Photonic Water Dynamically Responsive to External Stimuli
SCIE
SCOPUS
- Title
- Photonic Water Dynamically Responsive to External Stimuli
- Authors
- KIM, YOUN SOO; Sano, Koki; Ishida, Yasuhiro; Ebina, Yasuo; Sasaki, Takayoshi; Hikima, Takaaki; Aida, Takuzo
- Date Issued
- 2016-08
- Publisher
- NATURE PUBLISHING GROUP
- Abstract
- Fluids that contain ordered nanostructures with periodic distances in the visible-wavelength range, anomalously exhibit structural colours that can be rapidly modulated by external stimuli. Indeed, some fish can dynamically change colour by modulating the periodic distance of crystalline guanine sheets cofacially oriented in their fluid cytoplasm. Here we report that a dilute aqueous colloidal dispersion of negatively charged titanate nanosheets exhibits structural colours. In this 'photonic water', the nanosheets spontaneously adopt a cofacial geometry with an ultralong periodic distance of up to 675 nm due to a strong electrostatic repulsion. Consequently, the photonic water can even reflect near-infrared light up to 1,750 nm. The structural colour becomes more vivid in a magnetic flux that induces monodomain structural ordering of the colloidal dispersion. The reflective colour of the photonic water can be modulated over the entire visible region in response to appropriate physical or chemical stimuli.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/41304
- DOI
- 10.1038/ncomms12559
- ISSN
- 2041-1723
- Article Type
- Article
- Citation
- Nature Communications, vol. 7, 2016-08
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- There are no files associated with this item.
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