Crucial targets of nanoscience are new materials and devices. They can be based on known physical phenomena improving them, or they can apply completely new principles. New materials, physical phenomena, new principles - in this triangle we move with our research projects. Our fields of interest are photonic crystals, especially artificial opals, hierarchical materials, self-assembly and self-organization, directed self-assembly, alternative principles for solar cells, and Grätzel cells.

Lecture summer semester, University Duisburg-Essen
Recent Problems in Nanostructure Physics: Molecular Materials
See German Webpage
_____________________________________________________
Lecture winter semester, University Duisburg-Essen
Recent Problems in Nanostructure Physics: Photonic Crystals
Do butterflies, opals, and metallic-colored cars have something in common? The answer is: yes, the colors are produced by nanostructures. This lecture on nanostructured systems explains the theory and synthesis concepts of photonic crystals which are ordered dielectric nanostructures with lattice constants comparable with the wavelength of light. The lecture is usually given in winter semesters.
Dr. F. Marlow, Dr. D. Schunk: Monodisperse titania microshperes via controlled nanoparticle aggregation. Newsletter NanoEnergie 7, 2012, page 12
www.uni-due.de/imperia/md/content/nanoenergie_07_2012_web.pdf
T.-S. Deng and F. Marlow: Synthesis of Monodisperse Polystyrene@Vinyl-SiO2 Core@Shell Particles and Hollow SiO2 Spheres. Chem. Mater. 24 (2012) 536-546.
D. Schunk, S. Hardt, H. Wiggers, F. Marlow: Preparation of monodisperse titania microspheres via controllable nanoparticle aggregation. PCCP (2012). DOI: 10.1039/c2cp40658f.
Muldarisnur and F. Marlow: Opal Films: Crystal Orientation and Defects. J. Phys. Chem. C 115 (2011) 414–418
F. Marlow, M. Muldarisnur, P. Sharifi, H. Zabel: Interpretation of Small Angle Diffraction Experiments on Opal-like Photonic Crystals. Phys. Rev. B
84 (2011) 073401. DOI: 10.1103/PhysRevB.84.073401
T. R. Khan, A. Erbe, M. Auinger, F. Marlow, M. Rohwerder:
Electrodeposition of Zinc Silica Composite Coatings: Challenges in Incorporation of Functionalized Silica Particles within the Zinc Metal Matrix, Sci. Technol. Adv. Mater. 12 (2011), no. 055005, 1-9,
http://edoc.mpg.de/572368
C. R. Mendonca, D. S. Correa, F. Marlow, T. Voss, P. Tayalia, E. Mazur:
Three-dimensional fabrication of optically active microstructures containing an electroluminescent polymer.
Applied Physics Letters 95 (2009) 113309. DOI:10.1063/1.3232207
Frank Marlow, Muldarisnur, Parvin Sharifi, Rainer Brinkmann, and Cecilia Mendive:
Opals: Status and Prospects (Invited Review)
Angew. Chem. Int. Ed. 2009, 48, 6212 – 6233 » details, Angew. Chem. 2009, 121, 6328 – 6351
Ahmed S.G. Khalil, Frank Marlow:
Controlled Growth of SBA-3-like Hierarchical Assemblies on Different Homogeneous and Patterned Surfaces.
Mater. Res. Soc. Symp. Proc. Vol. 1114, 2009.
I. Popa, F. Marlow:
Post-deposition opal evolution.
ChemPhysChem 9 (2008) 1541-1547.
D. Konjhodzic, S. Schröter, F. Marlow,
Ultra-low refractive index mesoporous substrates for waveguide structures. In: Nanophotonic Materials (Eds.: R.B. Wehrsporn, H. Kitzerow, K. Busch) Wiley-VCH 2008 (Reprint von Nr. 90).
M. Tiemann, F. Marlow, J. Hartikainen, Ö. Weiss, M. Lindén:
Ripening Effectsf in ZnS Nanoparticles.
J. Phys. Chem. C, Vol. 112, No. 5 (2008) 1463
J. H. Wülbern, M. Eich, U. Hübner, R. Boucher, F. Marlow, W. Volksen:
Omni-directional photonic band gap in polymer photonic crystal slabs.
Appl. Phys. Lett.91, 22, 221104, (2007)
T. Voss, G. T. Svacha, E. Mazur, S. Müller, C. Ronning, D. Konjhodzic, F. Marlow:
High Order Waveguide Modes in ZnO Nanowires.
Nano Letters 7 No. 12 (2007) 3675 DOI: 10.1021/nl071958w
F. Schüth, F. Marlow.
Colloidal crystals find new order. (News and Views)
Nature Vol 449 (2007) 550, DOI:10.1038/449550a
F. Marlow, A. S. G. Khalil, M. Stempniewicz:
Circular mesostructures: Solids with novel symmetry properties.
Invited Feature. J. Mater. Chem. 17 (2007) 2168-2182 DOI:10.1039/B700532F.
M. Stempniewicz, M. Rohwerder, F. Marlow:
Release from SBA-3-like Fibers: Cross-wall Transport and External Diffusion Barrier. ChemPhysChem 8 (2007) 188.
D. Konjhodzic, S. Schröter, F. Marlow,
Ultra-low refractive index mesoporous substrates for waveguide structures.
phys. stat. sol. (a) 204 (2007) 3676-3688. DOI: 10.1002/pssa.200776405.
Magdalena Stempniewicz, Ahmed S. G. Khalil, Michael Rohwerder, and Frank Marlow:
Diffusion in Coiled Pores - Learning from Microrelease and Microsurgery.
J. Am. Chem. Soc.129 (2007) 10561. DOI: 10.1021/ja0728167.
M. Stempniewicz, M. Rohwerder, F. Marlow:
Release of Guest Molecules from Modified Mesoporous Silica.
Stud. Surf. Sci. Catal. 165 (2007) 825-828.
Tuesday, 14:00 - 15:00 Uhr , weekly , Seminar room Altbau
Schedule:
W:/Workgroup Marlow/Seminar AGMarlow/
Lecture summer semester, University Duisburg-Essen
Recent Problems in Nanostructure Physics: Molecular Materials
See German Webpage
_____________________________________________________
Lecture winter semester, University Duisburg-Essen
Recent Problems in Nanostructure Physics: Photonic Crystals
Do butterflies, opals, and metallic-colored cars have something in common? The answer is: yes, the colors are produced by nanostructures. This lecture on nanostructured systems explains the theory and synthesis concepts of photonic crystals which are ordered dielectric nanostructures with lattice constants comparable with the wavelength of light. The lecture is usually given in winter semesters.
A prerequisite for an efficient „molding the flow of light“ by photonic crystals is the molding of materials in desired nanostructures. Very often, conventional materials and processing techniques cannot fulfill the theoretical requirements for the materials and structures. Sol-gel methods enable material processing in opal pores and the controlled introduction of pores into materials. The porosity can be used for lowering the refractive index, for soft processing of the materials and for stress relaxation. Examples for this approach are ultra-low refractive index films used as supports for 2D photonic crystals, inverse opals with a skeleton-like unit cell filling and ferroelectric films with high transparency. Especially we are able to fabricate mesoporous silica films with a refractive index of 1.14 for use in 2D photonic crystal waveguide systems. Important achievements are described in the following papers:
Magdalena Stempniewicz, Ahmed S. G. Khalil, Michael Rohwerder, and Frank Marlow: Diffusion in Coiled Pores - Learning from Microrelease and Microsurgery. J. Am. Chem. Soc.129 (2007) 10561.
F. Marlow, A. S. G. Khalil, M. Stempniewicz: Circular mesostructures: Solids with novel symmetry properties. Invited Feature. J. Mater. Chem. 17 (2007) 2168-2182
A. S. G. Khalil, D. Konjhodzic, F. Marlow: Hierarchy Selection, Position Control, and Orientation by Patterned Surfaces. Adv. Mater. Vol 18, (2006) 1055.
Mesoporous structures are more than just materials with pores (2 nm < dmeso < 50 nm) bigger than micropores (dmicro < 2 nm). They show new structures, shapes and symmetries that induce new properties and reveal unexpected applications. A central point of our research is one especially-perfect class of mesoporous structures (circulites), exhibiting circularly arranged pores which represent a novel symmetry behavior. These structures are strictly-defined hierarchies which can serve as a prototype for the description and formation of hierarchical structures. Here, coiling is regarded as a general approach to the assembly of hierarchies. The control and design of hierarchical structures are the ultimate aims and have been achieved for this hierarchy type. Surfaces can be used for the selection of the hierarchy type, position control and alignment of the resulting particles. A molecular structuring of the support leads to pixel-like, highly-defined growth of a hierarchical arrangement containing 4 hierarchy levels. The properties of the hierarchies can be very specific, as the diffusion behavior. Important achievements are described in the following papers:
M. Schmidt, G. Boettger, M. Eich, W. Morgenroth, U. Huebner, H. G. Meyer, D. Konjhodzic, H. Bretinger, F. Marlow: Ultra low refractive index substrates – a novel base for photonic crystal slab waveguides. Appl. Phys. Lett. 85 (2004) 16-18. Web-Reprint: Virtual Journal of Nanoscale Science & Technology, 10 (2004) Issue 2
D. Konjhodzic, H. Bretinger, U. Wilczok, A. Dreier, A. Ladenburger, M. Schmidt, M. Eich, F. Marlow: Low-n Mesoporous Silica Films: Structure and Properties. Applied Physics A 81 (2005) 425.
F. Marlow, M.D. McGehee, D. Zhao, B.F. Chmelka, G.D. Stucky: Doped mesoporous silica fibers: A new laser material. Adv. Mater. 11 (1999) 632.
J. Loerke, F. Marlow: Laser Emission from Dye-Doped Mesoporous Silica Fibers. Adv. Mater. 14 (2002) No. 23
Brinkmann, Rainer
+49(0)208/306-2248
r.brinkmann((atsign))kofo.mpg.de
Dr. Deng, Tian Song
+49(0)208/306-2240
tdeng((atsign))kofo.mpg.de
Mrs. Hullermann, Abigail
+49-(0)208-3062240
hullermann((atsign))kofo.mpg.de
Priv. Doz. Dr. Marlow, Frank
+49(0)208/306-2255
marlow((atsign))kofo.mpg.de
Muldarisnur, Mulda
+49(0)208/306-2256
mulda((atsign))kofo.mpg.de
Samsonova, Elena
+49(0)208/306-2256
elsams((atsign))kofo.mpg.de
Mrs. Messmer, Lisanne
+49(0)208/306 2240
lisschal((atsign))kofo.mpg.de
Dr. Schunk, Daniel
+49(0)208/306-2248
schunk((atsign))kofo.mpg.de
Sharifi, Parvin
+49(0)208/306-2240
sharifi((atsign))kofo.mpg.de
Dr. Wall, Simone
+49(0)208/306 2240
wall((atsign))kofo.mpg.de
DFG Schwerpunkt 1113 "Photonische Kristalle"
Chemie.de
IMPRS-Surmat
DPG
Bunsengesellschaft
Other Authors on Our Works
"Coiled Stones" Max Planck Society, Press Release, June 13, 2006
"Hariboschnecken im Reagenzglas" Max-Planck-Gesellschaft, Presseinformation, May 8, 2006
"Gas Diffusion and Microstructral Properties of Ordered Mesoporous Silica Fibres-" Y.S. Lin and H. Alsyouri, J. Phys. Chem. B 2006, 110, 11606
"Chemists direct silicon oxide into a selected hierarchical structure" www.physorg.com, June 14, 2006
"Schnecken im Reagenzglas" in www.chemie.de, May 2006
"Циркулярные мезоструктуры: твердые вещества с новыми свойствами симметрии" in www.nanometer.ru, April 19, 2007
"Schnecken im Reagenzglas" in www.chemie.de, May 2006