Photonic crystal sensor for melamine based on magnetic molecularly imprinted nanoparticles self-assembled with an amphiphilic random copolymer

Hu, Tingyi; Xu, Jiasheng; Shang, Meng; Zhao, Qiang; Cao, Yuhua

doi:10.1007/s00604-022-05300-x

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…On the other hand, superparamagnetic nano Fe 3 O 4 in biomedicine, with its stable material property and good biocompatibility, can serve as magnetic fluid assisted hyperthermia and is expected to become an effective treatment method for cancer [5,6]. Therefore, this monodisperse superparamagnetic nanoparticle is widely used in the fields of color display [7,8], anti-counterfeiting [9,10], sensors [11,12], and biomedicine [13,14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Controllable Superparamagnetic Nano Fe3O4 Based on Reduction Method for Colloidal Clusters of Magnetically Responsive Photonic Crystals

Chen,

Tu,

et al. 2024

Nanomaterials

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In this paper, we designed and investigated a reduction-based method to synthesize controllably monodisperse superparamagnetic nano Fe3O4 colloidal clusters for magnetically responsive photonic crystals. It was shown that the addition of ascorbic acid (VC) to the system could synthesize monodisperse superparamagnetic nano Fe3O4 and avoided the generation of γ-Fe2O3 impurities, while the particle size and saturation magnetization intensity of nano Fe3O4 gradually decreased with the increase of VC dosage. Nano Fe3O4 could be rapidly assembled into photonic crystal dot matrix structures under a magnetic field, demonstrating tunability to various diffraction wavelengths. The nano Fe3O4 modified by polyvinylpyrrolidone (PVP) and silicon coated could be stably dispersed in a variety of organic solvents and thus diffracted different wavelengths under a magnetic field. This is expected to be applied in various scenarios in the field of optical color development.

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