BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Large soft matter unit cell reconstructions from x-ray and neutron scattering data DTSTART;VALUE=DATE-TIME:20141120T023000Z DTEND;VALUE=DATE-TIME:20141120T030000Z DTSTAMP;VALUE=DATE-TIME:20260612T104517Z UID:indico-contribution-210-727@events01.synchrotron.org.au DESCRIPTION:Speakers: Chris Garvey (ANSTO)\nFourier methods may be used to reconstruct the scattering length density profile of the unit cell from n eutron and x-ray diffraction measurements thus yielding information about the distribution of chemical component. Deuteration of the sample componen ts can be used for phasing of the Fourier reconstruction or to provide con trast between components in bilayer stacks1. We discuss the application o f selective deuteration of various components of the lipid bilayer and the application of such methods to systems of higher dimensionality such hexa gonal and cubic phases and the use of anomalous (energy dependent) diffrac tion as a means of obtaining phase information.\n\n1. Kent\, B.\; Hunt\ , T.\; Darwish\, T. A.\; Hauß\, T.\; Garvey\, C. J.\; Bryant\, G.\, Local ization of trehalose in partially hydrated DOPC bilayers: insights into cr yoprotective mechanisms. Journal of The Royal Society Interface 2014\, 11 (95).\n\nhttps://events01.synchrotron.org.au/event/3/contributions/727/ LOCATION: Conference Room AS URL:https://events01.synchrotron.org.au/event/3/contributions/727/ END:VEVENT BEGIN:VEVENT SUMMARY:High-throughput synchrotron SAXS studies on lipidic mesophases DTSTART;VALUE=DATE-TIME:20141120T030000Z DTEND;VALUE=DATE-TIME:20141120T032000Z DTSTAMP;VALUE=DATE-TIME:20260612T104517Z UID:indico-contribution-210-706@events01.synchrotron.org.au DESCRIPTION:Speakers: Charlotte Conn (RMIT)\nSelf-assembled lipidic cubic phases are attracting increasing interest as biocompatible carriers of lar ge biomolecules including proteins\, peptides\, DNA and drugs [1]. A suite of new high-throughput techniques\, to formulate libraries of lipidic mes ophases\, and structurally characterize them using the SAXS/WAXS beamline at the Australian Synchrotron\, are described. Samples are contained with in any standard 96-well plate and mounted directly in the beamline. The te chnique is applicable to any combination of lipids\, additives and solvent s and sample masses down to 100 µg may be analysed. Up to 8000 samples m ay be produced robotically and screened in a 24 hr period. The technique is exemplified using the application of membrane protein crystallization [ 2]. We demonstrate how this high-throughput method allows screening of th e extremely large variable physiochemical space for crystallization\, whic h would be unreasonable to explore using traditional experimental methods. In addition the application of this technique to a wide variety of appli cations for lipidic mesophases will be described\, including pharmaceutica l (drug discovery\, drug delivery\, gene therapy and medical imaging)\, ma terials science (biosensors\, detergent industries)\, biology (long-term s torage of fragile proteins\, crystallization) and chemistry/physics (funda mental surfactant and lipid phase behaviour studies)\, which are currently restricted by difficulties in handling and characterizing this highly vis cous material. \n\n1. Conn\, C. E.\; Drummond\, C. J.\, Soft Matter 2 013\, 9 (13)\, 3449-3464.\n2. Conn\, C. E.\; Darmanin\, C.\; Mulet\, X. \; Le Cann\, S.\; Kirby\, N.\; Drummond\, C. J.\, Soft Matter 2012\, 8 (7 )\, 2310 – 2321.\n\nhttps://events01.synchrotron.org.au/event/3/contribu tions/706/ LOCATION: Conference Room AS URL:https://events01.synchrotron.org.au/event/3/contributions/706/ END:VEVENT BEGIN:VEVENT SUMMARY:X-Ray reflectometery on the SAXS/WAXS beamline DTSTART;VALUE=DATE-TIME:20141120T034000Z DTEND;VALUE=DATE-TIME:20141120T040000Z DTSTAMP;VALUE=DATE-TIME:20260612T104517Z UID:indico-contribution-210-668@events01.synchrotron.org.au DESCRIPTION:Speakers: Stephen Holt (Australian Nuclear Science and Technol ogy Organisation)\nX-ray (XRR) and Neutron Reflectometry (NR) techniques a re vital and widely used for characterising the interfacial structure of t hin films normal to a surface. XRR is regularly used to characterise syst ems such as ion distribution at the ionic-liquid/electrode surface\, the s tructure of thin film organic photovoltaics\, the structure of organic lig ht emitting devices\, phospholipid membranes at the air-liquid interface\, etc.\nXRR measurement are simple in principle: the intensity of reflected radiation is measured as a function of the momentum transfer\, Q\, which depends on the angle of incidence and the wavelength of the X-rays. Divid ing by the direct beam intensity gives the reflectivity. Providing one has sufficient incident beam collimation these experiments can be performed o n a lab-source x-ray diffractometer/reflectometer.\nThe energy of most lab sources (typically CuKα) restricts the choice for the upper medium\, usu ally to air. Therefore air/solid or air/liquid interfaces are studied but rarely solid/liquid\, liquid/liquid or buried interfaces. XRR at a synchr otron\, where the energy can be tuned allied with the high brilliance\, en ables one to overcome these limitations. We have undertaken experiments a t the liquid/solid interface on the SAXS/WAXS beamline using x-ray energie s of 20 keV.\nThis presentation will outline the progress that has been ma de with the expectation that this technique will be available to the wider user community. The success with organic solar cell dyes studied at the t itania/acetonitrile interface will be highlighted.\n\nhttps://events01.syn chrotron.org.au/event/3/contributions/668/ LOCATION: Conference Room AS URL:https://events01.synchrotron.org.au/event/3/contributions/668/ END:VEVENT BEGIN:VEVENT SUMMARY:SAXS and SANS characterisation of ion irradiation in polymers DTSTART;VALUE=DATE-TIME:20141120T032000Z DTEND;VALUE=DATE-TIME:20141120T034000Z DTSTAMP;VALUE=DATE-TIME:20260612T104517Z UID:indico-contribution-210-663@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/ END:VEVENT END:VCALENDAR