Janus and patchy colloids at fluid interfaces

Bradley, Laura C.; Chen, Wei-Han; Stebe, Kathleen J.; Lee, Daeyeon

doi:10.1016/j.cocis.2017.05.001

Cited by 84 publications

(64 citation statements)

References 103 publications

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“…[31,32] An assembly of unmodified SiO 2 and amphiphilic Janus microbubbles showed strikingly different behaviors at a convex air-water interface. [33] Janus colloids can have undulating contact lines at the airwater interface and develop regions of attraction and repulsion among bubbles. [30] In our current study, new i) nonaqueous PC solvent and ii) a mixture of PC and aqueous hydrogen peroxide (chemical fuel) were used.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

“…The phenomenon of capillary curvature attraction is now well established, in prior work it was reported how interface curvature influence an attraction of microparticles . An assembly of unmodified SiO 2 and amphiphilic Janus microbubbles showed strikingly different behaviors at a convex air–water interface . Janus colloids can have undulating contact lines at the air–water interface and develop regions of attraction and repulsion among bubbles .…”

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confidence: 95%

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Nanoparticle‐Shelled Catalytic Bubble Micromotor

Adams

Lee

Mei

et al. 2020

Adv Materials Inter

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Nanoparticle‐shelled bubbles, prepared with glass capillary microfluidics, are functionalized to produce catalytic micromotors that exhibit novel assembly and disassembly behaviors. Stable microbubble rafts are assembled at an air–solvent interface of nonaqueous propylene carbonate (PC) solvent by creating a meniscus using a glass capillary. Upon the addition of hydrogen peroxide fuel, catalytic microbubbles quickly break free from the bubble raft by repelling from each other and self‐propelling at the air–fuel interface (a mixture of PC and aqueous hydrogen peroxide). While most of micromotors generate oxygen bubbles on the outer catalytic shell, some micromotors contain cracks and eject bubbles from the hollow shells containing air. Nanoparticle‐shelled bubbles with a high buoyancy force are particularly attractive for studying novel propulsion modes and interactions between catalytic bubble micromotors at air–fuel interfaces.

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Section: Wwwadvmatinterfacesdementioning

confidence: 99%

mentioning

confidence: 95%

Nanoparticle‐Shelled Catalytic Bubble Micromotor

Adams

Lee

Mei

et al. 2020

Adv Materials Inter

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“…[45] Currently, amphiphilic Janus colloids were employed to form patchy arrays on the fluid interphase. [48] Recently, emerging efforts were poised in developing particulate stabilizers with different shapes. [46] They greatly minimized the interfacial energy and formed strong electrostatic repulsion, which offered longterm stability against coalescence, compared with the homogeneous counterparts.…”

Section: Building Blocks For Tunable Pickering Emulsionmentioning

confidence: 99%

“…Here, we recommend a well-established review by Bradley et al for detailed information on Janusparticle-stabilized Pickering emulsions. [48] Recently, emerging efforts were poised in developing particulate stabilizers with different shapes. As nonspherical stabilizers, Pang and co-workers utilized cubic metal-organic framework (In, Ga) to prepare cubic-doped hollow microcapsules by heating the system to 120 °C.…”

Section: Building Blocks For Tunable Pickering Emulsionmentioning

confidence: 99%

The Horizon of the Emulsion Particulate Strategy: Engineering Hollow Particles for Biomedical Applications

Xia

et al. 2018

Advanced Materials

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With their hierarchical structures and the substantial surface areas, hollow particles have gained immense research interest in biomedical applications. For scalable fabrications, emulsion-based approaches have emerged as facile and versatile strategies. Here, the recent achievements in this field are unfolded via an "emulsion particulate strategy," which addresses the inherent relationship between the process control and the bioactive structures. As such, the interior architectures are manipulated by harnessing the intermediate state during the emulsion revolution (intrinsic strategy), whereas the external structures are dictated by tailoring the building blocks and solidification procedures of the Pickering emulsion (extrinsic strategy). Through integration of the intrinsic and extrinsic emulsion particulate strategy, multifunctional hollow particles demonstrate marked momentum for label-free multiplex detections, stimuli-responsive therapies, and stem cell therapies.

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“…In comparison with individual NPs coated with a uniform layer of polymer ligands, the self‐assembly (SA) and/or the surface patterning (SP) of polymer‐capped NPs provides additional versatility and level of control in the design of NP‐based functional materials. Patterning of NPs with chemically and/or topographically distinct surface regions renders directionality in their interactions and self‐assembly, and can be used to explore new SA modes, generate colloidal surfactants, and produce templates for the synthesis of multicomponent, hybrid NPs . Self‐assembly enables the organization of NPs into nanostructures with increasingly complex architectures, which exhibit new collective optical, magnetic, or electronic properties due to the coupling of properties of individual NPs.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly and Surface Patterning of Polyferrocenylsilane‐Functionalized Gold Nanoparticles

Choueiri

Klinkova

Pearce

et al. 2017

Macromol. Rapid Commun.

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Chemical and topographic surface patterning of inorganic polymer‐functionalized nanoparticles (NPs) and their self‐assembly in nanostructures with controllable architectures enable the design of new NP‐based materials. Capping of NPs with inorganic polymer ligands, such as metallopolymers, can lead to new synergetic properties of individual NPs or their assemblies, and enhance NP processing in functional materials. Here, for gold NPs functionalized with polyferrocenylsilane, two distinct triggers are used to induce attraction between the polymer ligands and achieve NP self‐assembly or topographic surface patterning of individual polymer‐capped NPs. Control of polymer–solvent interactions is achieved by either changing the solvent composition or by the electrooxidation of polyferrocenylsilane ligands. These results expand the range of polymer ligands used for NP assembly and patterning, and can be used to explore new self‐assembly modalities. The utilization of electrochemical polymer oxidation stimuli at easily accessible potentials broadens the range of stimuli leading to NP self‐assembly and patterning.

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Janus and patchy colloids at fluid interfaces

Cited by 84 publications

References 103 publications

Nanoparticle‐Shelled Catalytic Bubble Micromotor

Nanoparticle‐Shelled Catalytic Bubble Micromotor

The Horizon of the Emulsion Particulate Strategy: Engineering Hollow Particles for Biomedical Applications

Self‐Assembly and Surface Patterning of Polyferrocenylsilane‐Functionalized Gold Nanoparticles

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