000152108 001__ 152108
000152108 005__ 20250326144156.0
000152108 0247_ $$2doi$$a10.1039/c8sm00899j
000152108 0248_ $$2sideral$$a143307
000152108 037__ $$aART-2018-143307
000152108 041__ $$aeng
000152108 100__ $$aPatch, Adam
000152108 245__ $$aCurvature-dependent tension and tangential flows at the interface of motility-induced phases
000152108 260__ $$c2018
000152108 5060_ $$aAccess copy available to the general public$$fUnrestricted
000152108 5203_ $$aPurely repulsive active particles spontaneously undergo motility-induced phase separation (MIPS) into condensed and dilute phases. Remarkably, the mechanical tension measured along the interface between these phases is negative. In equilibrium this would imply an unstable interface that wants to expand, but these out-of-equilibrium systems display long-time stability and have intrinsically stiff boundaries. Here, we study this phenomenon in detail using active Brownian particle simulations and a novel frame of reference. By shifting from the global (or laboratory) frame to a local frame that follows the dynamics of the phase boundary, we observe correlations between the local curvature of the interface and the measured value of the tension. Importantly, our analysis reveals that curvature drives sustained local tangential motion of particles within a surface layer in both the gas and the dense regions. The combined tangential current in the gas and local “self-shearing” of the surface of the dense phase suggest a stiffening interface that redirects particles along itself to heal local fluctuations. These currents restore the otherwise wildly fluctuating interface through an out-of-equilibrium Marangoni effect. We discuss the implications of our observations on phenomenological models of interfacial dynamics.
000152108 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FIS2015-65078-C2-1-P
000152108 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000152108 590__ $$a3.399$$b2018
000152108 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b14 / 81 = 0.173$$c2018$$dQ1$$eT1
000152108 591__ $$aPOLYMER SCIENCE$$b14 / 85 = 0.165$$c2018$$dQ1$$eT1
000152108 591__ $$aCHEMISTRY, PHYSICAL$$b58 / 147 = 0.395$$c2018$$dQ2$$eT2
000152108 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b83 / 293 = 0.283$$c2018$$dQ2$$eT1
000152108 592__ $$a1.171$$b2018
000152108 593__ $$aCondensed Matter Physics$$c2018$$dQ1
000152108 593__ $$aChemistry (miscellaneous)$$c2018$$dQ1
000152108 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000152108 700__ $$aSussman, Daniel M.
000152108 700__ $$0(orcid)0000-0001-7276-2942$$aYllanes, David
000152108 700__ $$aMarchetti, M. Cristina
000152108 773__ $$g14, 36 (2018), 7435-7445$$pSoft Matter$$tSoft Matter$$x1744-683X
000152108 8564_ $$s2235709$$uhttps://zaguan.unizar.es/record/152108/files/texto_completo.pdf$$yPostprint
000152108 8564_ $$s2550681$$uhttps://zaguan.unizar.es/record/152108/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000152108 909CO $$ooai:zaguan.unizar.es:152108$$particulos$$pdriver
000152108 951__ $$a2025-03-26-13:55:19
000152108 980__ $$aARTICLE