@article {2024,
	title = {Breaking the left-right symmetry in fluttering artificial cilia that perform nonreciprocal oscillations},
	year = {2024},
	month = {2024/04/06},
	abstract = {Recent investigations on active materials have introduced a new paradigm for soft robotics by showing that a complex response can be obtained from simple stimuli by harnessing dynamic instabilities. In particular, polyelectrolyte hydrogel filaments actuated by a constant electric field have been shown to exhibit self-sustained oscillations as a consequence of flutter instability. Owing to the nonreciprocal nature of the emerging oscillations, these artificial cilia are able to generate flows along the stimulus. Building upon these findings, in this paper we propose a design strategy to break the left-right symmetry in the generated flows, by endowing the filament with a natural curvature at the fabrication stage. We develop a mathematical model based on morphoelastic rod theory to characterize the stability of the equilibrium configurations of the filament, proving the persistence of flutter instability. We show that the emerging oscillations are nonreciprocal and generate thrust at an angle with the stimulus. The results we find at the level of the single cilium open new perspectives on the possible applications of artificial ciliary arrays in soft robotics and microfluidics.},
	isbn = {1572-9648},
	url = {https://doi.org/10.1007/s11012-024-01765-7},
	author = {Boiardi, Ariel Surya and Marchello, Roberto}
}
@article {2024,
	title = {A non local model for cell migration in response to mechanical stimuli},
	journal = {Mathematical Biosciences},
	volume = {368},
	year = {2024},
	month = {2024/02//},
	pages = {109124},
	isbn = {00255564},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0025556423001645},
	author = {Marchello, Roberto and Colombi, Annachiara and Preziosi, Luigi and Giverso, Chiara}
}
@article {2022,
	title = {The $N$-Link Swimmer in Three Dimensions: Controllability and Optimality Results},
	volume = {178},
	year = {2022},
	month = {2022/03/08},
	pages = {6},
	abstract = {The controllability of a fully three-dimensional $N$-link swimmer is studied. After deriving the equations of motion in a low Reynolds number fluid by means of Resistive Force Theory, the controllability of the minimal 2-link swimmer is tackled using techniques from Geometric Control Theory. The shape of the 2-link swimmer is described by two angle parameters. It is shown that the associated vector fields that govern the dynamics generate, via taking their Lie brackets, all eight linearly independent directions in the combined configuration and shape space, leading to controllability; the swimmer can move from any starting configuration and shape to any target configuration and shape by operating on the two shape variables. The result is subsequently extended to the $N$-link swimmer. Finally, the minimal time optimal control problem and the minimization of the power expended are addressed and a qualitative description of the optimal strategies is provided.},
	isbn = {1572-9036},
	url = {https://doi.org/10.1007/s10440-022-00480-3},
	author = {Marchello, Roberto and Morandotti, Marco and Shum, Henry and Zoppello, Marta}
}
