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Publications | Characterization

2015

Debye-Based Frequency-Domain Magnetization Model for Magnetic Nanoparticles in Magnetic Particle Spectroscopy
Thilo Wawrzik, Takashi Yoshida, Meinhard Schilling, Frank Ludwig
IEEE Trans Magn. 51, 5300404, 2015
doi: 10.1109/TMAG.2014.2332371

Effective particle magnetic moment of multi-core particles
Fredrik Ahrentorp, Andrea Astalan, Jakob Blomgren, Christian Jonasson, Erik Wetterskog, Peter Svedlindh, Aidin Lak, Frank Ludwig, Leo J. van Ijzendoorn, Fritz Westphal, Cordula Grüttner, Nicole Gehrke, Stefan Gustafsson, Eva Olsson and Christer Johansson
J. Magn. Magn. Mater., 380, 221–226, 2015
doi:10.1016/j.jmmm.2014.09.070

Magnetic characterization of clustered core magnetic nanoparticles for MPI
Nicole Gehrke, David Heinke, Dietmar Eberbeck, Frank Ludwig, Thilo Wawrzik, Christian Kuhlmann, Briel Andreas
IEEE Trans. Magn. 51, 5300204, 2015
doi: 10.1109/TMAG.2014.2358275

Magnetic Field Exposure Assessment in Electric Vehicles
Andrea Vassilev, Alain Ferber, Christof Wehrmann, Olivier Pinaud, Meinhard Schilling, and Alastair R. Ruddle
IEEE Trans. Electromag. Comp., 35-43, 2015
DOI: 10.1109/TEMC.2014.2359687

Resolving particle size modality in bi-modal iron oxide nanoparticle suspensions
Aidin Lak, Andreas F. Thünemann, Meinhard Schilling, Frank Ludwig
J. Magn. Magn. Mater., 380, 140–143, 2015
doi:10.1016/j.jmmm.2014.08.050

Single-core magnetic markers in rotating magnetic field based homogeneous bioassays and the law of mass action
Jan Dieckhoff, Stefan Schrittwieser, Joerg Schotter, Hilke Remmer, Meinhard Schilling, Frank Ludwig
J. Magn. Magn. Mater., 380, 205–208, 2015
doi:10.1016/j.jmmm.2014.10.088

Suitability of magnetic single- and multi-core nanoparticles to detect protein binding with dynamic magnetic measurement techniques
Hilke Remmer, Jan Dieckhoff, Meinhard Schilling, Frank Ludwig
J. Magn. Magn. Mater., 380, 236–240, 2015
doi: 10.1016/j.jmmm.2014.10.087

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2014

Dynamic magnetic properties of optimized magnetic nanoparticles for magnetic particle imaging
Frank Ludwig, Christian Kuhlmann, Thilo Wawrzik, Jan Dieckhoff, Aidin Lak, Amit P. Khandhar, Richard M. Ferguson, Scott J. Kemp, Kannan M. Krishnan
IEEE Trans. Magn., Vol. 50, 5101804, 2014
DOI: 10.1109/TMAG.2014.2329504

Magnetic marker based homogeneous bioassays utilizing rotating magnetic fields
Jan Dieckhoff, Meinhard Schilling, Frank Ludwig
Appl. Phys. A, Volume 115, 17B304, 2014
DOI: http://dx.doi.org/10.1063/1.4862943

Magnetic, structural and particle size analysis of single- and multi-core magnetic nanoparticles
F. Ludwig, O. Kazakova, L. Fernández Barquín, A. Fornara, L. Trahms, U. Steinhoff, P. Svedlindh, E. Wetterskog, Q. A. Pankhurst, P. Southern, P. Morales, M. F. Hansen, C. Frandsen, E. Olsson, S. Gustafsson, N. Gehrke, K. Lüdtke-Buzug, C. Grüttner, C. Jonasson, and C. Johansson
IEEE Trans. Magn. 50, 5300204, 2014

Protein detection with magnetic nanoparticles in a rotating magnetic field
Jan Dieckhoff, Aidin Lak, Meinhard Schilling, Frank Ludwig
Appl. Phys. A, Volume 115, 024701, 2014
DOI: http://dx.doi.org/10.1063/1.4861032

Self-consistent magnetic properties of magnetite tracers optimized for magnetic particle imaging measured by ac susceptometry, magnetorelaxometry and magnetic particle spectroscopy
F. Ludwig, H. Remmer, C. Kuhlmann, T. Wawrzik, H. Arami, R. M. Ferguson, and K. M. Krishnan
in: J. Magn. Magn. Mater. 360, 169-173, 2014

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2013

A 3D MPI system for biological studies on mice
Christian Kuhlmann, Thilo Wawrzik, Frank Ludwig, Meinhard Schilling
International Workshop on Magnetic Particle Imaging, IWMPI 2013, Berkeley, CA art.no. 6528373, IEEE XPlore - 2013
DOI:10.1109/IWMPI.2013.6528373

Characterization of magnetic nanoparticle systems with respect to their magnetic particle imaging performance
Frank Ludwig, Dietmar Eberbeck, Norbert Löwa, Uwe Steinhoff, Thilo Wawrzik, Meinhard Schilling, Lutz Trahms
Biomed Tech (Berl). 2013 Dec;58(6):535-45.
DOI: 10.1515/bmt-2013-0013

Effect of Brownian relaxation in frequency-dependent Magnetic Particle Spectroscopy measurements
Thilo Wawrzik, Christian Kuhlmann, Hilke Remmer, Nicole Gehrke, Andreas Briel, Meinhard Schilling, Frank Ludwig
International Workshop on Magnetic Particle Imaging, IWMPI 2013, Berkeley, CA art.no. 6528371, IEEE XPlore - 2013
DOI: 10.1109/IWMPI.2013.6528371

Estimating particle mobility in MPI
Thilo Wawrzik, Christian Kuhlmann, Frank Ludwig, Meinhard Schilling
International Workshop on Magnetic Particle Imaging, IWMPI 2013, Berkeley, CA art.no. 6528372, IEEE XPlore - 2013
DOI: 10.1109/IWMPI.2013.6528372

Highly stable monodisperse PEGylated iron oxide nanoparticle aqueous suspensions: a nontoxic tracer for homogeneous magnetic bioassays  
Aidin Lak, Frank Ludwig, Jan Dieckhoff, Jan M. Scholtyssek, Oliver Goldmann, Heinrich Lünsdorf, Dietmar Eberbeck, Andreas Kornowski, Matthias Kraken, Fred J. Litterst, Kathrin Fiege, Petra Mischnick, Meinhard Schilling
Nanoscale, Volume 5, page 11447 - 2013
DOI: 10.1039/C3NR02197A

Motion artefact detection in capacitively coupled EEG recording
Christof Wehrmann, Marlene Langer, Meinhard Schilling
Biomedical Engineering / Biomedizinische Technik, Volume 2013 - 2013
DOI: 10.1515/bmt-2013-4165

Scanner setup and reconstruction for three-dimensional magnetic particle imaging  
Thilo Wawrzik, Christian Kuhlmann, Frank Ludwig, Meinhard Schilling
Proceedings of SPIE 8672, 86721B - 2013
DOI:10.1117/12.2006392

Size Distribution and Magnetization Optimization of Single-Core Iron Oxide Nanoparticles by Exploiting Design of Experiment Methodology
Aidin Lak, Frank Ludwig, Jan M. Scholtyssek, Jan Dieckhoff, Kathrin Fiege, Meinhard Schilling, IEEE Trans. Magn., 49, 2013, 201-207
DOI: 10.1109/TMAG.2012.2224325

Size dependent structural and magnetic properties of FeO-F3O4 nanoparticles
Aidin Lak, Matthias Kraken, Frank Ludwig, Andreas Kornowski, Dietmar Eberbeck, Sibylle Sievers, Fred J. Litterst, Horst Weller, Meinhard Schilling
Nanoscale - 2013
DOI:10.1039/c3nr04562e

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2012

Characterization of Magnetic Nanoparticles for Magnetic Particle Imaging by Magnetorelaxometry, AC Susceptibility, Magnetic Particle Spectroscopy and Static Magnetization Measurements
Frank Ludwig, Thilo Wawrzik, Meinhard Schilling
Magnetic Particle Imaging, Springer Proceedings in Physics, Volume 140, 35–40, 2012

Impedanzpektroskopie an Photovoltaikanlagen
Sebastian Bieniek
Dissertation TU Braunschweig, 2012

Magnetic fluid dynamics in a rotating magnetic field
Takashi Yoshida, Keiji Enpuku, Jan Dieckhoff, Meinhard Schilling, Frank Ludwig
J. Appl. Phys., Volume 111, 053901-1-10, 2012
http://dx.doi.org/10.1063/1.3688254

New Perspectives for MPI: A Toolbox for Tracer Research
Nicole Gehrke, Andreas Briel, Frank Ludwig, Hilke Remmer, Thilo Wawrzik, Stefan Wellert
Magnetic Particle Imaging, Volume 140, 99–103, 2012

Optimization of magnetic nanoparticles for magnetic particle imaging
Frank Ludwig, Thilo Wawrzik, Takashi Yoshida, Nicole Gehrke, Andreas Briel, Dietmar Eberbeck, Meinhard Schilling
IEEE Trans. Magn., Volume 48, 3780–3783, 2012
DOI: http://dx.doi.org/10.1109/TMAG.2012.2197601

Perspectives of magnetic particle spectroscopy for magnetic nanoparticle characterization
Thilo Wawrzik, Meinhard Schilling, Frank Ludwig
Magnetic Particle Imaging, Springer Proceedings in Physics, Volume 140, 41–45, 2012

Synthesis of Single-Core Iron Oxide Nanoparticles as a Potential Tracer for Magnetic Particle Imaging
Aidin Lak, Thilo Wawrzik, Frank Ludwig, Meinhard Schilling
Magnetic Particle Imaging, Springer Proceedings in Physics, Volume 140, 91–95, 2012

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2011

Fluxgate based detection of magnetic nanoparticle dynamics in a rotating magnetic field
Jan Dieckhoff, Meinhard Schilling, Frank Ludwig
Applied Physics Letters, 2011, 99, 112501-1-3, 2011
doi:10.1063/1.3639276

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2010

Characterization of Magnetic Core-Shell Nanoparticle Suspensions Using ac Susceptibility for Frequencies up to 1 MHz
F. Ludwig
AIP Conference Proceedings Vol. 1311, 249–254, 2010

Determination of core and hydrodynamic size distributions of CoFe2O4 nanoparticle suspensions using ac susceptibility measurements
Frank Ludwig, Alexander Guillaume, Meinhard Schilling, Natalia Frickel, Annette M. Schmidt
J. Appl. Phys., Volume 108, 033918-1–5, 2010, doi:10.1063/1.3463350

Influence of Synthesis Parameters on Magnetization and Size of Iron Oxide Nanoparticles
A. Lak, F. Ludwig, I.-M. Grabs, G. Garnweitner and M. Schilling
AIP Conference Proceedings Vol. 1311, 224–230 (2010)

Magnetic particle spectroscopy for the evaluation of eld-dependent harmonics generation
T. Wawrzik, J. Hahn, F. Ludwig and M. Schilling
Magnetic Nanoparticles – Particle Science, Imaging Technology, and Clinical Applications,
Proceedings of First International Workshop on Magnetic Particle Imaging, World Scientific 2010, 86–91, 2010
doi: 10.1142/9789814324687_0012

Multivariate Magnetic Particle Spectroscopy for Magnetic Nanoparticle Characterization
T. Wawrzik, F. Ludwig and M. Schilling
AIP Conference Proceedings Vol. 1311, 267–270, 2010

Two-dimensional magnetic particle imaging
T. Wawrzik, F. Ludwig and M. Schilling
Magnetic Nanoparticles – Particle Science, Imaging Technology, and Clinical Applications, Proceedings of First International Workshop on Magnetic Particle Imaging, World Scientific 2010, 100–105, 2010

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2009

Assembly for One-dimensional Magnetic Particle Imaging
Thilo Wawrzik, Frank Ludwig, Meinhard Schilling
IFMBE Proceedings, Volume 25/II, 898–900, 2009

Characterization of magnetic core-shell nanoparticles by fluxgate magnetorelaxometry, ac susceptibility, transmission electron microscopy and photon correlation spectroscopy – a comparative study
Frank Ludwig, Erik Heim, Meinhard Schilling
J. Magn. Magn. Mater., Volume 321, 1644–1647, 2009

Comparison and calibration of fluxgate and SQUID magnetorelaxometry techniques for the characterization of magnetic core-shell nanoparticles
Frank Ludwig, Erik Heim, Dietmar Eberbeck, Kay Schwarz, Lutz Trahms, Meinhard Schilling
IEEE Trans. Magn., Volume 45, Number 10, 4857–4860, 2009

Fluxgate-Magnetrelaxometrie magnetischer Nanopartikel in der Bioanalytik
Erik Heim
Dissertation. TU Braunschweig 2009. ISBN: 3 86664 722 0.
http://www.digibib.tu-bs.de/?docid=00030987

Magnetorelaxometry of nanoparticles using a GMI magnetometer
B. Dufay, Sebastian Saez, Matthieu Denoual, Christophe Dolabdjian, Frank Ludwig, Erik Heim, Meinhard Schilling, L. Melo, David Menard, A. Yelon
Sensor Letters, Volume 7, 429–432, 2009

Quantitative and Qualitative Characterization of Magnetic Nanoparticles by Magnetorelaxometry using a laboratory MRX-Analyzer
Erik Heim, Marianne Gerloff, Frank Ludwig, Meinhard Schilling
IFMBE Proceedings, Volume 25/VII, 650–652, 2009

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2008

Characterization of superparamagnetic Fe3O4 nanoparticles by fluxgate magnetorelaxometry for use in biomedical applications 
Frank Ludwig, Erik Heim, Meinhard Schilling, Keiji Enpuku
J. Appl. Phys., Volume 103, Number 7, 07A314-1–3, 2008

Fluxgate magnetorelaxometry for characterization of hydrogel polymerization kinetics and physical entrapment capacity
Erik Heim, Steffen Harling, Frank Ludwig, Henning Menzel, Meinhard Schilling
J. Phys.: Condens. Matter, Volume 20, 2008, 204106-1–5

Influence of polymeric additives on biomimetic silica deposition on patterned microstructures
Olaf Helmecke, Alexander Hirsch, Peter Behrens, Henning Menzel
Journal of Colloid and Interface Science, Volume 321, 44, 2008

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2007

Characterization of superparamagnetic nanoparticles by analyzing the magnetization and relaxation dynamics using fluxgate magnetometers
Frank Ludwig, Erik Heim, Meinhard Schilling
J. Appl. Phys., Volume 101, Number 11, 113909-1–10, 2007, doi: 10.1063/1.2738416

Fluxgate magnetorelaxometry of superparamagnetic nanoparticles for hydrogel characterization
Erik Heim, Steffen Harling, Kai Pöhlig, Meinhard Schilling, Frank Ludwig, Henning Menzel
J. Magn. Magn. Mater., Volume 311, Number 1, 150–154, 2007

Liquid phase immunoassay using magnetic markers and superconducting quantum interference device
Keiji Enpuku, Tsuyoshi Tanaka, Takashi Matsuda, Hiroyuki Kuma, Feng Dang, Naoya Enomoto, Junichi Hojo, Kohji Yoshinaga, Frank Ludwig, Fatemeh Ghaffari, Erik Heim, Meinhard Schilling
Japanese Journal of Applied Physics, Volume 46, Number 11, 7524–7529, 2007

Magnetic Nanoparticle Analyzer for Magnetic Nanoparticle Characterization and Binding Assays  
Erik Heim, Frank Ludwig, Rainer Piel, Meinhard Schilling, Wenzhong Liu
Biomedizinische Technik, Volume 52, on CD, 2007

Properties of magnetic nanoparticles in the Brownian relaxation range for liquid phase immunoassays
Keiji Enpuku, Tsuyoshi Tanaka, Takashi Matsuda, Feng Dang, Naoya Enomoto, Junichi Hojo, Kohji Yoshinaga, Frank Ludwig, Fatemeh Ghaffari, Erik Heim, Meinhard Schilling
J. Appl. Phys., Volume 102, 054901-1–7, 2007

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2006

Investigation of superparamagnetic Fe3O4 nanoparticles by fluxgate magnetorelaxometry for use in magnetic relaxation immunoassays
Frank Ludwig, Erik Heim, Dirk Menzel, Meinhard Schilling
J. Appl. Phys., Volume 99, Number 08, 08P106-1–3, 2006

Magnetorelaxometrie magnetischer Nanoteilchen für die quantitative und spezifische Analyse von Biomolekülen
Frank Ludwig
Technisches Messen, Volume 73, Number 4, 217–222, 2006

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2005

Investigation of magnetic nanoparticles for the quantitative and specific analysis of biomolecules with magnetorelaxometry
Erik Heim, Frank Ludwig, Meinhard Schilling
Biomedizinische Technik, Volume 50, Number 1, 613–614, 2005

Magnetorelaxometrie magnetischer Nanoteilchen für die quantitative und spezifische Analyse von Biomolekülen
Frank Ludwig
XIX. Messtechnisches Symposium des AHMT e.V., 95–104, 2005

Magnetorelaxometry of magnetic nanoparticles in magnetically unshielded environment utilizing a differential fluxgate arrangement
Frank Ludwig, Sascha Mäuslelein, Erik Heim, Meinhard Schilling
Rev. Sci. Instrum., Volume 76, 106102-1–3, 2005

Magnetorelaxometry of magnetic nanoparticles with fluxgate magnetometers for the analysis of biological targets
Frank Ludwig, Erik Heim, Sascha Mäuslelein, Dietmar Eberbeck, Meinhard Schilling
J. Magn. Magn. Mater., Volume 293, 690–695, 2005

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2004

Analysis of biological target concentrations in solution by magnetorelaxometry
Erik Heim, Frank Ludwig, Meinhard Schilling
Biomedizinische Technik, Volume 49, 420–421, 2004

Magnetorelaxometry of magnetic nanoparticles – a new method for the quantitative and specific analysis of biomolecules
Frank Ludwig, Erik Heim, Meinhard Schilling
Proceedings of 2004 4th IEEE Conference on Nanotechnology (on CD), 245–247, 2004

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