Self-assembled 3D magnetic vector field sensorics

Date

Apr 11, 2018

Time

1:30 PM - 2:30 PM

Speaker

Christian Becker

Affiliation

IFW Dresden (IIN)

Language

en

Main Topic

Materialien

Other Topics

Materialien, Physik

Host

Kristina Krummer-Meier

Description

An autonomous shape transformation has become a vital strategy in fabrication of compact three-dimensional mesoscopic systems, where conventional technologies fail.[1] Among numerous of self-assembly processes[2], self-folding of thin 2D patterned sheets has been extensively explored in recent years to build robots, drug delivery scaffolds and micro surgery tools owing to the direct compatibility with micro fabrication technologies. Polymeric and inorganic smart materials were synthesized especially to meet photolithographic requirements with novel self-reshaping functions. These materials have been already able to demonstrate the self-assembly capability into diverse 3D mesoscopic architectures of polyhedral, spherical or cylindrical geometries with an ultimate technological and functional convergence into complex microsystems. Purely relying on a parallel wafer scale process these technologies has been already allowing to enhance accuracy, throughput and manufacturing efficiency of complex 3D photonic, sensing, energy and electromagnetic functional elements, circuits and systems.[3–5] However, among numerous existing concepts, application of the self-assembly strategy in a class of sensors and systems such as magnetic field sensors, which rely on a spatial orientation has not been explored so far. The electric and magnetic functionality of such devices, namely the sensitivity towards e.g. fields and gradients, strongly depends on an orientation of device principal planes or vectors in a 3D environment. Fabrication of such unidirectional devices has a long practice in industry, while realization of multidirectional devices on a wafer scale in a parallel fashion is still associated with enormous challenges requiring sequential time consuming steps. In this respect, an automatic rearrangement of directional elements in a 3D space has a strong potential for realization of direction sensitive 3D systems produced via microfabrication technologies and a 3D self-assembly of smart materials from the planar state. In my talk, I will demonstrate the first realization of this intriguing concept utilizing shapeable polymeric materials. A number of magnetic field sensors, that initially possess a common principal plane and unidirectional sensitivity, were rearranged in a 3D space using self-assembled in a tube shapeable ultrathin films. Magnetic sensors were allocated on the surface of the microarchitecture achieving two principal planes forming a semi-orthogonal basis. This arrangement of magnetic sensors allows measurement of magnetic field direction of a permanent magnet located in a 3D space, the feature which is highly demanded in industry, robotics and medicine for position monitoring and diagnostics.

Links

• Seminars at the IFW

Last modified: Apr 11, 2018, 9:56:57 AM