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SUMMARY:Designing novel functional materials made of active colloids: the 
 role played by interactions - Chantal Valeriani (Universidad Complutense d
 e Madrid)
DTSTART:20190115T151500Z
DTEND:20190115T160000Z
UID:TALK116893@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Active matter systems are composed of constituents that consum
 e energy in order to move or exert mechanical forces\, constantly driving 
 themselves away from equilibrium [1]. Examples of active particles at the 
 mesoscopic scale are living\, such as bacteria\, or artificial\, such as a
 ctive colloids [2\,3] Experiments on spherical man-made self-propelled col
 loids have shown that active particles present interesting emergent collec
 tive properties [4&ndash\;6]\, such as motility-induced phase separation (
 MIPS)\, involving spontaneous assembly of particles due to the persistence
  of their direction of motion [7].  An example of colloids undergoing MIPS
  under suitable conditions are Active Brownian Particles (ABP)\, i.e. self
 -propelled Brownian particles  interacting with each other via a purely re
 pulsive potential [8].  In order to design novel functional materials\, on
 e might need to  gain control on the self-assembly process of active collo
 ids.  With this goal in mind\, we have explored the competition between ac
 tivity and  a broad range of interactions in a suspension of active colloi
 ds\,  considering either isotropic (strongly repulsive [9]\, attractive [1
 0\,11]\, micelle-inducing potential [12])  or anisotropic  (Janus-like)  p
 otential[13]\, unravelling the relevance of hydrodynamics [11\,14] and inv
 estigating mixtures of active/passive particles [15\,16\,17].            R
 EFERENCES:  [1]  C. Bechinger et al. Rev. Mod. Phys. 88\, 045006 (2016). [
 2] W.F. Paxton et al. Chem. Commun. 441\, 3 (2005). [3] S. Fournier-Bidoz 
 et al. J. Am. Chem. Soc. 126\, 13424 (2004). [4] S. Thutupalli\, R. Seeman
 n\, S. Herminghaus New J. Phys. 13\, 073021 (2011). [5] D. Nishiguchi\, Ma
 saki S. Phys. Rev. E 92\, 052309 (2015). [6] I. Buttinoni\, J. Bialk&eacut
 e\;\, F. Ku&#x308\;mmel\, H. L&ouml\;wen\, C. Bechinger\, T. Speck. Phys.R
 ev. Lett. 110\, 238301 (2013). [7] M.E. Cates\, J. Tailleur. Annu. Rev. of
  Condens. Matt. Phys. 6\, pp. 219-244 (2015). [8] S.Mallory\, C.Valeriani 
 and A.Cacciuto  Annual review of Physical Chemistry\, 69 59 (2018) [9] Die
 go Rogel Rodriguez\, Francisco Alarcon\, Raul Martinez\, Jorge Ramirez\, a
 nd Chantal Valeriani\, in preparation  (2018) [10] B. Mognetti\, A. Saric\
 , S. Angioletti-Uberti\, A. Cacciuto\, C. Valeriani and D. Frenkel Phys.Re
 v.Lett.\, 111 245702 (2013) [11]  F.Alarcon\, C.Valeriani and I.Pagonabarr
 aga Soft Matter 10.1039/C6SM01752E (2017) [12] C.Tung\, J.Harder\, C.Valer
 iani and A.Cacciuto\, Soft Matter 12 555 (2016) [13]  S.Mallory\, F.Alarco
 n\, A.Cacciuto and C.Valeriani New Journal of Physics (2017) [14]  F.Alarc
 on\,  E.Navarro\, C.Valeriani and I.Pagonabarraga\, PRE submitted (2018) [
 15] J.Harder\, S.Mallory\, C.Tung\, C.Valeriani and A.Cacciuto\,  J.Chem.P
 hys. 141 194901 (2014)  [16] R.Martinez\, F.Alarcon\, D.R.Rodiguez\, J.L.A
 ragones and C.Valeriani\,  EPJE 41 91 (2018) [17] Diego Rogel Rodriguez\, 
 Francisco Alarcon\, Raul Martinez\, Jorge Ramirez\, and Chantal Valeriani\
 , under review JCP (2018)     CO-AUTHORS: Francisco Alarcon\, Raul Martine
 z\, Juan Luis Aragones\, Jorge Ramirez\, Stewart Mallory\, Ignacio Pagoban
 arraga\, Angelo Cacciuto 
LOCATION:Seminar Room 1\, Newton Institute
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