BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Soft\, Self-Organized Systems: Templates for Functional Nanomateri
 als - Erika Eiser\, Biological and Soft Systems Group\, Cavendish Laborato
 ry
DTSTART:20081016T150000Z
DTEND:20081016T160000Z
UID:TALK12768@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:Abstract: Ternary systems made of surfactant\, oil and water d
 isplay a variety of well-ordered nanostructured phases\, and are therefore
  believed to be interesting scaffolding material. Here I will present the 
 L3 phase\, also known as “sponge phase”\, with pore sizes in the range
  of ten nanometres. These are usually stable only within a narrow temperat
 ure and concentration range. However\, our research group has shown that t
 he sponge phase can be stabilized over a larger phase space by doping it w
 ith metal nanoparticle suspensions. We make and study sponge-phase samples
  doped with Au\, Ag\, and Pd aquasols and organosols. Remarkably\, Pd-dope
 d sponge phases are stable up to temperatures as high as 50 ºC. Polarised
  microscopy studies as well as small-angle and wide-angle X-ray scattering
  measurements (SAXS and WAXS) confirm that the nanoparticles are indeed in
 corporated in the sponge phase membrane. Moreover\, rheological measuremen
 ts show that\, unlike the undoped samples\, metal-doped sponge phases exhi
 bit reversible phase transitions under shear stress. The various factors t
 hat control the stability and optical properties of these metal-doped spon
 ge phases are outlined and discussed.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
END:VEVENT
END:VCALENDAR