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University of Groningen

University of Groningen

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633 Projects, page 1 of 127
  • Funder: European Commission Project Code: 224818
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  • Funder: European Commission Project Code: 898657
    Overall Budget: 170,419 EURFunder Contribution: 170,419 EUR

    With feature sizes of integrated circuits rapidly approaching molecular length scales, historical motivations to pursue the use of individual molecules in electronic circuits can no longer be justified based on their size alone. Instead, the focus has shifted towards the identification and exploitation of unusual transport phenomena unique to molecular materials (dominated by quantum mechanics) which can complement or supplant current silicon-based technologies. With the large majority of previous studies centered around the study of organic, redox-inactive molecules - typically transporting charge via single-step tunnelling processes - investigations of analogous systems that explicitly involve multi-step tunnelling, or ‘hopping’, behaviour are comparatively rare. In this project I propose to systematically study hopping processes in molecular-scale electronics (HOPELEC), with two primary objectives: (i) to construct the first single-molecule current oscillator; and (ii) probe under-explored current rectification mechanisms for single-molecule diodes. This highly interdisciplinary research area will involve the synthesis of new multi-site redox-active metal complexes capable of binding between nanoscale electrodes. Transport through these systems will be studied both at the single-molecule level using the scanning tunnelling microscope-based break junction technique, and in large area measurements using the eutectic Ga−In method. This work will expose new molecular-scale device mechanisms at the intersection of Marcus and Landauer theories, and contribute to our understanding of related processes in biology and materials science. Project results will be actively promoted through Outreach workshops on electronics/computation (translated also to YouTube). The extensive training, enhanced international profile, networks, and new experiences provided by this Fellowship will function as a 'springboard' in propelling me from Ph.D. student to independent research scholar.

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  • Funder: European Commission Project Code: 803740
    Overall Budget: 1,670,320 EURFunder Contribution: 1,670,320 EUR

    The heaviest element which has been found in nature is uranium with 92 protons. So far, the elements up to atomic number 118 (oganesson) have been discovered in the laboratory. All transuranium elements are radioactive and their production rates decrease with increasing number of protons. An Island of Stability, where the nuclei have relatively long half-lives, is predicted at the neutron number 182 and, depending on the theoretical model, at the proton number 114, 120 or 126. Current experimental techniques do not allow to go so far to the neutron-rich side close to the Island of Stability. The observation of gravitational waves as well as electromagnetic waves originating from a neutron star merger has been published on October 16, 2017 and is a first proof of the nucleosynthesis of heavy elements in the r-process. It still remains an open question if superheavy nuclei have been formed in our universe. To answer these questions, we need insight into the nuclear properties of the heaviest elements and how these properties evolve when one moves toward to the neutron-rich side on the nuclear chart. In the NEXT project, I will set out to discover new, Neutron-rich, EXotic heavy nuclei using multi-nucleon Transfer reactions. I will measure their masses and, thus, pin down the ground state properties of these nuclei. These studies provide insight into the evolution of nuclear shells in the heavy element region. Furthermore, I will measure the fission half-lives of these isotopes. In order to realize the NEXT project, I will built a novel spectrometer, which is a combination of a solenoid separator and Multi-Reflection Time-of-Flight Mass Spectrometer. The broad experience in heavy element research and mass measurements that I have acquired over the years, and the unique infrastructure at my home institute that houses the AGOR accelerator, makes it so that I am ideally placed to start and lead the NEXT project.

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  • Funder: European Commission Project Code: 694345
    Overall Budget: 2,499,520 EURFunder Contribution: 2,499,520 EUR

    In this proposal the unique properties of unidirectional light driven molecular rotary motors will be built upon to achieve dynamic control of function and develop responsive systems with a particular focus on systems in water. Light-driven molecular rotary motors are distinct from the majority of molecular switches, as they allow sequential access to multiple functional states in a responsive system through non-invasive stimulation. Importantly, continuous irradiation induces continuous rotary motion which provides a unique opportunity to design dynamic systems and responsive materials that can be driven out-of-equilibrium. The research program is divided in four work-packages: a) chemical and redox driven unidirectional motors; here we will develop processive unidirectional motors that can use (electro)chemical energy in a continuous manner, b) amplification of motion; here rotary motors operate in assemblies to amplify mechanical function over a wide range of length scales. Specifically we will use liquid crystal-water interfaces as a unique platform to control motion and organization. c) dissipative self-assembly: molecular motors offer fantastic opportunities to control self-assembly and drive such systems out-of-equilibrium. We aim at metastable aggregate formation (hydrogels) and the design of amphiphilic motors for responsive self-assembled nanostructures; d)triggering biomolecular function; the goal is to use rotary motors to regulate DNA transcription and ultimately as genuine powering device to control cardiac cell function. In the emerging field of photopharmacology, we take advantage of non-invasive high spatio-temporal control that switching with light provides. The proposed research program is highly challenging but provides the comprehensive effort required to achieve control of complex nanomechanical systems and will opening a bright future for applications ranging from stimuli responsive materials to spatio-temporal control of biomolecular systems

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  • Funder: European Commission Project Code: 101207558
    Funder Contribution: 150,000 EUR

    Latent tuberculosis infection (TBI) occurs when someone is infected with Mycobacterium tuberculosis but does not have active TB disease. Those with TBI are at risk of developing active TB, with 8–10% progressing without antibiotic treatment, causing significant societal and economic impacts. Testing higher-risk groups, including immunocompromised individuals (e.g., those on immunosuppressive therapy, HIV-positive), close contacts with active TB cases, healthcare workers, and people from high TB prevalence countries (e.g., refugees), is crucial for TB control. The interferon-gamma release assay (IGRA) is a primary TBI test, detecting T cell immune responses to M. tuberculosis in blood. However, IGRA is technically challenging, requires long incubation times (24–48 hours), and incurs high costs (>100 EUR/test). These factors hinder the widespread screening of high-risk populations recommended by the WHO. We have developed a new technique, ProliSpot (patent pending), which detects antigen-specific T cell responses within several hours after collecting a blood sample and potentially overcomes the limitations of IGRA. This project's goal is to determine ProliSpot's in vitro diagnostic (IVD) potential for TBI testing. To achieve this, we will assess clinical feasibility by testing blood samples from TB patients and control subjects and compare the results with IGRA. Moreover, we will identify the subsequent steps needed for clinical development, particularly for the Investigational Medical Device Dossier (IMDD) and other requirements of the EU in vitro diagnostics regulations (IVDR). We will also perform pre-commercialization studies and define funding and networking strategies. Given that TBI testing is crucial for TB control, tens of thousands are screened annually in Europe, there is a societal need for increased TBI screening, and improved TBI testing methods are needed, the project's societal and economic impact is expected to be significant.

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