A magnetically responsive photonic crystal of graphene oxide nanosheets

Ogawa, Daisuke; Nishimura, Tomoki; Nishina, Yuta; Sano, Koki

doi:10.1039/d3nr06114k

Nanoscale

2024

DOI: 10.1039/d3nr06114k

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A magnetically responsive photonic crystal of graphene oxide nanosheets

Daisuke Ogawa,

Tomoki Nishimura,

Yuta Nishina

et al.

Abstract: In this work, we systematically investigated the magnetically responsive behavior of a photonic crystal consisting of graphene oxide nanosheets and water, leading to the switching of its structural color by applying a magnetic field.

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Size‐Dependent Magnetic Responsiveness of a Photonic Crystal of Graphene Oxide Nanosheets

Ogawa,

Nishina,

Sano

2024

ChemPlusChem

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A magnetically responsive photonic crystal of colloidal nanosheets can exhibit a controllable structural color, offering diverse potential applications. In this study, we systematically investigated how the lateral sizes of graphene oxide (GO) nanosheets affect their magnetic responsiveness in a photonic system. Contrary to the prediction that larger lateral sizes of nanosheets would be more responsive to an applied magnetic field based on the magnetic energy of anisotropic materials, we discovered that GO nanosheets with larger lateral sizes in the photonic system scarcely responded to a 12 T magnetic field. The lack of magnetic response may be due to the strongly restricted rotational motion of GO nanosheets by mutual electrostatic forces. In contrast, GO nanosheets with medium lateral sizes readily responded to the 12 T magnetic field, forming a uniaxially oriented structure that resulted in a vivid structural color. However, smaller GO nanosheets displayed a less vivid structural color, possibly because of less structural ordering of GO nanosheets. Finally, we found that the photonic crystal of GO nanosheets with optimized lateral sizes responded effectively to the 12 T magnetic field across various GO concentrations, resulting in a vivid and tunable structural color.

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Size‐Dependent Magnetic Responsiveness of a Photonic Crystal of Graphene Oxide Nanosheets

Ogawa,

Nishina,

Sano

2024

ChemPlusChem

View full text Add to dashboard Cite

show abstract

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A magnetically responsive photonic crystal of graphene oxide nanosheets

Abstract: In this work, we systematically investigated the magnetically responsive behavior of a photonic crystal consisting of graphene oxide nanosheets and water, leading to the switching of its structural color by applying a magnetic field.

Cited by 1 publication

References 54 publications

Size‐Dependent Magnetic Responsiveness of a Photonic Crystal of Graphene Oxide Nanosheets

Size‐Dependent Magnetic Responsiveness of a Photonic Crystal of Graphene Oxide Nanosheets

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