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Sans J, Azevedo Gonçalves I, Quintana R. Establishing Quartz Crystal Microbalance with Dissipation (QCM-D) Coupled with Spectroscopic Ellipsometry (SE) as an Advantageous Technique for the Characterization of Ultra-Thin Film Hydrogels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2312041. [PMID: 38438898 DOI: 10.1002/smll.202312041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/14/2024] [Indexed: 03/06/2024]
Abstract
Despite the considerable significance of utilizing ultra-thin film (utf) hydrogels as multipurpose platforms for biomedical applications, there is still an important lack of adequate characterization techniques suitable for such materials. In this Perspective, the use of quartz crystal microbalance with dissipation (QCM-D) coupled with spectral ellipsometry (SE) is presented as a potential tool for the complete characterization of utf-hydrogels due to its nanometric sensitivity and high versatility. Herein, the fundaments for utf-hydrogel characterization are settled down as far as the QCM-D/SE response is explored under a wide range of different in operando wet working conditions measurements such as temperature or liquid media, among others. Therefore, the design of measuring protocols capable to perform is proposed and compiled, for the first time, complete and precise characterization of the cross-link density, thickness variations (swelling ratio determination), stability analyses, and mechanical studies (including the simultaneous generation of stress-strain curves and the evaluation of the viscoelastic; leading to the final determination of the Poisson's ratio) under different in operando conditions. Finally, the future challenges and implications for the general characterization of soft-thin films are discussed.
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Affiliation(s)
- Jordi Sans
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, Esch/Alzette, L-4362, Luxembourg
- Departament d'Enginyeria Quínica EEBE Universitat Politècnica de Catalunya, C/ Eduard Maristany, 10-14, Barcelona, 08019, Spain
| | - Ingrid Azevedo Gonçalves
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, Esch/Alzette, L-4362, Luxembourg
- Department of Physics and Materials Science, University of Luxembourg, Esch-sur-Alzette, L-4365, Luxembourg
| | - Robert Quintana
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, Esch/Alzette, L-4362, Luxembourg
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2
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Plikusiene I, Maciulis V, Ramanavicius A, Ramanaviciene A. Spectroscopic Ellipsometry and Quartz Crystal Microbalance with Dissipation for the Assessment of Polymer Layers and for the Application in Biosensing. Polymers (Basel) 2022; 14:polym14051056. [PMID: 35267879 PMCID: PMC8915094 DOI: 10.3390/polym14051056] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 01/07/2023] Open
Abstract
Polymers represent materials that are applied in almost all areas of modern life, therefore, the characterization of polymer layers using different methods is of great importance. In this review, the main attention is dedicated to the non-invasive and label-free optical and acoustic methods, namely spectroscopic ellipsometry (SE) and quartz crystal microbalance with dissipation (QCM-D). The specific advantages of these techniques applied for in situ monitoring of polymer layer formation and characterization, biomolecule immobilization, and registration of specific interactions were summarized and discussed. In addition, the exceptional benefits and future perspectives of combined spectroscopic ellipsometry and QCM-D (SE/QCM-D) in one measurement are overviewed. Recent advances in the discussed area allow us to conclude that especially significant breakthroughs are foreseen in the complementary application of both QCM-D and SE techniques for the investigation of polymer structure and assessment of the interaction between biomolecules such as antigens and antibodies, receptors and ligands, and complementary DNA strands.
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Affiliation(s)
- Ieva Plikusiene
- Nanotechnas–Center of Nanotechnology and Materials Science, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko Str. 24, LT-03225 Vilnius, Lithuania; (V.M.); (A.R.)
- State Research Institute Centre for Physical Sciences and Technology, Sauletekio Ave. 3, LT-10257 Vilnius, Lithuania
- Correspondence: (I.P.); (A.R.)
| | - Vincentas Maciulis
- Nanotechnas–Center of Nanotechnology and Materials Science, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko Str. 24, LT-03225 Vilnius, Lithuania; (V.M.); (A.R.)
- State Research Institute Centre for Physical Sciences and Technology, Sauletekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Arunas Ramanavicius
- Nanotechnas–Center of Nanotechnology and Materials Science, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko Str. 24, LT-03225 Vilnius, Lithuania; (V.M.); (A.R.)
- State Research Institute Centre for Physical Sciences and Technology, Sauletekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Almira Ramanaviciene
- Nanotechnas–Center of Nanotechnology and Materials Science, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko Str. 24, LT-03225 Vilnius, Lithuania; (V.M.); (A.R.)
- Department of Immunology, State Research Institute Centre for Innovative Medicine, Santariskiu g. 5, LT-08406 Vilnius, Lithuania
- Correspondence: (I.P.); (A.R.)
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3
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Easley AD, Ma T, Eneh CI, Yun J, Thakur RM, Lutkenhaus JL. A practical guide to quartz crystal microbalance with dissipation monitoring of thin polymer films. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210324] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alexandra D. Easley
- Department of Materials Science and Engineering Texas A&M University College Station Texas USA
| | - Ting Ma
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station Texas USA
| | - Chikaodinaka I. Eneh
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station Texas USA
| | - Junyeong Yun
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station Texas USA
| | - Ratul M. Thakur
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station Texas USA
| | - Jodie L. Lutkenhaus
- Department of Materials Science and Engineering Texas A&M University College Station Texas USA
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station Texas USA
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Ferrand-Drake Del Castillo G, Koenig M, Müller M, Eichhorn KJ, Stamm M, Uhlmann P, Dahlin A. Enzyme Immobilization in Polyelectrolyte Brushes: High Loading and Enhanced Activity Compared to Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3479-3489. [PMID: 30742441 DOI: 10.1021/acs.langmuir.9b00056] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Catalysis by enzymes on surfaces has many applications. However, strategies for efficient enzyme immobilization with preserved activity are still in need of further development. In this work, we investigate polyelectrolyte brushes prepared by both grafting-to and grafting-from with the aim to achieve high catalytic activity. For comparison, self-assembled monolayers that bind enzymes with the same chemical interactions are included. We use the model enzyme glucose oxidase and two kinds of polymers: anionic poly(acrylic acid) and cationic poly(diethylamino)methyl methacrylate. Surface plasmon resonance and spectroscopic ellipsometry are used for accurate quantification of surface coverage. Besides binding more enzymes, the "3D-like" brush environment enhances the specific activity compared to immobilization on self-assembled monolayers. For grafting-from brushes, multilayers of enzymes were spontaneously and irreversibly immobilized without conjugation chemistry. When the pH was between the pI of the enzyme and the p Ka of the polymer, binding was considerable (thousands of ng/cm2 or up to 50% of the polymer mass), even at physiological ionic strength. However, binding was observed also when the brushes were neutrally charged. For acidic brushes (both grafting-to and grafting-from), the activity was higher for covalent immobilization compared to noncovalent. For grafting-from brushes, a fully preserved specific activity compared to enzymes in the liquid bulk was achieved, both with covalent (acidic brush) and noncovalent (basic brush) immobilization. Catalytic activity of hundreds of pmol cm-2 s-1 was easily obtained for polybasic brushes only tens of nanometers in dry thickness. This study provides new insights for designing functional interfaces based on enzymatic catalysis.
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Affiliation(s)
| | - Meike Koenig
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , D-01069 Dresden , Germany
| | - Martin Müller
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , D-01069 Dresden , Germany
- Technische Universität Dresden, Physical Chemistry of Polymer Materials, Dresden , Germany
| | - Klaus-Jochen Eichhorn
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , D-01069 Dresden , Germany
| | - Manfred Stamm
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , D-01069 Dresden , Germany
- Technische Universität Dresden, Physical Chemistry of Polymer Materials, Dresden , Germany
| | - Petra Uhlmann
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6 , D-01069 Dresden , Germany
- Department of Chemistry , University of Nebraska-Lincoln , Hamilton Hall, 639 North 12th Street , Lincoln , Nebraska 68588 , United States
| | - Andreas Dahlin
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , 41296 Göteborg , Sweden
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Hemzal D, Kang YR, Dvořák J, Kabzinski T, Kubíček K, Kim YD, Humlíček J. Treatment of Surface Plasmon Resonance (SPR) Background in Total Internal Reflection Ellipsometry: Characterization of RNA Polymerase II Film Formation. APPLIED SPECTROSCOPY 2019; 73:261-270. [PMID: 30784293 DOI: 10.1177/0003702819826280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
To deal with the general problem of biomolecule specific binding analysis, we have applied the technique of difference spectra to the surface plasmon resonance (SPR)-enhanced total internal reflection ellipsometry measurement. We suggest a three-step treatment of the SPR background that can easily be integrated with the usual measurement routine. First, making use of the difference spectrum in ellipsometric angle Δ, single peak footprints of the topmost layer are obtained that facilitate its sensitive detection during film growth. Subsequently, circumventing the need for explicit knowledge of the substrate properties, the difference spectra peaks can be used for the end-point analysis of a binding. Finally, tracking the binding effectivity of the analyte we determine the injection speed and analyte concentration windows needed for successful monitoring of the film growth. We demonstrate our approach on a comprehensive two-stage binding experiment involving two biologically relevant molecules: the C-terminal domain (CTD) of RNA polymerase II and CTD-interacting domain of one of its transcription factors, the Rtt103 protein.
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Affiliation(s)
- Dušan Hemzal
- 1 Department of Condensed Matter Physics, Masaryk University, Brno, Czech Republic
- 2 CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Yu Ri Kang
- 3 Department of Physics, Kyung Hee University, Seoul, Republic of Korea
| | - Jan Dvořák
- 1 Department of Condensed Matter Physics, Masaryk University, Brno, Czech Republic
| | - Tomasz Kabzinski
- 2 CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Karel Kubíček
- 2 CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Young Dong Kim
- 3 Department of Physics, Kyung Hee University, Seoul, Republic of Korea
| | - Josef Humlíček
- 1 Department of Condensed Matter Physics, Masaryk University, Brno, Czech Republic
- 2 CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czech Republic
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6
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Smart release of antimicrobial ZnO nanoplates from a pH-responsive keratin hydrogel. J Colloid Interface Sci 2019; 536:372-380. [DOI: 10.1016/j.jcis.2018.10.067] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 12/11/2022]
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7
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Zhang S, Li Y, Shi C, Guo F, He C, Cao Z, Hu J, Cui C, Liu H. Induced-fit adsorption of diol-based porous organic polymers for tetracycline removal. CHEMOSPHERE 2018; 212:937-945. [PMID: 30286550 DOI: 10.1016/j.chemosphere.2018.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/24/2018] [Accepted: 09/01/2018] [Indexed: 06/08/2023]
Abstract
Adsorption is recognized as one of the most efficient approaches for antibiotics removal from water. Inspired by the enzyme-substrate interaction model, we proposed induced-fit adsorption (IFA) model, and rationally designed and fabricated diol-based porous organic polymers (POPs) as adsorbents for tetracycline (TC) removal. For 2,3-naphthalenediol-based POP (NTdiol-POP), the preferable geometry of diol-groups contributed to the high binding energy with TC species and flexible methylene linkages between neighboring rigid naphthalene rings gave rise to precisely matching between TC species and adsorbents, that is, the induced-fit conformation change. As a result, NTdiol-POP exhibited a high saturated adsorption capacity of 155.8 mg g-1. More importantly, NTdiol-POP exhibited excellent TC removal efficiencies in both concentrated solution (96% for 4 p.p.m) and trace level solution (97% for 250 p.p.b).
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Affiliation(s)
| | - Yankai Li
- School of Chemistry and Molecular Engineering, China
| | - Chunhong Shi
- Shanghai Songjiang Institute for Food and Drug Control, 28 Middle Zhongshan Road, Shanghai, 201600, China
| | - Fangyuan Guo
- School of Chemistry and Molecular Engineering, China
| | - Congze He
- School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Zan Cao
- Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, China
| | - Jun Hu
- School of Chemistry and Molecular Engineering, China.
| | - Changzheng Cui
- Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, China.
| | - Honglai Liu
- School of Chemistry and Molecular Engineering, China
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8
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Peev D, Hofmann T, Kananizadeh N, Beeram S, Rodriguez E, Wimer S, Rodenhausen KB, Herzinger CM, Kasputis T, Pfaunmiller E, Nguyen A, Korlacki R, Pannier A, Li Y, Schubert E, Hage D, Schubert M. Anisotropic contrast optical microscope. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:113701. [PMID: 27910407 DOI: 10.1063/1.4965878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An optical microscope is described that reveals contrast in the Mueller matrix images of a thin, transparent, or semi-transparent specimen located within an anisotropic object plane (anisotropic filter). The specimen changes the anisotropy of the filter and thereby produces contrast within the Mueller matrix images. Here we use an anisotropic filter composed of a semi-transparent, nanostructured thin film with sub-wavelength thickness placed within the object plane. The sample is illuminated as in common optical microscopy but the light is modulated in its polarization using combinations of linear polarizers and phase plate (compensator) to control and analyze the state of polarization. Direct generalized ellipsometry data analysis approaches permit extraction of fundamental Mueller matrix object plane images dispensing with the need of Fourier expansion methods. Generalized ellipsometry model approaches are used for quantitative image analyses. These images are obtained from sets of multiple images obtained under various polarizer, analyzer, and compensator settings. Up to 16 independent Mueller matrix images can be obtained, while our current setup is limited to 11 images normalized by the unpolarized intensity. We demonstrate the anisotropic contrast optical microscope by measuring lithographically defined micro-patterned anisotropic filters, and we quantify the adsorption of an organic self-assembled monolayer film onto the anisotropic filter. Comparison with an isotropic glass slide demonstrates the image enhancement obtained by our method over microscopy without the use of an anisotropic filter. In our current instrument, we estimate the limit of detection for organic volumetric mass within the object plane of ≈49 fg within ≈7 × 7 μm2 object surface area. Compared to a quartz crystal microbalance with dissipation instrumentation, where contemporary limits require a total load of ≈500 pg for detection, the instrumentation demonstrated here improves sensitivity to a total mass required for detection by 4 orders of magnitude. We detail the design and operation principles of the anisotropic contrast optical microscope, and we present further applications to the detection of nanoparticles, to novel approaches for imaging chromatography and to new contrast modalities for observations on living cells.
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Affiliation(s)
- D Peev
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - T Hofmann
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - N Kananizadeh
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - S Beeram
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - E Rodriguez
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - S Wimer
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | | | - C M Herzinger
- J. A. Woollam Co., Inc., Lincoln, Nebraska 68508-2243, USA
| | - T Kasputis
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
| | | | - A Nguyen
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - R Korlacki
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - A Pannier
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - Y Li
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - E Schubert
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - D Hage
- Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - M Schubert
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
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9
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Neubauer N, Treß M, Winkler R, Mapesa EU, Kipnusu WK, Uhlmann P, Kremer F. Molecular Dynamics of Swollen Poly(2-vinylpyridine) Brushes. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nils Neubauer
- Institute
of Experimental Physics I, Leipzig University, 04103 Leipzig, Germany
| | - Martin Treß
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - René Winkler
- Leibniz-Institut
für Polymerforschung Dresden e.V., 01069 Dresden, Germany
| | | | - Wycliffe Kiprop Kipnusu
- Institute
of Experimental Physics I, Leipzig University, 04103 Leipzig, Germany
- Leibniz-Institut
für Oberflächenmodifizierung e.V., 04318 Leipzig, Germany
| | - Petra Uhlmann
- Leibniz-Institut
für Polymerforschung Dresden e.V., 01069 Dresden, Germany
| | - Friedrich Kremer
- Institute
of Experimental Physics I, Leipzig University, 04103 Leipzig, Germany
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10
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McNamara TP, Blanford CF. A sensitivity metric and software to guide the analysis of soft films measured by a quartz crystal microbalance. Analyst 2016; 141:2911-9. [DOI: 10.1039/c6an00143b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The TPM-sensitivity metric guides the analysis of viscoelastic thin films studied with a quartz crystal microbalance.
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Affiliation(s)
- Thomas P. McNamara
- School of Materials and Manchester Institute of Biotechnology
- University of Manchester
- Manchester
- UK
| | - Christopher F. Blanford
- School of Materials and Manchester Institute of Biotechnology
- University of Manchester
- Manchester
- UK
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11
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Investigation of Bovine Serum Albumin (BSA) Attachment onto Self-Assembled Monolayers (SAMs) Using Combinatorial Quartz Crystal Microbalance with Dissipation (QCM-D) and Spectroscopic Ellipsometry (SE). PLoS One 2015; 10:e0141282. [PMID: 26505481 PMCID: PMC4624694 DOI: 10.1371/journal.pone.0141282] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 10/05/2015] [Indexed: 11/19/2022] Open
Abstract
Understanding protein adsorption kinetics to surfaces is of importance for various environmental and biomedical applications. Adsorption of bovine serum albumin to various self-assembled monolayer surfaces including neutral and charged hydrophilic and hydrophobic surfaces was investigated using in-situ combinatorial quartz crystal microbalance with dissipation and spectroscopic ellipsometry. Adsorption of bovine serum albumin varied as a function of surface properties, bovine serum albumin concentration and pH value. Charged surfaces exhibited a greater quantity of bovine serum albumin adsorption, a larger bovine serum albumin layer thickness, and increased density of bovine serum albumin protein compared to neutral surfaces at neutral pH value. The quantity of adsorbed bovine serum albumin protein increased with increasing bovine serum albumin concentration. After equilibrium sorption was reached at pH 7.0, desorption of bovine serum albumin occurred when pH was lowered to 2.0, which is below the isoelectric point of bovine serum albumin. Our data provide further evidence that combinatorial quartz crystal microbalance with dissipation and spectroscopic ellipsometry is a sensitive analytical tool to evaluate attachment and detachment of adsorbed proteins in systems with environmental implications.
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12
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Rodenhausen KB, Davis RS, Sekora D, Liang D, Mock A, Neupane R, Schmidt D, Hofmann T, Schubert E, Schubert M. The retention of liquid by columnar nanostructured surfaces during quartz crystal microbalance measurements and the effects of adsorption thereon. J Colloid Interface Sci 2015; 455:226-35. [DOI: 10.1016/j.jcis.2015.05.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 05/19/2015] [Accepted: 05/20/2015] [Indexed: 12/31/2022]
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13
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Kasputis T, Pieper A, Rodenhausen KB, Schmidt D, Sekora D, Rice C, Schubert E, Schubert M, Pannier AK. Use of precisely sculptured thin film (STF) substrates with generalized ellipsometry to determine spatial distribution of adsorbed fibronectin to nanostructured columnar topographies and effect on cell adhesion. Acta Biomater 2015; 18:88-99. [PMID: 25712389 DOI: 10.1016/j.actbio.2015.02.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/09/2015] [Accepted: 02/13/2015] [Indexed: 01/12/2023]
Abstract
Sculptured thin film (STF) substrates consist of nanocolumns with precise orientation, intercolumnar spacing, and optical anisotropy, which can be used as model biomaterial substrates to study the effect of homogenous nanotopogrophies on the three-dimensional distribution of adsorbed proteins. Generalized ellipsometry was used to discriminate between the distributions of adsorbed FN either on top of or within the intercolumnar void spaces of STFs, afforded by the optical properties of these precisely crafted substrates. Generalized ellipsometry indicated that STFs with vertical nanocolumns enhanced total FN adsorption two-fold relative to flat control substrates and the FN adsorption studies demonstrate different STF characteristics influence the degree of FN immobilization both on top and within intercolumnar spaces, with increasing spacing and surface area enhancing total protein adsorption. Mouse fibroblasts or mouse mesenchymal stem cells were subsequently cultured on STFs, to investigate the effect of highly ordered and defined nanotopographies on cell adhesion, spreading, and proliferation. All STF nanotopographies investigated in the absence of adsorbed FN were found to significantly enhance cell adhesion relative to flat substrates; and the addition of FN to STFs was found to have cell-dependent effects on enhancing cell-material interactions. Furthermore, the amount of FN adsorbed to the STFs did not correlate with comparative enhancements of cell-material interactions, suggesting that nanotopography predominantly contributes to the biocompatibility of homogenous nanocolumnar surfaces. This is the first study to correlate precisely defined nanostructured features with protein distribution and cell-nanomaterial interactions. STFs demonstrate immense potential as biomaterial surfaces for applications in tissue engineering, drug delivery, and biosensing.
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Affiliation(s)
- Tadas Kasputis
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Alex Pieper
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Keith Brian Rodenhausen
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Daniel Schmidt
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Singapore Synchotron Light Source, National University of Singapore, 119077, Singapore; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Derek Sekora
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Charles Rice
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Eva Schubert
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Mathias Schubert
- Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Angela K Pannier
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Center for Nanohybrid Functional Materials, University of Nebraska-Lincoln, Lincoln, NE 68588, USA; Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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