Two-Dimensional Dynamics of Metal Nanoparticles on the Surface of Thin Polymer Films Studied with Coherent X Rays

by: S Streit, C Gutt, V Chamard, A Robert, M Sprung, H Sternemann, M Tolan

Physical Review Letters, Vol. 98, No. 4. (2007)

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Abstract

X-ray photon-correlation spectroscopy is used to measure the dynamic structure factor f(q,) of gold particles moving on the surface of thin polymer films. Above the glass transition of the polymer the peculiar form f(q,)~exp[-()] is found with 0.7<<1.5, depending on sample age and temperature. The relaxation rates scale linearly with q, excluding a simple Brownian diffusive motion. This type of behavior, already observed in aging bulk soft matter systems, is explained by a power law distribution of particle velocities due to ballistic motion.

@article{citeulike:2563095, abstract = {X-ray photon-correlation spectroscopy is used to measure the dynamic structure factor f(q,) of gold particles moving on the surface of thin polymer films. Above the glass transition of the polymer the peculiar form f(q,)~exp[-()] is found with 0.7\<\<1.5, depending on sample age and temperature. The relaxation rates scale linearly with q, excluding a simple Brownian diffusive motion. This type of behavior, already observed in aging bulk soft matter systems, is explained by a power law distribution of particle velocities due to ballistic motion.}, author = {Streit, S. and Gutt, C. and Chamard, V. and Robert, A. and Sprung, M. and Sternemann, H. and Tolan, M. }, citeulike-article-id = {2563095}, doi = {10.1103/PhysRevLett.98.047801}, journal = {Physical Review Letters}, keywords = {2007, diffusion, experiment, film, nano, polymer}, number = {4}, posted-at = {2008-03-19 17:04:03}, priority = {2}, publisher = {APS}, title = {Two-Dimensional Dynamics of Metal Nanoparticles on the Surface of Thin Polymer Films Studied with Coherent X Rays}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000098000004047801000001\&idtype=cvips\&gifs=yes}, volume = {98}, year = {2007} }

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TY - JOUR ID - citeulike:2563095 L3 - citeulike-article-id:2563095 TI - Two-Dimensional Dynamics of Metal Nanoparticles on the Surface of Thin Polymer Films Studied with Coherent X Rays JF - Physical Review Letters VL - 98 IS - 4 PB - APS N2 - X-ray photon-correlation spectroscopy is used to measure the dynamic structure factor f(q,) of gold particles moving on the surface of thin polymer films. Above the glass transition of the polymer the peculiar form f(q,)~exp[-()] is found with 0.7<<1.5, depending on sample age and temperature. The relaxation rates scale linearly with q, excluding a simple Brownian diffusive motion. This type of behavior, already observed in aging bulk soft matter systems, is explained by a power law distribution of particle velocities due to ballistic motion. KW - 2007 KW - diffusion KW - experiment KW - film KW - nano KW - polymer AU - Streit, S AU - Gutt, C AU - Chamard, V AU - Robert, A AU - Sprung, M AU - Sternemann, H AU - Tolan, M PY - 2007/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000098000004047801000001&idtype=cvips&gifs=yes ER -

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