Human eye-inspired soft optoelectronic device using high-density MoS2-graphene curved image sensor array
Human eye-inspired soft optoelectronic device using high-density MoS2-graphene curved image sensor array
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DOI：
10.1038/s41467-017-01824-6
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发表时间：
2017-11-21
影响因子：
16.6
通讯作者：
Kim, Dae-Hyeong
中科院分区：
文献类型：
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作者：
Choi, Changsoon;Choi, Moon Kee;Kim, Dae-Hyeong
软生物电子器件提供了新的机会，下一代植入式设备，由于其软机械性质，导致最小的组织损伤和免疫反应。然而，由于传统成像模块及其组成材料的笨重和刚性，用于光学感测和视网膜刺激的可植入光电设备的软形式尚未开发。在这里，我们描述了一个高密度和半球形弯曲的图像传感器阵列，利用原子级薄的MoS 2-石墨烯异质结构和应变释放装置的设计。半球形弯曲的图像传感器阵列表现出红外盲，并成功地获取像素化的光信号。我们通过理论建模和有限元分析证实了所提出的软材料和MEMS器件设计的有效性。然后，我们提出了半球形弯曲的图像传感器阵列作为一个有前途的成像元件在软视网膜植入物。CurvIS阵列被用作人眼启发的软植入式光电设备，可以检测光信号并对视神经施加编程电刺激，对视网膜的机械副作用最小。
Soft bioelectronic devices provide new opportunities for next-generation implantable devices owing to their soft mechanical nature that leads to minimal tissue damages and immune responses. However, a soft form of the implantable optoelectronic device for optical sensing and retinal stimulation has not been developed yet because of the bulkiness and rigidity of conventional imaging modules and their composing materials. Here, we describe a high-density and hemispherically curved image sensor array that leverages the atomically thin MoS2-graphene heterostructure and strain-releasing device designs. The hemispherically curved image sensor array exhibits infrared blindness and successfully acquires pixelated optical signals. We corroborate the validity of the proposed soft materials and ultrathin device designs through theoretical modeling and finite element analysis. Then, we propose the ultrathin hemispherically curved image sensor array as a promising imaging element in the soft retinal implant. The CurvIS array is applied as a human eye-inspired soft implantable optoelectronic device that can detect optical signals and apply programmed electrical stimulation to optic nerves with minimum mechanical side effects to the retina.