Demonstration of Feasibility of X-Ray Free Electron Laser Studies of Dynamics of Nanoparticles in Entangled Polymer Melts

被引：35

作者：

Carnis, Jerome ^{[1
]}

Cha, Wonsuk ^{[1
]}

Wingert, James ^{[2
]}

Kang, Jinback ^{[1
]}

Jiang, Zhang ^{[3
]}

Song, Sanghoon ^{[4
]}

Sikorski, Marcin ^{[4
]}

Robert, Aymeric ^{[4
]}

Gutt, Christian ^{[5
,6
,7
]}

Chen, San-Wen ^{[2
]}

Dai, Yeling ^{[2
]}

Ma, Yicong ^{[2
]}

Guo, Hongyu ^{[2
]}

Lurio, Laurence B. ^{[8
]}

Shpyrko, Oleg ^{[2
]}

Narayanan, Suresh ^{[3
]}

Cui, Mengmeng ^{[9
]}

Kosif, Irem ^{[9
]}

Emrick, Todd ^{[9
]}

Russell, Thomas P. ^{[9
]}

Lee, Hae Cheol ^{[10
]}

Yu, Chung-Jong ^{[10
]}

Gruebel, Gerhard ^{[5
,6
]}

Sinha, Sunil K. ^{[2
]}

Kim, Hyunjung ^{[1
]}

机构：

[1] Sogang Univ, Dept Phys, Seoul 121742, South Korea

[2] Univ Calif San Diego, Dept Phys, San Diego, CA 92093 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[4] SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA

[5] Deutsches Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[6] Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany

[7] Univ Siegen, Dept Phys, D-57068 Siegen, Germany

[8] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[9] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

[10] Pohang Accelerator Lab, Pohang 790784, Gyeongbuk, South Korea

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

新加坡国家研究基金会;

关键词：

TEMPORAL SPECKLE CORRELATIONS; DELAY-LINE; SPECTROSCOPY;

D O I：

10.1038/srep06017

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The recent advent of hard x-ray free electron lasers (XFELs) opens new areas of science due to their exceptional brightness, coherence, and time structure. In principle, such sources enable studies of dynamics of condensed matter systems over times ranging from femtoseconds to seconds. However, the studies of "slow'' dynamics in polymeric materials still remain in question due to the characteristics of the XFEL beam and concerns about sample damage. Here we demonstrate the feasibility of measuring the relaxation dynamics of gold nanoparticles suspended in polymer melts using X-ray photon correlation spectroscopy (XPCS), while also monitoring eventual X-ray induced damage. In spite of inherently large pulse-to-pulse intensity and position variations of the XFEL beam, measurements can be realized at slow time scales. The X-ray induced damage and heating are less than initially expected for soft matter materials.

引用

页数：8

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