Anke Klingner - Academia.edu (original) (raw)

Papers by Anke Klingner

Research paper thumbnail of Änderung der Flüssigkeitsmorphologie durch elektrische Felder zur Anwendung in der Mikrofluidik /

Publikationsansicht. 31674338. Änderung der Flüssigkeitsmorphologie durch elektrische Felder zu... more Publikationsansicht. 31674338. Änderung der Flüssigkeitsmorphologie durch elektrische Felder zur Anwendung in der Mikrofluidik / (2004). Klingner, Anke. Abstract. Ulm, Universiẗat, Diss., 2004. Details der Publikation. Download, http://worldcat.org/oclc/76668138. ...

Research paper thumbnail of Electrospun Carboxymethyl Chitosan Nanofibers for Antibacterial Activity for Wound Healing

Journal of Textile and Apparel Technology and Management, May 19, 2015

Research paper thumbnail of Carboxymethyl Chitosan Electrospun Nanofibers: Preparation and its Antibacterial Activity

Research paper thumbnail of In-situ injectable thermosensitive gel based on poloxamer as a new carrier for tamoxifen citrate

International Journal of Pharmacy and Pharmaceutical Sciences

Research paper thumbnail of Self-excited oscillatory dynamics of capillary bridges in electric fields

Applied Physics Letters, 2003

ABSTRACT We studied the stability of capillary bridges between flat, parallel, and dielectrically... more ABSTRACT We studied the stability of capillary bridges between flat, parallel, and dielectrically coated electrodes as a function of the voltage applied between them. The stability limits of the capillary bridge state and the state consisting of two separated droplets are shifted with respect to ordinary capillary hysteresis at zero voltage. Surprisingly, we found that the system can oscillate periodically between the two states within a certain range of applied voltage and electrode separation. These oscillations could be applied to promote mixing in electrowetting-based microfluidic devices. We present a model based on the balance between interfacial and electrostatic energies, which explains the experimental findings quantitatively. © 2003 American Institute of Physics.

Research paper thumbnail of Magnetic propulsion of robotic sperms at low-Reynolds number

Applied Physics Letters, 2016

Research paper thumbnail of Disturbance observer-based motion control of paramagnetic microparticles against time-varying flow rates

2016 6th IEEE International Conference on Biomedical Robotics and Biomechatronics (BioRob), 2016

Research paper thumbnail of Targeting of cell mockups using sperm-shaped microrobots in vitro

2016 6th IEEE International Conference on Biomedical Robotics and Biomechatronics (BioRob), 2016

Research paper thumbnail of In situ thermosensitive Tamoxifen citrate loaded hydrogels: An effective tool in breast cancer loco-regional therapy

Journal of Drug Delivery Science and Technology, 2016

Research paper thumbnail of Robust and Optimal Control of Magnetic Microparticles Inside Fluidic Channels with Time-varying Flow Rates

International Journal of Advanced Robotic Systems, 2016

Research paper thumbnail of Sperm-shaped magnetic microrobots: Fabrication using electrospinning, modeling, and characterization

2016 IEEE International Conference on Robotics and Automation (ICRA), 2016

Research paper thumbnail of Magnetic-Based Motion Control of a Helical Robot using Two Synchronized Rotating Dipole Fields

This work addresses the magnetic-based control of a helical robot and the mitigation of the magne... more This work addresses the magnetic-based control of a helical robot and the mitigation of the magnetic forces on its dipole moment during radial steering using rotating permanent magnets. A magnetic system with two synchronized permanent magnets that rotate quasistatically is used to move the helical robot (length and diameter of 12.5 mm and 4 mm, respectively). We experimentally demonstrate that using two synchronized permanent magnets for radial steering of a helical robot achieves higher motion stability, as opposed to propulsion using single rotating dipole field. The two synchronized dipole fields decrease the lateral oscillation (average peak-to-peak amplitude) of the helical robot by 37%, compared to the radial steering using a single dipole field at angular velocity of 31 rad/s. We also show that driving the helical robot using two synchronized rotating magnets achieves average swimming speed of 2.1 mm/s, whereas the single rotating dipole field achieves average swimming speed of 0.4 mm/s at angular velocity of 31 rad/s for the rotating permanent magnets. The proposed configuration of the helical propulsion allows us to decrease the magnetic forces that could cause tissue damage or potential trauma for in vivo applications.

Research paper thumbnail of OPTICAL PROPERTIES of PMMA / DYE COMPOSITE IRRADIATED with LASER

Research paper thumbnail of Non-Contact manipulation of microbeads via pushing and pulling using magnetically controlled clusters of paramagnetic microparticles

2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2015

Research paper thumbnail of Propulsion and steering of helical magnetic microrobots using two synchronized rotating dipole fields in three-dimensional space

2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2015

Research paper thumbnail of Electrospun Nanofibers with Rough Surface

Research paper thumbnail of Corrosion inhibition of iron by polystyrene polymeric nanofibers

Recently, nanofibers and their applications have received a significant interest particularly in ... more Recently, nanofibers and their applications have received a significant interest particularly in coating purposes. The aim of this paper is to modify surface properties of materials using polymeric nanofibers. Nanofibers were deposited on iron surface by electrospinning. Electrospinning is a relatively simple and efficient technique to produce submicron to nanometer fibers from solutions of polymers. In our case polystyrene (PS) was used. Different tests such as scanning electron microscopy (SEM) and contact angle were conducted to characterize the nanofibers. Corrosion behaviour of iron covered with different amount of nanofibers indicated by deposition time was measured in 3.5% NaCl solution. The stability of the passive nanofibers layer was investigated using Tafel polarization curves and potential cyclic measurements. The results were compared with non-coated iron and iron coated with casted polymeric fi lm. An increase of the corrosion resistance was recorded as transition from...

Research paper thumbnail of The Effect of Additives on the Surface Morphology and Dielectric Properties of Pva Based Electrospun Nanofibers

Research paper thumbnail of Stressed States and Self-Organized Structuring of W/C Multilayers

MRS Proceedings, 2001

After aging at room temperature for several months W/C multilayers (20 periods, single layer thic... more After aging at room temperature for several months W/C multilayers (20 periods, single layer thicknesses in the nanometer range) grown on Si-(111) substrates by pulsed laser deposition (PLD) developed homogeneously wrinkled surfaces. Their structures were studied by optical microscopy, atomic force microscopy and X-ray diffractometry. Typical dimensions of debonded areas are some 100 µm in length, about 40 µm in width and 2-3 µm in height. The formation of wrinkles is accompanied by an increase in the free surface by 1%-2%. Stress relaxation is considered the driving force of this phenomenon.

Research paper thumbnail of Magnetic-based motion control of a helical robot using two synchronized rotating dipole fields

5th IEEE RAS/EMBS International Conference on Biomedical Robotics and Biomechatronics, 2014

This work addresses the magnetic-based control of a helical robot and the mitigation of the magne... more This work addresses the magnetic-based control of a helical robot and the mitigation of the magnetic forces on its dipole moment during radial steering using rotating permanent magnets. A magnetic system with two synchronized permanent magnets that rotate quasistatically is used to move the helical robot (length and diameter of 12.5 mm and 4 mm, respectively). We experimentally demonstrate that using two synchronized permanent magnets for radial steering of a helical robot achieves higher motion stability, as opposed to propulsion using single rotating dipole field. The two synchronized dipole fields decrease the lateral oscillation (average peak-to-peak amplitude) of the helical robot by 37%, compared to the radial steering using a single dipole field at angular velocity of 31 rad/s. We also show that driving the helical robot using two synchronized rotating magnets achieves average swimming speed of 2.1 mm/s, whereas the single rotating dipole field achieves average swimming speed of 0.4 mm/s at angular velocity of 31 rad/s for the rotating permanent magnets. The proposed configuration of the helical propulsion allows us to decrease the magnetic forces that could cause tissue damage or potential trauma for in vivo applications.

Research paper thumbnail of Änderung der Flüssigkeitsmorphologie durch elektrische Felder zur Anwendung in der Mikrofluidik /

Publikationsansicht. 31674338. Änderung der Flüssigkeitsmorphologie durch elektrische Felder zu... more Publikationsansicht. 31674338. Änderung der Flüssigkeitsmorphologie durch elektrische Felder zur Anwendung in der Mikrofluidik / (2004). Klingner, Anke. Abstract. Ulm, Universiẗat, Diss., 2004. Details der Publikation. Download, http://worldcat.org/oclc/76668138. ...

Research paper thumbnail of Electrospun Carboxymethyl Chitosan Nanofibers for Antibacterial Activity for Wound Healing

Journal of Textile and Apparel Technology and Management, May 19, 2015

Research paper thumbnail of Carboxymethyl Chitosan Electrospun Nanofibers: Preparation and its Antibacterial Activity

Research paper thumbnail of In-situ injectable thermosensitive gel based on poloxamer as a new carrier for tamoxifen citrate

International Journal of Pharmacy and Pharmaceutical Sciences

Research paper thumbnail of Self-excited oscillatory dynamics of capillary bridges in electric fields

Applied Physics Letters, 2003

ABSTRACT We studied the stability of capillary bridges between flat, parallel, and dielectrically... more ABSTRACT We studied the stability of capillary bridges between flat, parallel, and dielectrically coated electrodes as a function of the voltage applied between them. The stability limits of the capillary bridge state and the state consisting of two separated droplets are shifted with respect to ordinary capillary hysteresis at zero voltage. Surprisingly, we found that the system can oscillate periodically between the two states within a certain range of applied voltage and electrode separation. These oscillations could be applied to promote mixing in electrowetting-based microfluidic devices. We present a model based on the balance between interfacial and electrostatic energies, which explains the experimental findings quantitatively. © 2003 American Institute of Physics.

Research paper thumbnail of Magnetic propulsion of robotic sperms at low-Reynolds number

Applied Physics Letters, 2016

Research paper thumbnail of Disturbance observer-based motion control of paramagnetic microparticles against time-varying flow rates

2016 6th IEEE International Conference on Biomedical Robotics and Biomechatronics (BioRob), 2016

Research paper thumbnail of Targeting of cell mockups using sperm-shaped microrobots in vitro

2016 6th IEEE International Conference on Biomedical Robotics and Biomechatronics (BioRob), 2016

Research paper thumbnail of In situ thermosensitive Tamoxifen citrate loaded hydrogels: An effective tool in breast cancer loco-regional therapy

Journal of Drug Delivery Science and Technology, 2016

Research paper thumbnail of Robust and Optimal Control of Magnetic Microparticles Inside Fluidic Channels with Time-varying Flow Rates

International Journal of Advanced Robotic Systems, 2016

Research paper thumbnail of Sperm-shaped magnetic microrobots: Fabrication using electrospinning, modeling, and characterization

2016 IEEE International Conference on Robotics and Automation (ICRA), 2016

Research paper thumbnail of Magnetic-Based Motion Control of a Helical Robot using Two Synchronized Rotating Dipole Fields

This work addresses the magnetic-based control of a helical robot and the mitigation of the magne... more This work addresses the magnetic-based control of a helical robot and the mitigation of the magnetic forces on its dipole moment during radial steering using rotating permanent magnets. A magnetic system with two synchronized permanent magnets that rotate quasistatically is used to move the helical robot (length and diameter of 12.5 mm and 4 mm, respectively). We experimentally demonstrate that using two synchronized permanent magnets for radial steering of a helical robot achieves higher motion stability, as opposed to propulsion using single rotating dipole field. The two synchronized dipole fields decrease the lateral oscillation (average peak-to-peak amplitude) of the helical robot by 37%, compared to the radial steering using a single dipole field at angular velocity of 31 rad/s. We also show that driving the helical robot using two synchronized rotating magnets achieves average swimming speed of 2.1 mm/s, whereas the single rotating dipole field achieves average swimming speed of 0.4 mm/s at angular velocity of 31 rad/s for the rotating permanent magnets. The proposed configuration of the helical propulsion allows us to decrease the magnetic forces that could cause tissue damage or potential trauma for in vivo applications.

Research paper thumbnail of OPTICAL PROPERTIES of PMMA / DYE COMPOSITE IRRADIATED with LASER

Research paper thumbnail of Non-Contact manipulation of microbeads via pushing and pulling using magnetically controlled clusters of paramagnetic microparticles

2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2015

Research paper thumbnail of Propulsion and steering of helical magnetic microrobots using two synchronized rotating dipole fields in three-dimensional space

2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2015

Research paper thumbnail of Electrospun Nanofibers with Rough Surface

Research paper thumbnail of Corrosion inhibition of iron by polystyrene polymeric nanofibers

Recently, nanofibers and their applications have received a significant interest particularly in ... more Recently, nanofibers and their applications have received a significant interest particularly in coating purposes. The aim of this paper is to modify surface properties of materials using polymeric nanofibers. Nanofibers were deposited on iron surface by electrospinning. Electrospinning is a relatively simple and efficient technique to produce submicron to nanometer fibers from solutions of polymers. In our case polystyrene (PS) was used. Different tests such as scanning electron microscopy (SEM) and contact angle were conducted to characterize the nanofibers. Corrosion behaviour of iron covered with different amount of nanofibers indicated by deposition time was measured in 3.5% NaCl solution. The stability of the passive nanofibers layer was investigated using Tafel polarization curves and potential cyclic measurements. The results were compared with non-coated iron and iron coated with casted polymeric fi lm. An increase of the corrosion resistance was recorded as transition from...

Research paper thumbnail of The Effect of Additives on the Surface Morphology and Dielectric Properties of Pva Based Electrospun Nanofibers

Research paper thumbnail of Stressed States and Self-Organized Structuring of W/C Multilayers

MRS Proceedings, 2001

After aging at room temperature for several months W/C multilayers (20 periods, single layer thic... more After aging at room temperature for several months W/C multilayers (20 periods, single layer thicknesses in the nanometer range) grown on Si-(111) substrates by pulsed laser deposition (PLD) developed homogeneously wrinkled surfaces. Their structures were studied by optical microscopy, atomic force microscopy and X-ray diffractometry. Typical dimensions of debonded areas are some 100 µm in length, about 40 µm in width and 2-3 µm in height. The formation of wrinkles is accompanied by an increase in the free surface by 1%-2%. Stress relaxation is considered the driving force of this phenomenon.

Research paper thumbnail of Magnetic-based motion control of a helical robot using two synchronized rotating dipole fields

5th IEEE RAS/EMBS International Conference on Biomedical Robotics and Biomechatronics, 2014

This work addresses the magnetic-based control of a helical robot and the mitigation of the magne... more This work addresses the magnetic-based control of a helical robot and the mitigation of the magnetic forces on its dipole moment during radial steering using rotating permanent magnets. A magnetic system with two synchronized permanent magnets that rotate quasistatically is used to move the helical robot (length and diameter of 12.5 mm and 4 mm, respectively). We experimentally demonstrate that using two synchronized permanent magnets for radial steering of a helical robot achieves higher motion stability, as opposed to propulsion using single rotating dipole field. The two synchronized dipole fields decrease the lateral oscillation (average peak-to-peak amplitude) of the helical robot by 37%, compared to the radial steering using a single dipole field at angular velocity of 31 rad/s. We also show that driving the helical robot using two synchronized rotating magnets achieves average swimming speed of 2.1 mm/s, whereas the single rotating dipole field achieves average swimming speed of 0.4 mm/s at angular velocity of 31 rad/s for the rotating permanent magnets. The proposed configuration of the helical propulsion allows us to decrease the magnetic forces that could cause tissue damage or potential trauma for in vivo applications.