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DS: Fachverband Dünne Schichten
DS 11: Focus Session: Sensoric Micro and Nano-systems I
DS 11.2: Vortrag
Dienstag, 1. April 2014, 10:00–10:15, CHE 89
Rolled-up magnetic nanomembranes: Towards 3D magnetic sensorics — •Denys Makarov1, Christian Müller2, Ingolf Mönch1, and Oliver G. Schmidt1 — 1Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden, Germany — 2Measurement and Sensor Technology, TU Chemnitz, 09126 Chemnitz, Germany
Rolled-up nanotechnology relies on the deterministic release of a strained nanomembrane from a sacrificial layer resulting in formation of a tube of predetermined size and geometry. The approach potentially allows to implement multiple functionalities on diagnostics e.g. electro-chemical, magnetic, optical into a single tubular architecture, thus realizing the Lab-in-a-Tube concept [1].
Here, we report on the realization of the rolled-up magnetic sensor element revealing giant magnetoresistance (GMR), which can be integrated into existing fluidic architectures as a component for the Lab-in-a-Tube [2-4]. The rolled-up tube acts as the fluidic channel guiding the magnetic objects, which can be detected with the integrated magnetic sensor. The performance of the rolled-up sensor was optimized for high sensitivity to weak magnetic fields, as required in biomedical applications, and demonstrated for the in-flow detection of CrO2 nanoparticles embedded in a biocompatible hydrogel shell [2].
[1] E. J. Smith et al., Lab Chip 12, 1917 (2012).
[2] I. Mönch et al., ACS Nano 5, 7436 (2011).
[3] C. Müller et al., Nanoscale 4, 7155 (2012).
[4] C. Müller et al., Appl. Phys. Lett. 100, 022409 (2012).