Magneto-thermochromic coupling Janus sphere for dual response display. Issue 31 (7th June 2019)

• Record Type: Journal Article
• Authors: Cui, Yiwen; Wang, Yu; Wu, Jie; He, Xiaokang; Xuan, Shouhu; Gong, Xinglong
• Is Part Of: RSC advances. Volume 9:Issue 31(2019)
• Page Start: 17959
• Page End: 17966
• Publication Date: 2019-06-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra02892g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This work demonstrates a simple microfluidic device to synthesize a magneto-thermochromic sphere with Janus inner structure. Abstract : This work demonstrates a simple microfluidic device to synthesize a magneto-thermochromic sphere with Janus inner structure. The Janus sphere is composed of Fe3 O4 microspheres, thermochromic particles, and polyacrylamide matrix. Because the Fe3 O4 microspheres are assembled together in one pole, the Janus sphere can turn around by varying the direction of the external magnetic field. Originating from the temperature-dependent property of the thermochromic particles, the final Janus sphere can change its color from red to pale blue when the temperature is increased from 5 to 45 °C. The detailed formation process and the magneto-thermochromic mechanism are carefully investigated. Due to the magnetic switch and thermochromism, these Janus spheres can be applied as colorful displays by controlling the magnetic field and temperature. The results demonstrate that the dual responsive Janus spheres possess broad application potential in temperature sensors and displays.