Ziel
The project will help developing new technologies for the bottom-up fabrication of nanoscale electronic devices using principles learned from Nature. We will use a cross-disciplinary approach between biotechnology, materials science, and microelectronics that will result in a set of fabrication tools for the self-assembly of a variety of nanoscale electronic structures, devices, and circuits. These tools will include novel surface-modified semiconductor and metal nanoparticles as functional units, bacterial S-layer proteins as templates for superlattice arrays, and novel nanoscale interconnects. The primary results of the project will be basic technology for bottom-up fabrication and a better understanding of interactions between coupled self-assembled nanoparticle devices.
The project will help developing new technologies for the bottom-up fabrication of nanoscale electronic devices using principles learned from Nature. We will use a cross-disciplinary approach between biotechnology, materials science, and microelectronics that will result in a set of fabrication tools for the self-assembly of a variety of nanoscale electronic structures, devices, and circuits. These tools will include novel surface-modified semiconductor and metal nanoparticles as functional units, bacterial S-layer proteins as templates for superlattice arrays, and novel nanoscale interconnects. The primary results of the project will be basic technology for bottom-up fabrication and a better understanding of interactions between coupled self-assembled nanoparticle devices.
OBJECTIVES
The primary objective of this project is to develop self-assembly technologies for the bottom-up fabrication of nanoscale electronic devices using assembly strategies learned from Nature.
During the project we shall:
develop new materials for the fabrication of nanoparticle-based functional units;
develop protocols for positioning the functional units;
develop templating protocols to enable directed self-assembly of the functional units into superlattice arrays at technologically relevant interfaces;
develop self-assembly technologies for interconnecting the functional units (nano-nano) and connecting them to micron scale electrodes (nano-micro interconnects);
demonstrate the fabrication techniques by self-assembly of single-particle and double-particle devices, and self-assembly of interconnections in a nanoparticle array;
investigate interaction rules between functional units in prototypical cellular automata circuits.
DESCRIPTION OF WORK
We propose to use a cross-disciplinary approach between biotechnology, materials science, and microelectronics that will result in a set of fabrication tools for the self-assembly of a variety of nanoscale electronic structures, devices, and circuits. These tools will include novel surface-modified semiconductor and metal nanoparticles (NPs) as functional units, bacterial S-layer proteins as templates for superlattice arrays, and novel concepts for nanoscale interconnects.
Besides the management, evaluation, and dissemination workpackages, the work plan is divided into 8 main workpackages, each being co-ordinated by one consortium participant.
WP2 focuses on NP synthesis, including novel core-shell semiconductor NPs and symmetrically substituted NPs.
WP3 involves biomolecule synthesis to provide the components needed for self-assembly of functional units and interconnects via molecular recognition.
WP4 is devoted to the self-assembly of nano-nano and nano-micro interconnects between NPs and metal microcontacts.
WP5 performs the directed self-assembly of single and coupled NPs.
WP6 provides NP arrays templated by native and genetically modified S-protein monolayers, with subsequent stabilisation in chemically inert matrices.
WP7 is responsible for the assembly of interconnects within the S-layer templated NP arrays.
WP8 is devoted to device integration and characterisation. Its task involves the design and fabrication of "smart" electrical test structures and the characterisation (electrical/structural/simulation) of NP-based devices, assisted by calculation of electronic and transport properties of inter-particle molecular recognition linkers.
During WP9 (Year 3), the developed technologies for self-assembly of demonstrator devices will be optimised with respect to potential room temperature device operation.
Novel surface modified nanoparticles necessary for the array assembly and for addressing individual nanoparticles were developed. Protocols for the ligand exchange with thiol-modified tri-alcoxysilanes and the programmable polycondensation of the ligand shell in the presence of charge- and solubility-determining ligands under concomitant covalent incorporation of functional coupling groups such as amines were developed. Coupling to 250 bp DNA was successfully demonstrated. Additionally, protocols for the synthesis of novel nanomaterials with promising properties for the utilisation in self-assembled nanoelectronic devices were developed. Examples are the magnetic CoPt3 particles and zinc oxide nanowires. For the latter a novel mechanism of crystal growth, namely the oriented attachment of quasi-spherical particles to nanorods, could be identified as one of the first examples for a crystal growth mechanism which allows a deeper insight in the formation of crystalline matter in general. The electric field alignment of the rods was successfully demonstrated. For the CoPt3 nanoparticles, variable temperature charge transport studies of nanoparticle array devices self-assembled between nanoscale electrodes yielded the first observation of Coulomb Blockade in this system.
An anneal process was used to tune the inter-nanocrystal separation and hence control the electronic properties of the array, resulting in an insulator-to-metal transition as a function of anneal temperature. The self-assembly strategy developed for addressing individual nanoparticles is based on hybridisation and metallisation of oligonucleotides and oligonucleotide/peptide composites. Synthetic oligonucleotides were used for the preparation of the molecular wires, offering the possibility to introduce modifications at any predetermined position. The proposed structure consists of three different elements. Two anchoring elements at each end, having disulfide groups enabling attachment of the wires to electrodes. The centre of the structure is a chimeric compound with a DNA part that will position the element in the middle of the structure and contains biotin as a recognition group, isolated from the DNA by a spacer molecule. This recognition element will be used to direct a nanoparticle into the middle of the structure. The size of the whole structure is determined by the extension elements between the recognition and the anchoring elements. Further it was for the first time demonstrated that the synthetic methodology employed, allows synthesis of more complex structures, such as branched oligonucleotide structures. Since DNA is insulating new metallization approaches were developed enabling to metallise the self-assembled interconnects.
Two methods for the metallisation of DNA were developed. One approach is based on the interaction between the capping ligand of negatively charged phosphine stabilised gold NPs and DNA, producing metallic DNA-templated nanowires (diameter ~ 130 nm) having resistivities ca one-hundredth the resistivity of bulk gold. For the metallisation of short oligonucletides (~240 bp), a metallization method based on electrostatic interactions between positively charged DMAP gold nanoparticle (6 nm) and the negatively charged DNA backbone was developed. The assembly technology for addressing individual nanoparticles from macroscopic electrodes involved not only, the development of assembly and purification protocols based on electrophoresis but also the structural characterisation based on TEM, SEM, AFM, and NSOM of the 240 bp assemblies. Combining the above approach with the selective metallization technique for the short pieces all methodologies for addressing individual nanoparticles from macroscopic electrodes were successfully developed. The nano-scale electrode structures have been successfully fabricated using electron-beam lithography with well-defined gaps ranging from 50 nm to several microns. Crystalline bacterial surface layer (S-layer) proteins were used as nanometric templates for the formation of addressable arrays of nanoparticles on silicon substrates. Array assembly was successfully demonstrated using citrate stabilzed gold NPs (5nm) and amino functionalised cadmium selenid NPs (4nm). Biotinylated ferritin molecules with 12 nm diameters were successfully bound on genetically engineered streptavidin S - layer fusion proteins. Spatial control over S-layer reassembly was obtained either by the soft lithographical method of micromoulding in capillaries, or by recrystallisation of S-layer protein on micrometer sized test structures.
Wissenschaftliches Gebiet (EuroSciVoc)
CORDIS klassifiziert Projekte mit EuroSciVoc, einer mehrsprachigen Taxonomie der Wissenschaftsbereiche, durch einen halbautomatischen Prozess, der auf Verfahren der Verarbeitung natürlicher Sprache beruht. Siehe: Das European Science Vocabulary.
CORDIS klassifiziert Projekte mit EuroSciVoc, einer mehrsprachigen Taxonomie der Wissenschaftsbereiche, durch einen halbautomatischen Prozess, der auf Verfahren der Verarbeitung natürlicher Sprache beruht. Siehe: Das European Science Vocabulary.
- Technik und Technologie Werkstofftechnik Kristalle
- Technik und Technologie Werkstofftechnik Verbundwerkstoffe
- Naturwissenschaften Biowissenschaften Genetik DNS
- Naturwissenschaften Naturwissenschaften Elektromagnetismus und Elektronik Mikroelektronik
- Technik und Technologie Nanotechnologie Nanomaterialien
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Schlüsselbegriffe des Projekts, wie vom Projektkoordinator angegeben. Nicht zu verwechseln mit der EuroSciVoc-Taxonomie (Wissenschaftliches Gebiet).
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Mehrjährige Finanzierungsprogramme, in denen die Prioritäten der EU für Forschung und Innovation festgelegt sind.
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Aufforderungen zur Einreichung von Vorschlägen sind nach Themen gegliedert. Ein Thema definiert einen bestimmten Bereich oder ein Gebiet, zu dem Vorschläge eingereicht werden können. Die Beschreibung eines Themas umfasst seinen spezifischen Umfang und die erwarteten Auswirkungen des finanzierten Projekts.
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Finanzierungsplan
Finanzierungsregelung (oder „Art der Maßnahme“) innerhalb eines Programms mit gemeinsamen Merkmalen. Sieht folgendes vor: den Umfang der finanzierten Maßnahmen, den Erstattungssatz, spezifische Bewertungskriterien für die Finanzierung und die Verwendung vereinfachter Kostenformen wie Pauschalbeträge.
Finanzierungsregelung (oder „Art der Maßnahme“) innerhalb eines Programms mit gemeinsamen Merkmalen. Sieht folgendes vor: den Umfang der finanzierten Maßnahmen, den Erstattungssatz, spezifische Bewertungskriterien für die Finanzierung und die Verwendung vereinfachter Kostenformen wie Pauschalbeträge.
Koordinator
10785 BERLIN
Deutschland
Die Gesamtkosten, die dieser Organisation durch die Beteiligung am Projekt entstanden sind, einschließlich der direkten und indirekten Kosten. Dieser Betrag ist Teil des Gesamtbudgets des Projekts.