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Mathis C, Divandari M, Simic R, Naik VV, Benetti EM, Isa L, Spencer ND. ATR-IR Investigation of Solvent Interactions with Surface-Bound Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7588-95. [PMID: 27397856 PMCID: PMC4974601 DOI: 10.1021/acs.langmuir.6b02086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Solvent interactions with bulk and surface-bound polymer brushes are crucial for functionalities such as controlled friction and thermoresponsive adhesion. To study such interactions, the temperature-induced solvent-quality changes and the effect of surface tethering on the mechanical and tribological properties of poly(dodecyl methacrylate) (P12MA) brushes have been investigated by means of attenuated total reflection infrared spectroscopy (ATR-IR), as well as atomic force microscopy (AFM) and lateral force microscopy (LFM). These results have been compared with temperature-dependent UV-visible spectrophotometry (UV-vis) data for the corresponding bulk polymer solutions. The ATR-IR results clearly show that increasing temperature enhances ethanol uptake in P12MA, which results in film swelling. This is accompanied by a marked increase in both adhesion and friction. We have also shown that a combination of solvents, such as toluene and ethanol, can lead to a temperature-dependent solvent partitioning within the polymer brush. To our knowledge this is the first time preferential solvent uptake in a grafted-from brush has been monitored via in situ ATR-IR. Moreover, we have observed remarkably different behavior for polymer chains in solution compared to the behavior of similar chains bound to a surface. The presented findings on the temperature-dependent solvent interactions of surface-grafted P12MA reveal previously unknown solvation phenomena and open up a range of possible applications in the area of stimuli-responsive materials.
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Affiliation(s)
- Christian
H. Mathis
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Mohammad Divandari
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Rok Simic
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Vikrant V. Naik
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Edmondo M. Benetti
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Lucio Isa
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Nicholas D. Spencer
- Laboratory for Surface Science and
Technology and Laboratory for Interfaces, Soft matter
and Assembly, Department of Materials, ETH
Zurich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
- E-mail:
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Bojko A, Andreatta G, Montagne F, Renaud P, Pugin R. Fabrication of thermo-responsive nano-valve by grafting-to in melt of poly(N-isopropylacrylamide) onto nanoporous silicon nitride membranes. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.05.048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Teixeira F, Popa AM, Guimond S, Hegemann D, Rossi RM. Synthesis of poly(oligo(ethylene glycol)methacrylate)-functionalized membranes for thermally controlled drug delivery. J Appl Polym Sci 2012. [DOI: 10.1002/app.38730] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Theoretical considerations on mechanisms of harvesting cells cultured on thermoresponsive polymer brushes. Biomaterials 2012; 33:4975-87. [DOI: 10.1016/j.biomaterials.2012.03.060] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 03/17/2012] [Indexed: 11/20/2022]
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Punzet M, Baurecht D, Varga F, Karlic H, Heitzinger C. Determination of surface concentrations of individual molecule-layers used in nanoscale biosensors by in situ ATR-FTIR spectroscopy. NANOSCALE 2012; 4:2431-8. [PMID: 22399200 DOI: 10.1039/c2nr12038k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
For the development of nanowire sensors for chemical and medical detection purposes, the optimal functionalization of the surface is a mandatory component. Quantitative ATR-FTIR spectroscopy was used in situ to investigate the step-by-step layer formation of typical functionalization protocols and to determine the respective molecule surface concentrations. BSA, anti-TNF-α and anti-PSA antibodies were bound via 3-(trimethoxy)butylsilyl aldehyde linkers to silicon-oxide surfaces in order to investigate surface functionalization of nanowires. Maximum determined surface concentrations were 7.17 × 10(-13) mol cm(-2) for BSA, 1.7 × 10(-13) mol cm(-2) for anti-TNF-α antibody, 6.1 × 10(-13) mol cm(-2) for anti-PSA antibody, 3.88 × 10(-13) mol cm(-2) for TNF-α and 7.0 × 10(-13) mol cm(-2) for PSA. Furthermore we performed antibody-antigen binding experiments and determined the specific binding ratios. The maximum possible ratio of 2 was obtained at bulk concentrations of the antigen in the μg ml(-1) range for TNF-α and PSA.
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Affiliation(s)
- Manuel Punzet
- Institute of Biophysical Chemistry, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
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Amiri Naini C, Franzka S, Frost S, Ulbricht M, Hartmann N. Untersuchungen zur intrinsischen Schaltkinetik ultradünner thermoresponsiver Polymerbürsten. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Amiri Naini C, Franzka S, Frost S, Ulbricht M, Hartmann N. Probing the Intrinsic Switching Kinetics of Ultrathin Thermoresponsive Polymer Brushes. Angew Chem Int Ed Engl 2011; 50:4513-6. [DOI: 10.1002/anie.201100140] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 03/08/2011] [Indexed: 11/06/2022]
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