Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 57: Thin Films, Nanostructures and Nanoparticles I

CPP 57.5: Vortrag

Donnerstag, 23. März 2017, 11:15–11:30, ZEU 114

Structural evolution of gold-teflon nanocomposite multilayer structure — •Pallavi Pandit¹, Ajay Gupta², Sigrid Bernstorff³, Matthias Schwartzkopf¹, Deniza Chekrygina⁴, and Stephan Roth¹ — ¹DESY, Notkestr. 85, D-22607 Hamburg — ²Amity University, 201313 Noida India — ³Elettra, SS 14, I-34149 Basovizza Trieste — ⁴UHH, Lurup. chaus. 149, D-22761 Hamburg

The combination of metal nanoparticles in polymer metrics has gained sustained research interest as their fine control of size and shape leads to the fabrication of materials with novel electronic, magnetic and catalytic properties. This offers some level of controllable performance. Thermal annealing as well can artificially modify the morphology of embedded metal nanoparticles. In this study the structural evolution of gold/PTFE multilayer nanocomposite has been studied using in-situ temperature dependent Grazing incidence Small and wide angle X-ray scattering. Nanoparticles exhibited a lognormal size distribution in multilayer structure. A rather well defined inter-particle correlation is observed in lateral and vertical direction. Linear dependence of the size of nanoparticles on square root of annealing time suggests a diffusion control growth of nanoparticles. After annealing at 573 K the nanoparticles distribution become isotropic in both the directions. UV-Vis reflectance spectroscopy has been used to study the Surface Plasmon Resonance of gold nanoparticles. The SPR frequency exhibits a systematic variation with gold content as well as with thermal annealing.