Title: Dielectrophoretic assembly of liquid-phase-exfoliated TiS3 nanoribbons for photodetecting applications,
Abstract: Liquid-phase-exfoliation is a technique capable of producing large quantities
of two-dimensional material in suspension. Despite many efforts in the
optimization of the exfoliation process itself not much has been done towards
the integration of liquid-phase-exfoliated materials in working solid-state
devices. In this article, we use dielectrophoresis to direct the assembly of
liquid-phase-exfoliated TiS3 nanoribbons between two gold electrodes to produce
photodetectors working in the visible. Through electrical and optical
measurements we characterize the responsivity of the device and we find values
as large as 3.8 mA/W, which improve of more than one order of magnitude on the
state-of-the-art for devices based on liquid-phase-exfoliated two-dimensional
materials assembled by drop-casting or ink-jet methods.