The micro- and nano-scale surfaces give the material its unique and interesting physical, chemical, and biological properties, and have attracted widespread attention from scientists. At present, the scientific community's focus is on the controllable adjustment of the properties of these surfaces, such as optical properties, surface friction, humidity, and adhesion. In many methods of creating a dynamic surface, the corrugated surface of the elastomeric matrix is ​​used to create a module that responds to external stimuli.
Recently, Prof. Jiang Xuesong’s group at Shanghai Jiaotong University reported a method for preparing dynamic wrinkles in response to near-infrared light. This method utilizes a polydimethylsiloxane elastomer containing carbon nanotubes as a matrix for a two-layer system and a plurality of functional polymers as a top layer material to produce dynamic wrinkles responsive to near-infrared light. Due to the high efficiency conversion of carbon nanotubes from light energy to thermal energy, CNT-PDMS achieves thermal expansion controlled by near-infrared light, thus realizing dynamic regulation of the two-layer system strain through near-infrared light switching. This near-infrared light driven dynamic wrinkle can be applied to smart displays, dynamic gratings, and light control electronics. This work was published in Sci., entitled "Near-Infrared Light-Responsive Dynamic Wrinkle Patterns." Adv. on.
Figure 1 Dynamic Folding in Near Infrared Driving
A. Near-infrared driven dynamic folds at room temperature
B. Effect of Temperature on Near Infrared Controlled CNT-PDMS
C. AFM images confirm the reversibility of near-infrared driven folds
Figure 2 Dynamic Fold Formation and Disappearance Through Near-infrared Switches
A-C. Disappearance of folds by near-infrared radiation
D-F. Fold formation by stopping near-infrared radiation
G. With the increase of near-infrared radiation time, the disintegration and corresponding fold change of CNT-PDMS
H. Wrinkle formation and disappearance cycle
Figure 3 Controlling the wrinkle pattern and its real-time dynamic changes through near-infrared
A. Illustration of near-infrared radiation for wrinkle formation
B-D. Illustration of the disappearance of fold patterns in near-infrared radiation
E-G. Image shows the process of stopping near-infrared radiation and slowly recovering the image
Fig. 4 Near-infrared response fold pattern as dynamic grating
A. Illustration of a near-infrared radiation controlled dynamic grating
B. Near infrared switches control the evolution of light diffraction patterns
Figure 5 illustrates the near-infrared driving smart window, information recording and electronic device
A. Change in transparency due to reversible changes in wrinkled and non-folded surfaces
B. Information recording through different photomasks
C. Graphical near-infrared drive electronics
D. Folding and Recovery of Gold-PAN/CNT-PDMS Folds
E. Resistance changes with near-infrared radiation time
summary
This work reported a method for preparing dynamic wrinkles in response to near-infrared light. This method utilizes a polydimethylsiloxane elastomer containing carbon nanotubes as a matrix for a two-layer system and a plurality of functional polymers as a top layer material to produce dynamic wrinkles responsive to near-infrared light. Due to the high efficiency conversion of carbon nanotubes from light energy to thermal energy, CNT-PDMS achieves thermal expansion controlled by near-infrared light, thus realizing dynamic regulation of the two-layer system strain through near-infrared light switching. This near-infrared light driven dynamic wrinkle can be applied to smart displays, dynamic gratings, and light control electronics.
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