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SUMMARY:Identifying New Paradigms in Crystal Engineering for Energy and Bi
 omedical Applications
DTSTART:20170511T160000
DTEND:20170511T170000
DTSTAMP:20260511T105530Z
UID:32f0c9da51c870f0118f1382d577346ff5a1d0505a7f69390d6490e9
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Jeffrey Rimer\nDepartment of Chemical and Biomolecular E
 ngineering\,\nUniversity of Houston\, USA  \nChE-602 - Recent Events in E
 nergy seminar series\n\nCrystal engineering is a broad area of research th
 at focuses on methods of designing and/or optimizing materials for diverse
  applications in fields spanning from energy to medicine. The ability to s
 electively control crystallization to achieve desired material properties 
 requires detailed understandings of the thermodynamic and kinetic factors 
 regulating crystal nucleation and growth. Combining this fundamental knowl
 edge with innovative approaches to tailor crystal size\, structure\, and m
 orphology can lead to the production of materials with superior properties
  beyond what is achievable by conventional routes. In this talk I will dis
 cuss two general mechanisms of crystal growth:\n\n(1) classical pathways i
 nvolving 2-dimensional layer nucleation and advancement on crystal surface
 s through monomer addition\; and\n(2) nonclassical pathways\, termed cryst
 allization by particle attachment (CPA)\, involving the formation of metas
 table precursors that play a direct role in crystal nucleation and growth.
 \n\nOur group uses techniques such as atomic force microscopy (AFM) to inv
 estigate crystallization in situ under solvothermal conditions. We have de
 veloped a unique AFM system capable of capturing time-resolved dynamics of
  surface growth\, thus opening new routes to probe complex pathways of cry
 stallization. We also design “modifiers” to control crystal properties
  such as size and morphology. Modifiers are molecules or macromolecules th
 at interact with specific surfaces of crystals and regulate anisotropic gr
 owth rates.\n\nIn this talk\, I will show how we use growth modifiers to c
 ontrol crystallization in two distinctly different\, yet fundamentally sim
 ilar\, applications. In the first part of my talk I will discuss our work 
 on the development of therapeutic drugs for crystals implicated in two pat
 hological diseases: kidney stones (calcium oxalate monohydrate) and malari
 a (hematin).\n\nIn the second part of my talk\, I will discuss how we are 
 using modifiers as a bio-inspired approach to tailor the properties of zeo
 lites\, which are microporous aluminosilicates commercially used in cataly
 sis\, adsorption\, and ion-exchange processes. Topics that will be address
 ed include the broader challenges of synthesizing zeolites\, progress towa
 rds elucidating their complex mechanism(s) of growth\, and extensive effor
 t to develop commercially-viable approaches to tailor their physicochemica
 l properties.\n 
LOCATION:Zeuzier https://www.google.com/maps/place/EPFL+Valais+Wallis/?ref
 =zeuzier
STATUS:CONFIRMED
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