Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets
Retina-like photoimaging devices with features such as a wide-field-of-view and high spatial resolution have wide application prospects in retinal prosthetics and remote sensing. However, the fabrication of flexible and conformal surfaces is hindered by the incompatible microfabrication processes of...
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| Format: | Article |
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MDPI AG
2025-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/15/8/622 |
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| author | Tianxiang Li Hao Yuan Wentong Cai Qi Su Lingxian Kong Bo Sun Tielin Shi |
| author_facet | Tianxiang Li Hao Yuan Wentong Cai Qi Su Lingxian Kong Bo Sun Tielin Shi |
| author_sort | Tianxiang Li |
| collection | DOAJ |
| description | Retina-like photoimaging devices with features such as a wide-field-of-view and high spatial resolution have wide application prospects in retinal prosthetics and remote sensing. However, the fabrication of flexible and conformal surfaces is hindered by the incompatible microfabrication processes of traditional rigid, silicon-based substrates. A kirigami strategy for hemispherical surface assembly is proposed to construct a MoS<sub>2</sub>-based retina-like photodetector array. The device is first fabricated on a flat polyimide (PI) substrate and then tailored using a laser. By approximating the spherical surface using planar sectors, the laser-cut PI film can tightly adhere to the PDMS spherical shell without significant wrinkles. The responsivity and specific detectivity of our conformal photodetector can reach as high as 247.9 A/W and 6.16 × 10<sup>11</sup> Jones, respectively. The array integrates 180 pixels on a spherical crown with a radius of 11 mm, and a hollow letter “T” is successfully recognized. Comprehensive experimental results in this work reveal the utility of our device for photoelectric detection and imaging. We believe that our work provides a new methodology for the exploitation of 2D material-based retinal image sensors. |
| format | Article |
| id | doaj-art-9be782db172b4fcdb09722e2ccf6992f |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-9be782db172b4fcdb09722e2ccf6992f2025-08-20T02:28:27ZengMDPI AGNanomaterials2079-49912025-04-0115862210.3390/nano15080622Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> NanosheetsTianxiang Li0Hao Yuan1Wentong Cai2Qi Su3Lingxian Kong4Bo Sun5Tielin Shi6Aviation Key Lab of Science and Technology on High Performance Electromagnetic Windows, Jinan 250023, ChinaAviation Key Lab of Science and Technology on High Performance Electromagnetic Windows, Jinan 250023, ChinaAviation Key Lab of Science and Technology on High Performance Electromagnetic Windows, Jinan 250023, ChinaSchool of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaRetina-like photoimaging devices with features such as a wide-field-of-view and high spatial resolution have wide application prospects in retinal prosthetics and remote sensing. However, the fabrication of flexible and conformal surfaces is hindered by the incompatible microfabrication processes of traditional rigid, silicon-based substrates. A kirigami strategy for hemispherical surface assembly is proposed to construct a MoS<sub>2</sub>-based retina-like photodetector array. The device is first fabricated on a flat polyimide (PI) substrate and then tailored using a laser. By approximating the spherical surface using planar sectors, the laser-cut PI film can tightly adhere to the PDMS spherical shell without significant wrinkles. The responsivity and specific detectivity of our conformal photodetector can reach as high as 247.9 A/W and 6.16 × 10<sup>11</sup> Jones, respectively. The array integrates 180 pixels on a spherical crown with a radius of 11 mm, and a hollow letter “T” is successfully recognized. Comprehensive experimental results in this work reveal the utility of our device for photoelectric detection and imaging. We believe that our work provides a new methodology for the exploitation of 2D material-based retinal image sensors.https://www.mdpi.com/2079-4991/15/8/622electrochemical exfoliationMoS<sub>2</sub> photodetectorretinal imagingspherical conformal surface |
| spellingShingle | Tianxiang Li Hao Yuan Wentong Cai Qi Su Lingxian Kong Bo Sun Tielin Shi Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets Nanomaterials electrochemical exfoliation MoS<sub>2</sub> photodetector retinal imaging spherical conformal surface |
| title | Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets |
| title_full | Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets |
| title_fullStr | Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets |
| title_full_unstemmed | Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets |
| title_short | Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS<sub>2</sub> Nanosheets |
| title_sort | conformal retinal image sensor based on electrochemically exfoliated mos sub 2 sub nanosheets |
| topic | electrochemical exfoliation MoS<sub>2</sub> photodetector retinal imaging spherical conformal surface |
| url | https://www.mdpi.com/2079-4991/15/8/622 |
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