Journal: Advanced Functional Materials

Abbreviation

Adv. Funct. Mater.

Publisher

Wiley-VCH

Journal Volumes

ISSN

1616-3028
1616-301X

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Publications 1 - 10 of 241
  • Superior mass transfer properties of technical zeolite bodies with hierarchical porosity
    Item type: Journal Article
    Gueudré, Laurent; Milina, Maria; Mitchell, Sharon; et al. (2014)
    Advanced Functional Materials
  • Microstructures of CGO and YSZ Thin Films by Pulsed Laser Deposition
    Item type: Journal Article
    Infortuna, A.; Harvey, A.S.; Gauckler, Ludwig J. (2008)
    Advanced Functional Materials
  • Enhanced Piezocatalytic Performance of BaTiO$_3$ Nanosheets with Highly Exposed {001} Facets
    Item type: Journal Article
    Tang, Qiao; Wu, Jiang; Kim, Donghoon; et al. (2022)
    Advanced Functional Materials
    Piezocatalysis has gradually come into the limelight due to its great potential for solving energy shortages and environmental pollution problems. However, limited piezocatalytic efficiency is a severe bottleneck for its practical applications. Here, well-defined BaTiO$_3$ nanosheets with highly exposed {001} polar facets are successfully synthesized to enhance the piezocatalytic activity. The [001] piezoelectric polarization can drive the carriers to migrate to the surface along the out-of-plane direction. The polar surface provides abundant active sites for the piezocatalytic reaction. As a result, a superior piezocatalytic degradation ratio of organic pollutants is obtained with a high first-order rate constant $k$ of 0.0835 min$^{-1}$, which is 2.7 times higher than the BaTiO$_3$ nanoparticles. Furthermore, BaTiO$_3$ nanosheets display an outstanding H$_2$ production capability, with the rate of 305 µmol g$^{-1}$ h$^{-1}$, which is almost two times higher than that of BaTiO$_3$ nanoparticles. This work thus provides a novel and comprehensive strategy for designing high-performance piezocatalysts with an out-of-plane polarization, and also provides novel insights for the optimization of the piezocatalytic activity by regulating the polar facet of piezocatalysts.
  • Mobile Magnetic Nanocatalysts for Bioorthogonal Targeted Cancer Therapy
    Item type: Journal Article
    Hoop, Marcus; Ribeiro, Ana S.; Rösch, Daniel; et al. (2018)
    Advanced Functional Materials
  • A Variable Stiffness Magnetic Catheter Made of a Conductive Phase‐Change Polymer for Minimally Invasive Surgery
    Item type: Journal Article
    Piskarev, Yegor; Shintake, Jun; Chautems, Christophe; et al. (2022)
    Advanced Functional Materials
    Variable stiffness (VS) is an important feature that significantly enhances the dexterity of magnetic catheters used in minimally invasive surgeries. Existing magnetic catheters with VS consist of sensors, heaters, and tubular structures filled with low melting point alloys, which have a large stiffness change ratio but are toxic to humans. In this paper, a VS magnetic catheter is described for minimally invasive surgery; the catheter is based on a novel variable stiffness thread (VST), which is made of a conductive shape memory polymer (CSMP). The CSMP is nontoxic and simultaneously serves as a heater, a temperature sensor, and a VS substrate. The VST is made through a new scalable fabrication process, which consists of a dipping technique that enables the fabrication of threads with the desired electrical resistance and thickness (with a step size of 70 µm). Selective bending of a multisegmented VST catheter with a diameter of 2.0 mm under an external magnetic field of 20 mT is demonstrated. Compared to existing proof-of-concept VS catheters for cardiac ablation, each integrated VST segment has the lowest wall thickness of 0.75 mm and an outer diameter of 2.0 mm. The segment bends up to 51° and exhibits a stiffness change factor of 21.
  • Biotemplating of Metal-Organic Framework Nanocrystals for Applications in Small-Scale Robotics
    Item type: Journal Article
    Terzopoulou, Anastasia; Palacios-Corella, Mario; Franco, Carlos; et al. (2022)
    Advanced Functional Materials
    Biotemplating is a powerful approach for manufacturing small-scale devices. Here, the assembly of metal-organic framework (MOF) nanocrystals onto biotemplated magnetic helical structures on the cyanobacterium Spirulina platensis is reported. It is demonstrated that the authors' approach is universal and can be used to equip biotemplated structures with different functional MOF systems. The successful assembly of MOF nanocrystals on magnetically coated helical biotemplates is achieved by decorating the magnetic surface with gelatin, a naturally occurring macromolecule with synthon moieties that allows anchoring of the MOF nanocrystals via electrostatic interactions. Furthermore, as gelatin is a thermally responsive material, it can serve to free the magnetic biotemplates from the MOF nanocrystal cargoes. As such, the systems can be used as highly integrated magnetically driven microrobots with multiple functionalities. To this end, the potential of these composite helical architectures is demonstrated as MOF-based small-scale robots with applications in biomedicine and environmental remediation.
  • Investigation of Magnetotaxis of Reconfigurable Micro-Origami Swimmers with Competitive and Cooperative Anisotropy
    Item type: Journal Article
    Huang, Hen-Wei; Huang, Tian-Yun; Charilaou, Michalis; et al. (2018)
    Advanced Functional Materials
  • Superparamagnetic twist-type actuators with shape-independent magnetic properties and surface functionalization for advanced biomedical applications
    Item type: Journal Article
    Peters, Christian W.; Ergeneman, Olgaç; García, Pedro D.W.; et al. (2014)
    Advanced Functional Materials
  • Lattice-tunable Substituted Iron Garnets for Low-temperature Magnonics
    Item type: Journal Article
    Legrand, William; Kemna, Yana; Schären, Stefan; et al. (2025)
    Advanced Functional Materials
    The synthesis of nm-thick epitaxial films of iron garnets by physical vapor deposition has opened up exciting opportunities for the on-chip generation and processing of microwave signals encoded in magnons. However, iron garnet thin films suffer from demanding lattice-matching and stoichiometry requirements. Here a new approach to their synthesis is developed, enabling a precise and continuous tuning of iron garnet compositions based on the co-sputtering of binary oxides. By substituting a controlled proportion of iron with additional yttrium, Y3(YxFe5–x)O12 films of high crystalline quality are obtained, combining a widely tunable lattice parameter and excellent magnetization dynamics. This enables iron garnet thin films suited for cryogenic applications, which have long remained impractical due to microwave losses caused by paramagnetic garnet substrates. Low-temperature ferromagnetic resonance confirms the elimination of substrate paramagnetic losses for Y3(YxFe5–x)O12 films lattice-matched to Y3Sc2Ga3O12 (YSGG), a diamagnetic substrate. The Y3(YxFe5–x)O12 system can be matched to other substrates such as (Gd, Y)3Sc2Ga3O12. Bi-substituted films of (Bi0.8Y2.2)Fe5O12 also have ideal lattice matching to YSGG, demonstrating the versatility of this approach. This opens unprecedented options for cation substitutions in iron garnet films, offering a promising avenue to new properties and quantum magnonic devices operating in low-temperature environments.
  • Optoelectronic properties of quasi linear, self assembled platinum complexes
    Item type: Journal Article
    Debije, Michael G.; Haas, Matthijs P. de; Warman, John M.; et al. (2004)
    Advanced Functional Materials
Publications 1 - 10 of 241