Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon, 34129, South Korea.
Adv Mater. 2019 Jan;31(2):e1804080. doi: 10.1002/adma.201804080. Epub 2018 Nov 12.
Color, as perceived through the eye, transcends mere information in the visible range of electromagnetism and serves as an agent for communication and entertainment. Mechanochromic systems have thus far only aimed at satisfying the sense of vision and have overlooked the possibility of generating acoustic vibrations in concert with their visual color responses that would enable the simultaneous satisfaction of the auditory system. Transcending the boundaries of the two senses (i.e., sound and color), herein a strategy for their concurrent and synesthetic fulfillment is elucidated by electrically actuating an organogel photonic device, controlled by a single input signal. This new class of devices that integrate a color module with a speaker is fabricated from a mechanochromic layer that comprises close-packed photonic lattice with an organogel matrix pervading the void fraction. Exploiting a dielectric elastomer actuator, the system's mechanical response permits the simultaneous, yet independent, exploration of visible-light reflection alongside audible sound-wave generation. Large areal strains at low frequencies of actuation tune the photonic stop-band, whereas the layer remains incompressible and exhibits negligible strain when actuated at higher frequencies (e.g., tens of Hz), thereby making it amenable to modulate sound and color simultaneously yet independently.
颜色通过眼睛感知，超越了电磁可见范围内的纯信息，成为了一种用于交流和娱乐的媒介。到目前为止，机械变色系统仅旨在满足视觉感知，而忽略了与视觉颜色响应协同产生声振动的可能性，这将使听觉系统同时得到满足。超越两种感官（即声音和颜色）的界限，本文通过电驱动光子有机凝胶器件来阐明同时和联觉满足这两种感官的策略，该器件由单个输入信号控制。这种将颜色模块与扬声器集成在一起的新型器件是由机械变色层制造的，该层由具有有机凝胶基质的紧密堆积光子晶格组成，基质渗透在空隙中。利用介电弹性体致动器，该系统的机械响应允许同时独立地探索可见光反射和可闻声波的产生。在低频致动时，大的面内应变会调谐光子带隙，而当在更高频率（例如几十赫兹）致动时，该层保持不可压缩且应变可忽略不计，因此使其能够同时独立地调制声音和颜色。
