Presentation Title

Synthesis and Assembly of Shape-Deformable Magnetic Responsive Photonic Structures

Faculty Mentor

Yadong Yin

Start Date

23-11-2019 10:00 AM

End Date

23-11-2019 10:45 AM

Location

227

Session

poster 3

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Magnetic responsive photonic structures are attractive due to their reversibility, quick response, and wide diffraction wavelength that can cover the whole visible range. However, these structures are very sensitive to any changes in the chemical environment rendering them unstable. In an attempt to minimize this disadvantage, this project uses shape-deformable magnetic nanoparticles—colloidal nanoparticle clusters (CNCs) coated with resorcinol formaldehyde polymers—as building blocks to assemble responsive photonic crystals. A silica coating was used to enhance the swelling effects and flexibility of the polymer shell to increase the stability and enhance the tunability of the distance between particles, which further contributes to the tunability of the diffraction wavelengths. The photonic properties were characterized visually by observing their response in the presence of a magnet, using optical microscopy, and using transmission electron microscopy. In the future, we can assemble these shape-deformable magnetic particles into two-dimensional or three-dimensional structures, and the shape-deformable property of the polymer shell would greatly contribute to the tunability of the close packed structures. Additionally, we can fix these particles into a polymer matrix, which can be used as a smart sensor.

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Nov 23rd, 10:00 AM Nov 23rd, 10:45 AM

Synthesis and Assembly of Shape-Deformable Magnetic Responsive Photonic Structures

227

Magnetic responsive photonic structures are attractive due to their reversibility, quick response, and wide diffraction wavelength that can cover the whole visible range. However, these structures are very sensitive to any changes in the chemical environment rendering them unstable. In an attempt to minimize this disadvantage, this project uses shape-deformable magnetic nanoparticles—colloidal nanoparticle clusters (CNCs) coated with resorcinol formaldehyde polymers—as building blocks to assemble responsive photonic crystals. A silica coating was used to enhance the swelling effects and flexibility of the polymer shell to increase the stability and enhance the tunability of the distance between particles, which further contributes to the tunability of the diffraction wavelengths. The photonic properties were characterized visually by observing their response in the presence of a magnet, using optical microscopy, and using transmission electron microscopy. In the future, we can assemble these shape-deformable magnetic particles into two-dimensional or three-dimensional structures, and the shape-deformable property of the polymer shell would greatly contribute to the tunability of the close packed structures. Additionally, we can fix these particles into a polymer matrix, which can be used as a smart sensor.