Regensburg 2013 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
DS: Fachverband Dünne Schichten
DS 11: Poster Session I: Application of thin films; Ion beam induced surface patterns; Ion and electron beam induced processes; Micro- and nanopatterning (jointly with O)
DS 11.6: Poster
Monday, March 11, 2013, 17:00–20:00, Poster B1
Immobilization of Gold Nanoparticles on Polyethylene glycol brushes for SERS sensing applications — •Claudine Dawson1, Petra Uhlmann1, Dieter Fischer1, Guido Wilke2, and Manfred Stamm1,3 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany — 2Hochschule Esslingen, University of Applied Sciences, Esslingen, Germany — 3Technische Universität Dresden, Dresden, Germany
Recent studies demonstrated that polymer brushes can be exploited for the formation of nanoassemblies with metallic nanoparticles for SERS applications1,2. Multifunctional polymer brushes offer multiple binding sites on which metallic nanoparticles can either be reduced in situ1 or preformed nanoparticles can be bound covalently2, coordinatively3 or electrostatically4 by tuning their surface chemistry. We demonstrate how coordinative binding of gold nanoparticles to polyethylene glycol brushes grafted on silica substrates can be used to control the immobilized amount and distribution of the particles by variation of the polymer grafting density and -chain length. Additionally the size of the bound gold nanoparticles was varied. The influence of these parameters on the signal enhancement in SERS was probed by using the dye Rhodamine 6G and correlated to the gold nanoparticle arrangement in the nanoassemblies which was investigated by scanning electron microscopy and atomic force microscopy.
1. Adv. Funct. Mater. 2010, 20, 1756*1761 2. J. Mater. Chem. 2012, 22, 5155*5163 3. ACS Nano 2009, 3, 807-818 4. J. Am. Chem. Soc. 2004, 126, 15950-15951