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SUMMARY:SAXS and SANS characterisation of ion irradiation in polymers
DTSTART;VALUE=DATE-TIME:20141120T032000Z
DTEND;VALUE=DATE-TIME:20141120T034000Z
DTSTAMP;VALUE=DATE-TIME:20260815T124727Z
UID:indico-contribution-663@events01.synchrotron.org.au
DESCRIPTION:Speakers: Daniel Schauries (Department of Electronic Material 
 Engineering\, The Australian National University\, Australia)\nWhen expose
 d to swift heavy ion irradiation a wide range of materials show formation 
 of ion tracks as a result of their interaction with the material’s elect
 rons. These tracks are narrow\, cylindrical-shaped regions of high defect 
 concentration\, only a few nanometres in diameter and up to tens of microm
 eters in length. Ion-irradiated polymers allow the fabrication of microele
 ctronic devices such as micro-capacitors and as well as nanowires\, nano-m
 embranes and sensors. We have previously demonstrated small angle x-ray sc
 attering (SAXS) allows a size characterisation of latent tracks in inorgan
 ic materials [1].\n\nHere\, we present our recent results on the investiga
 tion of ion tracks in polycarbonate. SAXS measurements reveal a diameter o
 f 5 nm for tracks hosted within an organic polymer environment. Complement
 ary small angle neutron scattering (SANS) experiments at ANSTO reveal a si
 milar value. However\, probing the relative change in density between the 
 latent track and the host material\, SAXS shows significant less defect co
 ncentration within the tracks than SANS.  Both techniques are sensitive to
  different elements and allow a comparison of the atom-specific damages of
  ion irradiation in polycarbonate.\n\nFinally\, we present the effects of 
 thermal annealing on ion tracks in polycarbonate: Moderate temperatures (1
 00-200 oC) lead to an increase in track diameter\, contrary to our previou
 s results on tracks in crystals [2].\n\n[1] P. Kluth et al.\, Phys. Rev. L
 ett. 101 (2011) 175503. [2] D. Schauries et al.\, J. Appl. Cryst. 46 (2013
 ) 1558.\n\nhttps://events01.synchrotron.org.au/event/3/contributions/663/
LOCATION: Conference Room AS
URL:https://events01.synchrotron.org.au/event/3/contributions/663/
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