柔性電子:受生物啟發的微裂縫和連鎖可穿戴壓力感測器用於全範圍人機介面
摘要:
先講一下柔性可穿戴器件的巨大潛力
Flexible wearable pressure sensors have drawn tremendous interest for various applications in wearable healthcare monitoring, disease diagnostics, and human–machine interaction
但是有限制:感知壓力範圍,在低壓下的低感知靈敏度,高壓下的機械柔性,複雜的製造過程限制應用
However, the limited sensing range (<10%), low sensing sensitivity at small strains, limited mechanical stability at high strains, and complicated fabrication process restrict the extensive applications of these sensors for ultrasensitive full-range healthcare monitoring
將本論文中製造的結構:
Herein, a flexible wearable pressure sensor is presented with a hierarchically microstructured framework combining microcrack and interlocking, bioinspired by the crack-shaped mechanosensory systems of spiders and the wing-locking sensing systems of beetles
講器件的效能:0.2-80%的形變,快速響應/恢復,高靈敏度,極低的檢測閾值,1000個週期的耐久度
The sensor exhibits wide full-range healthcare monitoring under strain deformations of 0.2–80%, fast response/recovery time (22 ms/20 ms), high sensitivity, the ultrasensitive loading sensing of a feather (25 mg), the potential to predict the health of patients with early-stage Parkinson’s disease with the imitated static tremor, and excellent reproducibility over 10 000 cycles.
此外,能用於E-skins,感知壓力分佈和接觸形狀,也能整合到機器人的腿和接到無線發射機上。
The sensor exhibits wide full-range healthcare monitoring under strain deformations of 0.2–80%, fast response/recovery time (22 ms/20 ms), high sensitivity, the ultrasensitive loading sensing of a feather (25 mg), the potential to predict the health of patients with early-stage Parkinson’s disease with the imitated static tremor, and excellent reproducibility over 10 000 cycles.
實驗章節
材料:
過硫酸銨[Ammonium persulfate],
濃高氯酸[concentrated perchloric acid]
濃硫酸[concentrated sulfuric acid]
高錳酸鉀[potassium permanganate]
肼[
]
: 北京化工試劑廠
苯胺(distilled before use) : 百靈威化學 J&K Chemical
石墨烯薄片 graphite flakes: Sigma-Aldrich
美國生命科學與高科技集團公司
GO: c採用改進的Hummer 方法[52]
PU:
智慧機器人: Alibaba group 阿里巴巴集團
微裂縫的RGO片層包覆的PU泡泡沫
- 聚氨酯海綿(PU sponge) 使用氧氣等離子體預先處理5min,增加親水性(hydrophilicity) 此步驟非必須
- 將PU海綿浸入到GO溶液中(0.05mg/mL),將GO薄片整合到PU海綿上
- 接下來殘留在PU海綿上的GO片材,乾燥
- 將PU海綿浸入到60mL的水和肼( ), 120攝氏度, 1h。將GO還原到RGO。
- 最後在PU海面上獲得C-RGO片層
在微裂縫RGO片材上的PANI納米陣列的準備
典型的過程:
將上一步獲得材料浸入到40mL的 1M HClO4中,包含60uL的苯胺單體 (aniline monomer),之後,將99.95mg的APS新增到10mL的1MHClO4溶液中,攪拌知道溶解。將溶液倒入上述預製備的包含苯胺單體的溶液中,在5攝氏度下聚合8,16,24,32h
電子面板的製作
注意看一下這個是具體怎麼實現的
使用(65 mm × 65 mm × 10 mm)的海綿製作5 × 5的感知陣列。將銀膠料滴到上表面形成5 ×5的電極分佈,行和列分別用銅導線連線。同樣的方法在下表面執行一遍,最後在兩邊覆蓋一層絕緣層PDMS作為封裝。
上表面用行,下表面用列?