Breathable Nanowood Biofilms as Guiding Layer for Green On-Skin Electronics
Breathable Nanowood Biofilms as Guiding Layer for Green On-Skin Electronics
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透气纳米木生物膜作为绿色皮肤电子产品的引导层
DOI：
10.1002/smll.201901079
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发表时间：
2019
期刊：
影响因子：
13.3
通讯作者：
He Jianying
中科院分区：
文献类型：
--
作者：
Zhou Tianle;Wang Jin Wen;Huang Ming;An Rong;Tan Huaping;Wei Hao;Chen Zheng Dong;Wang Xin;Liu Xiaoheng;Wang Feng;He Jianying
薄膜电子器件被要求直接层压到人体皮肤上，以实现可靠、灵敏的生物传感以及反馈透皮疗法，它们利用热电和湿气诱导电效应的自供电也受到了极大的关注（皮肤和皮肤电子器件（On-skinE）本身就是能量仓库）。然而，“薄膜”On-skinE 1）无法安装“笨重”的散热器或汗液传输通道，但温差发电机和湿敏发电机的输出功率分别依赖于发电机两端的温差（ΔT）和环境湿度（AH）； 2）缺乏用于生物传感的汗液路径和积累，缺乏用于精确透皮治疗的靶向药物输送； 3) 发热单元和热敏单元之间需要绝缘。在这里，展示了两个透气的纳米木材生物膜，它可以帮助在单元之间隔离并将热量和汗水引导到另一个平面内方向。透明生物膜实现了热量（925%）和汗水（338%）创纪录的高传输///传输⊥（//：沿着纤维素纳米纤维排列方向，⊥：垂直方向），赢得了强调ΔT/AH依赖的输出功率和“可靠”生物传感的应用。多孔生物膜适用于“敏感”生物传感（在第一秒传输//汗液高达 11.25 mm s−1）、单元之间“绝缘”以及盐溶性药物的“靶向”输送等优先考虑的应用。
Thin‐film electronics are urged to be directly laminated onto human skin for reliable, sensitive biosensing together with feedback transdermal therapy, their self‐power supply using the thermoelectric and moisture‐induced‐electric effects also has gained great attention (skin and on‐skin electronics (On‐skinE) themselves are energy storehouses). However, “thin‐film” On‐skinE 1) cannot install “bulky” heatsinks or sweat transport channels, but the output power of thermoelectric generator and moisture‐induced‐electric generator relies on the temperature difference (∆T) across generator and the ambient humidity (AH), respectively; 2) lack a routing and accumulation of sweat for biosensing, lack targeted delivery of drugs for precise transdermal therapy; and 3) need insulation between the heat‐generating unit and heat‐sensitive unit. Here, two breathable nanowood biofilms are demonstrated, which can help insulate between units and guide the heat and sweat to another in‐plane direction. The transparent biofilms achieve record‐high transport///transport⊥(//: along cellulose nanofiber alignment direction, ⊥: perpendicular direction) of heat (925%) and sweat (338%), winning applications emphasizing on ∆T/AH‐dependent output power and “reliable” biosensing. The porous biofilms are competent in applications where “sensitive” biosensing (transporting//sweat up to 11.25 mm s−1at the 1st second), “insulating” between units, and “targeted” delivery of saline‐soluble drugs are of uppermost priority.