules to the cantilever. Different chemistry procedures have been developed including the use of spacer molecules. Even if a process works well for small biomolecules such as antibodies, issues remain regarding nanoparticles or larger objects such as cellulose nanocrystals because it is difficult to precisely control their coverage and homogeneity. In this work, an original procedure based on the Langmuir-Blodgett (LB) technique was implemented for lever functionalization with cellulose nanocrystals and compared with classical chemical strategies. LB shows to be almost 6.0-fold more efficient than chemical procedure in terms of cellulose nanocrystals coverage attachment. Moreover, the LB technology provides advantage of not requiring linker molecules, which could have detrimental effects such as overestimation of the interaction force. The structural characterization and SMFS measurements of lignocellulosic polymers show that this strategy enables the precise control of the lever coverage, which improves the accuracy of the adhesion measurements. Such methodology is expected to strongly impact the AFM tip/tipless functionalization and SMFS measurements in different fields.
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Affiliation(s)
- Carlos Marcuello
- FARE Laboratory , INRA, Université de Reims Champagne-Ardenne , 51100 , Reims , France
- Laboratoire de Recherche en Nanosciences LRN EA4682 , Université de Reims Champagne-Ardenne , 51100 , Reims , France
| | - Laurence Foulon
- FARE Laboratory , INRA, Université de Reims Champagne-Ardenne , 51100 , Reims , France
| | - Brigitte Chabbert
- FARE Laboratory , INRA, Université de Reims Champagne-Ardenne , 51100 , Reims , France
| | - Michael Molinari
- Laboratoire de Recherche en Nanosciences LRN EA4682 , Université de Reims Champagne-Ardenne , 51100 , Reims , France
- CBMN, CNRS UMR 5248, IPB, Université de Bordeaux, 33607 , Pessac , France
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Modulating receptor-ligand binding in biorecognition by setting surface wettability. Anal Bioanal Chem 2018; 410:5723-5730. [DOI: 10.1007/s00216-018-1247-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/22/2018] [Accepted: 07/05/2018] [Indexed: 01/30/2023]
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Hassibi A, Manickam A, Singh R, Bolouki S, Sinha R, Jirage KB, McDermott MW, Hassibi B, Vikalo H, Mazarei G, Pei L, Bousse L, Miller M, Heshami M, Savage MP, Taylor MT, Gamini N, Wood N, Mantina P, Grogan P, Kuimelis P, Savalia P, Conradson S, Li Y, Meyer RB, Ku E, Ebert J, Pinsky BA, Dolganov G, Van T, Johnson KA, Naraghi-Arani P, Kuimelis RG, Schoolnik G. Multiplexed identification, quantification and genotyping of infectious agents using a semiconductor biochip. Nat Biotechnol 2018; 36:738-745. [PMID: 30010676 DOI: 10.1038/nbt.4179] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/23/2018] [Indexed: 02/04/2023]
Abstract
The emergence of pathogens resistant to existing antimicrobial drugs is a growing worldwide health crisis that threatens a return to the pre-antibiotic era. To decrease the overuse of antibiotics, molecular diagnostics systems are needed that can rapidly identify pathogens in a clinical sample and determine the presence of mutations that confer drug resistance at the point of care. We developed a fully integrated, miniaturized semiconductor biochip and closed-tube detection chemistry that performs multiplex nucleic acid amplification and sequence analysis. The approach had a high dynamic range of quantification of microbial load and was able to perform comprehensive mutation analysis on up to 1,000 sequences or strands simultaneously in <2 h. We detected and quantified multiple DNA and RNA respiratory viruses in clinical samples with complete concordance to a commercially available test. We also identified 54 drug-resistance-associated mutations that were present in six genes of Mycobacterium tuberculosis, all of which were confirmed by next-generation sequencing.
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Affiliation(s)
| | | | | | | | - Ruma Sinha
- InSilixa, Inc., Sunnyvale, California, USA
| | | | | | - Babak Hassibi
- Electrical Engineering Department, California Institute of Technology, Pasadena, California, USA
| | - Haris Vikalo
- Electrical and Computer Engineering Department, University of Texas at Austin, Austin, Texas, USA
| | | | - Lei Pei
- InSilixa, Inc., Sunnyvale, California, USA
| | - Luc Bousse
- InSilixa, Inc., Sunnyvale, California, USA
| | | | | | | | | | | | | | | | | | | | | | | | - Yuan Li
- InSilixa, Inc., Sunnyvale, California, USA
| | | | - Edmond Ku
- InSilixa, Inc., Sunnyvale, California, USA
| | | | - Benjamin A Pinsky
- Department of Medicine, Stanford University, Stanford, California, USA
| | | | - Tran Van
- InSilixa, Inc., Sunnyvale, California, USA
| | | | | | | | - Gary Schoolnik
- InSilixa, Inc., Sunnyvale, California, USA.,Department of Medicine, Stanford University, Stanford, California, USA
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Sims RA, Harmer-Bassell SL, Quinton JS. The oscillatory adsorption of self-assembled organosilane films on aluminium oxide surfaces. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6483] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. A. Sims
- Flinders Institute for NanoScale Science and Nanotechnology, College of Science and Engineering; Flinders University; GPO Box 2100 Adelaide SA 5001 Australia
| | - S. L. Harmer-Bassell
- Flinders Institute for NanoScale Science and Nanotechnology, College of Science and Engineering; Flinders University; GPO Box 2100 Adelaide SA 5001 Australia
| | - J. S. Quinton
- Flinders Institute for NanoScale Science and Nanotechnology, College of Science and Engineering; Flinders University; GPO Box 2100 Adelaide SA 5001 Australia
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