期刊
ADVANCED SCIENCE
卷 6, 期 15, 页码 -出版社
WILEY
DOI: 10.1002/advs.201802318
关键词
complementary metal-oxide-semiconductors (CMOSs); graphene oxide; patterning; roll-to-roll; sensors; water-exfoliated graphene
资金
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/K017160/1, EP/K010050/1, EP/M001024/1, EP/M002438/1]
- Leverhulme Trust
- EPSRC [EP/M001024/1, EP/K010050/1, EP/M015173/1, EP/M002438/1, EP/K017160/1] Funding Source: UKRI
One of the main advantages of 2D materials for various applications is that they can be prepared in form of water-based solutions. The high yield and cost-effectiveness of this method make them of great interest for printed electronics, composites, and bio- and healthcare technologies. However, once deposited on a substrate, etching away these solution-processed materials is a difficult task, yet crucial for pattern definition and thus device fabrication. In particular, the realization of micrometer-sized patterns requires mesh and paste optimization when screen-printed or solvent-engineered and surface functionalization when inkjet-printed, both usually involving additional postdeposition steps. These constraints are holding back the integration of these 2D materials in devices and applications. In this work, a method for the fabrication of micrometer-sized well-defined patterns in water-based 2D materials is presented, with an extensive characterization of the films and patterns obtained. The method is ultimately used to create humidity sensors with performance comparable to that of commercial ones. These sensor devices are fabricated onto a 4' silicon and polyethylene terephthalate (PET) wafers to create all-graphene humidity sensors that are flexible, transparent, and compatible with current complementary metal-oxide-semiconductor (CMOS) and roll-to-roll workflows.
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