Dresden 2017 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 48: Membranes and Vesicles II

BP 48.10: Vortrag

Donnerstag, 23. März 2017, 12:30–12:45, HÜL 386

Optically active, self-assembled solid-state nanopores for single particle detection — •Andreas Schlegel, Paul V. Gwozdz, Christian Heyn, Wolfgang Hansen, and Robert H. Blick — Institute of Nanostructure and Solid State Physics and Center for Hybrid Nanostructures (CHyN), University of Hamburg, Germany

Nanopores (NPs) are crucial components for single molecule detection setups. So far, NPs are used in DC i.e. for ionic blockage current measurements. Typically those DC measurements lack parallelity for high throughput. To address this, attempts using optically active NPs have been made.

In contrast to existing solid-state NP (SNP) experiments, we present an approach to use an SNP system which is inherently self-assembled and provides scalable pore diameters. These MBE-grown III-V SNPs are contained in a GaAs membrane. Furthermore, the SNPs in our system show photoluminescence and are potentially optically active due to the quantum confined Stark effect. This will be used for DNA sequencing in the future [1].

We introduce a procedure to transfer the membranes from its wafer substrate onto a transparent polymer. The membranes shall be suspended to use the embedded SNPs in a setup which combines DC with optical read-out.

[1] P. V. Gwozdz et. al., Appl. Phys. Lett. 109, 223103 (2016)