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Swain Z, Derkaloustian M, Hepler KA, Nolin A, Damani VS, Bhattacharyya P, Shrestha T, Medina J, Kayser LV, Dhong CB. Self-assembled thin films as alternative surface textures in assistive aids with users who are blind. J Mater Chem B 2024; 12:10068-10081. [PMID: 39264329 PMCID: PMC11406215 DOI: 10.1039/d4tb01646g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Accepted: 09/05/2024] [Indexed: 09/13/2024]
Abstract
Current tactile graphics primarily render tactile information for blind users through physical features, such as raised bumps or lines. However, the variety of distinctive physical features that can be created is effectively saturated, and alternatives to these physical features are not currently available for static tactile aids. Here, we explored the use of chemical modification through self-assembled thin films to generate distinctive textures in tactile aids. We used two silane precursors, n-butylaminopropyltrimethoxysilane and n-pentyltrichlorosilane, to coat playing card surfaces and investigated their efficacy as a tactile coating. We verified the surface coating process and examined their durability to repeated use by traditional materials characterization and custom mesoscale friction testing. Finally, we asked participants who were both congenitally blind and braille-literate to sort the cards based on touch. We found that participants were able to identify the correct coated card with 82% accuracy, which was significantly above chance, and two participants achieved 100% accuracy. This success with study participants demonstrates that surface coatings and surface modifications might augment or complement physical textures in next-generation tactile aids.
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Affiliation(s)
- Zachary Swain
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
| | - Maryanne Derkaloustian
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
| | - Kayla A Hepler
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
| | - Abigail Nolin
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
| | - Vidhika S Damani
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
| | - Pushpita Bhattacharyya
- Department of Psychological & Brain Sciences, University of Delaware, Newark, DE, USA
- Smith-Kettlewell Eye Research Institute, San Francisco, CA, USA
| | - Tulaja Shrestha
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Jared Medina
- Department of Psychological & Brain Sciences, University of Delaware, Newark, DE, USA
- Department of Psychology, Emory University, Atlanta, GA, USA
| | - Laure V Kayser
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Charles B Dhong
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
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2
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Dhanasekaran B, Chandran M, Chellasamy G, Veerapandian M, Govindaraju S, Yun K. Red Fluorescent Copper Nanoclusters for Fluorescence, Smartphone, and Electrochemical Sensor Arrays to Detect the Monkeypox A29 Protein. ACS APPLIED BIO MATERIALS 2024; 7:6065-6077. [PMID: 39207467 DOI: 10.1021/acsabm.4c00677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
An Orthopox zoonotic viral infection called monkeypox (MPXV) is the leading infectious disease globally. MPXV can easily spread from human to human through direct and indirect sexual contact; therefore, accurate and early detection of MPXV is crucial for reducing mortality. Fluorescence-based materials have received significant attention in recent years for biomedical applications. In this study, we synthesized red-fluorescent copper nanoclusters (CuNCs) with a size of less than 10 nm, which was confirmed by high-resolution transmission electron microscopy (HR-TEM) and atomic force microscopy (Bio-AFM) analysis. The synthesized CuNCs had a high fluorescence nature and were utilized for the detection of the MPXV (A29P) by an antigen-antibody conjugation using fluorescence, smartphone colorimetric, and electrochemical sensing techniques. The antigen (A29P) and antibody (Ab A29) interaction mechanisms were studied by X-ray photoelectron spectroscopic (XPS) analysis. Furthermore, fluorescence and electrochemical sensing were performed in PBS with detection limits of 0.096 and 0.114 nM, respectively. For real-world applications, the prepared immunosensor array can detect A29P in spiked serum samples, and point-of-care (POC) analysis, a smartphone-integrated sensor array, was used to measure the RGB color changes. The results showed that synthesized CuNCs are potential materials for detecting A29P via fluorescence and smartphone colorimetric and electrochemical sensing techniques.
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Affiliation(s)
- Barkavi Dhanasekaran
- Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Murugesan Chandran
- Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Gayathri Chellasamy
- Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Mekala Veerapandian
- Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Saravanan Govindaraju
- Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Kyusik Yun
- Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea
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3
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Aoki K, Matsuzawa T, Suetsugu K, Hara M, Nagano S, Nagao Y. Influence of Humidity on Layer-by-Layer Growth and Structure in Coordination Networks. Inorg Chem 2024; 63:6674-6682. [PMID: 38560782 DOI: 10.1021/acs.inorgchem.3c04526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Metal-organic frameworks (MOFs) are promising materials because of their high designability of pores and functionalities. Especially, MOF thin films and their properties have been investigated toward applications in nanodevices. Typically, MOF thin films are fabricated by using a bottom-up method such as layer-by-layer (LbL) growth in air. Because the water molecules can coordinate and be replaced with organic linkers during synthesis, humidity conditions will be expected to influence the LbL growth processes. In this study, we fabricated MOF thin films composed of Zn2+, tetrakis-(4-carboxyphenyl)-porphyrin (TCPP), and 4,4'-bipyridyl (bpy) at 10 and 40% relative humidity (RH) conditions. Then, we investigated the humidity effects on chemical compositions of TCPP and bpy, periodic structure, orientation, and surface morphology. At high RH, coordination replacement of water with the organic linkers becomes more competitive than that at low RH, resulting in a different TCPP/bpy composition ratio between the two RH conditions. Also, more frequent coordination replacements of water with the organic linkers at high RH led to the formation of phases other than that observed at low RH, loss of growth orientation, and rough surface. The findings clarified the importance of controlling the RH condition during LbL growth to obtain the desired coordination networks.
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Affiliation(s)
- Kentaro Aoki
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Toshitaka Matsuzawa
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Kota Suetsugu
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Mitsuo Hara
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Shusaku Nagano
- Department of Chemistry, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Japan
| | - Yuki Nagao
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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Li T, Peiris CR, Aragonès AC, Hurtado C, Kicic A, Ciampi S, MacGregor M, Darwish T, Darwish N. Terminal Deuterium Atoms Protect Silicon from Oxidation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47833-47844. [PMID: 37768872 DOI: 10.1021/acsami.3c11598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
In recent years, the hybrid silicon-molecular electronics technology has been gaining significant attention for applications in sensors, photovoltaics, power generation, and molecular electronics devices. However, Si-H surfaces, which are the platforms on which these devices are formed, are prone to oxidation, compromising the mechanical and electronic stability of the devices. Here, we show that when hydrogen is replaced by deuterium, the Si-D surface becomes significantly more resistant to oxidation when either positive or negative voltages are applied to the Si surface. Si-D surfaces are more resistant to oxidation, and their current-voltage characteristics are more stable than those measured on Si-H surfaces. At positive voltages, the Si-D stability appears to be related to the flat band potential of Si-D being more positive compared to Si-H surfaces, making Si-D surfaces less attractive to oxidizing OH- ions. The limited oxidation of Si-D surfaces at negative potentials is interpreted by the frequencies of the Si-D bending modes being coupled to that of the bulk Si surface phonon modes, which would make the duration of the Si-D excited vibrational state significantly less than that of Si-H. The strong surface isotope effect has implications in the design of silicon-based sensing, molecular electronics, and power-generation devices and the interpretation of charge transfer across them.
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Affiliation(s)
- Tiexin Li
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Chandramalika R Peiris
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Albert C Aragonès
- Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Marti i Franquès 1, 08028 Barcelona, Spain
- Institut de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Carlos Hurtado
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Anthony Kicic
- Occupation, Environment and Safety, School of Population Health, Curtin University, Bentley, Western Australia 6102, Australia
- Wal-Yan Respiratory Research Centre, Telethon Kids Institute, The University of Western Australia, Nedlands, Western Australia 6009, Australia
- Department of Respiratory and Sleep Medicine, Perth Children's Hospital, Nedlands, Western Australia 6009, Australia
- Centre for Cell Therapy and Regenerative Medicine, The University of Western Australia, Nedlands, Western Australia 6009, Australia
| | - Simone Ciampi
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Melanie MacGregor
- Flinders Institute for Nanoscale Science & Technology, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Tamim Darwish
- National Deuteration Facility, Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Nadim Darwish
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
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Birdsong BK, Hoogendoorn BW, Nilsson F, Andersson RL, Capezza AJ, Hedenqvist MS, Farris S, Guerrero A, Olsson RT. Large-scale synthesis of 2D-silica (SiO x) nanosheets using graphene oxide (GO) as a template material. NANOSCALE 2023; 15:13037-13048. [PMID: 37492887 DOI: 10.1039/d3nr01048a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Graphene oxide (GO) was used in this study as a template to successfully synthesize silicon oxide (SiOx) based 2D-nanomaterials, adapting the same morphological features as the GO sheets. By performing a controlled condensation reaction using low concentrations of GO (<0.5 wt%), the study shows how to obtain 2D-nanoflakes, consisting of GO-flakes coated with a silica precursor that were ca. 500 nm in lateral diameter and ca. 1.5 nm in thickness. XPS revealed that the silanes had linked covalently with the GO sheets at the expense of the oxygen groups present on the GO surface. The GO template was shown to be fully removable through thermal treatment without affecting the nanoflake morphology of the pure SiOx-material, providing a methodology for large-scale preparation of SiOx-based 2D nanosheets with nearly identical dimensions as the GO template. The formation of SiOx sheets using a GO template was investigated for two different silane precursors, (3-aminopropyl) triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS), showing that both precursors were capable of accurately templating the graphene oxide template. Molecular modeling revealed that the choice of silane affected the number of layers coated on the GO sheets. Furthermore, rheological measurements showed that the relative viscosity was significantly affected by the specific surface area of the synthesized particles. The protocol used showed the ability to synthesize these types of nanoparticles using a common aqueous alcohol solvent, and yield larger amounts (∼1 g) of SiOx-sheets than what has been previously reported.
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Affiliation(s)
- Björn K Birdsong
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
| | - Billy W Hoogendoorn
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
| | - Fritjof Nilsson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
- Mid Sweden University, 85170 Sundsvall, Sweden
| | - Richard L Andersson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
| | - Antonio J Capezza
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
| | - Mikael S Hedenqvist
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
| | - Stefano Farris
- DeFENS - Department of Food, Environmental and Nutritional Sciences Food Packaging Laboratory, Via Celoria 2, 20133, Milan, Italy
| | - Antonio Guerrero
- Department of Chemical Engineering, Escuela Politécnica Superior, Universidad de Sevilla, 41011, Sevilla, Spain
| | - Richard T Olsson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, 11428, Stockholm, Sweden.
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Medykowska M, Wiśniewska M, Szewczuk-Karpisz K, Panek R. Interaction mechanism of heavy metal ions with the nanostructured zeolites surface – Adsorption, electrokinetic and XPS studies. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119144] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Beliaev LY, Stounbjerg PG, Finco G, Bunea AI, Malureanu R, Lindvold LR, Takayama O, Andersen PE, Lavrinenko AV. Pedestal High-Contrast Gratings for Biosensing. NANOMATERIALS 2022; 12:nano12101748. [PMID: 35630973 PMCID: PMC9145707 DOI: 10.3390/nano12101748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/09/2022] [Accepted: 05/17/2022] [Indexed: 12/04/2022]
Abstract
High-contrast gratings (HCG) are an excellent candidate for label-free detection of various kinds of biomarkers because they exhibit sharp and sensitive optical resonances. In this work, we experimentally show the performance of pedestal HCG (PHCG), which is significantly enhanced in comparison with that of conventional HCG. PCHGs were found to provide a 11.2% improvement in bulk refractive index sensitivity, from 482 nm/RIU for the conventional design to 536 nm/RIU. The observed resonance was narrower, resulting in a higher Q-factor and figure of merit. By depositing Al2O3, HfO2, and TiO2 of different thicknesses as model analyte layers, surface sensitivity values were estimated to be 10.5% better for PHCG. To evaluate the operation of the sensor in solution, avidin was employed as a model analyte. For avidin detection, the surface of the HCG was first silanized and subsequently functionalized with biotin, which is well known for its ability to bind selectively to avidin. A consistent red shift was observed with the addition of each of the functional layers, and the analysis of the spectral shift for various concentrations of avidin made it possible to calculate the limit of detection (LoD) and limit of quantification (LoQ) for the structures. PHCG showed a LoD of 2.1 ng/mL and LoQ of 85 ng/mL, significantly better than the values 3.2 ng/mL and 213 ng/mL respectively, obtained with the conventional HCG. These results demonstrate that the proposed PHCG have great potential for biosensing applications, particularly for detecting and quantifying low analyte concentrations.
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Affiliation(s)
- Leonid Yu. Beliaev
- DTU Fotonik–Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 345A, DK-2800 Kongens Lyngby, Denmark; (G.F.); (R.M.); (O.T.); (A.V.L.)
- Correspondence:
| | - Peter Groth Stounbjerg
- DTU Health–Department of Health Technology, Technical University of Denmark, Ørsteds Plads, Building 345C, DK-2800 Kongens Lyngby, Denmark; (P.G.S.); (L.R.L.); (P.E.A.)
| | - Giovanni Finco
- DTU Fotonik–Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 345A, DK-2800 Kongens Lyngby, Denmark; (G.F.); (R.M.); (O.T.); (A.V.L.)
- Optical Nanomaterial Group, Department of Physics, Institute for Quantum Electronics, ETH Zürich, Auguste-Piccard-Hof 1, HPT D5, 8093 Zürich, Switzerland
| | - Ada-Ioana Bunea
- DTU Nanolab–National Centre for Nano Fabrication and Characterization, Technical University of Denmark, Ørsteds Plads, Building 347, DK-2800 Kongens Lyngby, Denmark;
| | - Radu Malureanu
- DTU Fotonik–Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 345A, DK-2800 Kongens Lyngby, Denmark; (G.F.); (R.M.); (O.T.); (A.V.L.)
| | - Lars René Lindvold
- DTU Health–Department of Health Technology, Technical University of Denmark, Ørsteds Plads, Building 345C, DK-2800 Kongens Lyngby, Denmark; (P.G.S.); (L.R.L.); (P.E.A.)
| | - Osamu Takayama
- DTU Fotonik–Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 345A, DK-2800 Kongens Lyngby, Denmark; (G.F.); (R.M.); (O.T.); (A.V.L.)
| | - Peter E. Andersen
- DTU Health–Department of Health Technology, Technical University of Denmark, Ørsteds Plads, Building 345C, DK-2800 Kongens Lyngby, Denmark; (P.G.S.); (L.R.L.); (P.E.A.)
| | - Andrei V. Lavrinenko
- DTU Fotonik–Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 345A, DK-2800 Kongens Lyngby, Denmark; (G.F.); (R.M.); (O.T.); (A.V.L.)
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8
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Andre JS, Grant J, Greyson E, Chen X, Tucker C, Drumright R, Mohler C, Chen Z. Molecular Interactions between Amino Silane Adhesion Promoter and Acrylic Polymer Adhesive at Buried Silica Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6180-6190. [PMID: 35512318 DOI: 10.1021/acs.langmuir.2c00602] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this study, the influence of an amino silane (3-(2-aminoethylamino)-propyldimethoxymethylsilane, AEAPS) on the interfacial structure and adhesion of butyl acrylate/methyl methacrylate copolymers (BAMMAs) to silica was investigated by sum frequency generation vibrational spectroscopy (SFG). Small amounts of methacrylic acid, MAA, were included in the BAMMA polymerizations to assess the impact of carboxylic acid functionality on the glass interface. SFG was used to probe the O-H and C═O groups of incorporated MAA, ester C═O groups of BAMMA, and CH groups from all species at the silica interfaces. The addition of AEAPS resulted in a significant change in the molecular structure of the polymer at the buried interface with silica due to specific interactions between the BAMMA polymers and silane. SFG results were consistent with the formation of ionic bonds between the primary and secondary amines of the AEAPS tail group and the MAA component of the polymer, as evidenced by the loss of the MAA O-H and C═O signals at the interface. It is extensively reported in the literature that methoxy head groups of an amino silane chemically bind to the silanols of glass, leaving the amine groups available to react with various chemical functionalities. Our results are consistent with this scenario and support an adhesion promotion mechanism of amino silane with various aspects: (1) the ionic bond formation between the tail amine group and acid functionality on BAMMA, (2) the chemical coupling between the silane head group and glass, (3) migration of more ester C═O groups to the interface with order, and (4) disordering or reduced levels of CH groups at the interface. These results are important for better understanding of the mechanisms and effect of amino silanes on the adhesion between acrylate polymers and glass substrates in a variety of applications.
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Affiliation(s)
- John S Andre
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Joseph Grant
- Dow Coating Materials, Collegeville, Pennsylvania 19426, United States
| | - Eric Greyson
- Dow Coating Materials, Collegeville, Pennsylvania 19426, United States
| | - Xiaoyun Chen
- The Dow Chemical Company, Core R&D, Midland, Michigan 48674, United States
| | - Christopher Tucker
- The Dow Chemical Company, Core R&D, Midland, Michigan 48674, United States
| | - Ray Drumright
- Dow Coating Materials, Midland, Michigan 48674, United States
| | - Carol Mohler
- The Dow Chemical Company, Core R&D, Midland, Michigan 48674, United States
| | - Zhan Chen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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Chongdar S, Bhattacharjee S, Azad S, Bal R, Bhaumik A. Selective N-formylation of amines catalysed by Ag NPs festooned over amine functionalized SBA-15 utilizing CO2 as C1 source. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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10
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Thermal and mechanical properties of poly(lactic acid) filled with modified silicon dioxide: importance of the surface area. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03571-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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11
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Beter J, Maroh B, Schrittesser B, Mühlbacher I, Griesser T, Schlögl S, Fuchs PF, Pinter G. Tailored Interfaces in Fiber-Reinforced Elastomers: A Surface Treatment Study on Optimized Load Coupling via the Modified Fiber Bundle Debond Technique. Polymers (Basel) 2020; 13:polym13010036. [PMID: 33374154 PMCID: PMC7795769 DOI: 10.3390/polym13010036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 01/20/2023] Open
Abstract
The interface between the reinforcement and surrounding matrix in a fibrous composite is decisive and critical for maintaining component performance, durability, and mechanical structure properties for load coupling assessment, especially for highly flexible composite materials. The clear trend towards tailored solutions reveals that an in-depth knowledge on surface treating methods to enhance the fiber–matrix interfacial interaction and adhesion properties for an optimized load transfer needs to be ensured. This research aims to quantify the effect of several surface treatments for glass fibers applied in endless fiber-reinforced elastomers with pronounced high deformations. Due to this, the glass fiber surface is directly modified with selected sizings, using a wet chemical treatment, and characterized according to chemical and mechanical aspects. For this purpose, the interfacial adhesion performance between fibers and the surrounding matrix material is investigated by a modified fiber pull-out device. The results clearly show that an optimized surface treatment improves the interface strength and chemical bonding significantly. The fiber pull-out test confirms that an optimized fiber–matrix interface can be enhanced up to 85% compared to standard surface modifications, which distinctly provides the basis of enhanced performances on the component level. These findings were validated by chemical analysis methods and corresponding optical damage analysis.
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Affiliation(s)
- Julia Beter
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
- Correspondence: ; Tel.: +43-3842-42962-31
| | - Boris Maroh
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Bernd Schrittesser
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Inge Mühlbacher
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Thomas Griesser
- Chair of Chemistry of Polymeric Materials, Montanuniversitaet Leoben, Otto-Gloeckel Strasse 2, 8700 Leoben, Austria;
| | - Sandra Schlögl
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Peter Filipp Fuchs
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Gerald Pinter
- Department of Polymer Engineering and Science, Montanuniversitaet Leoben, Otto-Gloeckel Strasse 2, 8700 Leoben, Austria;
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12
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Fang JS, Yang TM, Pan YC, Lai GY, Cheng YL, Chen GS. Chemical-Structure Evolution Model for the Self-Assembling of Amine-Terminated Monolayers on Nanoporous Carbon-Doped Organosilicate in Tightly Controlled Environments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:15153-15161. [PMID: 33270454 DOI: 10.1021/acs.langmuir.0c02801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Amine-terminated self-assembled monolayers are molecular nanolayers, typically formed via wet-chemical solution on specific substrates for precision surface engineering or interface modification. However, homogeneous assembling of a highly ordered monolayer by the facile, wet method is rather tricky because it involves process parameters, such as solvent type, molecular concentration, soaking time and temperature, and humidity level. Here, we select 3-aminopropyltrimethoxysilane (APTMS) as a model molecule of aminosilane for the silanization of nanoporous carbon-doped organosilicate (p-SiOCH) under tightly controlled process environments. Surface mean roughness (Ra) and the water contact angle (θ) of the p-SiOCH layers upon silanization at a 10% humidity-controlled environment behave similarly and follow a three-stage evolution: a leap to a maximum at 15 min for Ra (from 0.227 to 0.411 nm) and θ (from 25 to 86°), followed by a gradual decrease to 0.225 nm and 69o, finally leveling off at the above values (>60 min). The -NH3+ fraction indicating monolayer disorientation evolves in a similar fashion. The fully grown monolayer is highly oriented yielding an unprecedented low -NH3+ fraction of 0.08 (and 0.92 of upright -NH2 groups). However, while having a similar thickness of approximately 1.4 ± 0.1 nm, the molecular layers grown at 30% relative humidity exhibit a significantly elevated -NH3+ fraction of 0.42, indicating that controlling the humidity is vital to the fabrication of highly oriented APTMS molecular layers. A bonding-structure evolution model, as distinct from those offered previously, is proposed and discussed.
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Affiliation(s)
- Jau-Shiung Fang
- Department of Materials Science and Engineering, National Formosa University, Huwei, Yunlin 632, Taiwan
| | - Tzu-Ming Yang
- Department of Materials Science and Engineering, Feng Chia University, Seatwen, Taichung 40724, Taiwan
| | - Yen-Chang Pan
- Department of Materials Science and Engineering, Feng Chia University, Seatwen, Taichung 40724, Taiwan
| | - Guan-Yu Lai
- Department of Materials Science and Engineering, Feng Chia University, Seatwen, Taichung 40724, Taiwan
| | - Yi-Lung Cheng
- Department of Electrical Engineering, National Chi-Nan University, Puli, Nantou 54561, Taiwan
| | - Giin-Shan Chen
- Department of Materials Science and Engineering, Feng Chia University, Seatwen, Taichung 40724, Taiwan
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Yang Y, Han Y, Pang R, Ho WW. Amine-Containing Membranes with Functionalized Multi-Walled Carbon Nanotubes for CO 2/H 2 Separation. MEMBRANES 2020; 10:membranes10110333. [PMID: 33182655 PMCID: PMC7698167 DOI: 10.3390/membranes10110333] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/06/2020] [Accepted: 11/08/2020] [Indexed: 11/17/2022]
Abstract
Amine-containing mixed-matrix membranes incorporated with amino-functionalized multi-walled carbon nanotubes (AF-MWNTs) were synthesized for CO2/H2 separation based on the facilitated transport mechanism. AF-MWNTs were chosen primarily as the mechanical reinforcing filler to enhance the membrane stability. At 107 °C and 0.2-MPa feed pressure, the membrane incorporated with 10 wt.% AF-MWNTs showed a CO2 permeability of 3196 Barrers and a CO2/H2 selectivity of 205. At the higher feed pressure of 1.5 MPa, owing to the carrier saturation phenomenon, the same membrane exhibited reduced transport performance with a CO2 permeability of 776 Barrers and a CO2/H2 selectivity of 31. These separation performances at both the low and high feed pressures were well above the theoretical upper bound. Furthermore, the incorporation of 10 wt.% AF-MWNTs led to a significant improvement on membrane stability. The transport performance and selective layer thickness of this membrane maintained for 100 h, which suggested that the incorporation of AF-MWNTs improved the resistance to membrane compaction upon a high feed pressure. Therefore, this work is considered as one of the crucial steps to enable the application of facilitated transport membranes to high-pressure gas processing such as syngas purification.
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Affiliation(s)
- Yutong Yang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA; (Y.Y.); (Y.H.); (R.P.)
| | - Yang Han
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA; (Y.Y.); (Y.H.); (R.P.)
| | - Ruizhi Pang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA; (Y.Y.); (Y.H.); (R.P.)
| | - W.S. Winston Ho
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210-1350, USA; (Y.Y.); (Y.H.); (R.P.)
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210-1350, USA
- Correspondence: ; Tel.: +1-614-292-9970; Fax: +1-614-292-3769
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Andersson J, Bilotto P, Mears LLE, Fossati S, Ramach U, Köper I, Valtiner M, Knoll W. Solid-supported lipid bilayers - A versatile tool for the structural and functional characterization of membrane proteins. Methods 2020; 180:56-68. [PMID: 32920130 DOI: 10.1016/j.ymeth.2020.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 02/07/2023] Open
Abstract
The cellular membrane is central to the development of single-and multicellular life, as it separates the delicate cellular interior from the hostile environment. It exerts tight control over entry and exit of substances, is responsible for signaling with other cells in multicellular organisms and prevents pathogens from entering the cell. In the case of bacteria and viruses, the cellular membrane also hosts the proteins enabling invasion of the host organism. In a very real sense therefore, the cellular membrane is central to all life. The study of the cell membrane and membrane proteins in particular has therefore attracted significant attention. Due to the enormous variety of tasks performed by the membrane, it is a highly complex and challenging structure to study. Ideally, membrane components would be studied in isolation from this environment, but unlike water soluble proteins, the amphiphilic environment provided by the cellular membrane is key to the structure and function of the cell membrane. Therefore, model membranes have been developed to provide an environment in which a membrane protein can be studied. This review presents a set of tools that enable the comprehensive characterization of membrane proteins: electrochemical tools, surface plasmon resonance, neutron scattering, the surface forces apparatus and atomic force microscopy are discussed, with a particular focus on experimental technique and data evaluation.
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Affiliation(s)
| | - Pierluigi Bilotto
- Institute of Applied Physics, Vienna University of Technology, Vienna 1040, Austria
| | - Laura L E Mears
- Institute of Applied Physics, Vienna University of Technology, Vienna 1040, Austria
| | - Stefan Fossati
- AIT Austrian Institute of Technology, 1210 Vienna, Austria; Institute of Applied Physics, Vienna University of Technology, Vienna 1040, Austria
| | - Ulrich Ramach
- Institute of Applied Physics, Vienna University of Technology, Vienna 1040, Austria; CEST Kompetenzzentrum für elektrochemische Oberflächentechnologie, Wiener Neustadt 2700, Austria
| | - Ingo Köper
- Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, SA, Australia
| | - Markus Valtiner
- Institute of Applied Physics, Vienna University of Technology, Vienna 1040, Austria; CEST Kompetenzzentrum für elektrochemische Oberflächentechnologie, Wiener Neustadt 2700, Austria
| | - Wolfgang Knoll
- AIT Austrian Institute of Technology, 1210 Vienna, Austria; CEST Kompetenzzentrum für elektrochemische Oberflächentechnologie, Wiener Neustadt 2700, Austria
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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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Miranda A, Martínez L, De Beule PAA. Facile synthesis of an aminopropylsilane layer on Si/SiO 2 substrates using ethanol as APTES solvent. MethodsX 2020; 7:100931. [PMID: 32528863 PMCID: PMC7276439 DOI: 10.1016/j.mex.2020.100931] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 05/06/2020] [Accepted: 05/15/2020] [Indexed: 12/29/2022] Open
Abstract
(3-aminopropyl)triethoxysilane (APTES) is a commonly used organosilane on surface functionalization of silicon oxide surfaces. However, its deposition process from solution-phase usually involves the use of toluene, which has often been identified as crucial for the formation of an aminopropylsilane monolayer. Toluene is ranked as a problematic solvent in the guide developed by a group referred to as the solvent sub-team of CHEM21. In this work, we propose a facile synthetic route for functionalizing a silicon substrate with APTES via solution-phase approach using only solvents that are classified as recommended. The influence of the APTES concentration, reaction times and different post-deposition conditions using acetic acid and methanol were studied in order to evaluate the quality and thickness of the organosilane layers.The method uses ethanol as APTES solvent for functionalizing silicon dioxide surfaces and only uses solvents classified as recommended. The method uses a solution phase approach, does not require complicated equipment and can be prepared at room temperature.
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Affiliation(s)
- Adelaide Miranda
- International Iberian Nanotechnology Laboratory (INL), Avenida Mestre José Veiga s/n, 4715-330 Braga, Portugal
| | - Lidia Martínez
- Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Materials Science Factory, c/ Sor Juana Inés de la Cruz, 3, Madrid, 28049, Spain
| | - Pieter A A De Beule
- International Iberian Nanotechnology Laboratory (INL), Avenida Mestre José Veiga s/n, 4715-330 Braga, Portugal
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Sosa N, Chanlek N, Wittayakun J. Facile ultrasound-assisted grafting of silica gel by aminopropyltriethoxysilane for aldol condensation of furfural and acetone. ULTRASONICS SONOCHEMISTRY 2020; 62:104857. [PMID: 31810874 DOI: 10.1016/j.ultsonch.2019.104857] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 10/27/2019] [Accepted: 11/01/2019] [Indexed: 05/24/2023]
Abstract
This work focuses on the development of a simple method to prepare heterogeneous catalysts with tunable basicity and stability for aldol condensation of furfural and acetone. Silica gel was grafted by aminopropyltriethoxysilane (APTES) with 20, 30, 40 and 50 wt. % of APTES using probe-type ultrasonicator with a power of 130 W and a frequency of 20 kHz. The grafted samples were studied by XRD, SEM, N2 sorption, FTIR, XPS, CHN and TG analysis, and CO2-TPD. The sonication facilitated the bond formation between APTES and the silica gel with less pore blocking than the conventional grafting method. The basicity of the samples was tunable with the quantity of APTES loading. The grafted samples were active catalysts for aldol condensation between furfural and acetone at 60 °C. The catalyst with 30 wt. % APTES grafting (30APS-U) provided a nearly complete furfural conversion and high furfurylbutenone selectivity. The conversion and selectivity increased with time and reached the highest values at 24 h. Thus, the catalysts with tunable basicity prepared by ultrasound-assisted grafting of silica with various APTES amounts were effective in furfural valorization.
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Affiliation(s)
- Narongrit Sosa
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Narong Chanlek
- Synchrotron Light Research Institute, Nakhon Ratchasima 30000, Thailand
| | - Jatuporn Wittayakun
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
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18
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Amino-Modified Silica as Effective Support of the Palladium Catalyst for 4-Nitroaniline Hydrogenation. Catalysts 2020. [DOI: 10.3390/catal10040375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The article describes the synthesis of aminoorgano-functionalized silica as a prospective material for catalysis application. The amino groups have electron donor properties which are valuable for the metal chemical state of palladium. Therefore, the presence of electron donor groups is important for increasing catalysts’ stability. The research is devoted to the investigation of silica amino-modified support influence on the activity and stability of palladium species in 4-nitroaniline hydrogenation process. A series of catalysts with different supports such as SiO2, SiO2-C3H6-NH2 (amino-functionalized silica), γ-Al2O3 and activated carbon were studied. The catalytic activity was studied in the hydrogenation of 4-nitroaniline to 1,4-phenylenediamine. The catalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and chemisorption of hydrogen by the pulse technique. The 5 wt.% Pd/SiO2-C3H6-NH2 catalyst exhibited the highest catalytic activity for 4-nitroaniline hydrogenation with 100% conversion and 99% selectivity with respect to 1,4-phenylenediamine.
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19
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Kundu CK, Song L, Hu Y. Sol-gel coatings from DOPO-alkoxysilanes: Efficacy in fire protection of polyamide 66 textiles. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109483] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Mekonnen ML, Chen CH, Osada M, Su WN, Hwang BJ. Dielectric nanosheet modified plasmonic-paper as highly sensitive and stable SERS substrate and its application for pesticides detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 225:117484. [PMID: 31521003 DOI: 10.1016/j.saa.2019.117484] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
The interaction of plasmonic nanoparticles with a dielectric platform gives rise to unique optical behaviors and this can be maneuvered to improve the plasmonic/SERS performances of a substrate. Herein, dielectric modified plasmonic-paper SERS substrate is developed by assembling Ag@SiO2 nanocubes on Fe-TiO2 nanosheets (NS) modified paper. The Fe-TiO2 NS being visible light responsive significantly alters the optical property of the paper and serves as a dielectric underlay for the Ag nanocubes. Hence, the incident light reflected back from the dielectric nanosheets couples with the scattered light from the Ag nanocubes leading to spatially enhanced electromagnetic field improving the SERS enhancement. The prepared dielectric modified plasmonic-paper has an average enhancement factor (EF) of 1.49 × 107 using R6G as a probe molecule. This value is superior to unmodified plasmonic-paper highlighting the coupling effect of the dielectric nanosheets. The substrate shows robust detection performance for thiabendazole and achieves a limit of detection (LOD) of 19 μg/L, which is 4-fold more sensitive than unmodified plasmonic paper. Direct swabbing test of thiabendazole sprayed apple fruit shows a discernible Raman signal down to 15 ppb indicating the utility of the substrate for point-of-need applications in food safety.
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Affiliation(s)
- Menbere Leul Mekonnen
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Ching-Hsiang Chen
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Minoru Osada
- International Center of Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) Tsubuka, Ibaraki 305-0044, Japan
| | - Wei-Nien Su
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
| | - Bing-Joe Hwang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan; National Synchrotron Radiation Research Center, Hsinchu, Taiwan.
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21
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Teixeira RI, de Lucas NC, Garden SJ, Lanterna AE, Scaiano JC. Glass wool supported ruthenium complexes: versatile, recyclable heterogeneous photoredox catalysts. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02479d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Versatile and recyclable heterogeneous photocatalysts based on the use of glass wool supported ruthenium complexes and organic dyes.
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Affiliation(s)
- Rodolfo I. Teixeira
- Department of Chemistry and Biomolecular Science and Centre for Advanced Materials Research (CAMaR)
- University of Ottawa
- Ottawa
- Canada
- Instituto de Química
| | - Nanci C. de Lucas
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Simon J. Garden
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Anabel E. Lanterna
- Department of Chemistry and Biomolecular Science and Centre for Advanced Materials Research (CAMaR)
- University of Ottawa
- Ottawa
- Canada
| | - Juan C. Scaiano
- Department of Chemistry and Biomolecular Science and Centre for Advanced Materials Research (CAMaR)
- University of Ottawa
- Ottawa
- Canada
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22
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González-Henríquez CM, Rodríguez-Umanzor FE, Guzmán D, Sarabia-Vallejos MA, Rodríguez-Hernández J. Formation of responsive hierarchical wrinkled patterns on hydrogel films via multi-step methodology. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121662] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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23
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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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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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25
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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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Investigation of the mechanism of chromium removal in (3-aminopropyl)trimethoxysilane functionalized mesoporous silica. Sci Rep 2018; 8:12078. [PMID: 30104735 PMCID: PMC6089875 DOI: 10.1038/s41598-018-29679-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/16/2018] [Indexed: 11/08/2022] Open
Abstract
We are proposed that a possible mechanism for Cr(VI) removal by functionalized mesoporous silica. Mesoporous silica was functionalized with (3-aminopropyl)trimethoxysilane (APTMS) using the post-synthesis grafting method. The synthesized materials were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), N2 adsorption-desorption analysis, Fourier-transform infrared (FT-IR), thermogravimetric analyses (TGA), and X-ray photoelectron spectroscopy (XPS) to confirm the pore structure and functionalization of amine groups, and were subsequently used as adsorbents for the removal of Cr(VI) from aqueous solution. As the concentration of APTMS increases from 0.01 M to 0.25 M, the surface area of mesoporous silica decreases from 857.9 m2/g to 402.6 m2/g. In contrast, Cr(VI) uptake increases from 36.95 mg/g to 83.50 mg/g. This indicates that the enhanced Cr(VI) removal was primarily due to the activity of functional groups. It is thought that the optimum concentration of APTMS for functionalization is approximately 0.05 M. According to XPS data, NH3+ and protonated NH2 from APTMS adsorbed anionic Cr(VI) by electrostatic interaction and changed the solution pH. Equilibrium data are well fitted by Temkin and Sips isotherms. This research shows promising results for the application of amino functionalized mesoporous silica as an adsorbent to removal Cr(VI) from aqueous solution.
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Mathew RT, Cooney RP, Malmstrom J, Doyle CS. Atomic Force Microscopy and Angular-Dependent X-ray Photoelectron Spectroscopy Studies of Anchored Quaternary Ammonium Salt Biocides on Quartz Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4750-4761. [PMID: 29597350 DOI: 10.1021/acs.langmuir.8b00535] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A siloxane surface-anchored quaternary ammonium salt (AQAS: BIOSAFE HM4100 in this study) has been chemisorbed onto a quartz substrate. The aim of this study is to elucidate, using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), the structure of the chemisorbed AQAS layers. The AQAS biocide includes a C18 alkyl chain previously invoked in lysis potency. The AQAS coverage appears in zones on the surface, which include a first layer (2.6 ± 0.1 nm) and multilayering that were explored using AFM. The XPS data exhibited two N 1s signals at about 402 and 399 eV, with only the former exhibiting angular dependence. This signal at 402 eV was assigned to the first anchored layer with perpendicular orientation determined by the AQAS anchoring to the surface. In preliminary AFM studies of bacteria on these AQAS surfaces, perturbations on the Staphylococcus aureus cells and the degradation of Escherichia coli cells suggest lysis potency.
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Synthesis of pH-sensitive poly(β-amino ester)-coated mesoporous silica nanoparticles for the controlled release of drugs. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0716-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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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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Lee WS, Kang T, Kim SH, Jeong J. An Antibody-Immobilized Silica Inverse Opal Nanostructure for Label-Free Optical Biosensors. SENSORS 2018; 18:s18010307. [PMID: 29361683 PMCID: PMC5796272 DOI: 10.3390/s18010307] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/16/2018] [Accepted: 01/16/2018] [Indexed: 12/22/2022]
Abstract
Three-dimensional SiO2-based inverse opal (SiO2-IO) nanostructures were prepared for use as biosensors. SiO2-IO was fabricated by vertical deposition and calcination processes. Antibodies were immobilized on the surface of SiO2-IO using 3-aminopropyl trimethoxysilane (APTMS), a succinimidyl-[(N-maleimidopropionamido)-tetraethyleneglycol] ester (NHS-PEG4-maleimide) cross-linker, and protein G. The highly accessible surface and porous structure of SiO2-IO were beneficial for capturing influenza viruses on the antibody-immobilized surfaces. Moreover, as the binding leads to the redshift of the reflectance peak, the influenza virus could be detected by simply monitoring the change in the reflectance spectrum without labeling. SiO2-IO showed high sensitivity in the range of 103–105 plaque forming unit (PFU) and high specificity to the influenza A (H1N1) virus. Due to its structural and optical properties, SiO2-IO is a promising material for the detection of the influenza virus. Our study provides a generalized sensing platform for biohazards as various sensing strategies can be employed through the surface functionalization of three-dimensional nanostructures.
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Affiliation(s)
- Wang Sik Lee
- Hazards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Department of Nanobiotechnology, KRIBB School of Biotechnology, University of Science and Technology, Daejeon 34113, Korea.
| | - Taejoon Kang
- Hazards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Department of Nanobiotechnology, KRIBB School of Biotechnology, University of Science and Technology, Daejeon 34113, Korea.
- BioNano Health-Guard Research Center, Global Frontier Project, 125 Gwahak-ro, Yuseong, Daejeon 34141, Korea.
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Jinyoung Jeong
- Hazards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Department of Nanobiotechnology, KRIBB School of Biotechnology, University of Science and Technology, Daejeon 34113, Korea.
- BioNano Health-Guard Research Center, Global Frontier Project, 125 Gwahak-ro, Yuseong, Daejeon 34141, Korea.
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31
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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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32
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Wang Y, Della Gaspera E, Carey BJ, Atkin P, Berean KJ, Clark RM, Cole IS, Xu ZQ, Zhang Y, Bao Q, Ou JZ, Daeneke T, Kalantar-Zadeh K. Enhanced quantum efficiency from a mosaic of two dimensional MoS2 formed onto aminosilane functionalised substrates. NANOSCALE 2016; 8:12258-12266. [PMID: 27263805 DOI: 10.1039/c6nr02197b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Developing scalable methods of growing two dimensional molybdenum disulphide (2D MoS2) with strong optical properties, on any desired substrates, is a necessary step towards industrial uptake of this material for optical applications. In this study, Si/SiO2 substrates were functionalised using self-assembled monolayers of three different aminosilanes with various numbers of amine groups and molecular lengths as underlayers for enhancing the adherence of the molybdenum precursor. The tetrahedral [MoS4](2-) anion groups from the molybdenum precursor were bonded on these silanised Si/SiO2 substrates afterwards. The substrates were then treated with a combined thermolysis and sulphurisation step. The results showed that silanisation of the substrates using the longest chains and the largest number of amine groups provided a good foundation to grow quasi 2D MoS2 made from adjacent flakes in a mosaic formation. Microscopy and spectroscopy investigations revealed that these quasi 2D MoS2 formed using this long chain aminosilane resulted in flakes with lateral dimensions in micron and submicron ranges composed of adjoining MoS2 pieces of 20 to 60 nm in lateral dimensions, dominantly made of 3 to 5 MoS2 fundamental layers. The obtained quasi 2D MoS2 shows a high internal quantum efficiency of 2.6% associated with the quantum confinement effect and high stoichiometry of the adjoining nanoflakes that form the structure of the sheets. The synthesis technique in this study is reliable and facile and offers a procedure to form large, scalable and patternable quasi 2D MoS2 sheets on various substrates with enhanced optical properties for practical applications.
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Affiliation(s)
- Yichao Wang
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia.
| | - Enrico Della Gaspera
- School of Science, RMIT University, Melbourne, Victoria, Australia and CSIRO Manufacturing Flagship, Clayton, Victoria, Australia
| | - Benjamin J Carey
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia.
| | - Paul Atkin
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia. and CSIRO Manufacturing Flagship, Clayton, Victoria, Australia
| | - Kyle J Berean
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia.
| | - Rhiannon M Clark
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia. and CSIRO Manufacturing Flagship, Clayton, Victoria, Australia
| | - Ivan S Cole
- CSIRO Manufacturing Flagship, Clayton, Victoria, Australia
| | - Zai-Quan Xu
- Department of Materials Science and Engineering, Faculty of Engineering, Monash University, Clayton 3800, Victoria, Australia
| | - Yupeng Zhang
- Department of Materials Science and Engineering, Faculty of Engineering, Monash University, Clayton 3800, Victoria, Australia
| | - Qiaoliang Bao
- Department of Materials Science and Engineering, Faculty of Engineering, Monash University, Clayton 3800, Victoria, Australia
| | - Jian Zhen Ou
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia.
| | - Torben Daeneke
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia.
| | - Kourosh Kalantar-Zadeh
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, Australia.
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33
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Bukovsky E, Castro KP, Wyatt BM, Boltalina OV, Strauss SH. Anaerobic vs. aerobic preparation of silicon nanoparticles by stirred media milling. The effects of dioxygen, milling solvent, and milling time on particle size, surface area, crystallinity, surface/near-surface composition, and reactivity. RSC Adv 2016. [DOI: 10.1039/c6ra19565b] [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] Open
Abstract
Silicon nanoparticles milled anaerobically in heptane or mesitylene are smaller and much more reactive than SiNPs milled aerobically in the same solvents for equal attritor milling times.
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Affiliation(s)
| | | | - Brent M. Wyatt
- Department of Chemistry
- Colorado State University
- Fort Collins
- USA
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34
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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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35
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Pichaimani P, Krishnan S, Arumugam H, Muthukaruppan A. Exploring the high k dielectric behavior of bio-carbon reinforced cyanate ester nanocomposites. NEW J CHEM 2015. [DOI: 10.1039/c5nj01188d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalized bio-carbon from rice husks is obtained and used to reinforce a cyanate ester matrix to achieve high k dielectric embedded capacitors.
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Affiliation(s)
| | - Srinivasan Krishnan
- Polymer Composite Lab
- Department of Chemical Engineering
- Anna University
- Chennai
- India
| | - Hariharan Arumugam
- Polymer Composite Lab
- Department of Chemical Engineering
- Anna University
- Chennai
- India
| | - Alagar Muthukaruppan
- Polymer Composite Lab
- Department of Chemical Engineering
- Anna University
- Chennai
- India
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