Guiding growth orientation of two-dimensional Au nanocrystals with marine chitin nanofibrils for ultrasensitive and ultrafast sensing hybrids.,Journal of Materials Chemistry B

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Guiding growth orientation of two-dimensional Au nanocrystals with marine chitin nanofibrils for ultrasensitive and ultrafast sensing hybrids.
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2017-12-04 , DOI: 10.1039/c7tb02792c
Yijun Chen ₁ , Zhengqin Liu , Mingjie Li , Xiaochen Wu , Jun You , Chaoxu Li

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We demonstrate that marine chitin nanofibrils are able to modulate the growth direction of two-dimensional Au nanocrystals from nanoribbons, nanokites to nanosheets. The mechanism investigation reveals that deacetylation and exfoliation of chitin nanofibrils are essential to template directional growth of Au nanocrystals. The tight adhesion of chitin nanofibrils on the Au surface enables the design of functional hybrids as ultrafast and ultrasensitive responsive devices for humidity and pressure. Interestingly, the humidity responsive device shows an abrupt increase in resistance of up to 3 orders of magnitude with a tiny variation of relative humidity from 62% RH to 63% RH, and was capable of precisely sensing speech. As a conductive filler, only 0.09 vol% gold nanoribbons are able to append to tissue paper with a sheet resistance of up to 220 Ω sq-1, which can be used as a frequently-used pressure-sensing device. These sensing hybrids are highly promising in smart clothing and electronic skins.

中文翻译：

指导二维Au纳米晶体与海洋几丁质纳米纤丝的生长方向，用于超灵敏和超快感杂交体。

我们证明了海洋几丁质纳米原纤维能够调节二维Au纳米晶体从纳米带，纳米盒到纳米片的生长方向。机理研究表明，几丁质纳米纤维的去乙酰化和剥落对于Au纳米晶体的模板定向生长是必不可少的。几丁质纳米纤维在Au表面上的紧密粘附使功能性杂种的设计成为针对湿度和压力的超快和超灵敏响应设备。有趣的是，该湿度响应设备显示出电阻的突然增加高达3个数量级，并且相对湿度从62％RH到63％RH很小变化，并且能够精确地感测语音。作为导电填料，仅0。09 vol％的金纳米带能够以高达220Ωsq-1的薄层电阻附着在薄纸上，可用作常用的压力传感设备。这些传感混合动力车在智能服装和电子皮肤中非常有前途。

更新日期：2017-11-24

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