1
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Zhurenkov KE, Akbarinejad A, Porritt H, Horrocks MS, Malmström J. Colloidal Probe Technique Optimization for Determination of Young's Modulus of Soft Adhesive Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39023221 DOI: 10.1021/acs.langmuir.4c01047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Atomic force microscopy (AFM) is a valuable tool for determining the Young's modulus of a wide range of materials. However, it faces challenges, particularly when assessing adhesive materials like soft poly(N-isopropylacrylamide) (pNIPAM) hydrogels. This study focuses on enhancing the consistency and reliability of AFM measurements by functionally modifying AFM spherical tip cantilevers to address substrate adhesion issues with these hydrogels. Specifically, hydrophobic functionalization with 1H,1H,2H,2H-perfluorooctyltrichlorosilane (PFOCTS) emerged as the most effective approach, yielding consistent and reliable Young's modulus data across various pNIPAM hydrogel samples. This work highlights the importance of optimizing data acquisition in AFM, rather than relying on postprocessing, to reduce inconsistencies in Young's modulus assessment.
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Affiliation(s)
- Kirill E Zhurenkov
- Department of Chemical and Materials Engineering, The University of Auckland, 1010 Auckland, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, 6140 Wellington, New Zealand
| | - Alireza Akbarinejad
- Department of Chemical and Materials Engineering, The University of Auckland, 1010 Auckland, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, 6140 Wellington, New Zealand
| | - Harrison Porritt
- Department of Chemical and Materials Engineering, The University of Auckland, 1010 Auckland, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, 6140 Wellington, New Zealand
| | - Matthew S Horrocks
- Department of Chemical and Materials Engineering, The University of Auckland, 1010 Auckland, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, 6140 Wellington, New Zealand
| | - Jenny Malmström
- Department of Chemical and Materials Engineering, The University of Auckland, 1010 Auckland, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, 6140 Wellington, New Zealand
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2
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Raffaelle P, Wang GT, Shestopalov AA. Vapor-Phase Halogenation of Hydrogen-Terminated Silicon(100) Using N-Halogen-succinimides. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55139-55149. [PMID: 37965814 PMCID: PMC10694808 DOI: 10.1021/acsami.3c13269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/26/2023] [Accepted: 10/30/2023] [Indexed: 11/16/2023]
Abstract
The focus of this study was to demonstrate the vapor-phase halogenation of Si(100) and subsequently evaluate the inhibiting ability of the halogenated surfaces toward atomic layer deposition (ALD) of aluminum oxide (Al2O3). Hydrogen-terminated silicon ⟨100⟩ (H-Si(100)) was halogenated using N-chlorosuccinimide (NCS), N-bromosuccinimide (NBS), and N-iodosuccinimide (NIS) in a vacuum-based chemical process. The composition and physical properties of the prepared monolayers were analyzed by using X-ray photoelectron spectroscopy (XPS) and contact angle (CA) goniometry. These measurements confirmed that all three reagents were more effective in halogenating H-Si(100) over OH-Si(100) in the vapor phase. The stability of the modified surfaces in air was also tested, with the chlorinated surface showing the greatest resistance to monolayer degradation and silicon oxide (SiO2) generation within the first 24 h of exposure to air. XPS and atomic force microscopy (AFM) measurements showed that the succinimide-derived Hal-Si(100) surfaces exhibited blocking ability superior to that of H-Si(100), a commonly used ALD resist. This halogenation method provides a dry chemistry alternative for creating halogen-based ALD resists on Si(100) in near-ambient environments.
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Affiliation(s)
- Patrick
R. Raffaelle
- Department
of Chemical Engineering, Hajim School of Engineering and Applied Sciences, University of Rochester, Rochester, New York 14627, United States
| | - George T. Wang
- Sandia
National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Alexander A. Shestopalov
- Department
of Chemical Engineering, Hajim School of Engineering and Applied Sciences, University of Rochester, Rochester, New York 14627, United States
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3
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Zhang ZQ, Ren KF, Ji J. Silane coupling agent in biomedical materials. Biointerphases 2023; 18:030801. [PMID: 37382394 DOI: 10.1116/6.0002712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/24/2023] [Indexed: 06/30/2023] Open
Abstract
Medical devices are becoming more and more significant in our daily life. For implantable medical devices, good biocompatibility is required for further use in vivo. Thus, surface modification of medical devices is really important, which gives a wide application scene for a silane coupling agent. The silane coupling agent is able to form a durable bond between organic and inorganic materials. The dehydration process provides linking sites to achieve condensation of two hydroxyl groups. The forming covalent bond brings excellent mechanical properties among different surfaces. Indeed, the silane coupling agent is a popular component in surface modification. Metals, proteins, and hydrogels are using silane coupling agent to link parts commonly. The mild reaction environment also brings advantages for the spread of the silane coupling agent. In this review, we summarize two main methods of using the silane coupling agent. One is acting as a crosslinker mixed in the whole system, and the other is to provide a bridge between different surfaces. Moreover, we introduce their applications in biomedical devices.
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Affiliation(s)
- Ze-Qun Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
| | - Ke-Feng Ren
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Polymeric Materials Design and Synthesis for Biomedical Function, Soochow University, Suzhou 215123, China
| | - Jian Ji
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
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4
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Zhu Y, Wei Q, Jin Q, Li G, Zhang Q, Xiao H, Li T, Wei F, Luo Y. Polyethylene Glycol Functionalized Silicon Nanowire Field-Effect Transistor Biosensor for Glucose Detection. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:604. [PMID: 36770565 PMCID: PMC9919870 DOI: 10.3390/nano13030604] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/19/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Accurate monitoring of blood glucose levels is crucial for the diagnosis of diabetes patients. In this paper, we proposed a simple "mixed-catalyzer layer" modified silicon nanowire field-effect transistor biosensor that enabled direct detection of glucose with low-charge in high ionic strength solutions. A stable screening system was established to overcome Debye screening effect by forming a porous biopolymer layer with polyethylene glycol (PEG) modified on the surface of SiNW. The experimental results show that when the optimal ratio (APTMS:silane-PEG = 2:1) modified the surface of silicon nanowires, glucose oxidase can detect glucose in the concentration range of 10 nM to 10 mM. The sensitivity of the biosensor is calculated to be 0.47 μAcm-2mM-1, its fast response time not exceeding 8 s, and the detection limit is up to 10 nM. This glucose sensor has the advantages of high sensitivity, strong specificity and fast real-time response. Therefore, it has a potential clinical application prospect in disease diagnosis.
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Affiliation(s)
- Yan Zhu
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
- State Key Laboratory of Advanced Materials for Smart Sensing, GRINM Group Co., Ltd., Beijing 100088, China
| | - Qianhui Wei
- State Key Laboratory of Advanced Materials for Smart Sensing, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
- GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan 528051, China
| | - Qingxi Jin
- State Key Laboratory of Advanced Materials for Smart Sensing, GRINM Group Co., Ltd., Beijing 100088, China
- GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
| | - Gangrong Li
- GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan 528051, China
| | - Qingzhu Zhang
- Advanced Integrated Circuits R&D Center, Institute of Microelectronic of the Chinese Academy of Sciences, Beijing 100029, China
| | - Han Xiao
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Tengfei Li
- GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan 528051, China
| | - Feng Wei
- State Key Laboratory of Advanced Materials for Smart Sensing, GRINM Group Co., Ltd., Beijing 100088, China
- GRINM (Guangdong) Institute for Advanced Materials and Technology, Foshan 528051, China
| | - Yingchun Luo
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
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Ge Y, Wang W, Li K, Xiao F, Yu Z, Gong J, Jin H, Li A. Anti-Oil-Adhesion Property of Superhydrophilic/Underwater Superoleophobic Phytic Acid-Fe III Complex Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:411-422. [PMID: 36534012 DOI: 10.1021/acs.langmuir.2c02619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Crude oil adhesion issues are widespread in the petroleum industry, leading to inefficient production and high maintenance costs. Developing efficient antifouling materials and investigating the microscopic adhesion mechanism are of substantial significance. In the present work, a superhydrophilic/underwater superoleophobic PAFC coating with excellent antifouling properties was constructed by the coordination-driven self-assembly of phytic acid (PA) and FeCl3 (FC). The atomic force microscope (AFM) droplet probe technique was employed to elucidate the underlying mechanism of the anti-oil-adhesion property of the PAFC coating. Results showed that the PAFC modification achieved the optimum effect at a molar ratio of 1:3 between PA and FeIII. Applying a (3-aminopropyl)triethoxysilane (APTES) interlayer can effectively improve the performance of the PAFC coating on silica substrates. AFM droplet probe experiments indicated that the adhesion force between submerged micrometer-sized oil droplets and PAFC-modified substrates was significantly weaker than that with the untreated substrate. Meanwhile, the adhesion forces between oil droplets and surfaces were inversely proportional to the contact angle of the oil in water and were enhanced by higher salinity, lower collision velocity, and stronger loading force. The oil injection and wall sticking tests also confirmed the effectiveness of the PAFC modification in resisting the adhesion of crude oil.
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Affiliation(s)
- Yuntong Ge
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
| | - Wei Wang
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
| | - Kai Li
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
| | - Fan Xiao
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
| | - Zhipeng Yu
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
| | - Jing Gong
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
| | - Hang Jin
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
- Tianjin Research Institute for Water Transport Engineering, Key Laboratory of Environmental Protection Technology on Water Transport, Ministry of Transport, Tianjin300456, P. R. China
| | - Ang Li
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, Beijing102249, P. R. China
- China Huanqiu Contracting & Engineering Co., Ltd., Beijing100028, P. R. China
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6
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Verma M, Dar AI, Acharya A. Facile synthesis of biogenic silica nanomaterial loaded transparent tragacanth gum hydrogels with improved physicochemical properties and inherent anti-bacterial activity. NANOSCALE 2022; 14:11635-11654. [PMID: 35904404 DOI: 10.1039/d2nr02051c] [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
In this report, biogenic, crystalline (∼60.5 ± 2%) bowknot structured silica nanoparticles (BSNPs) of length ∼ 274 ± 7 nm and width ∼ 36 ± 2 nm were isolated from invasive species viz. Lantana camara. These were then chemically modified using nitrogen containing moieties viz. APTES and CTAB. These modified BSNPs were then used as electrostatic cross-linking agents for the formation of tragacanth gum (TG) hydrogels. The cytocompatible CTAB@BSNP-TG hydrogels documented ∼10-12 fold enhancement in anti-bacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa when compared with TG hydrogels. Disruption of the bacterial membrane by ROS generation and protein leakage were responsible for anti-bacterial activity. A cell migration assay suggested that CTAB@BSNP-TG augmented the cell proliferation of NIH-3T3 cells compared to other TG hydrogels. The present study will pave the path for the development of organic-inorganic hybrid nanocomposite-based hydrogels for anti-bacterial and cell migration applications.
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Affiliation(s)
- Mohini Verma
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, H.P., 176061, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Aqib Iqbal Dar
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, H.P., 176061, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Amitabha Acharya
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, H.P., 176061, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India
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7
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Khoury C, Holton S, Shpasser D, Hallo E, Kulkarni A, Jentoft FC, Gazit OM. Elucidating Cooperative Interactions between Grafted Amines and Tin or Titanium Sites on Silica. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christine Khoury
- Wolfson Faculty of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel
| | - Samuel Holton
- Department of Chemical Engineering, University of California Davis, Davis, California 95618, United States
| | - Dina Shpasser
- Wolfson Faculty of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel
| | - Elior Hallo
- Wolfson Faculty of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel
| | - Ambarish Kulkarni
- Department of Chemical Engineering, University of California Davis, Davis, California 95618, United States
| | - Friederike C. Jentoft
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303, United States
| | - Oz M. Gazit
- Wolfson Faculty of Chemical Engineering, Technion−Israel Institute of Technology, Haifa 3200003, Israel
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8
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Reese CJ, Qi Y, Abele DT, Shlafstein MD, Dickhudt RJ, Guan X, Wagner MJ, Liu X, Boyes SG. Aromatic Polyamide Brushes for High Young’s Modulus Surfaces by Surface-Initiated Chain-Growth Condensation Polymerization. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Caleb J. Reese
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Yarong Qi
- Department of Civil & Environmental Engineering, The George Washington University, Washington, District of Columbia 20052, United States
| | - Dustin T. Abele
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Maximillian D. Shlafstein
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Rhys J. Dickhudt
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Xun Guan
- Department of Civil & Environmental Engineering, The George Washington University, Washington, District of Columbia 20052, United States
| | - Michael J. Wagner
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Xitong Liu
- Department of Civil & Environmental Engineering, The George Washington University, Washington, District of Columbia 20052, United States
| | - Stephen G. Boyes
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
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9
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Amadi EV, Venkataraman A, Papadopoulos C. Nanoscale self-assembly: concepts, applications and challenges. NANOTECHNOLOGY 2022; 33. [PMID: 34874297 DOI: 10.1088/1361-6528/ac3f54] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 12/02/2021] [Indexed: 05/09/2023]
Abstract
Self-assembly offers unique possibilities for fabricating nanostructures, with different morphologies and properties, typically from vapour or liquid phase precursors. Molecular units, nanoparticles, biological molecules and other discrete elements can spontaneously organise or form via interactions at the nanoscale. Currently, nanoscale self-assembly finds applications in a wide variety of areas including carbon nanomaterials and semiconductor nanowires, semiconductor heterojunctions and superlattices, the deposition of quantum dots, drug delivery, such as mRNA-based vaccines, and modern integrated circuits and nanoelectronics, to name a few. Recent advancements in drug delivery, silicon nanoelectronics, lasers and nanotechnology in general, owing to nanoscale self-assembly, coupled with its versatility, simplicity and scalability, have highlighted its importance and potential for fabricating more complex nanostructures with advanced functionalities in the future. This review aims to provide readers with concise information about the basic concepts of nanoscale self-assembly, its applications to date, and future outlook. First, an overview of various self-assembly techniques such as vapour deposition, colloidal growth, molecular self-assembly and directed self-assembly/hybrid approaches are discussed. Applications in diverse fields involving specific examples of nanoscale self-assembly then highlight the state of the art and finally, the future outlook for nanoscale self-assembly and potential for more complex nanomaterial assemblies in the future as technological functionality increases.
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Affiliation(s)
- Eberechukwu Victoria Amadi
- University of Victoria, Department of Electrical and Computer Engineering, PO BOX 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Anusha Venkataraman
- University of Victoria, Department of Electrical and Computer Engineering, PO BOX 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Chris Papadopoulos
- University of Victoria, Department of Electrical and Computer Engineering, PO BOX 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
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10
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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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11
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Vandenbroucke SST, Nisula M, Petit R, Vos R, Jans K, Vereecken PM, Dendooven J, Detavernier C. An IR Spectroscopy Study of the Degradation of Surface Bound Azido-Groups in High Vacuum. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:12608-12615. [PMID: 34669405 DOI: 10.1021/acs.langmuir.1c01903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Controlled surface functionalization with azides to perform on surface "click chemistry" is desired for a large range of fields such as material engineering and biosensors. In this work, the stability of an azido-containing self-assembled monolayer in high vacuum is investigated using in situ Fourier transform infrared spectroscopy. The intensity of the antisymmetric azide stretching vibration is found to decrease over time, suggesting the degradation of the azido-group in high vacuum. The degradation is further investigated at three different temperatures and at seven different nitrogen pressures ranging from 1 × 10-6 mbar to 5 × 10-3 mbar. The degradation is found to increase at higher temperatures and at lower nitrogen pressures. The latter supporting the theory that the degradation reaction involves the decomposition into molecular nitrogen. For the condition with the highest degradation detected, only 63% of azides is found to remain at the surface after 8 h in vacuum. The findings show a significant loss in control of the surface functionalization. The instability of azides in high vacuum should therefore always be considered when depositing or postprocessing azido-containing layers.
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Affiliation(s)
- Sofie S T Vandenbroucke
- Department of Solid State Sciences, CoCooN group, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
- Interuniversity Micro Electronics Center (IMEC), Kapeldreef 75, B-3001 Leuven, Belgium
| | - Mikko Nisula
- Department of Solid State Sciences, CoCooN group, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
| | - Robin Petit
- Department of Solid State Sciences, CoCooN group, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
| | - Rita Vos
- Interuniversity Micro Electronics Center (IMEC), Kapeldreef 75, B-3001 Leuven, Belgium
| | - Karolien Jans
- Interuniversity Micro Electronics Center (IMEC), Kapeldreef 75, B-3001 Leuven, Belgium
| | - Philippe M Vereecken
- Interuniversity Micro Electronics Center (IMEC), Kapeldreef 75, B-3001 Leuven, Belgium
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Jolien Dendooven
- Department of Solid State Sciences, CoCooN group, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
| | - Christophe Detavernier
- Department of Solid State Sciences, CoCooN group, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
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12
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Tsuei M, Tran H, Roh S, Ober CK, Abbott NL. Using Liquid Crystals to Probe the Organization of Helical Polypeptide Brushes Induced by Solvent Pretreatment. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Tsuei
- Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Hai Tran
- Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Sangchul Roh
- Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Christopher K. Ober
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Nicholas L. Abbott
- Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
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13
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Ünügül T, Karaağaç B. Vulcanization of chlorinated polyethylene / chloroprene rubber compounds at lower temperatures in the presence of reactive silanes. J Appl Polym Sci 2021. [DOI: 10.1002/app.50544] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Tuba Ünügül
- Department of Chemical Engineering Kocaeli University, Umuttepe Campus Kocaeli Turkey
| | - Bağdagül Karaağaç
- Department of Chemical Engineering Kocaeli University, Umuttepe Campus Kocaeli Turkey
- Department of Polymer Science & Technology Kocaeli University, Umuttepe Campus Kocaeli Turkey
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14
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Nyga A, Czerwińska-Główka D, Krzywiecki M, Przystaś W, Zabłocka-Godlewska E, Student S, Kwoka M, Data P, Blacha-Grzechnik A. Covalent Immobilization of Organic Photosensitizers on the Glass Surface: Toward the Formation of the Light-Activated Antimicrobial Nanocoating. MATERIALS 2021; 14:ma14113093. [PMID: 34200077 PMCID: PMC8201308 DOI: 10.3390/ma14113093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 11/17/2022]
Abstract
Two highly efficient commercial organic photosensitizers—azure A (AA) and 5-(4-aminophenyl)-10,15,20-(triphenyl)porphyrin (APTPP)—were covalently attached to the glass surface to form a photoactive monolayer. The proposed straightforward strategy consists of three steps, i.e., the initial chemical grafting of 3-aminopropyltriethoxysilane (APTES) followed by two chemical postmodification steps. The chemical structure of the resulting mixed monolayer (MIX_TC_APTES@glass) was widely characterized by X-ray photoelectron (XPS) and Raman spectroscopies, while its photoactive properties were investigated in situ by UV–Vis spectroscopy with α-terpinene as a chemical trap. It was shown that both photosensitizers retain their activity toward light-activated generation of reactive oxygen species (ROS) after immobilization on the glassy surface and that the resulting nanolayer shows high stability. Thanks to the complementarity of the spectral properties of AA and APTPP, the effectiveness of the ROS photogeneration under broadband illumination can be optimized. The reported light-activated nanocoating demonstrated promising antimicrobial activity toward Escherichia coli (E. coli), by reducing the number of adhered bacteria compared to the unmodified glass surface.
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Affiliation(s)
- Aleksandra Nyga
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland; (A.N.); (D.C.-G.); (P.D.)
| | - Dominika Czerwińska-Główka
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland; (A.N.); (D.C.-G.); (P.D.)
| | - Maciej Krzywiecki
- Center for Science and Education (CSE), Institute of Physics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland;
| | - Wioletta Przystaś
- Faculty of Energy and Environmental Engineering, Silesian University of Technology, 44-100 Gliwice, Poland; (W.P.); (E.Z.-G.)
- Biotechnology Centre, Silesian University of Technology, 44-100 Gliwice, Poland;
| | - Ewa Zabłocka-Godlewska
- Faculty of Energy and Environmental Engineering, Silesian University of Technology, 44-100 Gliwice, Poland; (W.P.); (E.Z.-G.)
- Biotechnology Centre, Silesian University of Technology, 44-100 Gliwice, Poland;
| | - Sebastian Student
- Biotechnology Centre, Silesian University of Technology, 44-100 Gliwice, Poland;
- Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, 44-100 Gliwice, Poland;
| | - Monika Kwoka
- Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, 44-100 Gliwice, Poland;
- Institute of Electronics, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland
| | - Przemysław Data
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland; (A.N.); (D.C.-G.); (P.D.)
| | - Agata Blacha-Grzechnik
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland; (A.N.); (D.C.-G.); (P.D.)
- Correspondence: ; Tel.: +48-322371024
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15
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Ishizaki Y, Yamamoto S, Miyashita T, Mitsuishi M. pH-Responsive Ultrathin Nanoporous SiO 2 Films for Selective Ion Permeation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5627-5634. [PMID: 33900779 DOI: 10.1021/acs.langmuir.1c00486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Ultrathin nanoporous (NP) films are an emerging field for selective and effective ion/molecular separation and electrochemical sensing applications. We describe selective ion permeation in surface-functionalized ultrathin NP SiO2 films (NP SiO2-NH2). The ultrathin NP SiO2 films with ca. 8 nm thickness were prepared from silsesquioxane-containing blend polymer Langmuir-Blodgett films (nanosheets) using the photo-oxidation method. The porous SiO2 surface was modified with a pH-responsive amine-containing silane coupling agent. Selective ion permeation was demonstrated under acidic pH conditions (pH ≤ 6) using two equally sized redox probes: negative (Fe(CN)63-/4-) and positive (Ru(NH3)62+/3+) ions. The current density for Fe(CN)63-/4- decreased as the pH value increased to pH = 6, whereas it increased for Ru(NH3)62+/3+. Control measurements revealed that the probes can penetrate the pores of nonfunctionalized SiO2 films irrespective of pH values, indicating that both the size and the surface charge response contributed to selective ion permeation. Results obtained from this study pave the way for new applications in molecular separation and sensing applications based on ultrathin nanoporous films (<10 nm) and tailored surfaces.
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Affiliation(s)
- Yuya Ishizaki
- Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Shunsuke Yamamoto
- Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Tokuji Miyashita
- Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Masaya Mitsuishi
- Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan
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16
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New methods in polymer brush synthesis: Non-vinyl-based semiflexible and rigid-rod polymer brushes. Prog Polym Sci 2021. [DOI: 10.1016/j.progpolymsci.2021.101361] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Elmas S, Skipper K, Salehifar N, Jamieson T, Andersson GG, Nydén M, Leterme SC, Andersson MR. Cyclic Copper Uptake and Release from Natural Seawater-A Fully Sustainable Antifouling Technique to Prevent Marine Growth. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:757-766. [PMID: 33337864 DOI: 10.1021/acs.est.0c06231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Unwanted growth of fouling organisms on underwater surfaces is an omnipresent challenge for the marine industry, costing billions of dollars every year in the transportation sector alone. Copper, the most widely used biocide in antifouling paints, is at the brink of a total ban in being used in antifouling coatings, as it has become an existential threat to nontargeted species due to anthropogenic copper inputs into protected waters. In the current study, using a porous and cross-linked poly(ethylene imine) structure under marine and fouling environments, available copper from natural seawater was absorbed and electrochemically released back as a potent biocide at 1.3 V vs Ag|AgCl, reducing marine growth by 94% compared to the control electrode (coupon) at 0 V. The coating can also function as an electrochemical copper sensor enabling real-time monitoring of the electrochemical uptake and release of copper ions from natural seawater. This allows tailoring of the electrochemical program to the changing marine environments, i.e., when the vessels move from high-copper-contaminated waters to coastal regions with low concentrations of copper.
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Affiliation(s)
- Sait Elmas
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
| | - Karuna Skipper
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
| | - Nahideh Salehifar
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
- MEMS&NEMS Laboratory, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran
| | - Tamar Jamieson
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
| | - Gunther G Andersson
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
| | - Magnus Nydén
- Faculty of Science and Engineering, Macquarie University, 7 Wally's Walk, Macquarie Park, NSW 2109, Australia
| | - Sophie C Leterme
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
| | - Mats R Andersson
- Flinders Institute for NanoScale Science & Technology, College of Science & Engineering, Flinders University, Sturt Road, Bedford Park, SA 5042, Australia
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18
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Scherr J, Tang Z, Küllmer M, Balser S, Scholz AS, Winter A, Parey K, Rittner A, Grininger M, Zickermann V, Rhinow D, Terfort A, Turchanin A. Smart Molecular Nanosheets for Advanced Preparation of Biological Samples in Electron Cryo-Microscopy. ACS NANO 2020; 14:9972-9978. [PMID: 32589396 DOI: 10.1021/acsnano.0c03052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transmission electron cryo-microscopy (cryoEM) of vitrified biological specimens is a powerful tool for structural biology. Current preparation of vitrified biological samples starts off with sample isolation and purification, followed by the fixation in a freestanding layer of amorphous ice. Here, we demonstrate that ultrathin (∼10 nm) smart molecular nanosheets having specific biorecognition sites embedded in a biorepulsive layer covalently bound to a mechanically stable carbon nanomembrane allow for a much simpler isolation and structural analysis. We characterize in detail the engineering of these nanosheets and their biorecognition properties employing complementary methods such as X-ray photoelectron and infrared spectroscopy, atomic force microscopy as well as surface plasmon resonance measurements. The desired functionality of the developed nanosheets is demonstrated by in situ selection of a His-tagged protein from a mixture and its subsequent structural analysis by cryoEM.
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Affiliation(s)
- Julian Scherr
- Department of Chemistry, University of Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt, Germany
| | - Zian Tang
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743 Jena, Germany
| | - Maria Küllmer
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743 Jena, Germany
| | - Sebastian Balser
- Department of Chemistry, University of Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt, Germany
| | - Alexander Stefan Scholz
- Department of Chemistry, University of Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt, Germany
| | - Andreas Winter
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743 Jena, Germany
| | - Kristian Parey
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Str. 3, 60438 Frankfurt, Germany
| | - Alexander Rittner
- Institute of Organic Chemistry and Chemical Biology, Buchmann Institute for Molecular Life Sciences, University of Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt, Germany
| | - Martin Grininger
- Institute of Organic Chemistry and Chemical Biology, Buchmann Institute for Molecular Life Sciences, University of Frankfurt, Max-von-Laue-Str. 15, 60438 Frankfurt, Germany
| | - Volker Zickermann
- Institute of Biochemistry II, Medical School, University of Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Daniel Rhinow
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Str. 3, 60438 Frankfurt, Germany
| | - Andreas Terfort
- Department of Chemistry, University of Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt, Germany
| | - Andrey Turchanin
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Lessingstr. 10, 07743 Jena, Germany
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19
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Dokmai V, Kundhikanjana W, Chanlek N, Sinthiptharakoon K, Sae-Ueng U, Phuthong W, Pavarajarn V. Effects of catalyst surfaces on adsorption revealed by atomic force microscope force spectroscopy: photocatalytic degradation of diuron over zinc oxide. Phys Chem Chem Phys 2020; 22:15035-15047. [PMID: 32597447 DOI: 10.1039/d0cp02454f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controlling adsorption of a heterogeneous catalyst requires a detailed understanding of the interactions between reactant molecules and the catalyst surface. Various characteristics relevant to adsorption have been theoretically predicted but have yet to be experimentally quantified. Here, we explore a model reaction based on diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea] photo-degradation over a ZnO particle catalyst. We used atomic force microscope (AFM)-based force spectroscopy under ambient conditions to investigate interactions between individual functional groups of diuron (NH2, Cl, and CH3) and surfaces of ZnO particles (polar Zn and O-terminated, and nonpolar Zn-O terminated). We were able to distinguish and identify the two polar surfaces of conventional ZnO particles and the nonpolar surface of ZnO nanorods based on force-distance curves of functionalized probe/surface pairs. We posit that the reaction involved physisorption and could be described in terms of Hamaker constants. These constants had an order-of-magnitude difference among the probe/surface interacting pairs based on polarity. Hence, we confirmed that van der Waals interactions determined the adsorption behavior. We interpreted the electronic distribution models of the probe-modifying molecules. The functional group configurations inferred the diuron adsorption configurations during contact with each ZnO facet. The adsorption affected characteristics of the reaction intermediates and the rate of degradation.
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Affiliation(s)
- Vipada Dokmai
- Center of Excellence in Particle and Materials Processing Technology, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Worasom Kundhikanjana
- School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Narong Chanlek
- Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima 30000, Thailand
| | - Kitiphat Sinthiptharakoon
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Phathum Thani 12120, Thailand
| | - Udom Sae-Ueng
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Phathum Thani 12120, Thailand
| | - Witchukorn Phuthong
- Department of Physics, Faculty of Science, Kasetsart University, Ladyao, Chatuchak, Bangkok 10900, Thailand.
| | - Varong Pavarajarn
- Center of Excellence in Particle and Materials Processing Technology, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
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20
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Tang Z, George A, Winter A, Kaiser D, Neumann C, Weimann T, Turchanin A. Optically Triggered Control of the Charge Carrier Density in Chemically Functionalized Graphene Field Effect Transistors. Chemistry 2020; 26:6473-6478. [PMID: 32150652 PMCID: PMC7318135 DOI: 10.1002/chem.202000431] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/22/2020] [Indexed: 01/14/2023]
Abstract
Field effect transistors (FETs) based on 2D materials are of great interest for applications in ultrathin electronic and sensing devices. Here we demonstrate the possibility to add optical switchability to graphene FETs (GFET) by functionalizing the graphene channel with optically switchable azobenzene molecules. The azobenzene molecules were incorporated to the GFET channel by building a van der Waals heterostructure with a carbon nanomembrane (CNM), which is used as a molecular interposer to attach the azobenzene molecules. Under exposure with 365 nm and 455 nm light, azobenzene molecules transition between cis and trans molecular conformations, respectively, resulting in a switching of the molecular dipole moment. Thus, the effective electric field acting on the GFET channel is tuned by optical stimulation and the carrier density is modulated.
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Affiliation(s)
- Zian Tang
- Institute of Physical ChemistryFriedrich Schiller University JenaLessingstraße 1007743JenaGermany
| | - Antony George
- Institute of Physical ChemistryFriedrich Schiller University JenaLessingstraße 1007743JenaGermany
| | - Andreas Winter
- Institute of Physical ChemistryFriedrich Schiller University JenaLessingstraße 1007743JenaGermany
| | - David Kaiser
- Institute of Physical ChemistryFriedrich Schiller University JenaLessingstraße 1007743JenaGermany
| | - Christof Neumann
- Institute of Physical ChemistryFriedrich Schiller University JenaLessingstraße 1007743JenaGermany
| | - Thomas Weimann
- Physikalisch-Technische Bundesanstalt (PTB)Bundesallee 10038116BraunschweigGermany
| | - Andrey Turchanin
- Institute of Physical ChemistryFriedrich Schiller University JenaLessingstraße 1007743JenaGermany
- Jena Center for Soft MatterPhilosophenweg 707743JenaGermany
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21
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Viltres H, Odio OF, Biesinger MC, Montiel G, Borja R, Reguera E. Preparation of Amine‐ and Disulfide‐Containing PAMAM‐Based Dendrons for the Functionalization of Hydroxylated Surfaces: XPS as Structural Sensor. ChemistrySelect 2020. [DOI: 10.1002/slct.202000432] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Herlys Viltres
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad LegariaInstituto Politécnico Nacional Ciudad de México México
| | - Oscar F. Odio
- CONACyT-Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Legaria Ciudad México México
| | | | | | - Raúl Borja
- Centro de Nanociencias y Micro-NanotecnologíasInstituto Politécnico Nacional Ciudad de México, Distrito Federal, México
| | - Edilso Reguera
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad LegariaInstituto Politécnico Nacional Ciudad de México México
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22
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Novel bone-mimetic nanohydroxyapatite/collagen porous scaffolds biomimetically mineralized from surface silanized mesoporous nanobioglass/collagen hybrid scaffold: Physicochemical, mechanical and in vivo evaluations. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110660. [PMID: 32204088 DOI: 10.1016/j.msec.2020.110660] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/07/2020] [Accepted: 01/10/2020] [Indexed: 12/18/2022]
Abstract
Bone-mimetic scaffolds are receiving much interest as such scaffolds exhibit excellent biocompatibility and very close mimic to bone structure and composition. Here, novel bone-mimetic nanohydroxyapatite (nHA)/collagen (Col) porous scaffolds (nHA/Col) were prepared from surface silanized mesoporous nanobioglass (NBG)/Col hybrid scaffold by biomimetic mineralization. Surface silanized mesoporous NBG was prepared by ultrasound-assisted sol-gel method and post treatment with 3-aminopropyltriethylsilane (APTS). The surface silanized mesoporous NBG was characterized by transmission electron microscopy (TEM), transmission electron microscopy-selected area electron diffraction (TEM-SAED) and X-ray photoelectron spectroscopy (XPS). The physicochemical/mechanical characterizations of the scaffolds included scanning electron microscopy (SEM) and TEM imaging of micro/nanostructure, energy dispersive X-ray (EDX) analysis of chemical composition, TEM-SAED and X-ray diffraction/Attenuated total Reflectance-Fourier Infrared spectroscopy (XRD/ATR-FTIR) analyses of amorphous-to-crystalline transformations, thermogravimetric/differential scanning calorimetric (TGA/DSC) analyses of thermal behaviour , porosity and dynamic mechanical analyses. The presence of NBG in collagen fibrillar network enabled progressive growth of HA nanocrystals and generation of a novel bone-mimetic hybrid structures while preserving the highly porous structure of collagen scaffold. The crystallinity, crystallite size and crystal morphology of the grown HA nanocrystals were controllable by regulation of the mineralization time. Furthermore, the osteogenic properties of the non-mineralized (NBG/Col) and mineralized (nHA/Col) hybrid porous scaffolds were examined in vivo using critical-sized calvarial bone defect model in rat. Histological and micro-computed tomography (Micro-CT) analyses after 6 weeks of implantation revealed that the mineralized scaffolds possess excellent in vivo osteogenic potential compared to the non-mineralized one. Collectively, by using surface silanized mesoporous NBG hybridization with collagen fibrillar network, we successfully introduced a new approach for developing novel bone-mimetic nanohydroxyapatite/collagen hybrid scaffolds that possess significant potential for bone tissue regeneration.
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23
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Li K, Xue Y, Zhou J, Han J, Zhang L, Han Y. Silanized NaCa2HSi3O9 nanorods with a reduced pH increase on Ti for improving osteogenesis and angiogenesis in vitro. J Mater Chem B 2020; 8:691-702. [DOI: 10.1039/c9tb02321f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
NaCa2HSi3O9 nanorods with silane layers allow efficient Ca and Si release and controlled pH increase, and can enhance osteogenesis and angiogenesis on the Ti implant surface.
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Affiliation(s)
- Kai Li
- State-Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Yang Xue
- State-Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Jianhong Zhou
- Institute of Physics & Optoelectronics Technology
- Advanced Titanium Alloys and Functional Coatings Cooperative Innovation Center
- Baoji University of Arts and Sciences
- Baoji
- China
| | - Jing Han
- School of Public Health
- Health Science Center
- Xi'an Jiaotong University
- Xi'an 710061
- China
| | - Lan Zhang
- State-Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Yong Han
- State-Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
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24
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Lima RBW, Barreto SC, Hajhamid B, de Souza GM, de Goes MF. Effect of cleaning protocol on silica deposition and silica-mediated bonding to Y-TZP. Dent Mater 2019; 35:1603-1613. [DOI: 10.1016/j.dental.2019.08.099] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 07/25/2019] [Accepted: 08/20/2019] [Indexed: 11/28/2022]
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25
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Madsen KE, Wade KA, Haasch RT, Buchholz DB, Bassett KL, Nicolau BG, Gewirth AA. Origin of Enhanced Cyclability in Covalently Modified LiMn 1.5Ni 0.5O 4 Cathodes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:39890-39901. [PMID: 31577115 DOI: 10.1021/acsami.9b12912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
High-voltage lithium-ion cathode materials exhibit exceptional energy densities; however, rapid capacity fade during cell cycling prohibits their widespread utilization. Surface modification of cathode-active materials by organic self-assembled monolayers (SAMs) has emerged as an approach to improve the longevity of high-voltage electrodes; however, the surface chemistry at the electrode/electrolyte interphase and its dependence on monolayer structure remains unclear. Herein, we investigate the interplay between monolayer structure, electrochemical performance, and surface chemistry of high-voltage LiMn1.5Ni0.5O4 (LMNO) electrodes by the application of silane-based SAMs of variable length and chemical composition. We demonstrate that the application of both hydrophobic and hydrophilic monolayers results in improved galvanostatic capacity retention relative to unmodified LMNO. The extent of this improvement is tied to the structure of the monolayer with fluorinated alkyl-silanes exhibiting the greatest overall capacity retention, above 96% after 100 charge/discharge cycles. Postmortem surface analysis reveals that the presence of the monolayer enhances the deposition of LiF at the electrode surface during cell cycling and that the total surface concentration correlates with the overall improvements in capacity retention. We propose that the enhanced deposition of highly insulating LiF increases the anodic stability of the interphase, contributing to the improved galvanostatic performance of modified electrodes. Moreover, this work demonstrates that the modification of the electrode surface by the selection of an appropriate monolayer is an effective approach to tune the properties and behavior of the electrode/electrolyte interphase formed during battery operation.
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Affiliation(s)
- Kenneth E Madsen
- Department of Chemistry , University of Illinois at Urbana-Champaign , 600 South Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Kevin A Wade
- Department of Chemistry , University of Illinois at Urbana-Champaign , 600 South Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Richard T Haasch
- Frederick Seitz Materials Research Laboratory , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - D Bruce Buchholz
- Department of Materials Science and Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| | - Kimberly L Bassett
- Department of Chemistry , University of Illinois at Urbana-Champaign , 600 South Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Bruno G Nicolau
- Department of Chemistry , University of Illinois at Urbana-Champaign , 600 South Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Andrew A Gewirth
- Department of Chemistry , University of Illinois at Urbana-Champaign , 600 South Mathews Avenue , Urbana , Illinois 61801 , United States
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26
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Physicochemical and morphological characterization of a glass ceramic treated with different ceramic primers and post-silanization protocols. Dent Mater 2019; 35:1073-1081. [PMID: 31113684 DOI: 10.1016/j.dental.2019.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 05/03/2019] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Evaluate the effect of different ceramic primers and post-silanization protocols on physicochemical and morphological characteristics of a lithium disilicate glass ceramic. METHODS Lithium disilicate ceramic (IPS e-max CAD) plaques (6 × 10 × 2 mm) were divided into 3 groups according to the ceramic primer used: (1) Silane (RelyX Ceramic Primer-RL); (2) Silane + MDP (Clearfil Ceramic Primer Plus-CP); (3) Self-etching ceramic primer (Monobond Etch and Prime-MB). Specimens from each group were distributed into 5 sub-groups according to post-silanization protocols: (a) Treated as recommended by the manufacturer (MR), (b) MR + Additional drying with air at room temperature for 30 s (RTA), (c) MR + additional drying with hot air for 30 s (HT), (d) MR + Surface rinsing with water at room temperature for 10 s and drying with air at room temperature for 30 s (WT), and (e) Specimens were not silanized (NS). Surface free energy (SFE) was determined using static contact angles measurements with water and diiodomethane. SFE data were submitted to Friedman followed by Wilcoxon post-hoc test (α = 0.05). Morphology was analyzed using scanning electron microscopy. Elemental composition and chemical interactions were determined with X-ray photoelectron spectroscopy analysis. RESULTS RL presented the highest SFE (62.4 mN/m) followed by CP (59.7 mN/m). Post-silanization protocols resulted in similar SFE, but WT and HT induced the highest water contact angles when using CP and RL. CP modified ceramics' surface morphology compared to the etched and RL treated groups. The presence of water was identified on CP treated specimen. All analyzed primers formed siloxane bonds with ceramic surface. SIGNIFICANCE Ceramic primers resulted in different surface free energy and morphology, but siloxane bonds were identified for all tested solutions. HT and WT protocols should be used with RL and CP primers. MB was not influenced by the different silanization protocols.
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Self-Assembled Monolayers on Highly Porous Low-k Dielectrics by 3-Aminopropyltrimethoxysilane Treatment. COATINGS 2019. [DOI: 10.3390/coatings9040246] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Highly porous low-dielectric-constant (low-k) dielectric materials with a dielectric constant (k) less than 2.50 are needed for 32 nm and beyond technological nodes. In this study, a highly porous low-k dielectric film with a k value of 2.25, open porosity of 32.0%, and pore diameter of 1.15 nm were treated by 3-Aminopropyltrimethoxysilane (APTMS) in wet solution in order to form self-assembled monolayers (SAMs) onto it. The effects of the formation SAMs on the electrical characteristics and reliability of highly porous low-k dielectric films were characterized. As SAMs were formed onto the highly porous low-k dielectric film by APTMS treatment, the dielectric breakdown field and the failure time were significantly improved, but at the expense of the increases in the dielectric constant and leakage current. Moreover, the formation SAMs enhanced the Cu barrier performance for highly porous low-k dielectric films. Therefore, the SAMs derived from APTMS treatment are promising for highly porous low-k dielectric films to ensure better integrity.
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Vijayamohanan H, Bhide P, Boyd D, Zhou Z, Palermo EF, Ullal CK. Effect of Chemical Microenvironment in Spirothiopyran Monolayer Direct-Write Photoresists. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3871-3879. [PMID: 30807181 DOI: 10.1021/acs.langmuir.8b03304] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We study the effect of the microenvironment on writing chemical patterns into spirothiopyran monolayers over large areas in a single step with light. Surfaces functionalized with photoresponsive spirothiopyran are fabricated by chemically modifying amine-terminated monolayers. The merocyanine isomer selectively participates in a thiol-Michael addition reaction with maleimide-functionalized molecules, rendering these surfaces ideal for fast, mask-less direct writing. The local microenvironment of spirothiopyran is found to strongly influence the kinetics of photoswitching. The quantum yield of ring opening is found to be 17 times faster for spirothiopyran surrounded by a locally charged environment rich in guanidinium diluent molecules as compared to a closed-packed monolayer without diluents. Hydrophilic environments are also found to improve the kinetics of ring closing. Optimization of the diluent concentration leads to dramatic improvements in both contrast and yield of direct writing. This enables the monolayer to be used for maskless two-color photopatterning in which spatial control over patterning is obtained by varying the relative intensity of incident UV and green light. These experiments demonstrate the capacity of spirothiopyran monolayers to serve as a versatile toolbox for rapid, large-area surface functionalization.
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Affiliation(s)
- Harikrishnan Vijayamohanan
- Department of Materials Science and Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Parth Bhide
- Department of Materials Science and Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Dante Boyd
- Department of Materials Science and Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Zhe Zhou
- Department of Materials Science and Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Edmund F Palermo
- Department of Materials Science and Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Chaitanya K Ullal
- Department of Materials Science and Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
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Nascetti A, Mirasoli M, Marchegiani E, Zangheri M, Costantini F, Porchetta A, Iannascoli L, Lovecchio N, Caputo D, de Cesare G, Pirrotta S, Roda A. Integrated chemiluminescence-based lab-on-chip for detection of life markers in extraterrestrial environments. Biosens Bioelectron 2019; 123:195-203. [DOI: 10.1016/j.bios.2018.08.056] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/23/2018] [Accepted: 08/23/2018] [Indexed: 12/13/2022]
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30
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Wang WY, Kala K, Wei TC. Solvent-Dependent Adhesion Strength of Electroless Deposited Ni-P Layer on an Amino-Terminated Silane Compound-Modified Si Wafer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13597-13602. [PMID: 30350707 DOI: 10.1021/acs.langmuir.8b01927] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Amino-terminated silane compound modification was wet-processed on a silicon wafer using four different solvents to investigate the property of the self-assembled monolayer (SAM) and its influence on the adhesion of electroless deposited nickel-phosphorus (Ni-P) films. Analyzed by various tools including dynamic light scattering, the atomic force microscope, X-ray photoelectron spectroscopy, inductively coupled plasma with mass spectroscopy, a proper link between the processing solvent and SAM quality is established. It is found that at least the chemical compatibility, the polarity, and the acidity of solvents can affect the final morphology of the resultant SAM. Unlike toluene and ethanol that are most frequently chosen in literature, we conclude that isopropyl alcohol (IPA) is a superior solvent for amino-terminated silane compounds. Owing to the good SAM quality formed in IPA, the adhesion of electroless deposited Ni-P films is largely strengthened, even as high as the bulk strength of silicon wafers.
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Affiliation(s)
- Wei-Yen Wang
- Department of Chemical Engineering , National Tsing-Hua University , 300 Hsinchu , Taiwan
| | - Kannankutty Kala
- Department of Chemical Engineering , National Tsing-Hua University , 300 Hsinchu , Taiwan
| | - Tzu-Chien Wei
- Department of Chemical Engineering , National Tsing-Hua University , 300 Hsinchu , Taiwan
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31
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Mekonnen ML, Chen CH, Su WN, Hwang BJ. 3D-functionalized shell isolated Ag nanocubes on a miniaturized flexible platform for sensitive and selective SERS detection of small molecules. Microchem J 2018. [DOI: 10.1016/j.microc.2018.06.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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32
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Bacteriophage-based strategies for biofouling control in ultrafiltration: In situ biofouling mitigation, biocidal additives and biofilm cleanser. J Colloid Interface Sci 2018; 523:254-265. [DOI: 10.1016/j.jcis.2018.03.105] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/24/2018] [Accepted: 03/29/2018] [Indexed: 11/23/2022]
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33
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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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34
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Chen GS, Yang TM, Chen ST, Cheng YL, Fang JS. A new alternative self-assembled-monolayer activation process for electroless deposition of copper interconnects without a conventional barrier. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2017.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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35
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Strle D, Štefane B, Trifkovič M, Van Miden M, Kvasić I, Zupanič E, Muševič I. Chemical Selectivity and Sensitivity of a 16-Channel Electronic Nose for Trace Vapour Detection. SENSORS (BASEL, SWITZERLAND) 2017; 17:E2845. [PMID: 29292764 PMCID: PMC5750667 DOI: 10.3390/s17122845] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 11/16/2022]
Abstract
Good chemical selectivity of sensors for detecting vapour traces of targeted molecules is vital to reliable detection systems for explosives and other harmful materials. We present the design, construction and measurements of the electronic response of a 16 channel electronic nose based on 16 differential microcapacitors, which were surface-functionalized by different silanes. The e-nose detects less than 1 molecule of TNT out of 10+12 N₂ molecules in a carrier gas in 1 s. Differently silanized sensors give different responses to different molecules. Electronic responses are presented for TNT, RDX, DNT, H₂S, HCN, FeS, NH₃, propane, methanol, acetone, ethanol, methane, toluene and water. We consider the number density of these molecules and find that silane surfaces show extreme affinity for attracting molecules of TNT, DNT and RDX. The probability to bind these molecules and form a surface-adsorbate is typically 10+7 times larger than the probability to bind water molecules, for example. We present a matrix of responses of differently functionalized microcapacitors and we propose that chemical selectivity of multichannel e-nose could be enhanced by using artificial intelligence deep learning methods.
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Affiliation(s)
- Drago Strle
- Faculty of Electrical Engineering, University of Ljubljana, EE dep., Tržaška 25, 1000 Ljubljana, Slovenia.
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia.
| | - Mario Trifkovič
- Faculty of Electrical Engineering, University of Ljubljana, EE dep., Tržaška 25, 1000 Ljubljana, Slovenia.
| | | | - Ivan Kvasić
- J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
| | - Erik Zupanič
- J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
| | - Igor Muševič
- J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia.
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36
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Schmidt DO, Raab N, Noyong M, Santhanam V, Dittmann R, Simon U. Resistive Switching of Sub-10 nm TiO₂ Nanoparticle Self-Assembled Monolayers. NANOMATERIALS (BASEL, SWITZERLAND) 2017; 7:E370. [PMID: 29113050 PMCID: PMC5707587 DOI: 10.3390/nano7110370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/27/2017] [Accepted: 10/31/2017] [Indexed: 12/24/2022]
Abstract
Resistively switching devices are promising candidates for the next generation of non-volatile data memories. Such devices are up to now fabricated mainly by means of top-down approaches that apply thin films sandwiched between electrodes. Recent works have demonstrated that resistive switching (RS) is also feasible on chemically synthesized nanoparticles (NPs) in the 50 nm range. Following this concept, we developed this approach further to the sub-10 nm range. In this work, we report RS of sub-10 nm TiO₂ NPs that were self-assembled into monolayers and transferred onto metallic substrates. We electrically characterized these monolayers in regard to their RS properties by means of a nanorobotics system in a scanning electron microscope, and found features typical of bipolar resistive switching.
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Affiliation(s)
- Dirk Oliver Schmidt
- JARA-FIT, 52056 Aachen, Germany.
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany.
| | - Nicolas Raab
- JARA-FIT, 52425 Jülich, Germany.
- Peter Grünberg Institut 7, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Michael Noyong
- JARA-FIT, 52056 Aachen, Germany.
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany.
| | - Venugopal Santhanam
- Department of Chemical Engineering, Indian Institute of Science, Bangalore 560012, India.
| | - Regina Dittmann
- JARA-FIT, 52425 Jülich, Germany.
- Peter Grünberg Institut 7, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Ulrich Simon
- JARA-FIT, 52056 Aachen, Germany.
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany.
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37
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Matthews R, Glasser E, Sprawls SC, French RH, Peshek TJ, Pentzer E, Martin IT. Organofunctional Silane Modification of Aluminum-Doped Zinc Oxide Surfaces as a Route to Stabilization. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17620-17628. [PMID: 28459526 DOI: 10.1021/acsami.7b02638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aluminum-doped zinc oxide (AZO) is a low-temperature processed transparent conductive oxide (TCO) made of earth abundant elements; its applications are currently limited by instability to heat, moisture, and acidic conditions. We demonstrate that the application of an organofunctional silane modifier mitigates AZO degradation and explore the interplay between performance and material composition and morphology. Specifically, we evaluate degradation of bare AZO and APTES (3-aminopropyltriethoxysilane)-modified AZO in response to damp heat (DH, 85 °C, 85% relative humidity) exposure over 1000 h and then demonstrate how surface modification impacts changes in electrical and optical properties and chemical composition in one of the most thorough studies to date. Hall measurements show that the resistivity of AZO increases due to a decrease in electron mobility, with no commensurate change in carrier concentration. APTES decelerates this electrical degradation, without affecting AZO optical properties. Percent transmission and yellowness index of an ensemble of bare and modified AZO are stable upon DH exposure, but haze increases slightly for a discrete sample of modified AZO. Atomic force microscopy (AFM) and optical profilometer (OP) measurements do not show evidence of pitting or delamination after 1000 h DH exposure but indicate a slight increase in surface roughness on both the nanometer and micrometer length scales. X-ray photoelectron spectroscopy data (XPS) reveal that the surface composition of bare and silanized AZO is stable over this time frame; oxygen vacancies, as measured by XPS, are also stable with DH exposure, which, together with transmission and Hall measurements, indicate stable carrier concentrations. However, after 1500 h of DH exposure, only bare AZO shows signs of catastrophic destruction. Comparison of the data presented herein to previous reports indicates that the initial AZO composition and microstructure dictate the degradation profile. This work demonstrates that surface modification slows the bulk degradation of AZO and provides insight into how the material can be more widely used as a transparent electrode in the next generation of optoelectronic devices.
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Affiliation(s)
- Rachael Matthews
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
| | - Emily Glasser
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
| | - Samuel C Sprawls
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
| | - Roger H French
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
| | - Timothy J Peshek
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
| | - Emily Pentzer
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
| | - Ina T Martin
- Department of Chemistry, ‡Department of Physics, §Department of Materials Science and Engineering, ∥Department of Macromolecular Science and Engineering, and ⊥Department of Biomedical Engineering, Case Western Reserve University , 10900 Euclid Ave., Cleveland, Ohio 44106, United States
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38
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Khadka K, Strandwitz NC, Ferguson GS. Byproduct-Free Route to Aminosiloxane Monolayers on Silicon/Silicon Dioxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1639-1645. [PMID: 28121157 DOI: 10.1021/acs.langmuir.6b04415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The chemisorption of N-methyl-aza-2,2,4-trimethylsilacyclopentane from either the solution or the vapor phase produces monolayer films on silicon (oxide) substrates. The formation of a covalent siloxane linkage to the surface by this adsorbate is accompanied by ring opening, which produces no byproduct. The resulting secondary amine reacts with maleic anhydride to produce a carboxylic acid-terminated surface, accompanied by the formation of a stable amide bond. These reactions and their products were characterized by a combination of optical ellipsometry, contact-angle goniometry, and X-ray photoelectron spectroscopy.
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Affiliation(s)
- Kiran Khadka
- Department of Chemistry and ‡Department of Materials Science & Engineering, Lehigh University , Bethlehem, Pennsylvania 18015, United States
| | - Nicholas C Strandwitz
- Department of Chemistry and ‡Department of Materials Science & Engineering, Lehigh University , Bethlehem, Pennsylvania 18015, United States
| | - Gregory S Ferguson
- Department of Chemistry and ‡Department of Materials Science & Engineering, Lehigh University , Bethlehem, Pennsylvania 18015, United States
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39
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Li X, Ma W, Shestopalov AA. Vapor-Phase Carbenylation of Hard and Soft Material Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11386-11394. [PMID: 27759398 DOI: 10.1021/acs.langmuir.6b02471] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study describes the formation of functional organic monolayers on hard and soft interfaces via a vapor-phase carbene insertion into Si-H and C-H bonds. We demonstrate that functional diazirine molecules can be used to form monomolecular coatings on silicon, silicon nitride, and urethane-acrylate polymers under mild vacuum conditions and exposure to UV light. We investigate the molecular coverage and the long-term stability of the resulting monolayers in air, isopropanol, and water. Our results suggest that vapor-phase carbenylation can be used as a complementary technology to the traditional self-assembly, permitting functionalization of various passivated substrates with stable and functional molecular coatings under mild and scalable conditions.
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Affiliation(s)
- Xunzhi Li
- Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States
| | - Wenchuan Ma
- Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States
| | - Alexander A Shestopalov
- Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States
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40
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Carvalho RR, Pujari SP, Lange SC, Sen R, Vrouwe EX, Zuilhof H. Local Light-Induced Modification of the Inside of Microfluidic Glass Chips. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2389-2398. [PMID: 26976049 DOI: 10.1021/acs.langmuir.5b04621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The ability to locally functionalize the surface of glass allows for myriad biomedical and chemical applications. This would be the case if the surface functionalization can be induced using light with wavelengths for which standard glass is almost transparent. To this aim, we present the first example of a photochemical modification of hydrogen-terminated glass (H-glass) with terminal alkenes. Both flat glass surfaces and the inside of glass microchannels were modified with a well-defined, covalently attached organic monolayer using a range of wavelengths, including sub-band-gap 302 nm ultraviolet light. A detailed characterization thereof was conducted by measurements of the static water contact angle, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and scanning Auger microscopy (SAM). Germanium attenuated total reflection Fourier transform infrared (GATR-FTIR) indicates that the mechanism of the surface modification proceeds via an anti-Markovnikov substitution. Reacting H-glass with 10-trifluoro-acetamide-1-decene (TFAAD) followed by basic hydrolysis affords the corresponding primary amine-terminated monolayer, enabling additional functionalization of the substrate. Furthermore, we show the successful formation of a photopatterned amine layer by the specific attachment of fluorescent nanoparticles in very discrete regions. Finally, a microchannel was photochemically patterned with a functional linker allowing for surface-directed liquid flow. These results demonstrate that H-glass can be modified with a functional tailor-made organic monolayer, has highly tunable wetting properties, and displays significant potential for further applications.
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Affiliation(s)
- Rui Rijo Carvalho
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
- Micronit Microfluidics B.V., Colosseum 15, 7521 PV Enschede, The Netherlands
| | - Sidharam P Pujari
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Stefanie C Lange
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Rickdeb Sen
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Elwin Xander Vrouwe
- Micronit Microfluidics B.V., Colosseum 15, 7521 PV Enschede, The Netherlands
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
- Department of Chemical and Materials Engineering, King Abdulaziz University , Jeddah, Saudi Arabia
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41
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Bourone SDM, Kaulen C, Homberger M, Simon U. Directed Self-Assembly and Infrared Reflection Absorption Spectroscopy Analysis of Amphiphilic and Zwitterionic Janus Gold Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:954-962. [PMID: 26726770 DOI: 10.1021/acs.langmuir.5b03897] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here, we report an approach to use infrared reflection absorption spectroscopy (IRRAS) for the unambiguous proof of the presence as well as the spatial distribution of organic ligands on the Janus gold nanoparticle (AuNP) surface. For this purpose we synthesized amphiphilic and zwitterionic Janus AuNPs and immobilized these on pretreated gold surfaces by directed self-assembly, exploiting hydrophilic/hydrophobic or electrostatic interactions, respectively. Thus, we obtained macroscopic two-dimensional arrays of Janus AuNPs exhibiting a specific orientation. These arrays were investigated by IRRAS, and the obtained spectra revealed only peaks of the ligands facing the IR beam, while the ligands facing the gold substrate were not detected due to reflection of the IR beam on the AuNP cores. Thus, we describe a straightforward spectroscopic procedure to prove the Janus character of zwitterionic and amphiphilic AuNPs in the size range of 10-15 nm.
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Affiliation(s)
- Svenja D M Bourone
- Institute of Inorganic Chemistry and JARA - Fundamentals of Future Information Technologies, RWTH Aachen University , 52074 Aachen, Germany
| | - Corinna Kaulen
- Institute of Inorganic Chemistry and JARA - Fundamentals of Future Information Technologies, RWTH Aachen University , 52074 Aachen, Germany
| | - Melanie Homberger
- Institute of Inorganic Chemistry and JARA - Fundamentals of Future Information Technologies, RWTH Aachen University , 52074 Aachen, Germany
| | - Ulrich Simon
- Institute of Inorganic Chemistry and JARA - Fundamentals of Future Information Technologies, RWTH Aachen University , 52074 Aachen, Germany
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42
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Fischer T, Dietrich PM, Unger WES, Rurack K. Multimode Surface Functional Group Determination: Combining Steady-State and Time-Resolved Fluorescence with X-ray Photoelectron Spectroscopy and Absorption Measurements for Absolute Quantification. Anal Chem 2016; 88:1210-7. [DOI: 10.1021/acs.analchem.5b03468] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobias Fischer
- Bundesanstalt für Materialforschung und −prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Paul M. Dietrich
- Bundesanstalt für Materialforschung und −prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Wolfgang E. S. Unger
- Bundesanstalt für Materialforschung und −prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Knut Rurack
- Bundesanstalt für Materialforschung und −prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
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43
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Davydova M, de los Santos Pereira A, Bruns M, Kromka A, Ukraintsev E, Hirtz M, Rodriguez-Emmenegger C. Catalyst-free site-specific surface modifications of nanocrystalline diamond films via microchannel cantilever spotting. RSC Adv 2016. [DOI: 10.1039/c6ra12194b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Microchannel cantilever spotting is combined with a copper-free click chemistry ligation to achieve the patterning of nanocrystalline diamond films.
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Affiliation(s)
- Marina Davydova
- Institute of Physics v.v.i
- Academy of Sciences of the Czech Republic
- 16200 Prague 6
- Czech Republic
| | - Andres de los Santos Pereira
- Department of Chemistry and Physics of Surfaces and Biointerfaces
- Institute of Macromolecular Chemistry v.v.i
- Academy of Sciences of the Czech Republic
- 16206 Prague 6
- Czech Republic
| | - Michael Bruns
- Institute for Applied Materials (IAM)
- Karlsruhe Nano Micro Facility (KNMF)
- Karlsruhe Institute of Technology (KIT)
- Eggenstein-Leopoldshafen
- Germany
| | - Alexander Kromka
- Institute of Physics v.v.i
- Academy of Sciences of the Czech Republic
- 16200 Prague 6
- Czech Republic
| | - Egor Ukraintsev
- Institute of Physics v.v.i
- Academy of Sciences of the Czech Republic
- 16200 Prague 6
- Czech Republic
| | - Michael Hirtz
- Institute of Nanotechnology (INT)
- Karlsruhe Nano Micro Facility (KNMF)
- Karlsruhe Institute of Technology (KIT)
- Eggenstein-Leopoldshafen
- Germany
| | - Cesar Rodriguez-Emmenegger
- Department of Chemistry and Physics of Surfaces and Biointerfaces
- Institute of Macromolecular Chemistry v.v.i
- Academy of Sciences of the Czech Republic
- 16206 Prague 6
- Czech Republic
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44
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Sahasrabudhe G, Rupich SM, Jhaveri J, Berg AH, Nagamatsu KA, Man G, Chabal YJ, Kahn A, Wagner S, Sturm JC, Schwartz J. Low-Temperature Synthesis of a TiO2/Si Heterojunction. J Am Chem Soc 2015; 137:14842-5. [DOI: 10.1021/jacs.5b09750] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Girija Sahasrabudhe
- Department
of Chemistry, ‡Department of Electrical Engineering, and §Princeton Institute for the Science
and Technology of Materials, Princeton University, Princeton, New Jersey 08544, United States
| | - Sara M. Rupich
- Department of Materials Science & Engineering, University of Texas at Dallas, Richardson, Texas 75080, United States
| | | | | | | | | | - Yves J. Chabal
- Department of Materials Science & Engineering, University of Texas at Dallas, Richardson, Texas 75080, United States
| | | | | | | | - Jeffrey Schwartz
- Department
of Chemistry, ‡Department of Electrical Engineering, and §Princeton Institute for the Science
and Technology of Materials, Princeton University, Princeton, New Jersey 08544, United States
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45
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Toren P, Ozgur E, Bayindir M. Real-Time and Selective Detection of Single Nucleotide DNA Mutations Using Surface Engineered Microtoroids. Anal Chem 2015; 87:10920-6. [DOI: 10.1021/acs.analchem.5b02664] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Pelin Toren
- Institute
of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey
- UNAM-National
Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey
| | - Erol Ozgur
- Institute
of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey
- UNAM-National
Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey
| | - Mehmet Bayindir
- Institute
of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey
- UNAM-National
Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey
- Department
of Physics, Bilkent University, 06800 Ankara, Turkey
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46
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Dietrich PM, Streeck C, Glamsch S, Ehlert C, Lippitz A, Nutsch A, Kulak N, Beckhoff B, Unger WES. Quantification of Silane Molecules on Oxidized Silicon: Are there Options for a Traceable and Absolute Determination? Anal Chem 2015; 87:10117-24. [DOI: 10.1021/acs.analchem.5b02846] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- P. M. Dietrich
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - C. Streeck
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - S. Glamsch
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - C. Ehlert
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
- Institut
für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
| | - A. Lippitz
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - A. Nutsch
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - N. Kulak
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - B. Beckhoff
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - W. E. S. Unger
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
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47
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Gentili D, Barbalinardo M, Manet I, Durso M, Brucale M, Mezzi A, Melucci M, Cavallini M. Additive, modular functionalization of reactive self-assembled monolayers: toward the fabrication of multilevel optical storage media. NANOSCALE 2015; 7:7184-7188. [PMID: 25824851 DOI: 10.1039/c5nr00346f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report a novel strategy based on iterative microcontact printing, which provides additive, modular functionalization of reactive SAMs by different functional molecules. We demonstrate that after printing the molecules form an interpenetrating network at the SAM surface preserving their individual properties. We exploited the process by fabricating new optical storage media that consist of a multilevel TAG.
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Affiliation(s)
- Denis Gentili
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129 Bologna and Via Salaria km 29, 3 00015 Monterotondo, Roma, Italy.
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48
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Fischer T, Dietrich PM, Streeck C, Ray S, Nutsch A, Shard A, Beckhoff B, Unger WES, Rurack K. Quantification of Variable Functional-Group Densities of Mixed-Silane Monolayers on Surfaces via a Dual-Mode Fluorescence and XPS Label. Anal Chem 2015; 87:2685-92. [DOI: 10.1021/ac503850f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tobias Fischer
- Division
1.9 Chemical and Optical Sensing, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Paul M. Dietrich
- Division
6.8 Surface Analysis and Interfacial Chemistry, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Cornelia Streeck
- X-ray
and IR Spectrometry Group, Physikalisch-Technische Bundesanstalt PTB, Abbestrasse
2-12, 10587 Berlin, Germany
| | - Santanu Ray
- Surface
and Nanoanalysis Group, Analytical Science Division, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom
| | - Andreas Nutsch
- X-ray
and IR Spectrometry Group, Physikalisch-Technische Bundesanstalt PTB, Abbestrasse
2-12, 10587 Berlin, Germany
| | - Alex Shard
- Surface
and Nanoanalysis Group, Analytical Science Division, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom
| | - Burkhard Beckhoff
- X-ray
and IR Spectrometry Group, Physikalisch-Technische Bundesanstalt PTB, Abbestrasse
2-12, 10587 Berlin, Germany
| | - Wolfgang E. S. Unger
- Division
6.8 Surface Analysis and Interfacial Chemistry, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Knut Rurack
- Division
1.9 Chemical and Optical Sensing, BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
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49
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Ozgur E, Toren P, Bayindir M. Phosphonate based organosilane modification of a simultaneously protein resistant and bioconjugable silica surface. J Mater Chem B 2014; 2:7118-7122. [DOI: 10.1039/c4tb01283f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Pujari SP, Scheres L, Marcelis ATM, Zuilhof H. Covalent Surface Modification of Oxide Surfaces. Angew Chem Int Ed Engl 2014; 53:6322-56. [DOI: 10.1002/anie.201306709] [Citation(s) in RCA: 583] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Indexed: 12/26/2022]
Affiliation(s)
- Sidharam P. Pujari
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (The Netherlands)
| | - Luc Scheres
- Surfix B.V. Dreijenplein 8, 6703 HB Wageningen (The Netherlands)
| | - Antonius T. M. Marcelis
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (The Netherlands)
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (The Netherlands)
- Department of Chemical and Materials Engineering, King Abdulaziz University, Jeddah (Saudi Arabia)
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