Dr. Steffen Franzka

2025

Bera, Anupam; Salamon, Soma; Wende, Heiko; Franzka, Steffen; Hasselbrink, Eckart; Kenmoe, Stephane

Probing Facet Specific Interaction of 2-Propanol and CoFe₂O₄ at Near-Ambient Conditions

In: ChemPhysChem, Vol. 26, 2025, Nr. 17, e202500095

DOI

2024

Gamrad-Streubel, Lisa; Kundu, Sangita; Streich, Carmen; Ramesh, Vaijayanthi; Schielke, Andreas; Rehbock, Christoph; Cordes-Blauert, Merle; Franzka, Steffen; Klein, Sabine; Kues, Wilfried A.; Rath, Detlef; Barcikowski, Stephan

Adsorption and Distribution of Triplex-Hybridizing Bioconjugated Gold Nanoclusters Inside Spermatozoa- A Study Using Confocal Microscopy and Fluorescence Lifetime Imaging

In: ChemBioChem, Vol. 25, 2024, Nr. 23, e202400451

DOI (Open Access)
Martínez-Hincapié, Ricardo; Wegner, Jan; Anwar, Muhammad Usman; Raza-Khan, Ali; Franzka, Steffen; Kleszczynski, Stefan; Čolić, Viktor

The determination of the electrochemically active surface area and its effects on the electrocatalytic properties of structured nickel electrodes produced by additive manufacturing

In: Electrochimica Acta, Vol. 476, 2024, 143663

DOI (Open Access)

2023

Josten, Nicolas; Franzka, Steffen; Rao, Ziyuan; Smoliarova, Tatiana; Kovács, András; Scheibel, Franziska; Staab, Franziska; Acet, Mehmet; Çaklr, Asll; Durst, Karsten; Gault, Baptiste; Dunin-Borkowski, Rafal E.; Gutfleisch, Oliver; Farle, Michael

Location and morphology of ferromagnetic precipitates in Ni-Mn-Sn

In: Physical Review Materials, Vol. 7, 2023, Nr. 12, 124411

DOI (Open Access)
Kriegel, Marko A.; Omambac, Karim; Franzka, Steffen; Meyer zu Heringdorf, Frank; Horn-von Hoegen, Michael

Incommensurability and negative thermal expansion of single layer hexagonal boron nitride

In: Applied Surface Science, Vol. 624, 2023, 157156

DOI
Bera, Anupam; Bullert, Denise; Linke, Matthias; Franzka, Steffen; Hagemann, Ulrich; Hartmann, Nils; Hasselbrink, Eckart

Interaction of 2-propanol with predominantly SrO- and TiO2-terminated SrTiO3(100) surfaces studied by vibrational sum frequency spectroscopy

In: Catalysis Science and Technology, Vol. 13, 2023, Nr. 17, pp. 4988 – 4995

DOI (Open Access)
Tjaberings, Stefanie; Heidelmann, Markus; Franzka, Steffen; Gröschel, André H.

Multicompartment Nanostructures as Templates for Multimetallic Hybrid Materials

In: Small Science, Vol. 3, 2023, Nr. 9, 2300071

DOI (Open Access)

2022

Ganter, Domenic; Franzka, Steffen; Shvartsman, Vladimir; Lupascu, Doru C.

The phenomenon of bitumen ‘bee' structures–bulk or surface layer–a closer look

In: International Journal of Pavement Engineering, Vol. 23, 2022, Nr. 6, pp. 1768 – 1776

DOI

2021

Sleziona, Stephan; Rauls, Simon; Heckhoff, Tobias; Christen, Leonard; Pollmann, Erik; Madauß, Lukas; Franzka, Steffen; Lorke, Axel; Wende, Heiko; Schleberger, Marika

Towards field-effect controlled graphene-enhanced Raman spectroscopy of cobalt octaethylporphyrin molecules

In: Nanotechnology, Vol. 32, 2021, Nr. 20, pp. 205702

DOI (Open Access)
Steinhaus, Andrea; Srivastva, Deepika; Qiang, Xiaolian; Franzka, Steffen; Nikoubashman, Arash; Gröschel, André

Controlling Janus Nanodisc Topology through ABC Triblock Terpolymer/Homopolymer Blending in 3D Confinement

In: Macromolecules, Vol. 54, 2021, Nr. 3, pp. 1224 – 1233

DOI
Qiang, Xiaolian; Franzka, Steffen; Quintieri, Giada; Dai, Xuezhi; Wong, Chin Ken; Gröschel, André

Size‐Controlled Formation of Polymer Janus Discs

In: Angewandte Chemie International Edition, Vol. 60, 2021, Nr. 40, pp. 21668 – 21672

DOI (Open Access)

2020

Qiang, Xiaolian; Franzka, Steffen; Dai, Xuezhi; Gröschel, André

Multicompartment Microparticles of SBT Triblock Terpolymers through 3D Confinement Assembly

In: Macromolecules, Vol. 53, 2020, Nr. 11, pp. 4224 – 4233

DOI
Tjaberings, Stefanie; Heidelmann, Markus; Tjaberings, Alexander; Steinhaus, Andrea; Franzka, Steffen; Walkenfort, Bernd; Gröschel, André

Terpolymer Multicompartment Nanofibers as Templates for Hybrid Pt Double Helices

In: ACS Applied Materials & Interfaces, Vol. 12, 2020, Nr. 35, pp. 39586 – 39594

DOI

2017

Schade, Martin; Franzka, Steffen; Hartmann, Nils

Laser-Induced Functionalization of Organo/Carbon Interfaces for Selective Adsorption of Au Nanoparticles in Microsized Domains

In: Langmuir, Vol. 33, 2017, Nr. 35, pp. 8686 – 8692

DOI

2016

Dundua, Alexander; Franzka, Steffen; Ulbricht, Mathias

Improved Antifouling Properties of Polydimethylsiloxane Films via Formation of Polysiloxane/Polyzwitterion Interpenetrating Networks

In: Macromolecular Rapid Communications, Vol. 37, 2016, Nr. 24, pp. 2030 – 2036

DOI
Schade, Linda; Franzka, Steffen; Thomas, Marc; Hagemann, Ulrich; Hartmann, Nils

Resonant laser processing of nanoparticulate Au/TiO2 films on glass supports : Photothermal modification of a photocatalytic nanomaterial

In: Surface Science, Vol. 650, 2016, pp. 57 – 63

DOI
Schade, Lina; Franzka, Steffen; Biener, Monica; Biener, Jürgen; Hartmann, Nils

Surface-enhanced Raman spectroscopy on laser-engineered ruthenium dye-functionalized nanoporous gold

In: Applied Surface Science, Vol. 374, 2016, pp. 19 – 22

DOI

2015

Hartmann, Nils; Franzka, Steffen; Schröter, Anja; Aumann, Andreas; Ostendorf, Andreas

Nonlinear processing and multiphoton ablation of self-assembled monolayers for application as ultrathin resists and in biochemical sensors

In: Optically Induced Nanostructures: Biomedical and Technical Applications / König, Karsten; Ostendorf, Andreas (Eds.). Berlin [u.a.]: de Gruyter, 2015, pp. 117 – 139

DOI
Thomas, Marc; Gajda, Martyna; Naini, Crispin Amiri; Franzka, Steffen; Ulbricht, Mathias; Hartmann, Nils

Poly(N,N-dimethylaminoethyl methacrylate) Brushes : pH-Dependent Switching Kinetics of a Surface-Grafted Thermoresponsive Polyelectrolyte

In: Langmuir, Vol. 31, 2015, Nr. 49, pp. 13426 – 13432

DOI
Schade, Martin; Franzka, Steffen; Cappuccio, Franco; Peinecke, Volker; Heinzel, Angelika; Hartmann, Nils

Photothermally induced bromination of carbon/polymer bipolar plate materials for fuel cell applications

In: Applied Surface Science, Vol. 336, 2015, pp. 85 – 88

DOI
Schade, Lina; Franzka, Steffen; Dzialkowski, Kevin; Hardt, Sebastian; Wiggers, Hartmut; Reichenberger, Sven; Wagener, Philipp; Hartmann, Nils

Resonant photothermal laser processing of hybrid gold/titania nanoparticle films

In: Applied Surface Science, Vol. 336, 2015, pp. 48 – 52

DOI

2014

Maragkaki, S.; Aumann, A.; Schulz, Florian; Schröter, A.; Schöps, B.; Franzka, Steffen; Hartmann, Nils; Ostendorf, A. (Eds.)

Micro-patterning of self-assembled organic monolayers by using tunable ultrafast laser pulses

In: Frontiers in ultrafast optics: biomedical, scientific, and industrial applications XIV / SPIE photonics west , 2 - 5 February 2014, San Francisco, California, United States. Bellingham, Wash.: SPIE, 2014

DOI
Schade, Martin; Franzka, Steffen; Schröter, Anja; Cappuccio, Franco; Gajda, Martyna; Peinecke, Volker; Heinzel, Angelika; Hartmann, Nils

Chemical functionalization of carbon/polymer bipolar plate materials via oxygen plasma activation and subsequent silanization

In: Surface and Coatings Technology, Vol. 240, 2014, pp. 255 – 260

DOI
Hess, Christian; Schwenke, Andreas; Wagener, Philipp; Franzka, Steffen; Sajti, Csaba Laszlo; Pflaum, Michael; Wiegmann, Bettina; Haverich, Axel; Barcikowski, Stephan

Dose-dependent surface endothelialization and biocompatibility of polyurethane noble metal nanocomposites

In: Journal of Biomedical Materials Research Part A, Vol. 102, 2014, Nr. 6, pp. 1909 – 1920

DOI
Stella, Kevin; Franzka, Steffen; Bürstel, Damian; Diesing, Detlef; Mayer, Dirk; Roddatis, Vladimir

Electrochemical oxidation as vertical structuring tool for ultrathin (d < 10 nm) valve metal films

In: ECS Journal of Solid State Science and Technology (JSS), Vol. 3, 2014, Nr. 5, pp. 143 – 148

DOI
Schröter, Anja; Franzka, Steffen; Hartmann, Nils

Photothermal Laser Fabrication of Micro- and Nanostructured Chemical Templates for Directed Protein Immobilization

In: Langmuir, Vol. 30, 2014, Nr. 49, pp. 14841 – 14848

DOI
Schade, Lina; Franzka, Steffen; Mathieu, Mareike; Biener, Monika M.; Biener, Jürgen; Hartmann, Nils

Photothermal laser microsintering of nanoporous gold

In: Langmuir, Vol. 30, 2014, Nr. 24, pp. 7190 – 7197

DOI
Schade, Martin; Franzka, Steffen; Schröter, Anja; Cappuccino, Franco; Peinecke, Volker; Heinzel, Angelika; Hartmann, Nils

Laser Patterning of Silanized Carbon/Polymer Bipolar Plates with Tailored Wettability for Fuel Cell Applications

In: Laser Surface Modification and Adhesion / Mittal, K. L.; Bahners, Thomas (Eds.). Hoboken, New Jersey: John Wiley and Sons, Inc, 2014, pp. 263 – 287

2013

Behrenberg, Dennis; Franzka, Steffen; Petermann, Nils; Wiggers, Hartmut; Hartmann, Nils

Fabrication of periodic surface topographies via sequential photothermal laser microsintering of silicon nanoparticle films

In: Applied Surface Science, Vol. 278, 2013, pp. 278 – 283

DOI
Schröter, Anja; Mathieu, Mareike; Franzka, Steffen; Feydt, Jürgen; Irsen, Stephan; Hartmann, Nils

Fabrication of chemical templates via selective laser-induced desorption of hexadecanethiol self-assembled monolayers

In: Applied Surface Science, Vol. 278, Laser materials processing for micro and nano applications, E-MRS 2012 Symposium V, 2013, pp. 57 – 61

DOI
Aumann, A.; Maragkaki, S.; Schulz, F.; Schröter, A.; Schöps, B.; Franzka, Steffen; Hartmann, Nils; Ostendorf, A.

Sub-wavelength patterning of self-assembled organic monolayers via non-collinear optical parametric amplifier

In: ICALEO 2013 - 32nd International Congress on Applications of Lasers and Electro-Optics / 32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013, Miami, FL, United States, 6 October 2013 through 10 October 2013, 2013, pp. 893 – 897
Schröter, Anja; Franzka, Steffen; Koch, Jürgen; Chichkov, Boris N.; Ostendorf, Andreas; Hartmann, Nils

Femtosecond-laser processing of nitrobiphenylthiol self-assembled monolayers

In: Applied Surface Science, Vol. 278: Laser materials processing for micro and nano applications, E-MRS 2012 Symposium V, 2013, pp. 43 – 46

DOI
Schade, Lina; Franzka, Steffen; Hardt, Sebastian; Wiggers, Hartmut; Hartmann, Nils

Sintering of thin titanium dioxide nanoparticle films via photothermal processing with ultraviolet continuous-wave lasers

In: Applied Surface Science, Vol. 278, Laser materials processing for micro and nano applications, E-MRS 2012 Symposium V, 2013, pp. 336 – 340

DOI
Amiri, Crispin; Thomas, Marc; Franzka, Steffen; Frost, Sven; Ulbricht, Mathias; Hartmann, Nils

Hofmeister Effect of Sodium Halides on the Switching Energetics of Thermoresponsive Polymer Brushes

In: Macromolecular Rapid Communications, Vol. 34, 2013, Nr. 5, pp. 417 – 422

DOI

2012

Behrenberg, Dennis; Franzka, Steffen; Petermann, Nils; Wiggers, Hartmut; Hartmann, Nils

Photothermal laser processing of thin silicon nanoparticle films : On the impact of oxide formation on film morphology

In: Applied Physics A: Materials Science and Processing, Vol. 106, 2012, Nr. 4, pp. 853 – 861

DOI

2011

Amiri, Crispin; Franzka, Steffen; Frost, Sven; Ulbricht, Mathias; Hartmann, Nils

Probing the intrinsic switching kinetics of ultrathin thermoresponsive polymer brushes

In: Angewandte Chemie International Edition, Vol. 50, 2011, Nr. 19, pp. 4513 – 4516

DOI

2010

Klingebiel, Benjamin; Scheres, Luc; Franzka, Steffen; Zuilhof, Han; Hartmann, Nils

Photothermal micro- and nanopatterning of organic/silicon interfaces

In: Langmuir, Vol. 26, 2010, Nr. 9, pp. 6826 – 6831

DOI
Mathieu, Mareike; Franzka, Steffen; Koch, Jürgen; Chichkov, Boris N.; Hartmann, Nils

Self-assembled organic monolayers as high-resolution resists in rapid nonlinear processing with single femtosecond laser pulses

In: Applied Physics A: Materials Science and Processing, Vol. 101, 2010, Nr. 3, pp. 461 – 466

DOI
Mathieu, Mareike; Schunk, Daniel; Franzka, Steffen; Mayer, Christian; Hartmann, Nils

Temporal stability of photothermally fabricated micropatterns in supported phospholipid multilayers

In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, Vol. 28, 2010, Nr. 4, pp. 953 – 957

DOI
Klingebiel, Benjamin; Schröter, Anja; Franzka, Steffen; Hartmann, Nils

Photothermally induced bromination and decomposition of alkylsiloxane monolayers on surface-oxidized silicon substrates

In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, Vol. 28, 2010, Nr. 4, pp. 834 – 837

DOI
Franzka, Steffen; Koch, Jürgen; Chichkov, Boris N.; Hartmann, Nils

Nonlinear femtosecond laser processing of alkylsiloxane monolayers on surface-oxidized silicon substrates

In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, Vol. 28, 2010, Nr. 4, pp. 814 – 817

DOI

2009

Hartmann, Nils; Klingebiel, Benjamin; Balgar, Thorsten; Franzka, Steffen; Hasselbrink, Eckart

Laser-induced local dehydroxylation on surface-oxidized silicon substrates: mechanistic aspects and prospects in nanofabrication

In: Applied Physics A: Materials Science and Processing, Vol. 94, 2009, Nr. 1, pp. 95 – 103

DOI
Mathieu, Mareike; Friebe, Alexander; Franzka, Steffen; Hartmann, Nils

Surface-initiated polymerization on laser-patterned templates : morphological scaling of nanoconfined polymer brushes

In: Langmuir, Vol. 25, 2009, Nr. 20, pp. 12393 – 12398

DOI
Klingebiel, Benjamin; Schröter, Anja; Franzka, Steffen; Hartmann, Nils

Photothermally induced microchemical functionalization of organic monolayers

In: ChemPhysChem, Vol. 10, 2009, Nr. 12, pp. 2000 – 2003

DOI
Stella, Kevin; Bürstel, Damian; Franzka, Steffen; Diesing, Detlef; Posth, Oliver

Preparation and properties of thin amorphous tantalum films formed by small e-beam evaporators

In: Journal of Physics D: Applied Physics, 2009, Nr. 42, pp. 135417
Mathieu, Mareike; Schunk, Daniel; Franzka, Steffen; Mayer, Christian; Hasselbrink, Eckart; Hartmann, Nils

Direct Laser Patterning of Soft Matter: Photothermal Processing of Supported Phospholipid Multilayers with Nanoscale Precision

In: Small, Vol. 5, 2009, Nr. 18, pp. 2099 – 2104

DOI

2008

Hartmann, Nils; Franzka, Steffen; Koch, J; Ostendorf, A; Chichkov, B. N.

Subwavelength patterning of alkylsiloxane monolayers via nonlinear processing with single femtosecond laser pulses

In: Applied Physics Letters (APL), Vol. 92, 2008, pp. 223111

DOI

2007

Hartmann, Nils; Dahlhaus, Daniel; Franzka, Steffen

Self-assembled organic templates for the selective adsorption of gold nanoparticles into confined domains
24th European Conference on Surface Science (ECOSS-24) ; 4-8 September 2006, Paris, France,

In: Surface Science, Vol. 601, 2007, Nr. 18, pp. 3916 – 3920

DOI
Susanto, Heru; Franzka, Steffen; Ulbricht, Mathias

Dextran fouling of polyethersulfone ultrafiltration membranes-Causes, extent and consequences.

In: Journal of Membrane Science, Vol. 296, 2007, Nr. 1+2, pp. 147 – 155
Wiemann, M.; Bingmann, Dieter; Franzka, Steffen; Hartmann, Nils; Urch, Henning; Epple, Matthias

Oriented growth of osteoblast-like cells on two-dimensionally structured films of functionalized calcium phosphate nanoparticles on a silicon substrate

In: Advanced Engineering Materials, Vol. 9, 2007, pp. 1077 – 1081

DOI

2006

Dahlhaus, Daniel; Franzka, Steffen; Hasselbrink, Eckart; Hartmann, Nils

1D Nanofabrication with a Micrometer-Sized Laser Spot

In: Nano Letters, Vol. 6, 2006, Nr. 10, pp. 2358 – 2361

DOI
Hartmann, Nils; Balgar, Thorsten; Bautista, Rafael; Franzka, Steffen

Direct laser patterning of octadecylsiloxane monolayers on surface-oxidized silicon substrates : Indications for a photothermal excitation mechanism

In: Surface Science, Vol. 600, 2006, Nr. 18, pp. 4034 – 4038

DOI
Balgar, Thorsten; Franzka, Steffen; Hasselbrink, Eckart; Hartmann, Nils

Laser-assisted fabrication of submicron-structured hydrophilic/ hydrophobic templates for the directed self-assembly of alkylsiloxane monolayers into confined domains

In: Applied Physics A: Materials Science and Processing, Vol. 82, 2006, Nr. 1, pp. 15 – 18

DOI
Urch, Henning; Franzka, Steffen; Dahlhaus, Daniel; Hartmann, Nils; Hasselbrink, Eckart; Epple, Matthias

Preparation of two-dimensionally patterned layers of functionalised calcium phosphatenanoparticles by laser direct writing

In: Journal of Materials Chemistry, Vol. 16, 2006, Nr. 19, pp. 1798 – 1802

DOI

2005

Schneider, Joerg J.; Engstler, Joerg; Budna, Karl P.; Teichert, Christian; Franzka, Steffen

Freestanding, Highly Flexible, Large Area, Nanoporous Alumina Membranes with Complete Through-Hole Pore Morphology

In: European Journal of Inorganic Chemistry, 2005, Nr. 12, pp. 2352 – 2359

DOI
Franzka, Steffen; Dahlhaus, Daniel; Hartmann, Nils

Preparation of stacked organosiloxane bilayers on hydrophilic and hydrophobic silicon substrates by spin coating

In: Thin Solid Films, Vol. 488, 2005, Nr. 1-2, pp. 124 – 131

DOI
Lazos, Dimitrios; Franzka, Steffen; Ulbricht, Mathias

Size-Selective Protein Adsorption to Polystyrene Surfaces by Self-Assembled Grafted Poly(ethylene Glycols) with Varied Chain Lengths

In: Langmuir, Vol. 21, 2005, Nr. 19, pp. 8774 – 8784

DOI

2004

Balgar, Thorsten; Franzka, Steffen; Hartmann, Nils; Hasselbrink, Eckart

Preparation of Submicron-Structured Alkylsiloxane Monolayers Using Prepatterned Silicon Substrates by Laser Direct Writing

In: Langmuir, Vol. 20, 2004, Nr. 9, pp. 3525 – 3527

DOI

2003

Kruse, Matthias; Franzka, Steffen; Schmid, Günter

Nanostructured silicon surfaces via nanoporous alumina

In: Chemical Communications: ChemComm, 2003, Nr. 12, pp. 1333 – 1335

DOI
Liu, Yunping; Meyer-Zaika, Wolfgang; Franzka, Steffen; Schmid, Günter; Tsoli, Maria; Kuhn, Hubert

Gold-Cluster Degradation by the Transition of B-DNA into A-DNA and the Formation of Nanowires

In: Angewandte Chemie International Edition, Vol. 42, 2003, Nr. 25, pp. 2853 – 2857

DOI
Hartmann, Nils; Balgar, Thorsten; Bautista, Rafael; Dahlhaus, Daniel; Franzka, Steffen; Hasselbrink, Eckart

Preparation of organic monolayers on uniform and patterned silicon substrates

In: Physical chemistry of interfaces and nanomaterials II: 6 - 8 August 2003, San Diego, California, USA II / Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, 06.-08.08.2003, San Diego, California, United States / Lian, Tianquan; Dai, Hai-Lung (Eds.). Bellingham [u.a.]: SPIE, 2003, pp. 9 – 23

DOI

2002

Emmrich, Eva; Franzka, Steffen; Schmid, Günter; Majoral, Jean-Pierre

Monolayers of a Fourth-Generation Thiol-Terminated Dendrimer

In: Nano Letters, Vol. 2, 2002, Nr. 11, pp. 1239 – 1242

DOI
Schulz, Frank; Franzka, Steffen; Schmid, Günter

Nanostructured Surfaces by Deposition of Metal Nanoparticles by Means of Spray Techniques

In: Advanced Functional Materials, Vol. 12, 2002, Nr. 8, pp. 532 – 536

DOI

2001

Sawitowski, Thomas; Franzka, Steffen; Beyer, Norbert; Levering, Matthias; Schmid, Günter

Nanostructured Surfaces

In: Advanced Functional Materials, Vol. 11, 2001, Nr. 3, pp. 169 – 173

DOI
Schneider, Jörg J.; Engstler, Jörg; Franzka, Steffen; Hofmann, Kathrin; Albert, Barbara; Ensling, Jürgen; Gütlich, Philipp; Hildebrandt, Peter; Döpner, Susanne; Pfleging, Wilhelm; Günther, Bernd; Müller, Günter

Carbon nanotube bags : catalytic formation, physical properties, two-dimensional alignment and geometric structuring of densely filled carbon tubes

In: Chemistry - A European Journal, Vol. 7, 2001, Nr. 13, pp. 2888 – 2895

DOI
Schneider, Jörg J.; Engstler, Jörg; Franzka, Steffen; Hofmann, Kathrin; Albert, Barbara; Ensling, Jürgen; Gütlich, Philipp; Hildebrandt, Peter; Dopner, Susanne; Pfleging, Wilhelm; Günther, Bernd; Müller, Günter

Carbon nanotube bags : catalytic formation, physical properties, two-dimensional alignment and geometric structuring of densely filled carbon tubes [Corrigendum]

In: Chemistry - A European Journal, Vol. 7, 2001, Nr. 20, pp. 4323

DOI

1996

Franzka, Steffen; Zum Gahr, K.h

Microtribological studies of unlubricated sliding Si/Si contact in air using AFM/FFM

In: Tribology Letters, Vol. 2, 1996, Nr. 3, pp. 207 – 220

DOI