In situ GISAXS Investigation of Gold Sputtering onto a Polymer Template

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• 作者：E. Metwalli ; S. Couet ; K. Schlage ; R. Rö ; hlsberger ; V. Kö ; rstgens ; M. Ruderer ; W. Wang ; G. Kaune ; S. V. Roth ; P. M&uuml ; ller-Buschbaum
• 刊名：Langmuir
• 出版年：2008
• 出版时间：April 15, 2008
• 年：2008
• 卷：24
• 期：8
• 页码：4265 - 4272
• 全文大小：771K
• 年卷期：v.24,no.8(April 15, 2008)
• ISSN：1520-5827

文摘

Microphase-separation structures in mixed diblock-triblock copolymer thin films are used for the incorporation ofgold atoms inside the polymer matrix via sputtering of gold. Polystyrene (PS) spheres are arranged in a liquidliketype with a well defined nearest neighbor distance inside a polyisoprene matrix acting as a template for directing thegold atoms. Sputtering conditions are selected with a very low sputtering rate to avoid clustering in the atmosphereso that gold reaches the polymer surface in its atomic state. Due to the mobility of the gold atoms and the selectiveinteraction with the PS parts of the microphase separation structure, gold is accumulated inside the polymer film inthe PS spheres, as probed in situ with grazing incidence small-angle X-ray scattering (GISAXS). Nominally 4.3 Åof gold is deposited, which by diffusion is spread out vertically over a thickness of 280 nm. UV-vis spectroscopyreveals a small blue shift for the gold sputtered polymer film. Atomic force microscopy proves the absence of goldclusters on the film surface. For low sputtering rate, GISAXS proves good sensitivity for gold migration inside thepolymer film and opens new possibilities for studying polymer-metal interaction.