Water-based and biocompatible 2D crystal inks for all-inkjet-printed heterostructures
Water-based and biocompatible 2D crystal inks for all-inkjet-printed heterostructures
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DOI：
10.1038/nnano.2016.281
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发表时间：
2017-04-01
影响因子：
38.3
通讯作者：
Casiraghi, Cinzia
中科院分区：
文献类型：
--
作者：
McManus, Daryl;Vranic, Sandra;Casiraghi, Cinzia
利用二维晶体的特性需要一种能够在任何衬底上产生任意复杂性的异质结构的大规模生产方法。石墨烯的溶液加工允许简单且低成本的技术，例如喷墨印刷用于设备制造。然而，可用的可印刷制剂仍然远不理想，因为它们基于有毒溶剂，浓度低，或者需要耗时且昂贵的加工。此外，由于不同二维晶体的再混合导致不受控制的界面和差的器件性能，没有一种适合于薄膜异质结构制造。在这里，我们展示了一种通用的方法来实现喷墨打印，水基，二维晶体配方，这也提供了最佳的膜形成多叠制造。我们展示了全喷墨印刷异质结构的例子，如塑料和纸张上的大面积光电传感器阵列以及可编程逻辑存储器件。最后，体外剂量递增细胞毒性试验证实了油墨的生物相容性，将其可能的用途扩展到生物医学应用。
Exploiting the properties of two-dimensional crystals requires a mass production method able to produce heterostructures of arbitrary complexity on any substrate. Solution processing of graphene allows simple and low-cost techniques such as inkjet printing to be used for device fabrication. However, the available printable formulations are still far from ideal as they are either based on toxic solvents, have low concentration, or require time-consuming and expensive processing. In addition, none is suitable for thin-film heterostructure fabrication due to the re-mixing of different two-dimensional crystals leading to uncontrolled interfaces and poor device performance. Here, we show a general approach to achieve inkjet-printable, water-based, two-dimensional crystal formulations, which also provide optimal film formation for multistack fabrication. We show examples of all-inkjet-printed heterostructures, such as large-area arrays of photosensors on plastic and paper and programmable logic memory devices. Finally, in vitro dose-escalation cytotoxicity assays confirm the biocompatibility of the inks, extending their possible use to biomedical applications.