self-organization, electrohydrodynamic, pattern, photoelectrochemical, mesostructure, reaction-diffusion, precipitation, bottom-up, Liesegang
R. Tóth R.M. WalliserN.S. MurrayD. K. BoraA BraunG. FortunatoC.E. HousecroftE.C. Constable (2016), A self-assembled, multicomponent water oxidation device, in Chemical Communications
, 52, 2940-2943.
Boudoire Florent, Toth Rita, Heier Jakob, Braun Artur, Constable Edwin C. (2014), Hematite nanostructuring using electrohydrodynamic lithography, in APPLIED SURFACE SCIENCE
, 305, 62-66.
Boudoire Florent, Toth Rita, Heier Jakob, Braun Artur, Constable Edwin C. (2014), Photonic light trapping in self-organized all-oxide microspheroids impacts photoelectrochemical water splitting, in ENERGY & ENVIRONMENTAL SCIENCE
, 7(8), 2680-2688.
Suzuno Kohta, Ueyama Daishin, Branicki Michal, Tóth Rita, Braun Artur, Lagzi István (2014), Maze solving using fatty acid chemistry, in Langmuir
, 30(31), 9251-9255.
Toth Rita, Heier Jakob, Tisserant Jean-Nicolas, Anna Enyedy Eva, Braun Artur, Graule Thomas (2012), Self-organised microdots formed by dewetting in a highly volatile liquid, in JOURNAL OF COLLOID AND INTERFACE SCIENCE
, 378, 201-209.
Bora Debajeet K., Hu Yelin, Thiess Sebastian, Erat Selma, Feng Xuefei, Mukherjee Sumanta, Fortunato Giuseppino, Gaillard Nicolas, Toth Rita, Gajda-Schrantz Krisztina, Drube Wolfgang, Graetzel Michael, Guo Jinghua, Zhu Junfa, Constable Edwin C., Sarma D. D., Wang Hongxin, Braun Artur (2013), Between photocatalysis and photosynthesis: Synchrotron spectroscopy methods on molecules and materials for solar hydrogen generation, in JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
, 190, 93-105.
R. Toth R.M. Walliser I. Lagzi D. Mathys L. Marot A. Braun C.E. Catherine E.C. Constable (2016), Understanding the formation of aligned, linear arrays of Ag nanoparticles, in RSC Advances
, 12(40), 8367--8374.
Tóth Rita, M. Walliser Roche, Lagzi István, Boudoire Florent, Düggelin Marcel, Braun Artur, E. Housecroft Catherine, C. Constable Edwin (2016), Probing the mystery of Liesegang band formation: revealing the origin of self-organized dual-frequency micro and nanoparticle arrays, in Soft Matter
, 12(40), 8367-8374.
Schrantz Krisztina, Wyss P. Pradeep, Ihssen Julian, Toth Rita, Bora K. Debajeet, Vitol A. Elina, Rozhkova A. Elena, Pieles Uwe, Thöny-Meyer Linda, Braun Artur (2017), Hematite photoanode co-functionalized with self-assemblingmelanin and C-phycocyanin for solar water splitting at neutral pH, in Catalysis Today
, 284, 44-51.
Suzuno Kohta, Ueyama Daishin, Branicki Michal, Toth Rita, Braun Artur, Lagzi Istvan (2017), Marangoni Flow Driven Maze Solving, in Adamatzky Andrew (ed.), Advances in Unconventional Computing
, Springer International Publishing, Swizerland, 237-243.
Wang Jian-Jun, Hu Yelin, Toth Rita, Fortunato Giuseppino, Braun Artur (2016), Facile Nonpolar Organic Solution - Process to Nanostructure Hematite Photoanode with High Efficiency and Stability for Water Splitting, in Journal of Materials Chemistry A
, 4(8), 2821-2825.
Lovass Petra, Branicki Michal, Toth Rita, Braun Artur, Suzuno Kohta, Ueyama Daishin, Lagzi Istvan (2015), Maze solving using temperature-induced Marangoni flow, in RSC Advances
, 5(60), 48563--48568.
Walliser M. Roche, Boudoire Florent, Orosz Eszter, Toth Rita, Braun Artur, Constable C. Edwin, Racz Zoltan, Lagzi Istvan (2015), Growth of Nanoparticles and Microparticles by Controlled Reaction-Diffusion Processes, in Langmuir
, 31(5), 1828-1834.
Artur Braun Rita Toth Istvan Lagzi (accepted), Künstliche Intelligenz aus dem Chemiereaktor, in Nachrichten aus der Chemie (Chemie und Computer), GdCH
The objective of this Marie Heim-Vögtlin (MHV) project is to investigate self-organisation processes for the design of structured and patterned materials with application to energy sector, for example photoelectrodes for solar water splitting. My MHV project is related to a joint project between Empa and University of Basel (SNF # 200021-137868 “Reaction-diffusion processes for the growth of patterned structures and architectures: A bottom-up approach for photoelectrochemical electrodes”), in which I’m critically involved (as a co-PI). The MHV project is an application for my salary during the aforementioned SNF project. My first two years would be funded from the MHV subsidy (50 % employment), and Empa pledges to continue my employment for the 3rd year at a 100% level.
The conventional methods to nanostructure materials are the so called 'top-down' techniques, where structures are produced by fabricating the material by removing parts of it, i.e. lithography methods. Recently considerable attention has been devoted to the so called ‘bottom-up’ techniques where the structure is spontaneously built from building blocks using self-organization/self-assembly techniques. Reaction-diffusion-precipitation processes (e.g. Liesegang pattern (LP), [Liesegang 1896]) are very promising candidates for building complex structures because the location of the self-organised chemical pattern is locked once it is formed. Another promising self-organization process is the formation of ordered nanopillar arrays in a very thin layer of molten polymer [Schäffer 2000-2002] driven by electrohydrodynamic (EHD) instability. The advantage of this technique is that it does not require a template with relief pattern because the pillars form spontaneously.
In order to be able to manipulate pattern formation in photovoltaic thin films we will combine new research on self-organizing systems with nanoscale materials science. We will synthesise, characterise and understand mixed metal self-organized planar meso- and/or microstructures, and single as well as mixed oxide core-shell nanopillar arrays. We will transfer the structures to ceramic systems. Results from structural and morphological studies will enable us to understand the mechanism of the formation of these structures. Photoelectrochemical characterisation will also be performed and a model will be developed.