International Workshop Series
International Workshop Series of IMDEA Nanociencia
IMDEA Nanociencia is delighted to announce the second workshop of the International Workshop Series, a set of workshops that will be held in IMDEA Nanociencia every 3-6 months. The workshop is conceived in the framework of the Severo Ochoa Centre of Excellence. Each series will be focused in a certain field related to Nanoscience & Nanotechnology and world leading experts will be invited over to give a seminar and participate in round tables.
The aim of the workshop is to provide an insight to the latest investigations, foster/strengthen research collaborations in this field, and to exchange knowledge in an active manner. The workshop also brings the opportunity both to experienced and early-stage researchers to listen to high-level advances in a specific topic. The scientific committee of each series will be comprised by IMDEA Nano researchers with interest and experience in the specific topic selected.
This second workshop of the series, entitled “Frontiers in Chemistry of Molecular Materials”, will take place on the 6-7th March 2018. The scientific committee in this second edition is formed by Profs. Johannes Gierschner, Nazario Martín, Emilio Pérez and Tomás Torres.
We are looking forward to your attendance. To inscribe, please use the form under the tab “Registration”. The registration is free of cost, but mandatory to all attendees.
This workshop is sponsored by:
- Prof. Emilio Pérez
- Prof. Johannes Gierschner
- Prof. Nazario Martín
- Prof. Tomás Torres
- Dr. María Jesús Villa
- Dr. Elena Alonso
- Antonio Facchetti. Prof. of Chemistry at Northwestern University.
- Paolo Samori. Prof. at the University of Strasbourg.
- Soo-Young Park. Prof. at the College of Engineering at the Seoul National University.
- Ali Coskun. Prof. of Chemistry at the University of Fribourg.
- Davide Bonifazi. Prof. of Organic Supramolecular Chemistry at Cardiff University.
- Atsuhiro Osuka. Prof. at Department of Chemistry, Kyoto University.
- Nikos Tagmatarchis. Prof. at the National Hellenic Research Foundation.
- Claudia Backes. Group leader at Heidelberg University.
- Johannes Gierschner. Senior research Prof. at IMDEA Nanociencia.
- Nazario Martín. Prof. of Organic Chemistry at University Complutense of Madrid and associate researcher at IMDEA Nanociencia.
- Emilio Pérez. Senior research Prof. at IMDEA Nanociencia.
- Tomás Torres. Prof. of Organic Chemistry at Autonoma University of Madrid and associate researcher at IMDEA Nanociencia.
Organic Semiconductors for charge, light, and energy applications. From transistors to sensors to batteries
Antonio Facchetti a,b
a) Flexterra Inc., 8025 Lamon Ave., Skokie, IL, 60077 (USA);
b) Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208 (USA) (2 lines space)
Here we will report several organic semiconducting materials for printed/flexible thin-film transistors (TFTs), circuits, photovoltaic cells (PVs), batteries, and surface enhanced Raman spectroscopy (SERS) as well as to rationalize their charge-transport/performance characteristics as a function of the device architecture and interface modifications. Particularly, approaches to understand how the degree of -conjugation in semiconducting polymers affect charge transport will be reported. Our work provides new insights into the molecular design of organic semiconductors and enables the realization of TFTs with mobilities >3-40 cm2/Vs, OPV cell with efficiencies >12%, batteries with specific capacities >395 mAh g-1, and organic SERS with unprecedented enhancements.
New avenues in the chemistry and applications of fullerenes and two-dimensional materials: Azafullerenes and layered transition metal dichalcogenides
Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation 48 Vassileos Constantinou Avenue, Athens 11635, Greece
Substitution of a carbon atom by nitrogen on the skeleton of the most abundant fullerene molecule leads to azafullerene dimer (C59N)2, due to difference in valence between carbon and nitrogen, possessing narrower band-gap and easier reduction compared to parent C60. Herein, I will present the main aspects of azafullerene chemistry and the realization of some C59N based donor-acceptor dyads with interesting photophysical properties. The recent rediscovering of azafullerenes is expected to establish them as useful component in energy conversion schemes.
On the other hand, since the discovery of the remarkable properties of graphene, other twodimensional 2D nanomaterials such as layered transition-metal dichalcogenides (LTMDs) have sparked increasing scientific interest. Functionalization of LTMDCs is imperative for fully harnessing their capabilities and broaden their application in a variety of fields. I will also present the functionalization of exfoliated semiconducting MoS2 by employing 1,2-dithiolanes
which possess high binding affinity for Mo atoms, particularly those located at the edges of exfoliated semiconducting MoS2 where S vacancy sites are naturally introduced during the chemical exfoliation from the bulk. Such a facile approach for the chemical functionalization of LTMDCs allows the incorporation of a plethora of suitably modified organic derivatives targeting diverse applications.
Designer Molecules for Light Emission and Charge Transport
Soo Young Park
Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
Over last years, we have developed several different classes of π-conjugated molecular scaffolds for controlled light emission and charge transport. In this presentation, I will speak about four specific molecular scaffolds in terms of the molecular design, supramolecular stacking, photophysical and transport properties. First part is about the floppy molecules comprising the cyanostilbene units which show the strong self-assembly, solid state luminescence enhancement (SLE), and also the outstanding performances in OFET and OSC devices. Second and third classes of molecules are novel heteroarene scaffolds incorporating the indoloindole (IDID) and naphthyridinedione (NTD) units, respectively. Application of these molecules to the high performance OFET semiconductor, HTM in perovskite solar cell, and OLED emitter will be demonstrated. Fourth class of molecules are 2-hydroxyphenylimidazole derivatives which show the excited state intramolecular proton transfer (ESIPT) behavior. Entirely new disciplines of ‘molecular pixel’ and color-specific fluorescence switching are demonstrated with these ESIPT molecules.
Stable Porphyrin Radicals
Department of Chemistry, Kyoto University
In recent years, we have demonstrated that various porphyrinoids such as subporphyrin, meso-aryl-substituted porphyrin and hexaphyrin can stabilize the corresponding meso-oxy radicals to the extent that radicals can be handled like usual closed-shell molecules under ambient conditions. High stabilities of these meso-oxy radicals are mainly owing to effective spin delocalization over their large conjugation systems. Similarly neutral meso-aminyl radicals are very stable species without stabilization by neighboring heteroatom. The radical-stabilizing ability of porphyrins has been extended to the synthesis of a trimethylenemethane-embedded diradical and an aminyl triradical. These neutral oligoradicals are remarkably stable despite the high-spin ground states owing to the strong ferromagnetic interaction.
Phthalocyanines: New Molecular Materials for Molecular Photovoltaics
Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain, and IMDEA-Nanociencia, c/Faraday 9, Campus de Cantoblanco, 28049 Madrid, Spain,
Phthalocyanines (Pcs) are among the few molecules that reveal an intense red and NIR absorption and therefore, constitute promising dyes in molecular photovoltaics. Most recently they have reached record efficiency values participating as hole transporting materials in Perovskite sensitized solar cells (PSSCs). On the other hand Subphthalocyanines (SubPcs), are intriguing compounds. Their 14 pi-electron aromatic core associated with their curved structures render them also appealing building blocks for the construction of multicomponent photo- or electroactive assemblies. Recently, SubPcs have been used as non-fullerene acceptors in bulk heterojunctions (BHJ) solar cells.
Towards Controlled Light Emission in Organic Solids
Madrid Institute for Advanced Studies, IMDEA Nanoscience, Madrid, Spain
The last years have seen a boost in small molecule based conjugated materials for innovative (opto)electronic applications. Targeted design of such materials requires nevertheless a systematic understanding of structure-property relationships; this however can only be achieved if all intra- and intermolecular parameters can be controlled. We are therefore systematically investigating luminescent single crystals by integrating optical spectroscopy and quantum chemistry to unveil features and fates of molecular excitons. Our studies give detailed insight in the conditions for effective & color-tuned spontaneous and stimulated light emission, stressing the cooperative effect of molecular properties, intermolecular arrangement and morphology.
The power of light: from fast photodetectors to photoswitchable transistors based flexible multilevel memories
ISIS, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
One among the greatest challenges in organic electronics is the fabrication of multifunctional devices, i.e. that can respond to multiple and independent stimuli. Such a challenge can be accomplished by developing multicomponent materials in which each component imparts a well-defined function to the ensemble. The controlled combination of such components and their integration in real devices can be achieved by mastering the supramolecular approach.
In my lecture will review our recent works on the combination of carbon-based nanomaterials, an in particular organic semiconductors, with photochromic molecules (diarylethenes or azobenzenes) in order to realize smart, high-performing and light-sensitive (opto)electronic devices as well as flexible non-volatile optical memory thin-film transistor device with over 256 distinct levels.
 For reviews see: (a) X. Zhang, L. Hou, P. Samorì, Nat. Commun. 2016, 7, 11118. (b) E. Orgiu, P. Samorì, Adv. Mater. 2014, 26, 1827-1845.
 For modulating charge injection at metal-organic interface with a chemisorbed photochromic SAM see: (a) N. Crivillers, E. Orgiu, F. Reinders, M. Mayor, P. Samorì, Adv. Mater. 2011, 23, 1447-1452. (b) T. Mosciatti, M.G. del Rosso, M. Herder, J. Frisch, N. Koch, S. Hecht, E. Orgiu, P. Samorì, Adv. Mater. 2016, 28, 6606.
 For hybrid structure combining organic semiconductors blended with Au nanoparticles coated with a photochromic SAM see: C. Raimondo, N. Crivillers, F. Reinders, F. Sander, M. Mayor, P. Samorì, Proc. Natl. Acad. Sci. U.S.A. 2012, 109, 12375-12380.
 For blends energy level phototuning in a photochromic - organic semiconductor blend see: (a) E. Orgiu, N. Crivillers, M. Herder, L. Grubert, M. Pätzel, J. Frisch, E. Pavlica, G. Bratina, N. Koch, S. Hecht, and P. Samorì, Nat. Chem. 2012, 4, 675-679. (b) M. El Gemayel, K. Börjesson, M. Herder, D.T. Duong, J.A. Hutchison, C. Ruzié, G. Schweicher, A. Salleo, Y. Geerts, S. Hecht, E. Orgiu, P. Samorì, Nat. Commun. 2015, 6, 6330.
 For the fabrication of memory devices: T. Leydecker, M. Herder, E. Pavlica, G. Bratina, S. Hecht, E. Orgiu, P. Samorì, Nat. Nanotech. 2016, 11, 769–775.
 For the novel nanomesh scaffold based photodetector: L. Zhang, X. Zhong, E. Pavlica, S. Li, A. Klekachev, G. Bratina, T.W. Ebbesen, E. Orgiu, P. Samorì, Nat. Nanotech. 2016, 11, 900–906.
Tailoring Supramolecular Polymers for High Capacity Electrodes in Lithium-ion Batteries
Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
High capacity anode (Silicon, Si) and cathode (Sulfur) electrode materials are receiving a significant amount attention from the battery community due to their exceptionally large capacities. A consequence of the large Li capacity, however, is that the Si anode undergoes significant volume expansion, indeed up to 300%, resulting in severe mechanical and interfacial failures of the electrodes. We have recently demonstrated that by incorporating small amount of slide ring polyrotaxanes into the conventional binders such as PAA, it is possible to form binder networks with unparalleled elasticity, which enabled stable cycle life for silicon microparticle anodes at commercial-level areal capacities.
Programming pi-conjugated molecular materials through heteroatom doping
School of Chemistry. Cardiff University
In this lecture we will discuss about the main programming strategies tailoring the optoelectronic and self-assembly properties of pi-conjugated molecules materials. In particular, we will focus on the heteroatom-doping route as the emerging strategy to modify the chemical and physical properties of functional all-carbon pi-molecules. After a brief overview of the field, we will focus on the main synthetic strategies targeting the core or peripheral insertion of one or more heteroatoms (B, N, O) into a sp2-C framework and on the main principles governing the structure-relation properties for programming both optoelectronic and self-assembly properties. Case studies from our laboratory will be used throughout the lecture to describe the relevant principles.
Liquid exfoliation as versatile technique to study fundamental properties of 2D materials
Applied Physical Chemistry, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
Liquid exfoliation has become an important production technique to give access to a range of two-dimensional nanosheets in colloidal dispersion. In this talk, recent advancements in the liquid exfoliation and optical characterisation will be summarised with an emphasis on unifying principles. Materials under study include various TMDs, GaS, h-BN, black phosphorus, RuCl3 and more exotic candidates such as LaSeTe2 and NiPS3. All materials can be exfoliated and size-selected in a similar way yielding nanosheet dispersions with well-defined changes in their lateral dimensions and thickness. The optical extinction and absorbance spectra show systematic changes across all material classes giving access to studying the fundamental physics behind these changes. In addition, such dispersions are ideal to track potential degradation due to reaction with water and oxygen by time dependent optical measurements. This lays the foundation to investigate ways to chemically passivate defect sites.
Registration is OPEN
and you will receive a confirmation email.
The workshop will take place at IMDEA Nanociencia (Faraday 9, Cantoblanco, 28049, Madrid).
How to arrive
From Madrid (city center) [less than 40min]
From the major train stations (Atocha, Nuevos Ministerios or Chamartín):
- Take the train line C4 (towards Alcobendas-San Sebastián de los Reyes or Colmenar Viejo).
- Get off at 'Cantoblanco Universidad' station
- Walk about 15-20 minutes to IMDEA Nanoscience
From the major bus station (Plaza de Castilla):
- Take the bus 714 in Plaza de Castilla.
- Get off at the bus stop 'Parque Científico'. You may ask the driver to tell you which one is your stop.
From Madrid airport (Barajas) [about 1h30min]
If you arrived to Terminal 4
- Take the train line C1 (towards Príncipe Pio).
- Get off at 'Chamartín' station. It is about 10-15 minutes ride.
- Then change to a train of line C4 (towards Alcobendas-San Sebastián de los Reyes or Colmenar Viejo).
- Get off at 'Cantoblanco Universidad' station
- Walk about 15-20 minutes to IMDEA Nanoscience
If you arrived to Terminals 1,2 or 3
- Take the Metro line 8 (towards Nuevos Ministerios).
- Get off at 'Nuevos Ministerios' station. It is about 15 minutes ride.
- Then follow the 'Cercanías Renfe' signs to take a train line.
- Take a train of line C4 (towards Alcobendas-San Sebastián de los Reyes or Colmenar Viejo).
- Get off at 'Cantoblanco Universidad' station. It is about 15-20 minutes ride.
- Walk about 15-20 minutes to IMDEA Nanoscience
By taxi from Airport
- It should cost about 35€, depending on the trafic. (It should take about 35 minutes)
- Note that to the city center there is a flat fare of 30€. No supplements should be applied to this price.