The Effect of 2D Nanosheet Size on the Performance of Printed Devices

Printed networks of materials such as few layer MoS2 nanosheets enable the<br/>production of low-cost but poorer performance devices. Printed networks are arrays of nanoparticles deposited across a large area, with nanoparticles contacting one another at junctions. The poor performance of nanosheet networks is due to low nanosheet network mobility of about 0.1 cm2/Vs, this is in part due to inter-nanosheet junctions.<br/>To improve network mobility of printed networks, we must better understand these<br/>junctions. To achieve this, size-controlled networks have been developed by tuning nanosheet dimensions and characterising their electrical performance. Tuning of nanosheet aspect ratio from 500 to 100 has been achieved for the first-time using Sonication Induced Scission.<br/>Using this size selection technique, devices of a range of nanosheet sizes are<br/>developed, and their electrical properties characterised, revealing new insights into charge transport in these nanosheet networks.