The spontaneous construction of double reflection circularly polarized light/dual emission circularly polarized fluorescent cellulose film and its application in the field of anti-counterfeiting signs...

Light manipulation materials play an important role in many fields such as broadband reflectors, light-emitting diodes, and optoelectronic devices

Figure 1 Spontaneous construction strategy of double circularly polarized C NC film .

By changing the initial concentration of C NC and the assembly temperature, the kinetics can be controlled

Figure 2 ( a - c ) C NC film under white light ( a ), left-handed filter ( b ), right-handed filter ( c ) reflected optical patterns; ( d ) C NC and fluorescent quantum dots composite The circularly polarized fluorescence spectrum of the film; ( e ) the fluorescence asymmetry factor g _lum of the C NC composite film obtained under different conditions .

Figure 3 ( a ) After phase separation treatment, a C NC film with opposite circular polarization optical properties on the front and back sides and its circular dichroic spectrum ( b ) are obtained

  Based on the abundant circular polarization optical properties of the C NC film, the cooperative team further demonstrated its application potential in advanced optical anti-counterfeiting icons (Figure 4 )

Figure 4 The CNC composite film is applied to the mobile phone screen and bonded to the QR code, showing a variety of pattern changes, which can be used

For advanced optical encryption, security and so on

  In summary, the team provided a new idea of spontaneously constructing a dual-reflecting circularly polarized light / dual-emission circularly polarized fluorescent C NC film, which expanded the intrinsic circular polarization capability of the C NCfilm and its application prospects in the field of advanced optical anti-counterfeiting.

Professor Xu Yan Homepage:

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http://synlab.

Homepage of Professor Stephen Mann :

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