Dip-pen nanolithography (DPN) and Polymer
pen lithography (PPL) are powerful lithography
techniques being able to pattern a wide range of inks.
Transport and surface spreading depend on the ink
physicochemical properties, defining its diffusive
and fluid character. Structure assembly on surface
arises from a balance between the entanglement of
the ink itself and the interaction with the substrate.
According to the transport characteristics, different
models have been proposed. In this article we review
the common types of inks employed for patterning, the
particular physicochemical characteristics that make
them flow following different dynamics as well as the
corresponding transport mechanisms and models that