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Kim YC, Composto RJ, Winey KI. pH-Mediated Size-Selective Adsorption of Gold Nanoparticles on Diblock Copolymer Brushes. ACS NANO 2023; 17:9224-9234. [PMID: 37134256 DOI: 10.1021/acsnano.3c00212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Precise control of nanoparticles at interfaces can be achieved by designing stimuli-responsive surfaces that have tunable interactions with nanoparticles. In this study, we demonstrate that a polymer brush can selectively adsorb nanoparticles according to size by tuning the pH of the buffer solution. Specifically, we developed a facile polymer brush preparation method using a symmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) block copolymer deposited on a grafted polystyrene layer. This method is based on the assembly of a PS-b-P2VP thin film oriented with parallel lamellae that remains after exfoliation of the top PS-b-P2VP layer. We characterized the P2VP brush using X-ray reflectivity and atomic force microscopy. The buffer pH is used to tailor interactions between citrate-coated gold nanoparticles (AuNPs) and the top P2VP block that behaves like a polymer brush. At low pH (∼4.0) the P2VP brushes are strongly stretched and display a high density of attractive sites, whereas at neutral pH (∼6.5) the P2VP brushes are only slightly stretched and have fewer attractive sites. A quartz crystal microbalance with dissipation monitored the adsorption thermodynamics as a function of AuNP diameter (11 and 21 nm) and pH of the buffer. Neutral pH provides limited penetration depth for nanoparticles and promotes size selectivity for 11 nm AuNP adsorption. As a proof of concept, the P2VP brushes were exposed to various mixtures of large and small AuNPs to demonstrate selective capture of the smaller AuNPs. This study shows the potential of creating devices for nanoparticle size separations using pH-sensitive polymer brushes.
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Affiliation(s)
- Ye Chan Kim
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Russell J Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Karen I Winey
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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2
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Kotoulas KT, Campbell J, Skirtach AG, Volodkin D, Vikulina A. Surface Modification with Particles Coated or Made of Polymer Multilayers. Pharmaceutics 2022; 14:2483. [PMID: 36432674 PMCID: PMC9697854 DOI: 10.3390/pharmaceutics14112483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/09/2022] [Accepted: 11/14/2022] [Indexed: 11/19/2022] Open
Abstract
The coating of particles or decomposable cores with polyelectrolytes via Layer-by-Layer (LbL) assembly creates free-standing LbL-coated functional particles. Due to the numerous functions that their polymers can bestow, the particles are preferentially selected for a plethora of applications, including, but not limited to coatings, cargo-carriers, drug delivery vehicles and fabric enhancements. The number of publications discussing the fabrication and usage of LbL-assembled particles has consistently increased over the last vicennial. However, past literature fails to either mention or expand upon how these LbL-assembled particles immobilize on to a solid surface. This review evaluates examples of LbL-assembled particles that have been immobilized on to solid surfaces. To aid in the formulation of a mechanism for immobilization, this review examines which forces and factors influence immobilization, and how the latter can be confirmed. The predominant forces in the immobilization of the particles studied here are the Coulombic, capillary, and adhesive forces; hydrogen bonding as well as van der Waal's and hydrophobic interactions are also considered. These are heavily dependent on the factors that influenced immobilization, such as the particle morphology and surface charge. The shape of the LbL particle is related to the particle core, whereas the charge was dependant on the outermost polyelectrolyte in the multilayer coating. The polyelectrolytes also determine the type of bonding that a particle can form with a solid surface. These can be via either physical (non-covalent) or chemical (covalent) bonds; the latter enforcing a stronger immobilization. This review proposes a fundamental theory for immobilization pathways and can be used to support future research in the field of surface patterning and for the general modification of solid surfaces with polymer-based nano- and micro-sized polymer structures.
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Affiliation(s)
- Konstantinos T. Kotoulas
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK
| | - Jack Campbell
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK
- Bavarian Polymer Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Dr.-Mack-Straße 77, 90762 Fürth, Germany
| | - Andre G. Skirtach
- Bio-Nanotechnology Laboratory, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Dmitry Volodkin
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK
| | - Anna Vikulina
- Bavarian Polymer Institute, Friedrich-Alexander-Universität Erlangen-Nürnberg, Dr.-Mack-Straße 77, 90762 Fürth, Germany
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3
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Scroccarello A, Della Pelle F, Del Carlo M, Compagnone D. Optical plasmonic sensing based on nanomaterials integrated in solid supports. A critical review. Anal Chim Acta 2022; 1237:340594. [DOI: 10.1016/j.aca.2022.340594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022]
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Mitomo H, Ijiro K. Controlled Nanostructures Fabricated by the Self-Assembly of Gold Nanoparticles via Simple Surface Modifications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210031] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Hideyuki Mitomo
- Research Institute for Electronic Science (RIES), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Kuniharu Ijiro
- Research Institute for Electronic Science (RIES), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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5
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Nakamura S, Mitomo H, Ijiro K. Assembly and Active Control of Nanoparticles using Polymer Brushes as a Scaffold. CHEM LETT 2021. [DOI: 10.1246/cl.200767] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Satoshi Nakamura
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya, Aichi 463-8560, Japan
| | - Hideyuki Mitomo
- Research Institute for Electronic Science, Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Kuniharu Ijiro
- Research Institute for Electronic Science, Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Kita 21, Nishi 11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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6
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Jao CY, Samaimongkol P, Robinson HD. Tunable gap plasmons in gold nanospheres adsorbed into a pH-responsive polymer film. J Colloid Interface Sci 2019; 553:197-209. [PMID: 31203004 DOI: 10.1016/j.jcis.2019.06.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/01/2019] [Accepted: 06/06/2019] [Indexed: 12/24/2022]
Abstract
HYPOTHESIS Plasmon nanorulers are exquisitely sensitive distance sensors that are based on the electromagnetic interaction between metal nanoparticles and surfaces. We hypothesize that nanorulers can act as quantitative probes of processes such as particle aggregation and adsorption, and deploy them to investigate particle adsorption onto stimulus-responsive polymer films. While such systems have previously been qualitatively investigated with plasmon nanorulers, our quantitative analysis should provide deeper insights. EXPERIMENT Gold nanospheres are adsorbed from solution onto pH-responsive, amine-rich polyelectrolyte multilayer (PEM) films that are either directly deposited on a gold substrate or onto an intermediate self-assembled monolayer (SAM) of charged thiols. Fitting the optical scattering spectrum to a full-wave calculation, we quantify the sphere-substrate gap distance with good accuracy. FINDINGS We find that the gold spheres partially embed into the PEMs rather than ride on top of them, and that although the amount of actuation of the spheres afforded by tuning the pH is well controlled, it is significantly smaller than the corresponding thickness changes in unstrained films. Further, the presence of a SAM below the PEM increases the amount of polymer in the PEM, except for the thickest and most highly charged films, where the SAM instead appears to displace from the area below the nanospheres.
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Affiliation(s)
- Chih-Yu Jao
- Department of Physics, Virginia Tech, United States
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7
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Boyaciyan D, Krause P, von Klitzing R. Making strong polyelectrolyte brushes pH-sensitive by incorporation of gold nanoparticles. SOFT MATTER 2018; 14:4029-4039. [PMID: 29670976 DOI: 10.1039/c8sm00411k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Doping polymer brushes with gold nanoparticles (AuNPs) results in composite materials with colorimetric sensor properties. The present paper addresses the effect of electrostatic particle-particle interaction and the effect of the polymer brush type on particle assembly formation within the polymer matrix. The prospect for long-term use as colorimetric sensors is tested. Therefore, two different types of brushes of pH-insensitive polymers, non-ionic poly(N-isopropylacrylamide) (PNIPAM) and cationic poly-[2-(methacryloyloxy)ethyl] trimethylammonium chloride (PMETAC), are studied. After incubation of the non-ionic PNIPAM brush in an aqueous suspension of AuNPs with a pH-sensitive carboxylic acid capping, hydrogen binding led to attachment of the AuNPs, but they were easily detached at high pH due to loss of the hydrogen binding. In contrast, the anionic AuNPs adhere well to cationic PMETAC brushes even after post-treatment at low pH where the charge density of the AuNPs is strongly reduced. Therefore, the PMETAC/AuNP composites were further tested with respect to their stability against pH variations and their impact for colorimetric sensors. Although the neat PMETAC brush is not pH-sensitive, after embedding pH-sensitive AuNPs, the PMETAC/AuNP composite becomes pH-sensitive in a reversible manner. This is detectable by the reversible shift of the plasmon band and the reversible thickness change of the composites by exposing them to different pH.
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Affiliation(s)
- D Boyaciyan
- Soft Matter at Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, 64287 Darmstadt, Germany.
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8
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Hsu SW, Rodarte AL, Som M, Arya G, Tao AR. Colloidal Plasmonic Nanocomposites: From Fabrication to Optical Function. Chem Rev 2018; 118:3100-3120. [DOI: 10.1021/acs.chemrev.7b00364] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Su-Wen Hsu
- Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, MC 0448, La Jolla, California 92039-0448, United States
| | - Andrea L. Rodarte
- Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, MC 0448, La Jolla, California 92039-0448, United States
| | - Madhura Som
- Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, MC 0448, La Jolla, California 92039-0448, United States
| | - Gaurav Arya
- Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, MC 0448, La Jolla, California 92039-0448, United States
| | - Andrea R. Tao
- Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, MC 0448, La Jolla, California 92039-0448, United States
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9
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Christau S, Moeller T, Genzer J, Koehler R, von Klitzing R. Salt-Induced Aggregation of Negatively Charged Gold Nanoparticles Confined in a Polymer Brush Matrix. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00866] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Stephanie Christau
- Stranski
Laboratory for Physical Chemistry, Technische Universitaet Berlin, Str. des 17. Juni 124, 10623 Berlin, Germany
- Department of Chemical & Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695-7905, United States
| | - Tim Moeller
- Stranski
Laboratory for Physical Chemistry, Technische Universitaet Berlin, Str. des 17. Juni 124, 10623 Berlin, Germany
| | - Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695-7905, United States
| | - Ralf Koehler
- Institute
of Soft Matter and Functional Materials (F-ISFM), Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
- Landesamt fuer
Arbeitsschutz, Verbraucherschutz und Gesundheit, Muellroser Chaussee 50, 15236 Frankfurt (Oder), Germany
| | - Regine von Klitzing
- Department
of Physics, Soft Matter at Interfaces, Technische Universitaet Darmstadt, Alarich-Weiss-Strasse 10, 64287 Darmstadt, Germany
- Joint Laboratory
for Structural Research (JLSR) of Helmholtz-Zentrum Berlin fuer Materialien
und Energie (HZB), Institut für Physik, Humboldt-University Berlin, Newtonstr. 15, 12489 Berlin, Germany
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10
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Khan AU, Scruggs C, Hicks D, Liu G. Two-Dimensional Plasmonic Nanoparticle as a Nanoscale Sensor to Probe Polymer Brush Formation. Anal Chem 2017. [PMID: 28629218 DOI: 10.1021/acs.analchem.7b01361] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Assad U. Khan
- Department
of Chemistry, ‡Materials Science and Engineering, and §Macromolecules Innovation Institute, Virginia Tech, 800 West Campus Drive, Blacksburg, Virginia 24061, United States
| | - Clayton Scruggs
- Department
of Chemistry, ‡Materials Science and Engineering, and §Macromolecules Innovation Institute, Virginia Tech, 800 West Campus Drive, Blacksburg, Virginia 24061, United States
| | - David Hicks
- Department
of Chemistry, ‡Materials Science and Engineering, and §Macromolecules Innovation Institute, Virginia Tech, 800 West Campus Drive, Blacksburg, Virginia 24061, United States
| | - Guoliang Liu
- Department
of Chemistry, ‡Materials Science and Engineering, and §Macromolecules Innovation Institute, Virginia Tech, 800 West Campus Drive, Blacksburg, Virginia 24061, United States
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11
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Sivashanmugan K, Liu PC, Tsai KW, Chou YN, Lin CH, Chang Y, Wen TC. An anti-fouling nanoplasmonic SERS substrate for trapping and releasing a cationic fluorescent tag from human blood solution. NANOSCALE 2017; 9:2865-2874. [PMID: 28169391 DOI: 10.1039/c6nr08077d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In bioenvironmental detection, surface-enhanced Raman scattering (SERS) signals are greatly affected by anti-specific biomolecule adsorption, which generates strong background noise, reducing detection sensitivity and selectivity. It is thus necessary to modify the SERS substrate surface to make it anti-fouling to maintain excellent SERS signals. Herein, we propose a zwitterionic copolymer, namely poly(glycidyl methacrylate-co-sulfobetaine methacrylate) (poly(GMA-co-SBMA)), for the surface modification of SERS substrates, which were fabricated and characterized spectroscopically. The copolymer was grafted onto Ag nanocubes (NCs) on an Ag surface with massive nanogaps via 1,2-ethanedithiol, which acted as a metal-insulator-metal (MIM) substrate. The high density of poly(GMA-co-SBMA) grafted near NCs favored the formation of connections between adjacent NCs, causing strong surface plasmon resonance at these junctions. With the zwitterionic-copolymer-modified surface, the adhesion of large biomolecules in platelet-rich plasma (PRP) solution can be effectively resisted, as determined from immunoassay and fibrinogen adsorption results. The SERS signals for malachite green (MG) in PRP solution (10-6 M) were effectively distinguished using the copolymer-grafted MIM substrate. MG was deposited on adjacent copolymer-grafted NCs, which amplified the SERS signals. Moreover, the copolymer connected adjacent NCs, inducing the electromagnetic effect at copolymer-grafted surfaces, which improved the SERS mechanism. The hydration process restructured the MG-trapped copolymer-grafted surface, decreasing the number of MG characteristic peak regions and increasing that of the copolymer regions. These results reveal that grafting a copolymer onto an MIM substrate allows MG to be easily trapped and released in complex biomatrices and increases surface reproducibility due to anti-fouling, leading to high SERS enhancement.
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Affiliation(s)
- Kundan Sivashanmugan
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Po-Chun Liu
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Kai-Wei Tsai
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Ying-Nien Chou
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Chen-Hsueh Lin
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Yung Chang
- R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li, Taoyuan 320, Taiwan
| | - Ten-Chin Wen
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
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12
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Christau S, Möller T, Brose F, Genzer J, Soltwedel O, von Klitzing R. Effect of gold nanoparticle hydrophobicity on thermally induced color change of PNIPAM brush/gold nanoparticle hybrids. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.03.088] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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13
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Elmahdy MM, Drechsler A, Uhlmann P, Stamm M. Swelling and Surface Interactions of End-Grafted Poly(2-vinylpyridine) Layers in Acidic Solution: Influence of Grafting Density and Salt Concentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5451-5459. [PMID: 27172173 DOI: 10.1021/acs.langmuir.6b00316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In previous studies, the authors found that end-grafted layers of the weak polybase poly(2-vinylpyridine) (P2VP) in aqueous solutions do not only swell and collapse if the pH value and salt concentration are varied but also exhibit a pH- and salinity-dependent adhesion to microsized silica spheres. For a better understanding of these effects, in situ force measurements using the AFM colloidal probe technique were applied to end-grafted P2VP layers of different grafting densities in NaCl solutions at pH 2.5. Although a mushroom-to-brush transition could be seen in the dry state, the layers were in the brush regime in aqueous solutions at all NaCl concentrations and grafting densities. We observed an increase of the brush height with increasing grafting density and a salinity-dependent collapse and reswelling of the brushes. The adhesion between the P2VP layer and a silica sphere depended on both grafting density and salinity. At low salt concentrations, the adhesion reached its highest value at the intermediate grafting density and disappeared with denser brushes. Maximum adhesion was obtained for high NaCl concentrations and the lowest grafting density. From a detailed analysis of the experiments, we gained insight into chain stretching and density profiles under complex ionic conditions and into the mechanism of adhesion of polyelectrolytes to solid surfaces.
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Affiliation(s)
- Mahdy M Elmahdy
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6, 01069 Dresden, Germany
- Department of Physics, Mansoura University , Mansoura 35516, Egypt
| | - Astrid Drechsler
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6, 01069 Dresden, Germany
| | - Petra Uhlmann
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6, 01069 Dresden, Germany
- Department of Chemistry, Hamilton Hall, University of Nebraska-Lincoln , 639 North 12th Street, Lincoln, Nebraska 68588, United States
| | - Manfred Stamm
- Leibniz Institute of Polymer Research Dresden , Hohe Str. 6, 01069 Dresden, Germany
- Physical Chemistry of Polymer Materials, Technische Universität Dresden , 01062 Dresden, Germany
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14
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Tian L, Liu KK, Fei M, Tadepalli S, Cao S, Geldmeier JA, Tsukruk VV, Singamaneni S. Plasmonic Nanogels for Unclonable Optical Tagging. ACS APPLIED MATERIALS & INTERFACES 2016; 8:4031-41. [PMID: 26812528 DOI: 10.1021/acsami.5b11399] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We demonstrate the fabrication of novel functional gel coatings with randomized physical and chemical patterns that enable dual encoding ability to realize unclonable optical tags. This design is based on swelling-mediated massive reconstruction of an ultrathin responsive gelatinous polymer film uniformly adsorbed with plasmonic nanostructures into a randomized network of interacting folds, resulting in bright electromagnetic hotspots within the folds. We reveal a strong correlation between the topology and near-field electromagnetic field enhancement due to the intimate contact between two plasmonic surfaces within the folds, each of them representing a unique combination of local topography and chemical distribution caused by the formation of electromagnetic hotspots. Because of the efficient trapping of the Raman reporters within the uniquely distributed electromagnetic hotspots, the surface enhanced Raman scattering enhancement from the morphed plasmonic gel was found to be nearly 40 times higher compared to that from the pristine plasmonic gel. Harnessing the nondeterministic nature of the folds, the folded plasmonic gel can be employed as a multidimensional (with dual topo-chemical encoding) optical taggant for prospective anticounterfeiting applications. Such novel optical tags based on the spontaneous folding process are virtually impossible to replicate because of the combination of nondeterministic physical patterns and chemical encoding.
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Affiliation(s)
- Limei Tian
- Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
| | - Keng-Ku Liu
- Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
| | - Max Fei
- Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
| | - Sirimuvva Tadepalli
- Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
| | - Sisi Cao
- Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
| | - Jeffrey A Geldmeier
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Srikanth Singamaneni
- Department of Mechanical Engineering and Materials Science, Institute of Materials Science and Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
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15
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Panzarasa G, Aghion S, Soliveri G, Consolati G, Ferragut R. Positron annihilation spectroscopy: a new frontier for understanding nanoparticle-loaded polymer brushes. NANOTECHNOLOGY 2016; 27:02LT03. [PMID: 26630081 DOI: 10.1088/0957-4484/27/2/02lt03] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanoparticle-loaded polymer brushes are powerful tools for the development of innovative devices. However, their characterization is challenging and arrays of different techniques are typically required to gain sufficient insight. Here we demonstrate for the first time the suitability of positron annihilation spectroscopy (PAS) to investigate, with unprecedented detail and without making the least damage to samples, the physico-chemical changes experienced by pH-responsive polymer brushes after protonation and after loading of silver nanoparticles. One of the most important findings is the depth profiling of silver nanoparticles inside the brushes. These results open up a completely new way to understand the structure and behavior of such complex systems.
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Affiliation(s)
- Guido Panzarasa
- Department of Science and Technological Innovation, Università del Piemonte Orientale 'Amedeo Avogadro', viale T. Michel 11, 15100 Alessandria, Italy
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16
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Nie G, Li G, Wang L, Zhang X. Nanocomposites of polymer brush and inorganic nanoparticles: preparation, characterization and application. Polym Chem 2016. [DOI: 10.1039/c5py01333j] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We tackle in this review the use of a subset of polymer brushes (e.g., polyelectrolytes and polyampholytes) for the embedment of inorganic NPs to make composite surfaces/NPs with specific functions.
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Affiliation(s)
- Genkuo Nie
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Collaborative Innovative Center of Chemical Science and Engineering (Tianjin)
- Tianjin University
- Tianjin 300072
| | - Guozhu Li
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Collaborative Innovative Center of Chemical Science and Engineering (Tianjin)
- Tianjin University
- Tianjin 300072
| | - Li Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Collaborative Innovative Center of Chemical Science and Engineering (Tianjin)
- Tianjin University
- Tianjin 300072
| | - Xiangwen Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Collaborative Innovative Center of Chemical Science and Engineering (Tianjin)
- Tianjin University
- Tianjin 300072
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17
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Zhang Y, Pal S, Srinivasan B, Vo T, Kumar S, Gang O. Selective transformations between nanoparticle superlattices via the reprogramming of DNA-mediated interactions. NATURE MATERIALS 2015; 14:840-7. [PMID: 26006003 DOI: 10.1038/nmat4296] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 04/16/2015] [Indexed: 05/12/2023]
Abstract
The rapid development of self-assembly approaches has enabled the creation of materials with desired organization of nanoscale components. However, achieving dynamic control, wherein the system can be transformed on demand into multiple entirely different states, is typically absent in atomic and molecular systems and has remained elusive in designed nanoparticle systems. Here, we demonstrate with in situ small-angle X-ray scattering that, by using DNA strands as inputs, the structure of a three-dimensional lattice of DNA-coated nanoparticles can be switched from an initial 'mother' phase into one of multiple 'daughter' phases. The introduction of different types of reprogramming DNA strands modifies the DNA shells of the nanoparticles within the superlattice, thereby shifting interparticle interactions to drive the transformation into a particular daughter phase. Moreover, we mapped quantitatively with free-energy calculations the selective reprogramming of interactions onto the observed daughter phases.
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Affiliation(s)
- Yugang Zhang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Suchetan Pal
- 1] Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA [2] Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Babji Srinivasan
- Department of Chemical Engineering, Indian Institute of Technology Gandhinagar, Ahmedabad 682525, India
| | - Thi Vo
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Sanat Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Oleg Gang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
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Yenice Z, Schön S, Bildirir H, Genzer J, von Klitzing R. Thermoresponsive PDMAEMA Brushes: Effect of Gold Nanoparticle Deposition. J Phys Chem B 2015; 119:10348-58. [DOI: 10.1021/acs.jpcb.5b04757] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Jan Genzer
- Department
of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
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19
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Fu Z, Li T, He X, Liu J, Xu W, Wu Y. Cyclopalladated ferrocenylimine functionalized polymer brushes film and its mechanism investigation of heterogeneous catalysis. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.08.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Willet N, Gabriel S, Jérôme C, Du Prez FE, Duwez AS. Collapsing and reswelling kinetics of thermoresponsive polymers on surfaces: a matter of confinement and constraints. SOFT MATTER 2014; 10:7256-7261. [PMID: 25096016 DOI: 10.1039/c4sm01266f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the collapsing and reswelling ability of grafted poly(methyl vinyl ether) chains of different molecular architectures. In order to study the influence of constraints and confinement of the chains, the polymer was grafted onto AFM tips, as a model of a curved nano-sized surface, and onto macroscopic silicon substrates for comparison purposes. AFM-based force spectroscopy experiments were performed to characterise at the nanoscale the temperature-dependent collapsing process and the reversibility to the swollen state on both substrates. The reversible character of the thermoresponsive transition and its kinetics were shown to greatly depend on the polymer architecture and the constraints encountered by the chains.
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Affiliation(s)
- Nicolas Willet
- Nanochemistry and Molecular Systems, Department of Chemistry, University of Liège, Sart-Tilman B6a, 4000 Liège, Belgium.
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21
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Kulkarni SA, Lyles VD, Serem WK, Lu L, Kumar R, Garno JC. Solvent-responsive properties of octadecyltrichlorosiloxane nanostructures investigated using atomic force microscopy in liquid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5466-5473. [PMID: 24788214 DOI: 10.1021/la500799u] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An emerging challenge for nanoscale measurements is to capture and quantify the magnitude of structural changes in response to environmental changes. Certain environmental parameters can affect the nanoscale morphology of samples, such as changing the pH, solvent polarity, ionic strength, and temperature. We prepared test platforms of n-octadecyltrichlorosilane ring nanostructures to study surface morphology changes at the nanoscale in selected liquid media compared to dry conditions in air. Particle lithography combined with organosilane vapor deposition was used to fabricate nanostructures of regular dimensions. Multilayer nanostructures of OTS were used as a test platform for scanning probe studies of solvent-responsive properties where the sides of designed ring structures expose a 3D interface for studying the interaction of solvents with molecular side groups. In dry, ambient conditions, nanostructures of OTS were first imaged using contact mode atomic force microscopy (AFM). Next, ethanol or buffer was introduced to the sample cell, and images were acquired using the same probe. We observed substantial changes in the lateral and vertical dimensions of the ring nanostructures in AFM topography frames; the sizes of the rings were observed to swell by tens of nanometers. Even after heat treatment of samples to promote cross-linking, the samples still evidenced swelling in liquid media. This research will have consequences for studies of the properties of nanomaterials, such as solvent-responsive organic films and polymers.
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Affiliation(s)
- Shalaka A Kulkarni
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
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22
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Crulhas BP, Sempionatto JR, Cabral MF, Minko S, Pedrosa VA. Stimuli-Responsive Biointerface Based on Polymer Brushes for Glucose Detection. ELECTROANAL 2014. [DOI: 10.1002/elan.201400030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Responsive polymers for analytical applications: A review. Anal Chim Acta 2013; 789:17-32. [DOI: 10.1016/j.aca.2013.05.009] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/01/2013] [Accepted: 05/04/2013] [Indexed: 11/24/2022]
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24
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Ordering of polystyrene nanoparticles on substrates pre-coated with different polyelectrolyte architectures. Int J Mol Sci 2013; 14:12893-913. [PMID: 23787476 PMCID: PMC3709819 DOI: 10.3390/ijms140612893] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 05/15/2013] [Accepted: 05/27/2013] [Indexed: 01/31/2023] Open
Abstract
Adjusting the inter-particle distances in ordered nanoparticle arrays can create new nano-devices and is of increasing importance to a number of applications such as nanoelectronics and optical devices. The assembly of negatively charged polystyrene (PS) nanoparticles (NPs) on Poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes, quaternized PDMAEMA brushes and Si/PEI/(PSS/PAH)2, was studied using dip- and spin-coating techniques. By dip-coating, two dimensional (2-D), randomly distributed non-close packed particle arrays were assembled on Si/PEI/(PSS/PAH)2 and PDMAEMA brushes. The inter-particle repulsion leads to lateral mobility of the particles on these surfaces. The 200 nm diameter PS NPs tended to an inter-particle distance of 350 to 400 nm (center to center). On quaternized PDMAEMA brushes, the strong attractive interaction between the NPs and the brush dominated, leading to clustering of the particles on the brush surface. Particle deposition using spin-coating at low spin rates resulted in hexagonal close-packed multilayer structures on Si/PEI/(PSS/PAH)2. Close-packed assemblies with more pronounced defects are also observed on PDMAEMA brushes and QPDMAEMA brushes. In contrast, randomly distributed monolayer NP arrays were achieved at higher spin rates on all polyelectrolyte architectures. The area fraction of the particles decreased with increasing spin rate.
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25
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Toward pH-controllable bioelectrocatalysis for hydrogen peroxide based on polymer brushes. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2012.12.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Fernandes AE, Dirani A, d'Haese C, Deumer G, Guo W, Hensenne P, Nahra F, Laloyaux X, Haufroid V, Nysten B, Riant O, Jonas AM. Thicker is Better? Synthesis and Evaluation of Well-Defined Polymer Brushes with Controllable Catalytic Loadings. Chemistry 2012; 18:16226-33. [DOI: 10.1002/chem.201202531] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Indexed: 11/06/2022]
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