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Wagner JR, Fletcher J, Morin SA. Chemical activation of commodity plastics for patterned electroless deposition of robust metallic films. Chem Commun (Camb) 2022; 58:10337-10340. [PMID: 36039790 DOI: 10.1039/d2cc03848j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general approach to increase the adhesion of metal films to commodity plastic substrates using a metal-chelating polymer, polyethyleneimine, in conjunction with patterned electroless deposition is described. This general fabrication method is compatible with a diverse array of plastics and metals with properties applicable to flexible electronic circuits and electrochemical cells.
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Affiliation(s)
- Jessica R Wagner
- Department of Chemistry, University of Nebraska-Lincoln, Hamilton Hall, Lincoln, NE 68588, USA.
| | - Jared Fletcher
- Department of Chemistry, University of Nebraska-Lincoln, Hamilton Hall, Lincoln, NE 68588, USA.
| | - Stephen A Morin
- Department of Chemistry, University of Nebraska-Lincoln, Hamilton Hall, Lincoln, NE 68588, USA. .,Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.,Nebraska Center for Integrated Biomolecular Communication, University of Nebraska, Lincoln, NE 68588, USA
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2
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Dong Y, Yuan H, Bai L, Ge D, Zhu N. A comprehensive study on simultaneous enhancement of sludge dewaterability and elimination of polycyclic aromatic hydrocarbons by Fe 2+ catalyzing O 3 process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:152015. [PMID: 34843792 DOI: 10.1016/j.scitotenv.2021.152015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/12/2021] [Accepted: 11/23/2021] [Indexed: 06/13/2023]
Abstract
Simultaneous removal of polycyclic aromatic hydrocarbons (PAHs) in the process of enhancement of sludge dewaterability via oxidation of hydroxyl radicals (•OH) and flocculation of Fe3+ by Fe2+-catalyzing O3 were investigated as a novel research focus. The results showed that capillary suction time (CST) and water content of dewatered sludge cake (Wc) were reduced from 57.9 s and 85.1% to 13.6 s and 69.65% under the optimum usage of 60 mg/g dry solids (DS) O3 and 80 mg/g DS FeSO4, respectively. The relevant dewatering mechanism of Fe2+-catalyzing O3 treatment was elucidated. It was found that extracellular polymeric substances-bound (EPS-bound) and intracellular water was dramatically released through destroying sludge cells and EPS gel-like structure by produced •OH. In addition, the results of X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) and 13C NMR spectroscopy revealed that •OH oxidized and mineralized hydrophilic organic matters intensifying hydrophobicity of sludge surface. Moreover, Fe3+ generated by oxidation of Fe2+ agglomerated fragmented fine particles into large aggregates and decreased exposure of hydrophilic sites by neutralizing negative charge, which promoted water-solids separation. Meanwhile, sludge surface roughness was decreased which was determined by material type upright confocal laser microscope (CLM). As a consequence, •OH and Fe3+ were mainly responsible for enhancement of sludge dewaterability. Moreover, more than 40% of removal rate of PAHs was accomplished by Fe2+-catalyzed O3 treatment mitigating the environmental risks of PAHs spread.
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Affiliation(s)
- Yanting Dong
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Haiping Yuan
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lu Bai
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Dongdong Ge
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Nanwen Zhu
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
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3
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Castillo GA, Dickey MD, Gorman CB, Genzer J, Efimenko K. Deposition of silicate coatings on poly(ethylene terephthalate) for improved scratch and solvent resistance. J Appl Polym Sci 2022. [DOI: 10.1002/app.51800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gilbert A. Castillo
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh North Carolina USA
| | - Michael D. Dickey
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh North Carolina USA
| | | | - Jan Genzer
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh North Carolina USA
| | - Kirill Efimenko
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh North Carolina USA
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4
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Egghe T, Ghobeira R, Esbah Tabaei PS, Morent R, Hoogenboom R, De Geyter N. Silanization of Plasma-Activated Hexamethyldisiloxane-Based Plasma Polymers for Substrate-Independent Deposition of Coatings with Controlled Surface Chemistry. ACS APPLIED MATERIALS & INTERFACES 2022; 14:4620-4636. [PMID: 35014795 DOI: 10.1021/acsami.1c18223] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Plasma polymerization has emerged as an appealing technique for surface modification because of its advantages over a variety of conventional techniques, including ease-of-use and the possibility to modify nearly any substrate. One of the main challenges of plasma polymer-based surface modification, however, is having control over the coating chemistry, as plasma deposition generates a diversity of chemical structures. Therefore, this study presents an alternative plasma-based method for the fabrication of coatings that contain selective functionalities. In a first step, hexamethyldisiloxane (HMDSO) plasma polymerization is performed in a medium-pressure dielectric barrier discharge (DBD) to deposit polydimethylsiloxane (PDMS)-like coatings. In a second step, this coating is exposed to an air plasma in a similar DBD setup to introduce silanol groups on the surface. These groups are used in a third and final step as anchoring points for grafting of (3-aminopropyl)triethoxysilane (APTES) and (3-bromopropyl)trichlorosilane (BrPTCS) to selectively introduce amino or bromo groups, respectively. X-ray photoelectron spectroscopy (XPS) and water contact angle (WCA) measurements indicated that the first two steps were successful. Moreover, the coating could be synthesized on three different surfaces, namely, glass, ultrahigh-molecular-weight polyethylene, and polytetrafluoroethylene, indicating the wide applicability of the developed procedure. Afterward, XPS also proved that the APTES and BrPTCS grafting resulted in the formation of a coating containing primary amines and alkyl bromides, respectively, in combination with an organosilicon matrix containing silanol groups as remaining reactive groups, proving the successful synthesis of selective functional plasma-based coatings. The intermediate air-plasma-activation step was demonstrated to be necessary for successful and stable grafting of the final layer. In conclusion, this study established a general procedure for the development of coatings with selective functionality that can be applied on a wide variety of substrates for, e.g., biosensor applications, biomolecule, or polymer immobilization or for the synthesis of antibacterial coatings.
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Affiliation(s)
- Tim Egghe
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
| | - Rouba Ghobeira
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
| | - Parinaz Saadat Esbah Tabaei
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
| | - Rino Morent
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
| | - Nathalie De Geyter
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
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5
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Pi X, Zhang S, Wang L, Li H, Hei Y, Zheng Z, Zhou L, Wu S, Jiang F, Luo L. BiVO4 photo-catalyst with controllable wettability and its improved visible light catalytic activity for degradation of 17α-Ethinylestradiol. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.07.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Yoon B, Choi SJ, Swager TM, Walsh GF. Flexible Chemiresistive Cyclohexanone Sensors Based on Single-Walled Carbon Nanotube-Polymer Composites. ACS Sens 2021; 6:3056-3062. [PMID: 34357769 DOI: 10.1021/acssensors.1c01076] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report a chemiresistive cyclohexanone sensor on a flexible substrate based on single-walled carbon nanotubes (SWCNTs) functionalized with thiourea (TU) derivatives. A wrapper polymer containing both 4-vinylpyridine (4VP) groups and azide groups (P(4VP-VBAz)) was employed to obtain a homogeneous SWCNT dispersion via noncovalent functionalization of SWCNTs. The P(4VP-VBAz)-SWCNT composite dispersion was then spray-coated onto an organosilanized flexible poly(ethylene terephthalate) (PET) film to achieve immobilizing quaternization between the pyridyl groups from the polymer and the functional PET substrate, thereby surface anchoring SWCNTs. Subsequent surface functionalization was performed to incorporate a TU selector into the composites, resulting in P(Q4VP-VBTU)-SWCNT, for the detection of cyclohexanone via hydrogen bonding interactions. An increase in conductance was observed as a result of the hydrogen-bonded complex with cyclohexanone resulting in a higher hole density and/or mobility in SWCNTs. As a result, a sensor device fabricated with P(Q4VP-VBTU)-SWCNT composites exhibited chemiresistive responses (ΔG/G0) of 7.9 ± 0.6% in N2 (RH 0.1%) and 4.7 ± 0.4% in air (RH 5%), respectively, upon exposure to 200 ppm cyclohexanone. Selective cyclohexanone detection was achieved with minor responses (ΔG/G0 < 1.4% at 500 ppm) toward interfering volatile organic compounds (VOC). analytes. We demonstrate a robust sensing platform using the polymer-SWCNT composites on a flexible PET substrate for potential application in wearable sensors.
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Affiliation(s)
- Bora Yoon
- Optical and Electromagnetic Materials Team, U.S. Army Combat Capabilities Development Command Soldier Center (DEVCOM SC), Natick, Massachusetts 01760, United States
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Seon-Jin Choi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Division of Materials of Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Timothy M. Swager
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Gary F. Walsh
- Optical and Electromagnetic Materials Team, U.S. Army Combat Capabilities Development Command Soldier Center (DEVCOM SC), Natick, Massachusetts 01760, United States
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7
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Lorusso E, Feng Y, Schneider J, Kamps L, Parasothy N, Mayer‐Gall T, Gutmann JS, Ali W. Investigation of aminolysis routes on PET fabrics using different amine‐based materials. NANO SELECT 2021. [DOI: 10.1002/nano.202100121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Emanuela Lorusso
- Deutsches Textilforschungszentrum Nord‐West ÖP GmbH Adlerstr. 1 Krefeld 47798 Germany
- Department of Physical Chemistry and Center of Nanointegration (CENIDE) University of Duisburg‐Essen Universitätsstr. 2 Essen 45141 Germany
| | - Ying Feng
- Department of Physical Chemistry and Center of Nanointegration (CENIDE) University of Duisburg‐Essen Universitätsstr. 2 Essen 45141 Germany
| | - Jessica Schneider
- Deutsches Textilforschungszentrum Nord‐West gGmbH Adlerstr. 1 Krefeld 47798 Germany
| | - Leonie Kamps
- Deutsches Textilforschungszentrum Nord‐West gGmbH Adlerstr. 1 Krefeld 47798 Germany
| | - Nirtharsan Parasothy
- Department of Physical Chemistry and Center of Nanointegration (CENIDE) University of Duisburg‐Essen Universitätsstr. 2 Essen 45141 Germany
| | - Thomas Mayer‐Gall
- Deutsches Textilforschungszentrum Nord‐West ÖP GmbH Adlerstr. 1 Krefeld 47798 Germany
- Deutsches Textilforschungszentrum Nord‐West gGmbH Adlerstr. 1 Krefeld 47798 Germany
| | - Jochen S. Gutmann
- Deutsches Textilforschungszentrum Nord‐West ÖP GmbH Adlerstr. 1 Krefeld 47798 Germany
- Department of Physical Chemistry and Center of Nanointegration (CENIDE) University of Duisburg‐Essen Universitätsstr. 2 Essen 45141 Germany
- Deutsches Textilforschungszentrum Nord‐West gGmbH Adlerstr. 1 Krefeld 47798 Germany
| | - Wael Ali
- Deutsches Textilforschungszentrum Nord‐West ÖP GmbH Adlerstr. 1 Krefeld 47798 Germany
- Deutsches Textilforschungszentrum Nord‐West gGmbH Adlerstr. 1 Krefeld 47798 Germany
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8
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Durable functionalization of polyethylene terephthalate fabrics using metal oxides nanoparticles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Mathew B, Ruiz P, Dutta S, Entrekin JT, Zhang S, Patel KD, Simmons MS, Augelli-Szafran CE, Cowell RM, Suto MJ. Structure-activity relationship (SAR) studies of N-(3-methylpyridin-2-yl)-4-(pyridin-2-yl)thiazol-2-amine (SRI-22819) as NF-ҡB activators for the treatment of ALS. Eur J Med Chem 2020; 210:112952. [PMID: 33139114 DOI: 10.1016/j.ejmech.2020.112952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/18/2020] [Accepted: 10/19/2020] [Indexed: 11/25/2022]
Abstract
ALS is a rare type of progressive neurological disease with unknown etiology. It results in the gradual degeneration and death of motor neurons responsible for controlling the voluntary muscles. Identification of mutations in the superoxide dismutase (SOD) 1 gene has been the most significant finding in ALS research. SOD1 abnormalities have been associated with both familial as well as sporadic ALS cases. SOD2 is a highly inducible SOD that performs in concurrence with SOD1 to detoxify ROS. Induction of SOD2 can be obtained through activation of NF-ҡBs. We previously reported that SRI-22819 increases NF-ҡB expression and activation in vitro, but it has poor ADME properties in general and has no oral bioavailability. Our initial studies were focused on direct modifications of SRI-22819. There were active compounds identified but no improvement in microsomal stability was observed. In this context, we focused on making more significant structural changes in the core of the molecule. Ataluren, an oxadiazole compound that promotes read-through and expression of dystrophin in patients with Duchenne muscular dystrophy, bears some structural similarity to SRI-22819. Thus, we synthesized a series of SRI-22819 and Ataluren (PTC124) hybrid compounds. Several compounds from this series exhibited improved activity, microsomal stability and lower calculated polar surface area (PSA). This manuscript describes the synthesis and biological evaluation of SRI-22819 analogs and its hybrid combination with Ataluren.
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Affiliation(s)
- Bini Mathew
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA.
| | - Pedro Ruiz
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA.
| | - Shilpa Dutta
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA.
| | - Jordan T Entrekin
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA
| | - Sixue Zhang
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA
| | - Kaval D Patel
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA
| | - Micah S Simmons
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA
| | - Corinne E Augelli-Szafran
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA.
| | - Rita M Cowell
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA.
| | - Mark J Suto
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL, 35205, USA.
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10
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Liu J, Zhang H, Xue D, Ahmad AU, Xia X, Liu Y, Huang H, Guo W, Liang H. An effective hydroxylation route for a highly sensitive glucose sensor using APTES/GOx functionalized AlGaN/GaN high electron mobility transistor. RSC Adv 2020; 10:11393-11399. [PMID: 35495354 PMCID: PMC9050454 DOI: 10.1039/c9ra09446f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 03/05/2020] [Indexed: 11/21/2022] Open
Abstract
A highly sensitive glucose sensor based on AlGaN/GaN high electron mobility transistor (HEMT) has been fabricated. The hydroxyl groups on the GaN surface were achieved by the decomposition of hydrogen peroxide solution (H2O2) under UV irradiation for the production of hydroxyl radicals. The self-assembled monolayers (SAMs) of 3-aminopropyltriethoxysilane (APTES) with terminal amino groups formed on the hydroxylation surface were used as substrates for glucose oxidase (GOx) immobilization. The chemical groups on the GaN surface after hydroxylation were confirmed by X-ray photoelectron spectroscopy. From the analysis of current signals, the biosensor constructed with APTES/GOx exhibited good current response to glucose over a linear range from 10 to 100 µM with a sensitivity of 3.15 × 104 µA mM−1 cm−2 and a detection limit of 10 nM. Meanwhile, the anticipated idea about the hydroxylation of GaN surface, can be an efficient approach for the design of AlGaN/GaN HEMT based biosensors in the future. A highly sensitive glucose sensor based on AlGaN/GaN high electron mobility transistor (HEMT) has been fabricated.![]()
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Affiliation(s)
- Jun Liu
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Heqiu Zhang
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Dongyang Xue
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Aqrab Ul Ahmad
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Xiaochuan Xia
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Yang Liu
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Huishi Huang
- Jiangsu Xinguanglian Technology Co., Ltd Wuxi Jiangsu P. R. China 214192
| | - Wenping Guo
- Shandong Novoshine Co., Ltd Weifang Shandong P. R. China 261000
| | - Hongwei Liang
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
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11
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One-Bath Pretreatment for Enhancing the Color Yield and Anti-Static Properties of Inkjet Printed Polyester Using Disperse Inks. MATERIALS 2019; 12:ma12111820. [PMID: 31195599 PMCID: PMC6600704 DOI: 10.3390/ma12111820] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 05/26/2019] [Accepted: 05/31/2019] [Indexed: 11/17/2022]
Abstract
This paper presents a simple and economical method for preparing durable anti-static functionalized inkjet prints by using P[St-BA-F6]—novel antistatic agents synthesized by an oxidative polymerization of styrene, butyl acrylate, and allyl alcohol polyether F6. The P[St-BA-F6] was characterized by gel permeation chromatography and Fourier transformation infrared spectroscopy. One bath pretreatment solution containing P[St-BA-F6] and pentaerythritol tetraacrylate (PETA) were applied to polyester fabrics before inkjet printing, in order to enhance the color yield and the anti-static properties. The pretreatment conditions, including the concentrations of P[St-BA-F6], curing temperature, and time, were optimized based on inkjet printed polyester fabrics. SEM (scanning electron microscope), XPS (X-ray photoelectron spectroscopy), XRD (X-ray diffractometer), TG (thermogravimetric), and DSC (differential scanning calorimetry) examined the fabrics. The results showed that the treated PET fabrics exhibited good applied performances, such as higher color yield, better dry rubbing fastness, lower electrostatic voltage, and durable anti-static properties, even after washing 10 times. These results can be attributed to alcohol polythene group (F6) and allyl group (PETA). PETA can be cross-linked with P[St-BA-F6] and PET fiber. The thermal stability of the treated fabric was lower than that of the untreated fabric, owing to the presence of resin film on the fiber surface.
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12
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Zhou T, Zhao X, Wu S, Su L, Zhao Y. Efficient capture of aqueous humic acid using a functionalized stereoscopic porous activated carbon based on poly(acrylic acid)/food-waste hydrogel. J Environ Sci (China) 2019; 77:104-114. [PMID: 30573074 DOI: 10.1016/j.jes.2018.06.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 06/21/2018] [Accepted: 06/22/2018] [Indexed: 06/09/2023]
Abstract
Stereoscopic porous carbons have shown good potential in humic acid (HA) removal. In this work, a novel stereoscopic porous activated carbon (SPAC) was designed and synthesized via the self-assembly of a hydrogel based on food waste during in-situ polymerization, vacuum drying, carbonization, and activation. Then, the SPAC was functionalized with 3-aminopropyltriethoxysilane (APTES) and the adsorption behavior of the modified SPAC (SPAC-NH2) was studied systematically. The effects of pH, contact time, initial concentration of HA, and adsorbent dose were investigated, showing that optimal HA removal efficiency (>98.0%) could be achieved at an initial HA concentration of 100 mg/L. The experimental adsorption isotherm data was fitted to the Langmuir model with a maximum adsorption capacity of 156.0 mg HA/g SPAC-NH2. Analysis of the mechanism indicated that the removal of HA was mainly realized through the amidization reaction between the COOH groups of HA and the NH2 groups of APTES. All of the above results showed that SPAC-NH2 powder is an efficient, eco-friendly, and reusable adsorbent which is suitable for the removal of HA from wastewater.
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Affiliation(s)
- Tao Zhou
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xin Zhao
- Shanghai Chengpei Enterprise Management Consulting Co., Ltd., Shanghai 200000, China
| | - Shuya Wu
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Lianghu Su
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China
| | - Youcai Zhao
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai 200092, China.
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Kahyaoglu LN, Rickus JL. Robust Covalent Coupling Scheme for the Development of FRET Aptasensor based on Amino-Silane-Modified Graphene Oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14586-14596. [PMID: 30398888 DOI: 10.1021/acs.langmuir.8b02663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In recent years, numerous aptamers have been physisorbed on graphene oxide (GO) to develop fluorescence resonance energy transfer-based aptasensors using the fluorescence quenching property of GO. However, physisorbed aptasensors show poor signal reversibility and reproducibility as well as nonspecific probe displacement, and thereby are not suitable for many analytical applications. To overcome these problems when working with complex biological samples, we developed a facile and robust covalent surface functionalization technique for GO-based fluorescent aptasensors using a well-studied adenosine triphosphate binding aptamer (ABA). In the scheme, GO is first modified with amino-silane, and further with glutaraldehyde to create available carbonyl groups for the covalent attachment of a fluorophore and an amino dual modified ABA. The surface modification method was characterized by ζ-potential, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy (FTIR). The linearity, sensitivity, selectivity, and reversibility of the resulting GO-based covalent aptasensor was determined and systematically compared with the physisorbed aptasensor. Although both sensors showed similar performance in terms of sensitivity and linearity, better selectivity and higher resistance to nonspecific probe displacement was achieved with the developed covalent ABA sensor. The surface modification technique developed here is independent of the aptamer sequence, and therefore could be used universally for different analytical applications simply by changing the aptamer sequence for the target biomolecule.
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14
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Zhen G, Lu X, Su L, Kobayashi T, Kumar G, Zhou T, Xu K, Li YY, Zhu X, Zhao Y. Unraveling the catalyzing behaviors of different iron species (Fe 2+ vs. Fe 0) in activating persulfate-based oxidation process with implications to waste activated sludge dewaterability. WATER RESEARCH 2018; 134:101-114. [PMID: 29407644 DOI: 10.1016/j.watres.2018.01.072] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 01/27/2018] [Accepted: 01/30/2018] [Indexed: 05/27/2023]
Abstract
Dewatering of waste activated sludge (WAS) is of major interest in its volume reduction, transportation and ultimate disposal. Persulfate-based oxidation process is a newly developed option for enhancing WAS dewaterability through the generation of powerful sulfate radicals (SO4-·). However, the enhancement in WAS dewaterability by persulfate differs with the species of iron catalysts used. In this study, two types of iron catalysts (i.e. Fe2+ vs. Fe0) were employed to initiate the persulfate (S2O82-), and the catalyzing behaviors and the underlying principles in enhancing WAS dewaterability were investigated and compared. The Fe2+ exhibited the high effectiveness in catalyzing the decomposition of persulfate to sulfate radicals (SO4-·), inducing the greater improvement in WAS dewatering. The WAS dewaterability (indicated by dry solids content after filtration) increased with the added S2O82-/Fe2+ dosages, with the dry solids content reaching up to 5.1 ± 0.8 wt% at S2O82-/Fe2+ dosages of 1.2/1.5 mmol/g-VS after only 30 s' filtration, roughly 1.8-fold increase than raw WAS (1.8 ± 0.1 wt%). In contrast, the influence of the persulfate oxidation when activated with Fe0 on WAS dewaterability was statistically insignificant. The WAS dewaterability remained nearly unchanged (i.e. dry solids content of 2.0 ± 0.0 wt%), irrespective of the employed S2O82-/Fe0 dosages. Further analysis demonstrated that the WAS dewaterability negatively corresponded to loosely bound extracellular polymeric substances (LB-EPS) and tightly bound EPS (TB-EPS). The abundant SO4-· from S2O82-/Fe2+ system could effectively disrupt the gel-like EPS matrix, break apart the cells and subsequently arouse the release of the water inside EPS and cells, facilitating water-solid separation. In the case of S2O82-/Fe0, the dissolution of Fe0 particles was the rate-limiting step, due to the formation of oxide iron layer near Fe0 metallic surface, which resulted in the slow SO4-· production and thus hardly promoted WAS dewaterability. The pH adjustment could accelerate Fe0 dissolution and enhance the dewatering performance of S2O82-/Fe0 process to a certain degree, but the effect was unsatisfactory. Additionally, the observations regarding the dissolved organic matters and ammonium collectively revealed that except for enhancing WAS dewatering, S2O82-/Fe2+ oxidation could concurrently degrade COD and ammonia from WAS filtrate, lighten the burden of the subsequent sewage treatment facilities and reduce operational expense. Hence, from an environmental and economic perspective, the S2O82-/Fe2+ system possesses much greater promise for WAS dewatering.
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Affiliation(s)
- Guangyin Zhen
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Dongchuan Rd. 500, Shanghai 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai 200092, PR China.
| | - Xueqin Lu
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan.
| | - Lianghu Su
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, 210042, Nanjing, PR China
| | - Takuro Kobayashi
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Gopalakrishnan Kumar
- Department of Environmental Engineering, Daegu University, Jillyang, Gyeongsan, Gyeongbuk, Republic of Korea
| | - Tao Zhou
- The State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, PR China
| | - Kaiqin Xu
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Xuefeng Zhu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Dongchuan Rd. 500, Shanghai 200241, PR China
| | - Youcai Zhao
- The State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, PR China
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Taylor JM, Perez-Toralla K, Aispuro R, Morin SA. Covalent Bonding of Thermoplastics to Rubbers for Printable, Reel-to-Reel Processing in Soft Robotics and Microfluidics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30. [PMID: 29315917 DOI: 10.1002/adma.201705333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/03/2017] [Indexed: 05/12/2023]
Abstract
The lamination of mechanically stiff structures to elastic materials is prevalent in biological systems and popular in many emerging synthetic systems, such as soft robotics, microfluidics, stretchable electronics, and pop-up assemblies. The disparate mechanical and chemical properties of these materials have made it challenging to develop universal synthetic procedures capable of reliably adhering to these classes of materials together. Herein, a simple and scalable procedure is described that is capable of covalently laminating a variety of commodity ("off-the-shelf") thermoplastic sheets to silicone rubber films. When combined with laser printing, the nonbonding sites can be "printed" onto the thermoplastic sheets, enabling the direct fabrication of microfluidic systems for actuation and liquid handling applications. The versatility of this approach in generating thin, multifunctional laminates is demonstrated through the fabrication of milliscale soft actuators and grippers with hinged articulation and microfluidic channels with built-in optical filtering and pressure-dependent geometries. This method of fabrication offers several advantages, including technical simplicity, process scalability, design versatility, and material diversity. The concepts and strategies presented herein are broadly applicable to the soft robotics, microfluidics, and advanced and additive manufacturing communities where hybrid rubber/plastic structures are prevalent.
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Affiliation(s)
- Jay M Taylor
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Karla Perez-Toralla
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Ruby Aispuro
- Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Stephen A Morin
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
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