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Jańczuk ZZ, Jedrych A, Parzyszek S, Gardias A, Szczytko J, Wojcik M. Dynamically Tunable Assemblies of Superparamagnetic Nanoparticles Stabilized with Liquid Crystal-like Ligands in Organic Thin Films. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2908. [PMID: 37947752 PMCID: PMC10648093 DOI: 10.3390/nano13212908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/29/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023]
Abstract
The process of arranging magnetic nanoparticles (MNPs) into long-range structures that can be dynamically and reversibly controlled is challenging, although interesting for emerging spintronic applications. Here, we report composites of MNPs in excess of LC-like ligands as promising materials for MNP-based technologies. The organic part ensures the assembly of MNP into long-range ordered phases as well as precise and temperature-reversible control over the arrangement. The dynamic changes are fully reversible, which we confirm using X-ray diffraction (XRD). This methodology allows for the precise control of the nanomaterial's structure in a thin film at different temperatures, translating to variable unit cell parameters. The composition of the materials (XPS, TGA), their structure (XRD), and magnetic properties (SQUID) were performed. Overall, this study confirms that LC-like materials provide the ability to dynamically control the magnetic nanoparticles in thin films, particularly the reversible control of their self-organization.
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Affiliation(s)
- Zuzanna Z. Jańczuk
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
| | - Agnieszka Jedrych
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
| | - Sylwia Parzyszek
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
| | - Anita Gardias
- Faculty of Physics, University of Warsaw, 5 Pasteur Street, 02-093 Warsaw, Poland; (A.G.); (J.S.)
| | - Jacek Szczytko
- Faculty of Physics, University of Warsaw, 5 Pasteur Street, 02-093 Warsaw, Poland; (A.G.); (J.S.)
| | - Michal Wojcik
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
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2
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Jedrych A, Pawlak M, Gorecka E, Lewandowski W, Wojcik MM. Light-Responsive Supramolecular Nanotubes-Based Chiral Plasmonic Assemblies. ACS NANO 2023; 17:5548-5560. [PMID: 36897199 PMCID: PMC10062029 DOI: 10.1021/acsnano.2c10955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
We describe the fabrication of dual-responsive (thermo/light) chiral plasmonic films. The idea is based on using photoswitchable achiral liquid crystal (LCs) forming chiral nanotubes for templating helical assemblies of Au NPs. Circular dichroism spectroscopy (CD) confirms chiroptical properties coming from the arrangement of organic and inorganic components, with up to 0.2 dissymmetry factor (g-factor). Upon exposure to UV light, organic molecules isomerize, resulting in controlled melting of organic nanotubes and/or inorganic nanohelices. The process can be reversed using visible light and further modified by varying the temperature, offering a control of chiroptical response of the composite material. These properties can play a key role in the future development of chiral plasmonics, metamaterials, and optoelectronic devices.
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Zhao YY, Li Y, Cao Y, Mehl GH, Liu F, Ungar G. The Effect of Mesogenic Coronas on the Type and Anisotropy of Gold Nanoparticle Superlattices: When Can the Tail Wag the Dog? Chemistry 2023; 29:e202203673. [PMID: 36573704 DOI: 10.1002/chem.202203673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Indexed: 12/28/2022]
Abstract
The correlation between the size of nanoparticles, the structure and shape of mesogenic ligands and the ensuing assembly behaviour is not really understood. Closer inspection shows very surprising features. Here, 2- and 4-nm gold nanoparticles (NPs) were synthesized, and grafted with a forked ligand containing two rod-like mesogens in its branches: one cholesterol, the other with azobenzene. The 4-nm NPs also contained n-hexylthiol as co-ligand. They were found to form a FCC cubic superlattice, whereas the 2-nm NPs form hexagonal HCP with weak birefringence, hence with partially oriented ligands. The structures were compared with those of related systems containing a range of different azobenzene-to-cholesterol ratios, all giving body-centred tetragonal superlattices with various degrees of anisotropy. Geometric analysis is presented in terms of the asphericity of the NPs' surroundings, requirement for space-filling and structural anisotropy. Some general rules are derived to help design the soft corona around the NPs in order to obtain superlattices with the desired structure and anisotropy.
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Affiliation(s)
- Yang-Yang Zhao
- Shaanxi International Research Center for Soft Matter, State Key Laboratory for Mechanical Behaviour of Materials, Xi'an Jiaotong University, Xi An Shi, Xi'an, 710049, P. R. China
| | - Yaxin Li
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, 450001, P. R. China
| | - Yu Cao
- Shaanxi International Research Center for Soft Matter, State Key Laboratory for Mechanical Behaviour of Materials, Xi'an Jiaotong University, Xi An Shi, Xi'an, 710049, P. R. China
| | - Georg H Mehl
- Shaanxi International Research Center for Soft Matter, State Key Laboratory for Mechanical Behaviour of Materials, Xi'an Jiaotong University, Xi An Shi, Xi'an, 710049, P. R. China.,Department of Chemistry, University of Hull, Hull, HU6 7RX, UK
| | - Feng Liu
- Shaanxi International Research Center for Soft Matter, State Key Laboratory for Mechanical Behaviour of Materials, Xi'an Jiaotong University, Xi An Shi, Xi'an, 710049, P. R. China
| | - Goran Ungar
- Shaanxi International Research Center for Soft Matter, State Key Laboratory for Mechanical Behaviour of Materials, Xi'an Jiaotong University, Xi An Shi, Xi'an, 710049, P. R. China.,Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK
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Kumaranchira Ramankutty K, Buergi T. Analytical separation techniques: toward achieving atomic precision in nanomaterials science. NANOSCALE 2022; 14:16415-16426. [PMID: 36326280 PMCID: PMC9671142 DOI: 10.1039/d2nr04595h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
The size- and shape-dependence of the properties are the most characteristic features of nanoscale matter. In many types of nanomaterials, there is a size regime wherein every atom counts. In order to fully realize the idea of 'maneuvering things atom by atom' envisioned by Richard Feynman, synthesis and separation of nanoscale matter with atomic precision are essential. It is therefore not surprising that analytical separation techniques have contributed tremendously toward understanding the size- as well as shape-dependent properties of nanomaterials. Fascinating properties of nanomaterials would not have been explored without the use of these techniques. Here we discuss the pivotal role of analytical separation techniques in the progress of nanomaterials science. We begin with a brief overview of some of the key analytical separation techniques that are of tremendous importance in nanomaterials research. Then we describe how each of these techniques has contributed to the advancements in nanomaterials science taking some of the nanosystems as examples. We discuss the limitations and challenges of these techniques and future perspectives.
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Affiliation(s)
| | - Thomas Buergi
- Department of Physical Chemistry, University of Geneva, 1211 Geneva 4, Switzerland.
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Pedrazo-Tardajos A, Arslan Irmak E, Kumar V, Sánchez-Iglesias A, Chen Q, Wirix M, Freitag B, Albrecht W, Van Aert S, Liz-Marzán LM, Bals S. Thermal Activation of Gold Atom Diffusion in Au@Pt Nanorods. ACS NANO 2022; 16:9608-9619. [PMID: 35687880 DOI: 10.1021/acsnano.2c02889] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Understanding the thermal stability of bimetallic nanoparticles is of vital importance to preserve their functionalities during their use in a variety of applications. In contrast to well-studied bimetallic systems such as Au@Ag, heat-induced morphological and compositional changes in Au@Pt nanoparticles are insufficiently understood, even though Au@Pt is an important material for catalysis. To investigate the thermal instability of Au@Pt nanorods at temperatures below their bulk melting point, we combined in situ heating with two- and three-dimensional electron microscopy techniques, including three-dimensional energy-dispersive X-ray spectroscopy. The experimental results were used as input for molecular dynamics simulations, to unravel the mechanisms behind the morphological transformation of Au@Pt core-shell nanorods. We conclude that thermal stability is influenced not only by the degree of coverage of Pt on Au but also by structural details of the Pt shell.
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Affiliation(s)
- Adrián Pedrazo-Tardajos
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Ece Arslan Irmak
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Vished Kumar
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastián, Spain
| | - Ana Sánchez-Iglesias
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastián, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER- BBN), 20014 Donostia-San Sebastián, Spain
| | - Qiongyang Chen
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Maarten Wirix
- Thermo Fisher Scientific, Strijp-T, Zwaanstraat 31G, 5651 Eindhoven, The Netherlands
| | - Bert Freitag
- Thermo Fisher Scientific, Strijp-T, Zwaanstraat 31G, 5651 Eindhoven, The Netherlands
| | - Wiebke Albrecht
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Sandra Van Aert
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Luis M Liz-Marzán
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER- BBN), 20014 Donostia-San Sebastián, Spain
| | - Sara Bals
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
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Zhao YY, Cao Y, Siligardi G, Mehl GH, Liu F, Ungar G. Self-assembly of gold nanoparticles into an adjustable plasmonic 3D lattice using Janus-type forked mesogenic ligands. Chem Asian J 2022; 17:e202200057. [PMID: 35192226 DOI: 10.1002/asia.202200057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/21/2022] [Indexed: 11/06/2022]
Abstract
We report the formation of a 3D body-centred self-assembled superlattice of gold nanoparticles whose interparticle gap, and hence its plasmonic properties, are adjustable exclusively in the xy -plane. Thus, even though the particles are spherical, their anisotropic packing generates tailorable plasmonic dichroism. The gold nanoparticles are coated with forked ligands containing two mesogens: either two cholesterols ("twin"), one cholesterol and one azobenzene ("Janus"), or a mixture of the two. Beside the body-centered arrangement of gold nanoparticles, the structure also contains unusual two-dimensionally modulated smectic-like layers of mesogens in an egg-box geometry. Moreover, the presence of azobenzene mesogens allows the superlattice to be melted through UV-induced photo-isomerization; the process is reversible displaying low fatigue on repeated cycling.
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Affiliation(s)
- Yang-Yang Zhao
- Xi'an Jiaotong University, Department of Chemistry, School of Science, West Xianning Road, 710049, Xi'an, CHINA
| | - Yu Cao
- Xi'an Jiaotong University, Department of Chemistry, School of Science, CHINA
| | | | - Georg H Mehl
- University of Hull, Department of Chemistry, UNITED KINGDOM
| | - Feng Liu
- Xi'an Jiaotong University, Department of Chemistry, School of Science, CHINA
| | - Goran Ungar
- University of Sheffield, Materials Science and Engineering, Sir Robert Hadfield Building, Mappin Street, S1 3JD, Sheffield, UNITED KINGDOM
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Szustakiewicz P, Kowalska N, Bagiński M, Lewandowski W. Active Plasmonics with Responsive, Binary Assemblies of Gold Nanorods and Nanospheres. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2296. [PMID: 34578613 PMCID: PMC8465109 DOI: 10.3390/nano11092296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/22/2021] [Accepted: 08/29/2021] [Indexed: 12/13/2022]
Abstract
Self-assembly of metal nanoparticles has applications in the fabrication of optically active materials. Here, we introduce a facile strategy for the fabrication of films of binary nanoparticle assemblies. Dynamic control over the configuration of gold nanorods and nanospheres is achieved via the melting of bound and unbound fractions of liquid-crystal-like nanoparticle ligands. This approach provides a route for the preparation of hierarchical nanoparticle superstructures with applications in reversibly switchable, visible-range plasmonic technologies.
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Affiliation(s)
| | | | | | - Wiktor Lewandowski
- Faculty of Chemistry, University of Warsaw, 1 Pasteura St., 02-093 Warsaw, Poland; (P.S.); (N.K.); (M.B.)
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Bunje H, Li Y, Liz-Marzán LM, Millstone JE, Nie G, Shmakov SN, Weiss PS. Putting the World Back Together and Announcing the 2021 ACS Nano Award Lecture Laureates. ACS NANO 2021; 15:7837-7839. [PMID: 34034424 DOI: 10.1021/acsnano.1c04048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
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