Single-Stimulus-Induced Modulation of Multiple Optical Properties.
Hai LiChaoran LiWei SunYuzhu WangWenqiang HuaJingjing LiuShumin ZhangZhijie ChenShenghua WangZhiyi WuQishan ZhuRujun TangJia YuLe HeGeoffrey A OzinXiaohong ZhangPublished in: Advanced materials (Deerfield Beach, Fla.) (2019)
Stimuli-responsive smart optical materials hold great promise for applications in active optics, display, sensing, energy conversion, military camouflage, and artificial intelligence. However, their applications are greatly restricted by the difficulty of tuning different optical properties within the same material, especially by a single stimulus. Here, magnetic modulations of multiple optical properties are demonstrated in a crystalline colloidal array (CCA) of magnetic nanorods. Small-angle X-ray scattering studies reveal that these nanorods form an unusual monoclinic crystal in concentrated suspensions. The CCA exhibits optical anisotropy in the form of a photonic bandgap and birefringence, thus enabling magnetic tuning of the structural color and transmittance at a rate of 50 Hz. As a proof-of-concept, it is further demonstrated that the fabrication of a multifunctional device for display, anticounterfeiting, and smart-window applications based on this multiple magneto-optical effect. The study not only provides a new model system for understanding colloidal assembly, but also opens up opportunities for new applications of smart optical materials for various purposes.
Keyphrases
- high resolution
- artificial intelligence
- high speed
- big data
- molecularly imprinted
- machine learning
- deep learning
- drug delivery
- mass spectrometry
- cancer therapy
- reduced graphene oxide
- computed tomography
- high throughput
- magnetic resonance
- magnetic resonance imaging
- genome wide
- dna methylation
- high glucose
- endothelial cells
- liquid chromatography
- metal organic framework