illuminated Helium laboratory from outside through the window


Conferences & Workshops

Sept. 25-27, 2019 Annual IFW Summer School for PhD students in Szczecin, Polan
 

Sept. 15-20, 2019

 

ECASIA19: 18th European Conference on Applications of Surface and Interface Analysis

Sept. 13-20, 2019

 Summer School Spectroelectrochemistry, IFW Dresden
May 20/21, 2019 International Workshop "Topology meets materials – Weizmann meets Dresden", IFW Dresden
March 28/29, 2019 

International Workshop "Quantum Dynamics, Transport, and Exotic Orders: Strolling among Spins and Strong Correlations", IFW Dresden

March 28/29, 2019 Joint workshop of BAM Berlin and IFW Dresden, IFW Dresden

Dec. 4-5. 2018

 UKRATOP Workshop, IFW Dresden

Oct. 1 – 2, 2018

 

SAW Symposium, Westin Bellevue Dresden, Dresden, Germany

Aug. 28-30, 2018 Spin , waves & interactions 2018, Greifswald, Germany

April 8- 11, 2018

 

667. WE-Heraeus-Seminar on System-oriented approach to thermoelectrics: Materials – Interfaces – Devices in Bad Honnef, Germany

March 11-16, 2018

 

Joint Conference of the Condensed Matter Divisions of the DPG and EPS,

  • Session "Geometry and Topology-Controlled Nanoarchitectures", organized by Prof. Dr. V. Fomin, IFW Dresden
  • Symposium “Topology in Condensed Matter Physics (SYTO)”, co-organizer Prof. Dr. Jeroen van den Brink, IFW Dresden
  • Symposium “Voltage Control of Functional Interfaces: Magneto-ionic Meet Memristive Systems (SYVC)”, Co-organizer Dr. Karin Leistner, IFW Dresden
 

Feb. 1, 2018

 

Workshop of the DFG Priority Programme 1458 “High Temperature Superconductivity in Iron Pnictides“, IFW Dresden

Jan.  29-31, 2018

 

EPSQMat 2018: International Workshop on Electron and photon spectroscopies of quantum materials: status and perspectives, IFW Dresden

Lectures this week


Dienstag 10.12.2019
IIN-Doktorandenseminar10:00
Ort IFW Dresden D2E.27
Referent Christian Niclaas Saggau
Thema Silicon as a Dry Release Platform for Wafer-scale Integration of Optical and Electrical Devices
On-chip integration of three dimensional optical and/or electrical devices has attracted increasing interest due to the promise to promote and extend their performance and applications. Among the reported approaches, self-rolling of prestrained nanomembranes provides an elegant way for 3D integration, in fields ranging from energy storage, compact electronic devices, integrated sensors to photonics and optical metamaterials.
In these previous reports, a wet release process was used, which has some inherent problems due to the presence of fluids. In liquid environments, fluid dynamics and capillary forces are the biggest obstacles for the release of dedicate structures, making a dry release process very attractive.

In my talk I will present our recent developments towards the dry release of pre-strained nanomembranes, which was adapted from the Silicon Sacrificial Layer Dry Etching technique. It is shown that this method is not only able to fabricate high-yield and high quality photonic microtube resonators, but also to manufacture 3D rolled-up micro-capacitors on a wafer scale. The fabricated devices exhibit ideal electrical characteristics as well as competitive capacitance. Moreover, periodic photonic and plasmonic lattices were integrated into rolled-up microtube resonators. The structures were patterned by electron beam lithography and structured by lift-off and/or dry etching. With this present work we demonstrate a new route for the fabrication of on-chip integrated novel hybrid photonic metamaterial systems.


Eingeladen von Dr. Libo Ma
Kontakt Kristina Krummer-Meier

Dienstag 10.12.2019
IMW - PhD Seminar 14:30
Ort IFW Dresden D2E.27
Referent Aleena Anna Thomas
Thema Influence of strain and granularity on the superconductivity in iron selenides
Eingeladen von Prof. Dr. Kornelius Nielsch
Kontakt Ines Firlle

Mittwoch 11.12.2019
Vortrag Research Group "Magnetic Composites and Applications"10:00
Ort IFW Dresden, Helmholtzstraße 20 B 3E.26
Referent Tapas Samanta
Thema Magnetostructural phase transition and associated multicaloric properties in MnTX-alloys
Eingeladen von Dr. Maria Krautz und Dr. Thomas Gemming
Kontakt Brit Präßler-Wüstling

Mittwoch 11.12.2019
IIN-Doktorandenseminar10:00
Ort Hörsaal, IFW Dresden A1E.10
Referent Boris Rivkin
Thema Towards an Integrated Micro-Robotic Catheter
Today, the leading cause of death in developed countries are diseases of the circulatory system. Among EU inhabitants, 6.1 million are diagnosed with a cardiovascular disease and 1.1 million suffer a stroke annually. Therapeutic interventions require access to the affected sites. Endovascular catheters have been used in minimally invasive procedures regularly and successfully. However, the potential of these techniques is limited due to the size and rigidness of the available tools as well as the lack of integrated functionalities. The medical community and patients would benefit from catheter systems that can flexibly adapt to individual patient anatomies, reach the smallest channels in the human body, and provide detailed information on the catheter’s position and the patient’s condition.

In this talk, I will discuss how polymeric roll up Technology can open a path towards integrated microrobotic catheter systems. To fabricate a high aspect ratio micro-catheter (100 µm diameter, 70 mm length), a polymeric layer stack is defined photo-lithographically and self-assembles into a swiss roll architecture. Such micro-tubes are integrated into a micro-fluidic system and can be used to deliver a fluid payload into microscopic cavities, such as a surgically isolated mouse blood vessel. In order to grant access to the most remote parts of the human cardiovascular and cerebrovascular system, future micro-catheters will need to offer full control of their shape and motion. This remains unattainable with currently available technologies. I investigate the potential of artificial muscles based on electro-active polymers (EAPs) to enable a steerable micro-catheter with multiple degrees of freedom. The properties of EAPs are studied with an on-chip model platform. A key challenge in EAP actuator based robotics is a varying actuation upon a given bias. To address this, an integrated sensor-actuator platform is developed. Here, it is demonstrated that strain gauges and magnetic sensors can provide the feedback necessary to operate EAP actuators with a PID controller, thus compensating the intrinsic variations of the EAP behavior over time. Finally, it is demonstrated that these technologies are compatible with the rolled-up catheter platform. With EAP actuators integrated onto a rolledup catheter, shape control and manipulation tasks are performed. To realize an intelligent catheter, magnetic sensors are integrated. These can be used to evaluate the catheter shape and its absolute position.


Eingeladen von Dr. Mariana Medina Sanchez
Kontakt Kristina Krummer-Meier

Mittwoch 11.12.2019
IMW-Seminar13:30
Ort IFW Dresden D2E.27
Referent Imre Bakonyi
Thema The specific grain boundary resistivity of Ni and Cu metals
In order to derive a reliable value for the specific grain-boundary resistivity SGBR of Ni metal, a study of the room-temperature electrical resistivity of nanocrystalline (nc) Ni metal samples produced by electrodeposition with various grain sizes was carried out. These resistivity data were compared with previous reports on nc-Ni and all results were analyzed according to the procedure of Andrews who found for bulk polycrystalline Cu that the resistivity increment due to grain boundaries is proportional to the grain-boundary surface area per unit volume which is, on the other hand, inversely proportional to the grain size. It is pointed out in our study that the grain size directly accessible by transmission electron microscopy (TEM) imaging is the relevant parameter for the evaluation of SGBR. This is because the crystallite size deduced from X-ray diffraction (XRD) line broadening leads to an underestimation of SGBR since coherency-breaking intragrain defects such as small-angle grain boundaries and twin boundaries which do not contribute significantly to the resistivity also cause an XRD line broadening.




Eingeladen von Prof. Dr. Kornelius Nielsch
Kontakt Ines Firlle

Donnerstag 12.12.2019
IFW Kolloquium 13:30
Ort IFW Dresden Hörsaal
Referent Karsten Grunewald
Thema Was sind uns Leistungen der Natur wert? Beispiele aus Dresden
Eingeladen von Dr. Doreen Kirmse
Kontakt

Freitag 13.12.2019
ITF-Seminar10:30
Ort IFW Dresden A 2E.30
Referent Yaqian Guo
Thema Computational materials design of Y-Fe permanent magnets
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Eingeladen von PD Dr. Manuel Richter
Kontakt Grit Rötzer

Freitag 13.12.2019
IIN-Seminar13:00
Ort IIN D2E.27
Referent Barbara Kaltschmidt
Thema Influence of natural and synthetic nanomaterials on bone regeneration
Bone regeneration is a highly orchestrated process crucial for endogenous healing procedures after accidents, infections or tumor therapy.

Changes in surface nanotopography are known to directly affect the formation of osteogenic cell types, although no direct linkage to the endogenous nanotopography of bone was described so far. I will present the presence of pores of 31.93 ± 0.97 nm diameter on the surface of collagen type I fibers, the organic component of bone, and demonstrate these pores to be sufficient to induce osteogenic differentiation of several adult human stem cell types. SiO2 nanoparticles, biomimicing 31.93 ± 0.97 nm pores, were able to induce osteogenic differentiation of stem cells in vitro also.

In addition I will show the regenerative potential of several nanomaterials to drive calvarial bone regeneration in vivo in a cell-and growth factor free manner.


Eingeladen von Prof. Dr. Oliver G. Schmidt
Kontakt Kristina Krummer

Lectures next week


Montag 16.12.2019
IFF-Doktorandenseminar14:00
Ort IFW Dresden D2E.27
Referent Johannes Schultz
Thema Investigation of Surface Plasmons in nanostructures using TEM
Eingeladen von Prof. Dr. Bernd Büchner
Kontakt

Dienstag 17.12.2019
IFF-Vortrag14:00
Ort IFW Dresden D2E.27
Referent Alexander Yu. Germov
Thema Ferromagnetic nanoregions in cubic antiferromagnet Sr1-xLaxMnO3 probed by NMR
The transition from insulator to metal state was discovered in lightly electron-doped (x~0.01) cubic single crystal manganites and discribed in the model of homogenious metallic canted antiferromagnet [Phys. Rev.B, 2010. B 82, 180409]. The formation of metallic antiferromagnet at very low doping concentrations contradicts general ideas about manganites. The latter usually are magnetically inhomogeneous systems, in which percolation of ferromagnetic regions and consiquently metallic conductivity can be reached at x>0.16. In order to study these phenomena the 87Sr,139La, 55Mn, 17O NMR have been used. This complex study gives an information about the type of magnetic inhomogeneities, charge and spin denstity distibution and clarify mechanisms the metallic conductivity.


Eingeladen von Dr. Hans-Joachim Grafe
Kontakt Christine Malbrich

Dresden Science Calendar

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