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Ruiz-Hitzky E, Ruiz-Garcia C. MXenes vs. clays: emerging and traditional 2D layered nanoarchitectonics. NANOSCALE 2023; 15:18959-18979. [PMID: 37937945 DOI: 10.1039/d3nr03037g] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Although MXene materials are considered an emerging research topic, they are receiving considerable interest because, like metals and graphene, they are good electronic conductors but with the particularity that they have a marked hydrophilic character. Having a structural organization and properties close to those of clay minerals (natural silicates typically with a lamellar morphology), they are sometimes referred to as "conducting clays" and exhibit colloidal, surface and intercalation properties also similar to those of clay minerals. The present contribution aims to inform and discuss the nature of MXenes in comparison with clay phyllosilicates, taking into account their structural analogies, outstanding surface properties and advanced applications. The current in-depth understanding of clay minerals may represent a basis for the future development of MXene-derived nanoarchitectures. Comparative examples of the preparation, and studies on the properties and applications of various nanoarchitectures based on clays and MXenes have been included in the present work.
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Affiliation(s)
- Eduardo Ruiz-Hitzky
- Materials Science Institute of Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
| | - Cristina Ruiz-Garcia
- Chemical Engineering Department, Faculty of Science, c/Francisco Tomás y Valiente 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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2
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Kumar C, Srivastava S. Structural and Dynamical Studies of a Lipid-Nanoclay Composite Layer at the Air-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10400-10411. [PMID: 35973133 DOI: 10.1021/acs.langmuir.2c00987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We modulate the adsorption affinities of nanoclay particles for the air-water interface by changing the cationic surface charge composition of the lipid monolayer and thereby tune the attractive electrostatic interaction between the positively charged lipid layer and the zwitterionic nanoclay particles in the water subphase. Our findings emphasize the significance of electrostatic interaction between lipids and the nanoclay, as well as its impact on the structural and viscoelastic features of the composite layer. We use surface pressure (Π)-mean molecular area (A) isotherms, atomic force microscope (AFM), Brewster angle microscopy (BAM), and energy dispersive X-ray spectrsocopy (EDXS) measurements to analyze the structure phases of lipid and lipid-nanoclay composite interfacial layer. The Π-A isotherm curve shows that the lipid-nanoclay composite layer has a larger lift-off area than the neat lipid layer, indicating that nanoparticles adsorb at the lipid layer via electrostatic interaction between lipid and nanoclay molecules. The surface density of the adsorbed nanoclay particles increases with an increase in the composition of the cationic lipid molecules. The stress relaxation response of the composite layer, measured using step compression measurements, exhibits exponential decay and ubiquitous dependence on the cationic dimyristoy-trimethylammonium propane (DMTAP) composition in the lipid layer with crossover to faster relaxation dynamics at DMTAP > 0.75. The power-law study of the frequency-dependent dynamic viscoelastic responses of the interfacial layer, measured using the barrier oscillation method, reveals a transition from glass-like response from neat lipid layer to gel-like dynamic response for the lipid-nanoclay composite layer. A solid-like behavior is evident for all the interface layers with dilation elastic modulus (E') > dilational viscous modulus (E″); however, the dynamic response of the neat layer is largely frequency-independent, whereas lipid-nanoclay composite layers with DMTAP > 0.75 reveal a frequency-dependent dynamic responses. The frequency-dependent power-law exponent of E', E″ increases on increasing the fractional composition of cationic DMTAP from 0.1 to 1.0, which forms a saturated interface of laponite particles and behaves as a viscoelastic gel in 2D.
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Affiliation(s)
- Chandan Kumar
- Soft Matter and Nanomaterials Laboratory, Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sunita Srivastava
- Soft Matter and Nanomaterials Laboratory, Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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3
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Michels-Brito PH, Malfatti-Gasperini A, Mayr L, Puentes-Martinez X, Tenório RP, Wagner DR, Knudsen KD, Araki K, Oliveira RG, Breu J, Cavalcanti LP, Fossum JO. Unmodified Clay Nanosheets at the Air-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:160-170. [PMID: 33373239 PMCID: PMC8154875 DOI: 10.1021/acs.langmuir.0c02670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 12/16/2020] [Indexed: 05/31/2023]
Abstract
Quasi-two-dimensional (2D) nanolayers, such as graphene oxide or clay layers, adhere to gas-liquid or liquid-liquid interfaces. Particularly, clays are of wide general interest in this context because of their extensive and crucial use as Pickering emulsion stabilizers, as well as for their ability to provide colloidosome capsules. So far, clays could only be localized at oil-water or air-saline-water interfaces in aggregated states, while our results now show that clay nanosheets without any modification can be located at air-deionized-water interfaces. The clay mineral used in the present work is synthetic fluorohectorite with a very high aspect ratio and superior quality in homogeneity and charge distribution compared to other clay minerals. This clay mineral is more suitable for achieving unmodified clay anchoring to fluid interfaces compared to other clay minerals used in previous works. In this context, we studied clay nanosheet organization at the air-water interface by combining different experimental methods: Langmuir-Blodgett trough studies, scanning electron microscopy (SEM) studies of film deposits, grazing-incidence X-ray off-specular scattering (GIXOS), and Brewster angle microscopy (BAM). Clay films formed at the air-water interface could be transferred to solid substrates by the Langmuir-Schaefer method. The BAM results indicate a dynamic equilibrium between clay sheets on the interface and in the subphase. Because of this dynamic equilibrium, the Langmuir monolayer surface pressure does not change significantly when pure clay sheets are spread on the liquid surface. However, also, GIXOS results confirm that there are clay nanosheets at the air-water interface. In addition, we find that clay sheets modified by a branched polymer are much more likely to be confined to the interface.
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Affiliation(s)
- Paulo H. Michels-Brito
- Department
of Physics, Norwegian University of Science
and Technology, NTNU, 7491 Trondheim, Norway
| | - Antonio Malfatti-Gasperini
- Brazilian
Synchrotron Light Laboratory, LNLS, Brazilian
Center for Research in Energy and Materials, CNPEM, Campinas 13083-970, Brazil
| | - Lina Mayr
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | | | - Rômulo P. Tenório
- Northeast
Regional Center of Nuclear Sciences, Recife 50740-545,Brazil
| | - Daniel R. Wagner
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | - Kenneth D. Knudsen
- Department
of Physics, Norwegian University of Science
and Technology, NTNU, 7491 Trondheim, Norway
- Institute
for Energy Technology, IFE, Kjeller 2027, Norway
| | - Koiti Araki
- Department
of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, USP, São Paulo 05513-970, Brazil
| | - Rafael G. Oliveira
- Centro
de Investigaciones en Química Biológica de Córdoba
(CIQUIBIC)-Departamento de Química Biológica Dr. Ranwel
Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
| | - Josef Breu
- Bavarian
Polymer Institute and Department of Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
| | | | - Jon Otto Fossum
- Department
of Physics, Norwegian University of Science
and Technology, NTNU, 7491 Trondheim, Norway
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Fossum JO. Clay nanolayer encapsulation, evolving from origins of life to future technologies. THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS 2020; 229:2863-2879. [PMID: 33224440 PMCID: PMC7666717 DOI: 10.1140/epjst/e2020-000131-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/06/2020] [Indexed: 05/31/2023]
Abstract
Clays are the siblings of graphite and graphene/graphene-oxide. There are two basic ways of using clays for encapsulation of sub-micron entities such as molecules, droplets, or nanoparticles, which is either by encapsulation in the interlayer space of clay nanolayered stacked particles ("the graphite way"), or by using exfoliated clay nanolayers to wrap entities in packages ("the graphene way"). Clays maybe the prerequisites for life on earth and can also be linked to the natural formation of other two-dimensional materials such as naturally occurring graphite and its allotropes. Here we discuss state-of-the-art in the area of clay-based encapsulation and point to some future scientific directions and technological possibilities that could emerge from research in this area.
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Affiliation(s)
- Jon Otto Fossum
- Laboratory for Soft and Complex Matter Studies, Department of Physics, Norwegian University of Science and Technology – NTNU, Trondheim, Norway
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Daab M, Eichstaedt NJ, Habel C, Rosenfeldt S, Kalo H, Schießling H, Förster S, Breu J. Onset of Osmotic Swelling in Highly Charged Clay Minerals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8215-8222. [PMID: 29924623 DOI: 10.1021/acs.langmuir.8b00492] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Delamination by osmotic swelling of layered materials is generally thought to become increasingly difficult, if not impossible, with increasing layer charge density because of strong Coulomb interactions. Nevertheless, for the class of 2:1 layered silicates, very few examples of delaminating organo-vermiculites were reported in literature. We propose a mechanism for this repulsive osmotic swelling of highly charged vermiculites based on repulsive counterion translational entropy that dominates the interaction of adjacent layers above a certain threshold separation. Based on this mechanistic insight, we were able to identify several organic interlayer cations appropriate to delaminate highly charged, vermiculite-type clay minerals. These findings suggest that the osmotic swelling of highly charged organoclays is a generally applicable phenomenon rather than the odd exemption.
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Affiliation(s)
- Matthias Daab
- Bavarian Polymerinstitute and Department of Chemistry , University of Bayreuth , D-95440 Bayreuth , Germany
| | - Natalie J Eichstaedt
- Bavarian Polymerinstitute and Department of Chemistry , University of Bayreuth , D-95440 Bayreuth , Germany
| | - Christoph Habel
- Bavarian Polymerinstitute and Department of Chemistry , University of Bayreuth , D-95440 Bayreuth , Germany
| | - Sabine Rosenfeldt
- Bavarian Polymerinstitute and Department of Chemistry , University of Bayreuth , D-95440 Bayreuth , Germany
| | | | | | - Stephan Förster
- Forschungszentrum Jülich , Institute of Complex Systems (ICS-1) , D-52425 Jülich , Germany
| | - Josef Breu
- Bavarian Polymerinstitute and Department of Chemistry , University of Bayreuth , D-95440 Bayreuth , Germany
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Mikkelsen A, Rozynek Z, Khobaib K, Dommersnes P, Fossum JO. Transient deformation dynamics of particle laden droplets in electric field. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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