Spatial Precision Tailoring the Catalytic Activity of Graphene Monolayers for Designing Janus Swimmers

Gao, Ruchao; Beladi-Mousavi, S. Mohsen; Salinas, Gerardo; Garrigue, Patrick; Zhang, Lin; Kuhn, Alexander

doi:10.1021/acs.nanolett.3c02314

Cited by 2 publications

(1 citation statement)

References 52 publications

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“…Even though BE has been successfully applied for the synthesis of a variety of Janus materials such as metals/metal oxides or sulfides (e.g., ZnO/Zn, TiO 2 /Ti, Al 2 O 3 /Al, CdS/Au), − metals/carbon (e.g., metal/glassy carbon, metal/carbon nanotubes, metal/graphene), ,, and also organic/inorganic hybrid moieties (e.g., polypyrrole/glassy carbon, polyaniline/alginate, PEDOT/Au, etc. ) − by electrochemical oxidation or electrochemical reduction at the polarized anode or cathode, a widespread application of this method is still restricted by two factors.…”

Section: Introductionmentioning

confidence: 99%

Design of Janus Particles by Bipolar Electrochemistry at the Water–Organic Interface

Fu,

Chen,

Xie

et al. 2024

Chem. Mater.

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Janus particles have a wide range of applications in diverse fields due to the possibility to tailor and combine different functionalities on a single particle. However, most of the current techniques for the synthesis of Janus particles are still suffering from limited control of the generated asymmetry. Therefore, achieving the synthesis of bifunctionalized Janus particles with a completely tunable modification ratio between two components is still extremely challenging. In this context, bipolar electrochemistry (BE) offers unique advantages to achieve controlled asymmetry in terms of the precise spatial distribution of electrochemical reactions at the two polarized extremities of a bipolar electrode. We propose herein an approach to synthesize Janus particles at the water/organic (w/o) interface by bipolar electrochemistry. Janus particles with varying degrees of amphiphilicity are first prepared by bipolar electrochemistry and are then positioned at the w/o interface. Subsequently, highly controlled bifunctionalization is achieved by carrying out different electrochemical reactions on their two sides. The ability to selectively modify the hydrophilic and hydrophobic regions allows for the generation of Janus particles with tailored properties at each face. This approach can be adapted for the synthesis of asymmetric particles with different dimensions, having various compositions and functionalities, thus opening up potential applications, ranging from catalysis and sensing to the delivery of active compounds.

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Section: Introductionmentioning

confidence: 99%

Design of Janus Particles by Bipolar Electrochemistry at the Water–Organic Interface

Fu,

Chen,

Xie

et al. 2024

Chem. Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

Synthesis of Multi‐Functional Graphene Monolayers via Bipolar Electrochemistry

Gao,

Beladi‐Mousavi,

Salinas

et al. 2024

ChemPhysChem

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Graphene has gained substantial research interest in many fields due to its remarkable properties among many other two‐dimensional materials. In this study, we propose a wireless electrochemical approach, bipolar electrochemistry, for the precise modification of single layers of graphene at predefined locations, such as distinct edges or corners, with a variety of metals or polymers, thus enabling the elaboration of multi‐functional monolayer graphene sheets. We illustrate the concept e.g. by depositing multiple metals, or platinum and a catalyst‐containing porous polymer on the same graphene sheet, but at separate corners. This configuration allows activating chemiluminescence on the polymer spot, and simultaneously generates the driving force for autonomous motion on the Pt side through the catalytic decomposition of hydrogen peroxide into oxygen bubbles. This integration of different chemical features on the same object, exemplified by these proof‐of‐principle experiments, enhances the functionality of two‐dimensional materials, paving the way for the use of these hybrid materials for a variety of applications, ranging from sensing and catalysis to targeted delivery.

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Spatial Precision Tailoring the Catalytic Activity of Graphene Monolayers for Designing Janus Swimmers

Cited by 2 publications

References 52 publications

Design of Janus Particles by Bipolar Electrochemistry at the Water–Organic Interface

Design of Janus Particles by Bipolar Electrochemistry at the Water–Organic Interface

Synthesis of Multi‐Functional Graphene Monolayers via Bipolar Electrochemistry

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