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SUMMARY:Nucleation in first order phase transitions starting from the top 
 - Dr Eduardo Sanz\, University Complutense of Madrid
DTSTART:20211020T133000Z
DTEND:20211020T143000Z
UID:TALK160747@talks.cam.ac.uk
CONTACT:Lisa Masters
DESCRIPTION:The first step of the transition from a mestastable arrangemen
 t of particles to a stable one is the nucleation of the latter somewhere w
 ithin the former. We use computer simulations to investigate this phenomen
 on. The common denominator in all our studies is that we start with the nu
 cleus already formed\, an approach we call “Seeding”. Although informa
 tion on the path leading to the formation of the nucleus is obviously lost
 \, we gain a wide overview on the nucleation rate trend\, which provides p
 hysical understanding of the nucleation behaviour upon changes of the ther
 modynamic conditions. With this approach\, for instance\, we have been abl
 e to understand the effect of pressure [1\,2] or solutes [3\,4] on ice nuc
 leation from supercooled water\; investigate the irreconcilable discrepanc
 ies between experiments and simulations of hard sphere crystallization [5]
 \; or even propose a new way of polymorph selection in charged colloids [6
 ]. I will discuss these interesting phase transition phenomena in my prese
 ntation introducing first the basic theoretical concepts to understand nuc
 leation.\n\n[1] Espinosa\, Jorge R.\; Zaragoza\, Alberto\; Rosales-Pelaez\
 , Pablo\; Navarro\, Caridad\; Valeriani\, Chantal\; Vega\, Carlos\; Sanz\,
  Eduardo\; Physical Review Letters\, 117\, 135702\, 2016\n\n[2] V Bianco\,
  PM de Hijes\, CP Lamas\, E Sanz\, C Vega\, Physical Review Letters 126 (1
 )\, 015704\, 2021\n\n[3] Soria\, G. D.\, Espinosa\, J. R.\, Ramirez\, J.\,
  Valeriani\, C.\, Vega\, C.\, & Sanz\, E.\;\nThe Journal of Chemical Physi
 cs\, 148(22)\, 222811.\, 2018\n \n[4]  JR Espinosa\, GD Soria\, J Ramirez\
 , C Valeriani\, C Vega\, E Sanz\;\nThe Journal of Physical Chemistry Lette
 rs 8 (18)\, 4486-4491\, 2017\n \n[5] JR Espinosa\, C Vega\, C Valeriani\, 
 D Frenkel\, E Sanz\, Soft matter 15 (47)\, 9625-9631\, 2019\n\n[6] I Sanch
 ez-Burgos\, A Garaizar\, C Vega\, E Sanz\, JR Espinosa\, Soft Matter 17 (3
 )\, 489-505\, 2021
LOCATION:Dept of Chemistry\, Wolfson Lecture Theatre and Zoom: Meeting ID:
  929 3874 2761 Passcode: 803269
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