Sustainable production of highly conductive multilayer graphene ink for wireless connectivity and IoT applications
Journal: Nature communications
Publication Date: 05 December, 2018
Using graphene for printed electronics
Printed electronics offer a breakthrough in the penetration of information technology into everyday life. The possibility of printing electronic circuits on everyday objects will further promote the spread of the Internet of Things (IoT). The development of printed conductive inks for electronic applications has grown rapidly, widening applications in transistors, sensors, antennas, RFID tags and wearable electronics. Current conductive inks traditionally use metal particles for their high electrical conductivity. However, these materials can be expensive or easily oxidized, making them far from ideal for low cost IoT applications.
Researchers at the University of Manchester and National Physical Laboratory have developed an environmentally sustainable route of producing highly conductive graphene ink which is suitable for screen-printing technology. The use of non-toxic solvent ”Cyrene” significantly speeds up and reduces the cost of the liquid phase exfoliation of graphite. Printing with the ink results in very high conductivity graphene laminates, which allows us to produce wireless connectivity antennas from MHz to tens of GHz. These can then be used for wireless data communication and energy harvesting. This technology brings us very close to the widespread use of printed graphene technology for a broad range of applications.
- The proposed graphene ink can achieve very high electric conductivity, 7.13 Ã? 104 S/m without an annealing process.
- Low cost, screen-printed graphene devices are ideal for IoT applications such as healthcare and well-being monitoring, also embodying sustainability and disposability