1
|
Lux C, Kerz S, Ribeiro CC, Bareuther J, Lützenkirchen J, Stock S, Tsintsaris M, Rehahn M, Stark RW, von Klitzing R. Conceptualizing flexible papers using cellulose model surfaces and polymer particles. SOFT MATTER 2024; 20:1333-1346. [PMID: 38251414 DOI: 10.1039/d3sm01461d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Cellulose, as a naturally abundant and biocompatible material, is still gaining interest due to its high potential for functionalization. This makes cellulose a promising candidate for replacing plastics. Understanding how cellulose interacts with various additives is crucial for creating composite materials with diverse properties, as it is the case for plastics. In addition, the mechanical properties of the composite materials are assumed to be related to the mobility of the additives against the cellulose. Using a well-defined cellulose model surface (CMS), we aim to understand the adsorption and desorption of two polymeric particles (core-shell particles and microgels) to/from the cellulose surface. The nanomechanics of particles and CMS are quantified by indentation measurements with an atomic force microscope (AFM). AFM topography measurements quantified particle adsorption and desorption on the CMS, while peak force AFM measurements determined the force needed to move individual particles. Both particles and the CMS exhibited pH-dependent charge behavior, allowing a tunable interaction between them. Particle adsorption was irreversible and driven by electrostatic forces. In contrast, desorption and particle mobility forces are dominated by structural morphology. In addition, we found that an annealing procedure consisting of swelling/drying cycles significantly increased the adhesion strength of both particles. Using the data, we achieve a deeper understanding of the interaction of cellulose with polymeric particles, with the potential to advance the development of functional materials and contribute to various fields, including smart packaging, sensors, and biomedical applications.
Collapse
Affiliation(s)
- Cassia Lux
- Soft Matter at Interfaces, Department of Physics, 64289 Darmstadt, Germany.
| | - Sabrina Kerz
- Soft Matter at Interfaces, Department of Physics, 64289 Darmstadt, Germany.
| | - Catarina C Ribeiro
- Physics of Surfaces, Department of Material Science, 64287 Darmstadt, Germany
| | - Jennifer Bareuther
- Macromolecular Chemistry: Chemistry of Polymers, Department of Chemistry, 64287 Darmstadt, Germany
| | - Johannes Lützenkirchen
- Institute for Nuclear Disposal, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - Sebastian Stock
- Soft Matter at Interfaces, Department of Physics, 64289 Darmstadt, Germany.
| | | | - Matthias Rehahn
- Macromolecular Chemistry: Chemistry of Polymers, Department of Chemistry, 64287 Darmstadt, Germany
| | - Robert W Stark
- Physics of Surfaces, Department of Material Science, 64287 Darmstadt, Germany
| | | |
Collapse
|
2
|
Gröger R, Heiler T, Schimmel T, Walheim S. Tip-Induced Nanopatterning of Ultrathin Polymer Brushes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2204962. [PMID: 37026430 DOI: 10.1002/smll.202204962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 02/02/2023] [Indexed: 06/19/2023]
Abstract
Patterned, ultra-thin surface layers can serve as templates for positioning nanoparticlesor targeted self-assembly of molecular structures, for example, block-copolymers. This work investigates the high-resolution, atomic force microscopebased patterning of 2 nm thick vinyl-terminated polystyrene brush layers and evaluates the line broadening due to tip degradation. This work compares the patterning properties with those of a silane-based fluorinated self-assembled monolayer (SAM), using molecular heteropatterns generated by modified polymer blend lithography (brush/SAM-PBL). Stable line widths of 20 nm (FWHM) over lengths of over 20000 µm indicate greatly reduced tip wear, compared to expectations on uncoated SiOx surfaces. The polymer brush acts as a molecularly thin lubricating layer, thus enabling a 5000 fold increase in tip lifetime, and the brush is bonded weakly enough that it can be removed with surgical accuracy. On traditionally used SAMs, either the tip wear is very high or the molecules are not completely removed. Polymer Phase Amplified Brush Editing is presented, which uses directed self-assembly to amplify the aspect ratio of the molecular structures by a factor of 4. The structures thus amplified allow transfer into silicon/metal heterostructures, fabricating 30 nm deep, all-silicon diffraction gratings that could withstand focused high-power 405 nm laser irradiation.
Collapse
Affiliation(s)
- Roland Gröger
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131, Karlsruhe, Germany
- Center for Single-Atom Technologies (C.SAT), Karlsruhe Institute of Technology, Strasse am Forum 7, D-76131, Karlsruhe, Germany
| | - Tobias Heiler
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131, Karlsruhe, Germany
| | - Thomas Schimmel
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131, Karlsruhe, Germany
- Center for Single-Atom Technologies (C.SAT), Karlsruhe Institute of Technology, Strasse am Forum 7, D-76131, Karlsruhe, Germany
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology, Herrmann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany
- Materials Research Center for Energy Systems (MZE), Karlsruhe Institute of Technology, Strasse am Forum 7, D-76131, Karlsruhe, Germany
| | - Stefan Walheim
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131, Karlsruhe, Germany
- Center for Single-Atom Technologies (C.SAT), Karlsruhe Institute of Technology, Strasse am Forum 7, D-76131, Karlsruhe, Germany
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology, Herrmann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany
| |
Collapse
|
3
|
Bolarinwa H, Onuu M, Fasasi A, Alayande S, Animasahun L, Abdulsalami I, Fadodun O, Egunjobi I. Determination of optical parameters of zinc oxide nanofibre deposited by electrospinning technique. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2017.01.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- H.S. Bolarinwa
- Department of Physics, Electronics and Earth Sciences,Fountain University, Osogbo, Nigeria
- Department of Physics, University of Calabar, Calabar, Nigeria
| | - M.U. Onuu
- Department of Physics, University of Calabar, Calabar, Nigeria
- Department of Physics/Geology/Geophysics, Federal University Ndufu, Aliko, Ikwo, Nigeria
| | - A.Y. Fasasi
- Centre for Energy Research and Development, Obafemi Awolowo University, Nigeria
| | - S.O. Alayande
- Centre for Energy Research and Development, Obafemi Awolowo University, Nigeria
| | - L.O. Animasahun
- Department of Physics, Electronics and Earth Sciences,Fountain University, Osogbo, Nigeria
| | - I.O. Abdulsalami
- Department of Chemical Sciences, Fountain University, Osogbo, Nigeria
| | - O.G. Fadodun
- Centre for Energy Research and Development, Obafemi Awolowo University, Nigeria
| | - I.A. Egunjobi
- Department of Science Laboratory Technology, MAPOLY, Abeokuta, Nigeria
| |
Collapse
|
4
|
The pH dependent surface charging and points of zero charge. VII. Update. Adv Colloid Interface Sci 2018; 251:115-138. [PMID: 29153243 DOI: 10.1016/j.cis.2017.10.005] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 10/25/2017] [Accepted: 10/25/2017] [Indexed: 02/06/2023]
Abstract
The pristine points of zero charge (PZC) and isoelectric points (IEP) of metal oxides and IEP of other materials from the recent literature, and a few older results (overlooked in previous searches) are summarized. This study is an update of the previous compilations by the same author [Surface Charging and Points of Zero Charge, CRC, Boca Raton, 2009; J. Colloid Interface Sci. 337 (2009) 439; 353 (2011) 1; 426 (2014) 209]. The field has been very active, but most PZC and IEP are reported for materials, which are very well-documented already (silica, alumina, titania, iron oxides). IEP of (nominally) Gd2O3, NaTaO3, and SrTiO3 have been reported in the recent literature. Their IEP were not reported in older studies.
Collapse
|
5
|
Fiedot M, Maliszewska I, Rac-Rumijowska O, Suchorska-Woźniak P, Lewińska A, Teterycz H. The Relationship between the Mechanism of Zinc Oxide Crystallization and Its Antimicrobial Properties for the Surface Modification of Surgical Meshes. MATERIALS 2017; 10:ma10040353. [PMID: 28772718 PMCID: PMC5506934 DOI: 10.3390/ma10040353] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/07/2017] [Accepted: 03/22/2017] [Indexed: 11/16/2022]
Abstract
Surgical meshes were modified with zinc oxide (ZnO) using a chemical bath deposition method (CBD) at 50 °C, 70 °C, or 90 °C, in order to biologically activate them. Scanning electron microscopy (SEM), mass changes, and X-ray diffraction measurements revealed that at low temperatures Zn(OH)2 was formed, and that this was converted into ZnO with a temperature increase. The antimicrobial activity without light stimulation of the ZnO modified Mersilene™ meshes was related to the species of microorganism, the incubation time, and the conditions of the experiment. Generally, cocci (S. aureus, S. epidermidis) and yeast (C. albicans) were more sensitive than Gram-negative rods (E. coli). The differences in sensitivity of the studied microorganisms to ZnO were discussed. The most active sample was that obtained at 90 °C. The mechanism of antimicrobial action of ZnO was determined by various techniques, such as zeta potential analysis, electron paramagnetic resonance (EPR) spectroscopy, SEM studies, and measurements of Zn(II) and reactive oxygen species (ROS) concentration. Our results confirmed that the generation of free radicals was crucial, which occurs on the surface of crystalline ZnO.
Collapse
Affiliation(s)
- Marta Fiedot
- Faculty of Microsystem Electronics and Photonics, Wroclaw University of Science and Technology, Janiszewskiego 11/17, 50-372 Wroclaw, Poland.
| | - Irena Maliszewska
- Faculty of Chemistry, Wroclaw University of Science and Technology, C.K. Norwida 4/6, 50-373 Wroclaw, Poland.
| | - Olga Rac-Rumijowska
- Faculty of Microsystem Electronics and Photonics, Wroclaw University of Science and Technology, Janiszewskiego 11/17, 50-372 Wroclaw, Poland.
| | - Patrycja Suchorska-Woźniak
- Faculty of Microsystem Electronics and Photonics, Wroclaw University of Science and Technology, Janiszewskiego 11/17, 50-372 Wroclaw, Poland.
| | - Agnieszka Lewińska
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Helena Teterycz
- Faculty of Microsystem Electronics and Photonics, Wroclaw University of Science and Technology, Janiszewskiego 11/17, 50-372 Wroclaw, Poland.
| |
Collapse
|
6
|
Blumenstein NJ, Streb F, Walheim S, Schimmel T, Burghard Z, Bill J. Template-controlled piezoactivity of ZnO thin films grown via a bioinspired approach. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:296-303. [PMID: 28243568 PMCID: PMC5301953 DOI: 10.3762/bjnano.8.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 01/08/2017] [Indexed: 05/09/2023]
Abstract
Biomaterials are used as model systems for the deposition of functional inorganic materials under mild reaction conditions where organic templates direct the deposition process. In this study, this principle was adapted for the formation of piezoelectric ZnO thin films. The influence of two different organic templates (namely, a carboxylate-terminated self-assembled monolayer and a sulfonate-terminated polyelectrolyte multilayer) on the deposition and therefore on the piezoelectric performance was investigated. While the low negative charge of the COOH-SAM is not able to support oriented attachment of the particles, the strongly negatively charged sulfonated polyelectrolyte leads to texturing of the ZnO film. This texture enables a piezoelectric performance of the material which was measured by piezoresponse force microscopy. This study shows that it is possible to tune the piezoelectric properties of ZnO by applying templates with different functionalities.
Collapse
Affiliation(s)
- Nina J Blumenstein
- Institute for Materials Science, University of Stuttgart, Heisenbergstraße 3, Stuttgart, D-70569, Germany
| | - Fabian Streb
- Institute for Materials Science, University of Stuttgart, Heisenbergstraße 3, Stuttgart, D-70569, Germany
| | - Stefan Walheim
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, D-76344, Germany
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, Karlsruhe, D-76131, Germany
| | - Thomas Schimmel
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, D-76344, Germany
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, Karlsruhe, D-76131, Germany
| | - Zaklina Burghard
- Institute for Materials Science, University of Stuttgart, Heisenbergstraße 3, Stuttgart, D-70569, Germany
| | - Joachim Bill
- Institute for Materials Science, University of Stuttgart, Heisenbergstraße 3, Stuttgart, D-70569, Germany
| |
Collapse
|