Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 80: Organic Thin Films, Organic-Inorganic Interfaces: Session II (joint session DS/CPP)
CPP 80.4: Vortrag
Freitag, 16. März 2018, 10:15–10:30, H 0111
Graphene based biosensing surfaces studied by IR-nanopolarimetry — •Karsten Hinrichs1, Timur Shaykhutdinov1, Christoph Kratz1, Felix Rösicke2, Cristoph Arenz3, Norbert H. Nickel2, and Jörg Rappich2 — 1Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Schwarzschildstr 8, 12489 Berlin, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institut für Silizium Photovoltaik, Kekuléstr. 5, 12489, Berlin, Germany — 3Institut für Chemie der Humboldt-Universität zu Berlin. Brook-Taylor-Str. 2, 12489 Berlin, Germany
AFM-IR based nanopolarimetry [1] for analysis of large area graphene pre-functionalized by diazonium compounds [2] and recognition of cysteine-modified peptide nucleic acid (PNA) [3] is presented. Homogeneity of the biosensing surfaces and the secondary structure of the PNA was studied by AFM-IR measurements. AFM-IR in a sensitive modus with synchronization between the pulse rate of the quantum cascade laser used as IR light source and the resonance of the cantilever can provide IR spectra in several seconds only. This facilitates direct insight into chemical composition, intermolecular interactions, and molecular orientation in nanoscale sub-ensembles.
[1] T. Shaykhutdinovet al, Supramolecular Orientation in Anisotropic Assemblies by IR Nanopolarimetry. ACS Macro Letters 2017, 598-602. [2] F. Rösicke et al, Chem. Commun. 53 (2017) 9308-9311. [3] K. Hinrichs et al, Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry 2018.