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SUMMARY:Probing microstructure in pharmaceutical solids using terahertz ra
 diation - Prof. Axel Zeitler\, CEB
DTSTART:20180131T140000Z
DTEND:20180131T150000Z
UID:TALK97618@talks.cam.ac.uk
CONTACT:Vanessa Blake
DESCRIPTION:Terahertz radiation has exciting potential to help with the un
 derstanding of fundamental and new challenges at the interface between phy
 sics\, materials chemistry and the life sciences but it is\, as yet\, larg
 ely unexplored. Light located in this range of the electromagnetic spectru
 m was very difficult to generate until quite recently. Since the 1990s new
  developments in semiconductor physics and femtosecond laser technology ha
 ve made it possible to provide light at terahertz frequencies (a frequency
  of 1 THz equals a wavelength of 0.3 mm) in a relatively simple way.\n\nTe
 rahertz radiation has unique properties in that it easily penetrates throu
 gh most polymeric materials and is therefore an exciting new tool to study
  such materials\, which are often opaque at visible frequencies. As well a
 s being a non-destructive probe of materials\, in organic molecular crysta
 ls terahertz radiation has the important property that it interacts with v
 ibrational modes that extend across large domains of a crystal lattice. Th
 is makes terahertz spectroscopy unique: even though it is possible to exci
 te molecules using a variety of energies it is only through the careful se
 lection of the low energy in the terahertz range that it is possible to se
 lectively excite crystal lattice vibrations and study in a unique way the 
 presence and nature of interactions between molecules.  \n\nIn this talk I
  will introduce our recent advances in exploring the microstructure of pha
 rmaceutical materials using terahertz radiation
LOCATION:Department of Chemical Engineering and Biotechnology\, West Cambr
 idge Site\, LT1
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