Constructing a library of metal and metal–oxide nanoparticle heterodimers through colloidal assembly

Gschneidtner, Tina; Lerch, Sarah; Olsén, Erik; Wen, Xin; Liu, Amelia C. Y.; Stolaś, Alicja; Etheridge, Joanne; Olsson, Eva; Moth‐Poulsen, Kasper

doi:10.1039/d0nr02787a

Cited by 7 publications

(7 citation statements)

References 86 publications

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“…[45,46] Incoherent CL, usually generated by electron-hole recombination, has been used to examine strain, defects, and inter-band transitions in nanoscale semiconductors. [47] Coherent CL, so-called because the emitted radiation has a constant phase relation with the electric field of the incoming electron, has mapped localized surface plasmon (LSP) resonances in coupled plasmonic systems produced by various methods, including chemical growth and electrostatic assembly, [48,49] electron beam lithography, [50,51] and ion beam milling. [52,53] Simulations are performed in COMSOL Multiphysics to gain insight into the CL measurements.…”

Section: Cathodoluminescencementioning

confidence: 99%

Algorithm‐Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Cadusch

Liu

et al. 2021

Advanced Optical Materials

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to be performed over extended periods and potentially forming the foundation for a nanoscale assembly tool. The optical trapping of nanoparticles faces the challenge however that the gradient force varies approximately with the nanoparticle volume. [6][7][8] This means, for example, that reducing the nanoparticle radius by a factor of ten reduces the gradient force by a factor of one thousand. As the name suggests, this force also varies with the gradient of the intensity. One can therefore boost the gradient force by concentrating light as tightly as possible at the trapping site. Conventional optical tweezers however use lenses to focus light and are thus subject to the diffraction limit. This sets a limit on the gradient force on a given nanoparticle that can be obtained with a given laser power with conventional optical tweezers. [9] Optical nanostructures enable optical fields to be concentrated into deeply-sub wavelength regions, thereby presenting a means to surpass the performance of traditional optical tweezers for the trapping of nanoparticles. Optical tweezers based on nanostructures are sometimes known as optical nanotweezers. Plasmonic apertures have proven highly effective, [10][11][12][13][14][15][16][17] with the enhanced fields inside the apertures producing strong gradient forces. [18] The presence of heating is an Plasmonic apertures permit optical fields to be concentrated into subwavelength regions. This enhances the optical gradient force, enabling the precise trapping of nanomaterials such as quantum dots, proteins, and DNA molecules at modest laser powers. Double nanoholes, coaxial apertures, bowtie apertures, and other structures have been studied as plasmonic nanotweezers, with the design process generally comprising intuition followed by electromagnetic simulations with parameter sweeps. Here, instead, a computational algorithm is used to design plasmonic apertures for nanoparticle trapping. The resultant apertures have highly irregular shapes that, in combination with ring couplers also optimized by algorithm, are predicted to generate trapping forces more than an order of magnitude greater than those from the double nanohole design used as the optimization starting point. The designs are realized by fabricating precision apertures with a helium/neon ion microscope and are studied them by cathodoluminescence and optical trapping. It is shown that, at every laser intensity, the algorithm-designed apertures can trap particles more tightly than the double nanohole.

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Section: Cathodoluminescencementioning

confidence: 99%

Algorithm‐Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Cadusch

Liu

et al. 2021

Advanced Optical Materials

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“…This could be attributed to the assembly of citrate ions and amino acid molecules to the metal-oxide surface due to their strong adhesion at high synthesis temperatures. 34 Notably, Fe 3 O 4 −Ala displayed negligible nitrogen on the surface (∼0.5 at %), which may be due to the degradation of amino acid molecules at high temperatures and weak covalent interaction of amine groups to the surface. Comparatively, Fe and O were the only elements on the surface of Fe 3 O 4 −Conv, confirming the modified structure of Fe 3 O 4 −Ala.…”

Section: Resultsmentioning

confidence: 99%

“…The exterior surface of Fe 3 O 4 –Ala was further analyzed by XPS characterization, which showed the presence of carbon (∼29.2 at %) on the exterior surface of Fe 3 O 4 –Ala (Figure d; see also Figure S6). This could be attributed to the assembly of citrate ions and amino acid molecules to the metal-oxide surface due to their strong adhesion at high synthesis temperatures . Notably, Fe 3 O 4 –Ala displayed negligible nitrogen on the surface (∼0.5 at %), which may be due to the degradation of amino acid molecules at high temperatures and weak covalent interaction of amine groups to the surface.…”

Section: Resultsmentioning

confidence: 99%

Water-Dispersible Nanocatalysts with Engineered Structures: The New Generation of Nanomaterials for Energy-Efficient CO₂ Capture

Alivand

Mazaheri

et al. 2021

ACS Appl. Mater. Interfaces

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The high energy demand of CO2 absorption–desorption technologies has significantly inhibited their industrial utilization and implementation of the Paris Climate Accord. Catalytic solvent regeneration is of considerable interest due to its low operating temperature and high energy efficiency. Of the catalysts available, heterogeneous catalysts have exhibited relatively poor performances and are hindered by other challenges, which have slowed their large-scale deployment. Herein, we report a facile and eco-friendly approach for synthesizing water-dispersible Fe3O4 nanocatalysts coated with a wide range of amino acids (12 representative molecules) in aqueous media. The acidic properties of water-dispersible nanocatalysts can be easily tuned by introducing different functional groups during the hydrothermal synthesis procedure. We demonstrate that the prepared nanocatalysts can be used in energy-efficient CO2 capture plants with ease-of-use, at very low concentrations (0.1 wt %) and with extra-high efficiencies (up to ∼75% energy reductions). They can be applied in a range of solutions, including amino acids (i.e., short-chain, long-chain, and cyclic) and amines (i.e., primary, tertiary, and primary-tertiary mixture). Considering the superiority of the presented water-dispersible nanocatalysts, this technology is expected to provide a new pathway for the development of energy-efficient CO2 capture technologies.

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“…Many colloidal techniques, including seed-mediated growth, 12 ligand-mediated self-assembly, 13 and electrostatic assembly 14 can be used to create NP heterostructures. In seed-mediated growth, a new material domain can grow at a specific site of a pre-existing NP, whereas assembly approaches connect preformed NPs together.…”

Section: Introductionmentioning

confidence: 99%

Reaction stoichiometry directs the architecture of trimetallic nanostructures produced via galvanic replacement

et al. 2023

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Constructing a library of metal and metal–oxide nanoparticle heterodimers through colloidal assembly

Abstract: Nanoparticle dimers composed of different metals or metal oxides, as well as different shapes and sizes, are of wide interest for applications ranging from nanoplasmonic sensing to nanooptics to biomedical engineering.

Cited by 7 publications

References 86 publications

Algorithm‐Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Algorithm‐Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Water-Dispersible Nanocatalysts with Engineered Structures: The New Generation of Nanomaterials for Energy-Efficient CO₂ Capture

Reaction stoichiometry directs the architecture of trimetallic nanostructures produced via galvanic replacement

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Constructing a library of metal and metal–oxide nanoparticle heterodimers through colloidal assembly

Abstract: Nanoparticle dimers composed of different metals or metal oxides, as well as different shapes and sizes, are of wide interest for applications ranging from nanoplasmonic sensing to nanooptics to biomedical engineering.

Cited by 7 publications

References 86 publications

Algorithm‐Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Algorithm‐Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Water-Dispersible Nanocatalysts with Engineered Structures: The New Generation of Nanomaterials for Energy-Efficient CO2 Capture

Reaction stoichiometry directs the architecture of trimetallic nanostructures produced via galvanic replacement

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Water-Dispersible Nanocatalysts with Engineered Structures: The New Generation of Nanomaterials for Energy-Efficient CO₂ Capture