Dresden 2014 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 36: Colloids and Complex Liquids II
CPP 36.8: Talk
Wednesday, April 2, 2014, 17:00–17:15, ZEU 114
Writing nanoparticles lines: in-situ observation of structure formation — •Berit Heidmann1, Matthias Schwartzkopf1, Roman Mannweiler1, Stephan V. Roth1, Frans de Jong2, and Michael Schlüter2 — 1DESY, Notkestr. 85, 22607 Hamburg — 2Institute of Multiphase Flows, TUHH, Eißendorfer Str. 38, 21073 Hamburg
Adsorption of colloids on surfaces allows for tailored installation of ordered arrays of nano- and mesostructures [1]. Here, it is crucial to understand the adsorption process in-situ and follow the deposition and ordering of the colloids in line-type structures. For our in-situ investigation, we use a combination of microbeam grazing incidence small-angle x-ray scattering (GISAXS) and contact angle apparatus. The high-precision dosing system enables us to write line-type structures over macroscopic distances by depositing colloids from an aqueous solution (sub microliter) volume of nanoparticles. Such structures are useful for establishing complex conducting pathways on organic substrates without the use of designed masks. GISAXS enables us to detect the various stages of nanostructure formation, identifiable by the characteristic scattering of the gold colloids being adsorbed and chemically bound to the functionalized silicon. We present our results on the specific system gold nanoparticles on Mercapto-Propyl-Trimethoxy-silanized silicon surface and correlate our nanostructural finding with UV-Vis measurements. [1] Wu, T-H., Lu, H-H. and Lin, C-W., Dependece of Transport Rate on Area of Lithography and Pretreatment of Tip in Dip-Pen Nanolithography,Langmuir,2012,28,14509-14513