MXenes
represent a novel class of 2D materials with unique properties
and have great potential for diverse applications in sensing and electronics;
however, their directed assembly at interfaces has not yet been achieved.
Herein, the plasmonic heating of MXenes was exploited to achieve the
controlled deposition of MXene assemblies via a laser-directed microbubble.
The influence of various factors such as solvent composition, substrate
surface chemistry, MXene concentration, and laser fluence was investigated,
establishing the optimal conditions for rapid patterning with good
fidelity. Printed MXene assemblies showed good electrical conductivity
and plasmonic sensing capabilities and were able to meet or exceed
the state of the art without additional postprocessing steps. This
represents the first study of a directed approach for microfabrication
using MXenes and lays the foundation for future work in optically
directed assembly of MXenes and MXene-based nanocomposites at interfaces
toward sensors and devices.
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