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DS: Fachverband Dünne Schichten

DS 35: Poster I: Application of thin films; Focus session: Sensoric micro and nano-systems; Focus Session: Sustainable photovoltaics with earth abundant materials; Graphen (joint session with TT; MA; HL; DY; O); Ion and electron beam induced processes; Layer properties: electrical, optical, and mechanical properties; Magnetic/organic interfaces, spins in organics and molecular magnetism; Micro- and nanopatterning (jointly with O); Organic electronics and photovoltaics (jointly with CPP, HL, O); Thermoelectric materials

DS 35.16: Poster

Mittwoch, 2. April 2014, 17:00–20:00, P1

Spectroscopic Monitoring of Carbon Nanotube Dispersion Preparation — •Toni Hille^1,2,3, Thomas Blaudeck¹, Sascha Hermann¹, Christian von Borczyskowski², and Stefan E. Schulz³ — ¹TU Chemnitz, Zentrum für Mikrotechnologien (ZfM), 09107 Chemnitz, Germany — ²TU Chemnitz, Center for Nanostructured Materials and Analytics (nanoMA), 09107 Chemnitz, Germany — ³Fraunhofer ENAS, 09126 Chemnitz, Germany

In this contribution, we introduce a systematic inspection tool for carbon nanotube dispersion preparation based UV-Vis-NIR-spectroscopy. Goal is the wafer-level integration of the CNTs by an electrokinetic deposition approach from an aqueous dispersion [1]. In order to estimate the dispersion quality during the preparation process, a microfluidic system with a quartz flow cell is built up. Related to the non-resonant and resonant features in the UV-Vis-NIR-spectra, the CNT concentration and degree of debundeling can be monitored and sonication paramters can be optimized [2]. It turns out that the degree of debundling is a function of both the absolute concentration of the CNTs and the relative concentration between the CNTs and the dispersion agents (sodiumlauryl sulfate, sodium deoxycholate, etc.)

[1] S. Hermann, H. Fiedler, H. B. Yu, S. Loschek, J. Bonitz, S. E. Schulz, T. Geßner, IEEE Proceedings Systems, Signals, and Devices (SSD), article ID 6198090 (5 pages) (2012).

[2] H. B. Yu, S. Hermann, S. E. Schulz, T. Geßner, Z. Dong, W. J. Li, Chemical Physics 408, 11-16 (2012).