A5060698976- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- High-pressure geophysics and materials
- Semiconductor materials and devices
- Force Microscopy Techniques and Applications
- Ion-surface interactions and analysis
- Electronic and Structural Properties of Oxides
- Thin-Film Transistor Technologies
- Advanced Fiber Laser Technologies
- Advanced Surface Polishing Techniques
- Organic Electronics and Photovoltaics
- Silicon Nanostructures and Photoluminescence
- Conducting polymers and applications
- Carbon Nanotubes in Composites
- Silicon and Solar Cell Technologies
- Neuroscience and Neural Engineering
- Acoustic Wave Resonator Technologies
- Graphene research and applications
- Advanced Materials Characterization Techniques
- Advanced materials and composites
- Laser Material Processing Techniques
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Integrated Circuits and Semiconductor Failure Analysis
IMEC
2015-2024
Hasselt University
2015-2024
Czech Technical University in Prague
2014-2023
Material (Belgium)
1994-2021
Center for Integrated Quantum Science and Technology
2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2005-2017
CEA LIST
2005-2017
Integra (United States)
2016-2017
Oblastní nemocnice Kladno
2014-2015
Imec the Netherlands
2003-2015
An integrated route to quantum detection The properties of the nitrogen-vacancy (NV) center defect in diamond are being pursued as building blocks for quantum-enhanced technologies. Addressing and manipulating defects, however, typically requires bulk optics, which could limit scalability. Siyushev et al. developed an on-chip technique NV is detected optoelectronically. Such a manipulation method offers develop platform scalable quantum-based sensing Science , this issue p. 728
This letter reports on highly sensitive optical absorption measurements organic donor-acceptor solar cells, using Fourier-transform photocurrent spectroscopy (FTPS). The spectra cover an unprecedented dynamic range of eight to nine orders magnitude making it possible detect defect and disorder related sub-band gap transitions. Direct fully encapsulated cells with active layer poly[2-methoxy-5-(3′,7′-dimethyl-octyloxy)]-p-phenylene-vinylene:(6,6)-phenyl-C61-butyric-acid (1:4 weight ratio)...
Highly sensitive, multicomponent broadband photodetector devices are made from PbSe/graphene/TiO2. TiO2 and PbSe nanoparticles act as light harvesting photoactive materials the UV to IR regions of electromagnetic spectrum, while graphene acts a charge collector for both photogenerated holes electrons under an applied electric field. Detailed facts importance specialist readers published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They available...
The protocols for the control and readout of Nitrogen Vacancy (NV) centres electron spins in diamond offer an advanced platform quantum computation, metrology sensing. These are based on optical photons emitted from NV centres, which process is limited by yield collection. Here we report a novel principle detection magnetic resonance directly monitoring spin-preserving transitions through measurement centre related photocurrent. demonstrated direct technique offers sensitive way sensors...
Abstract High biocompatibility, variable size ranging from ≈5 nm, stable luminescence its color centers, and simple carbon chemistry for biomolecule grafting make nanodiamond (ND) particles an attractive alternative to molecular dyes drug‐delivery. A novel method is presented that can be used remote monitoring of chemical processes in biological environments based on changes photoluminescent (PL) nitrogen‐vacancy (NV) centers ND. The NV driven chemically by alternating the surface potential...
Abstract Chalcopyrite solar cells achieve efficiencies above 23%. The latest improvements are due to post‐deposition treatments (PDT) with heavy alkalis. This study provides a comprehensive description of the effect PDT on chemical and electronic structure surface bulk Cu(In,Ga)Se 2 . Chemical changes at appear similar, independent absorber or alkali. However, differs type treatment, although improvement cell efficiency is same. Thus, cannot be only treatment. main alkalis concerns...
A novel approach for preparation of ultra-bright fluorescent nanodiamonds (fNDs) was developed and the thermal kinetic optimum NV center formation identified. Combined with a new oxidation method, this enabled particles that were roughly one order magnitude brighter than prepared commonly used procedures.
Biocompatible nanoscale probes for sensitive detection of paramagnetic species and molecules associated with their (bio)chemical transformations would provide a desirable tool better understanding cellular redox processes. Here, we describe an analytical based on quantum sensing techniques. We magnetically coupled negatively charged nitrogen-vacancy (NV) centers in nanodiamonds (NDs) nitroxide radicals present bioinert polymer coating the NDs. demonstrated that T1 spin relaxation time NV is...
Abstract The aim of this paper is to summarise recent progress in the growth small grain‐sized Chemical Vapor Deposition (CVD) diamond often called nanocrystalline diamond, i.e., with grains typically smaller than 500 nm. Nanocrystalline (NCD) and Ultrananocrystalline (UNCD) films are new materials offering interesting applications nanobioelectronics electrochemistry. However NCD UNCD thin comprise entirely different structures which highlighted here paper. We discuss detail main differences...
ABSTRACT For an increased lifetime of polymer:fullerene bulk heterojunction (BHJ) solar cells, understanding the chemical and morphological degradation phenomena taking place under operational conditions is crucial. Phase separation between polymer fullerene induced by thermal stress has been pointed out as a major issue to overcome. While often effect on morphology BHJ investigated in darkness, here we observe that light exposure slows down crystallization phase at elevated temperatures....
Nanodiamonds have been gaining popularity in a variety of applications. These studies compare the cellular response to fluorescent, detonation, functionalized and drug-loaded nanodiamonds.
Efficient delivery of stabilized nucleic acids (NAs) into cells and release the NA payload are crucial points in transfection process. Here we report on fabrication a nanoscopic cellular carrier that is additionally combined with label-free intracellular sensor device, based biocompatible fluorescent nanodiamond particles. The sensing function engineered nanodiamonds by using nitrogen-vacancy color centers, providing stable non-blinking luminescence. device used for monitoring cells....
Nuclear spins in semiconductors are leading candidates for quantum technologies, including computation, communication, and sensing. diamond particularly attractive due to their extremely long coherence lifetime. With the nitrogen-vacancy (NV) centre, such nuclear qubits benefit from an auxiliary electronic qubit, which has enabled entanglement mediated by photonic links. The transport of information electron itself, via controlled transfer adjacent centre or dipolar interaction, would enable...
We propose and experimentally demonstrate a method to strongly increase the sensitivity of spin measurements on nitrogen vacancy (NV) centers in diamond, which can be readily implemented existing quantum sensing experiments. While charge state transitions this defect are generally considered parasitic effect avoided, we show here that these used significantly NV center's contrast, key quantity for high-sensitivity magnetometry high-fidelity readout. The protocol consists two-step procedure,...
Recent progress in chemical vapour deposition (CVD) diamond technology has enabled the preparation of high-quality n-type CVD layers using phosphorus as a dopant. can therefore be considered new interesting conventional wide-gap semiconducting material having both n- and p-type dopants, which makes it attractive for numerous applications high-temperature, high-voltage high-frequency devices. The concentration controlled range 1 × 1016–5 1019 cm−3 with carrier mobility exceeding 600 cm2 V−1...
Photothermal deflection spectroscopy (PDS) is used to study subgap optical absorption in chemical vapor deposited (CVD) diamond films. The high PDS sensitivity over a broad investigated spectral range enabled the investigation of main defect structure CVD upon changing deposition conditions. All films exhibit very characteristic shape infrared and visible regions, which scales with content amorphous carbon phase grain boundaries. In best-quality character fundamental edge attained reduced....
High-quality surface acoustic wave (SAW) filters based on aluminum nitride (AlN)/diamond layered structures were prepared using the nucleation side of polycrystalline chemical vapor deposition (CVD) diamond, removed from a silicon substrate by wet etching. Highly oriented AlN thin films with optimized piezoelectric properties and various thicknesses sputtered onto freestanding diamond. The effect thickness SAW phase velocity, coupling coefficient, device characteristics investigated....
The adhesion, growth and differentiation of human osteoblast-like MG 63 cells were investigated in cultures grown on nanostructured nanocrystalline diamond (NCD) films with either low surface roughness (rms 8.2 nm) or hierarchically organized surfaces made NCD deposited Si the original microroughness 301.0 nm 7.6 nm, respectively). using a microwave plasma-enhanced CVD method an ellipsoidal cavity reactor. treated oxygen plasma to enhance hydrophilic character (water drop contact angle...