A5026769423- Molecular Junctions and Nanostructures
- Graphene research and applications
- Organic Electronics and Photovoltaics
- Fullerene Chemistry and Applications
- Semiconductor materials and devices
- Carbon Nanotubes in Composites
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Crystallization and Solubility Studies
- Recycling and Waste Management Techniques
- Nanowire Synthesis and Applications
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- 2D Materials and Applications
- Synthesis and Properties of Aromatic Compounds
- Supercapacitor Materials and Fabrication
- Semiconductor materials and interfaces
- Advanced Battery Materials and Technologies
- Thin-Film Transistor Technologies
- Advancements in Battery Materials
- Synthesis and properties of polymers
- Advancements in Semiconductor Devices and Circuit Design
- Graphene and Nanomaterials Applications
- Advanced Memory and Neural Computing
- Epoxy Resin Curing Processes
Fraunhofer Institute for Systems and Innovation Research
2021-2024
École Polytechnique Fédérale de Lausanne
2017-2021
Friedrich-Alexander-Universität Erlangen-Nürnberg
2012-2017
Bavarian Polymer Institute
2011-2017
Instituto de Ciencia de Materiales de Sevilla
2017
Institute of Macromolecular Chemistry
2017
Abstract Solid‐state batteries are considered as a reasonable further development of lithium‐ion with liquid electrolytes. While expectations high, there still open questions concerning the choice materials, and resulting concepts for components full cells. On basis an analysis all materials concept options, roadmap solid‐state is presented, relying on both literature survey experts' opinions. Diverse cell different solid electrolytes may be developed up to commercial level, yet major...
We report a computational study on the chemical bonding of phosphonates and carboxylates to aluminum oxide surfaces how binding properties are related amount water in experimental environment. Two different surface structures were used calculations order model representative adsorption sites for account amorphous nature hydroxylated AlOx films experiment. For phosphonates, we find that thermodynamically preferred mode changes between mono-, bi-, tridentate depending structure residual water....
Abstract Micelles formed by the self-assembly of block copolymers in selective solvents have attracted widespread attention and uses a wide variety fields, whereas applications based on their electronic properties are virtually unexplored. Herein we describe studies solution-processable, low-dispersity, electroactive fibre-like micelles controlled length from π-conjugated diblock containing crystalline regioregular poly(3-hexylthiophene) core solubilizing, amorphous regiosymmetric or...
Abstract Graphene and related materials (GRMs) promise ample application potential throughout numerous industries. A dedicated graphene market gradually forms around emerging suppliers aspiring to satisfy future demands. Its growth critically depends on the interplay of supply stream maturation initial utilizations drive demand. The present issue Roadmap Briefs provides quantitative insights into current state development market. We aggregate underlying expectations projections from...
Self-assembled monolayer field-effect transistors (SAMFETs) of BTBT functionalized phosphonic acids are fabricated. The molecular design enables device operation with charge carrier mobilities up to 10−2 cm2 V−1 s−1 and for the first time SAMFETs which operate on rough, flexible PEN substrates even under mechanical substrate bending. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized online...
Self-assembled monolayers (SAMs) have been established as crucial interlayers and electronically active layers in organic electronic devices, such light emitting diodes (OLEDs), photovoltaics (OPVs), thin film transistors (OTFTs), nonvolatile memories (NVMs). The use of self-assembling functionalized molecules is beneficial due to mainly three advantages compared with common deposition approaches. (1) Molecular self-assembly occurs surface selectivity, determined by the interaction between...
A three-pronged approach has been used to design rational improvements in self-assembled monolayer field-effect transistors: classical molecular dynamics (MD) simulations investigate atomistic structure, large-scale quantum mechanical (QM) calculations for electronic properties, and device fabrication characterization as the ultimate goal. The MD reveal effect of using two-component monolayers achieve intact dielectric insulating layers a well-defined semiconductor channel. QM identify...
Abstract The remarkable properties of graphene and related materials (GRMs) promise substantial benefits for a wide range technologies. Their industrial utilization, however, critically depends on the availability suitable GRM supply in terms both quality quantity at competitive price. All factors remain highly specific to each application scenario, while emerging industry still struggles engage prospective clients active development GRM-enhanced products. present issue Graphene Roadmap...
Three different ultrathin hybrid dielectrics based on self-assembled monolayers (SAMs) from phosphonic acid molecules were investigated aluminum oxide. The impact of the underlying SAMs semiconductor morphology and transistor device performance was studied by reducing film thickness subsequently deposited α,ω-dihexylquaterthiophene to one monolayer less. nature SAM relates molecular orientation submonolayer films, which is photoluminescence microscopy atomic force microscopy. with high...
In this work, we compared the kinetics of monolayer self-assembly long-chained carboxylic acids and phosphonic on thin aluminum oxide surfaces investigated their dielectric properties in capacitors low-voltage organic thin-film transistors. Phosphonic acid anchor groups tend to substitute molecules thus allow formation mixed or fully exchanged monolayers. With different alkyl chain substituents (n-alkyl fluorinated chains), exchange reaction can be monitored as a function time by static...
Self-assembled monolayer field-effect transistors (SAMFETs) are not only a promising type of organic electronic device but also allow detailed analyses structure–property correlations. The influence the morphology on charge transport is particularly pronounced, due to confined 2D-π-stacked semiconductor molecules. morphology, in turn, governed by relatively weak van-der-Waals interactions and thus prone dynamic structural fluctuations. Accordingly, combining physical characterization...
The control of order in organic semiconductor systems is crucial to achieve desired properties electronic devices. We have studied the fullerene functionalized self-assembled monolayers by mixing active molecules with supporting alkyl phosphonic acids different chain length. By adjusting length molecules, structural modifications alignment C60 head groups within SAM can be tuned a controlled way. These changes on sub-nanometre scale were analysed grazing incidence X-ray diffraction and...
Photocharge generation and formation of long-lived charge carriers are relevant in photosynthesis, photocatalysis, photovoltaics, organic electronics. A better understanding the factors that determine these processes synthetic polymer semiconductors is crucial, but difficult due to their morphological inhomogeneity. Here, we report exceptionally photocharges one-dimensional semiconductor nanostructures. These nanostructures consist chiral oligopeptide-substituted thienothiophene-based...
We outline an unprejudiced molecular dynamics simulation approach to study the mechanisms of self-organization encompassing evolution surfactant–surface interactions growth self-assembled monolayers (SAMs).
Approaches for the selective self-assembly of functionalized carbon allotropes from solution are developed and validated 0D-fullerenes, 1D-carbon nanotubes 2D-graphene. By choosing right molecular interaction self-assembled monolayers (serving surface) with functionalization features materials, which provide solubility but also serve driving force assembly, we demonstrate a region-selective self-terminating assembly materials. Active layers can be selectively deposited in channel region...
Extended π-conjugated segments such as benzofurobenzofuran can be included into polyamides with high glass transition temperatures.
Mixed self-assembled monolayers of C60-functionalized and different long-chained insulating phosphonic acids provide molecular scale non-volatile memory dielectrics for low-voltage organic thin-film transistors. The retention depends on the insulation C60 moiety can be improved by embedding into SAM matrix covering corresponding molecules.
Semiconducting self-assembled monolayers (SAMs) represent highly relevant components for the fabrication of organic thin-film electronics because they enable precise formation active π-conjugates in terms orientation and layer thickness. In this work, we demonstrate monolayer field-effect transistors (SAMFETs) composed phosphonic acid oligomers 3-hexylthiophene (oligothiophenes—OT) with systematic variations thiophene repeating units (5, 10, 20). The devices exhibit stable lateral charge...
The possibility of fabricating self-assembled monolayers (SAMs) from alkylphosphonic acids functionalized with trifluoromethyl derivatives C60 on a metal oxide surface has been demonstrated in this work. Using several trifluoromethylfullerenes (TMFs) different compositions and isomeric structures, we explored their relative reactivities the Bingel-Hirsch cycloaddition reactions 11-(diethoxyphosphoryl)undecyl methyl malonate for first time. Only two isomers C60(CF3)10 showed fairly selective...