Definierte Nanofasern mit einstellbarer Morphologie aus sphärischen Kolloidbausteinen

Bannwarth, Markus B.; Kazer, Samuel W.; Ulrich, S Schubert; Glaßer, Gunnar; Crespy, Daniel; Landfester, Katharina

doi:10.1002/ange.201302133

Angewandte Chemie

2013

DOI: 10.1002/ange.201302133

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Definierte Nanofasern mit einstellbarer Morphologie aus sphärischen Kolloidbausteinen

Markus B. Bannwarth

Samuel W. Kazer

S Schubert Ulrich

et al.

Abstract: Von Partikeln zu Fasern: Bei einer neuen Methode zur Herstellung von Nanofasern mit variabler Morphologie und Periodizität durch suprapartikuläre Anordnung von magnetischen Nanopartikeln schmilzt ein linearer Sinterprozess die angeordneten Kolloide zusammen (siehe Schema). Die Struktur der erhaltenen Fasern kann über die Prozessparameter sowie über die Morphologie der eingesetzten sphärischen Kolloid‐Bausteine kontrolliert werden.

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Cited by 5 publications

References 41 publications

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Angewandte Chemie

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Precise control of particles assembly has tremendous potential for fabricating intricate structures and functional materials.H owever,i ti ss till ac hallenge to achieve onedimensional assembly with precisely controlled morphology. An effective strategy is reported to precisely assemble particles into well-defined patterns by liquid confinement through controlling the viscosity of the assembly system. It is found that high viscosity of the system impedes particles rearrangement and facilitates the generation of zigzag or twined zigzag assembly structures,w hile lowv iscosity of the system allows particles to rearrange into linear or zipper structures driven by lowering the surface deformation of the liquid. As ar esult, precise control of different assembly patterns can be achieved through tuning the viscosity of solvent and size confinement ratios.T his facile approachs hows generality for particles assembly of different sizes and materials.

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Precise Assembly of Particles for Zigzag or Linear Patterns

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et al. 2017

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Synergistic Anticancer Therapy by Ovalbumin Encapsulation‐Enabled Tandem Reactive Oxygen Species Generation

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The anticancer efficacy of photodynamic therapy (PDT) is limited due to the hypoxic features of solid tumors. We report synergistic PDT/chemotherapyw ith integrated tandem Fenton reactions mediated by ovalbumin encapsulation for improved in vivo anticancer therapyv ia an enhanced reactive oxygen species (ROS) generation mechanism. O 2 C À produced by the PDT is converted to H 2 O 2 by superoxide dismutase,f ollowed by the transformation of H 2 O 2 to the highly toxic COH via Fenton reactions by Fe 2+ originating from the dissolution of co-loaded Fe 3 O 4 nanoparticles.T he PDT process further facilitates the endosomal/lysosomal escape of the active agents and enhances their intracellular delivery to the nucleus-even for drug-resistant cells.Cisplatin generates O 2 C À in the presence of nicotinamide adenine dinucleotide phosphate oxidase and therebyimproves the treatment efficiency by serving as an additional O 2 C À source for production of COH radicals.Improved anticancer efficiency is achieved under both hypoxic and normoxic conditions.

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Precise Assembly of Particles for Zigzag or Linear Patterns

Guo

Wang

et al. 2017

Angew Chem Int Ed

View full text Add to dashboard Cite

Precise control of particles assembly has tremendous potential for fabricating intricate structures and functional materials. However, it is still a challenge to achieve one-dimensional assembly with precisely controlled morphology. An effective strategy is reported to precisely assemble particles into well-defined patterns by liquid confinement through controlling the viscosity of the assembly system. It is found that high viscosity of the system impedes particles rearrangement and facilitates the generation of zigzag or twined zigzag assembly structures, while low viscosity of the system allows particles to rearrange into linear or zipper structures driven by lowering the surface deformation of the liquid. As a result, precise control of different assembly patterns can be achieved through tuning the viscosity of solvent and size confinement ratios. This facile approach shows generality for particles assembly of different sizes and materials.

show abstract

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Definierte Nanofasern mit einstellbarer Morphologie aus sphärischen Kolloidbausteinen

Cited by 5 publications

References 41 publications

Precise Assembly of Particles for Zigzag or Linear Patterns

Precise Assembly of Particles for Zigzag or Linear Patterns

Synergistic Anticancer Therapy by Ovalbumin Encapsulation‐Enabled Tandem Reactive Oxygen Species Generation

Precise Assembly of Particles for Zigzag or Linear Patterns

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