A5113985746- Terahertz technology and applications
- Plant and animal studies
- thermodynamics and calorimetric analyses
- Spectroscopy and Quantum Chemical Studies
- Plant Pathogens and Resistance
- Biofield Effects and Biophysics
- Microbial Inactivation Methods
- Photoreceptor and optogenetics research
- Spectroscopy and Laser Applications
- Mechanical and Optical Resonators
- Plant and Biological Electrophysiology Studies
- Quantum Mechanics and Applications
- Photonic and Optical Devices
- Various Chemistry Research Topics
- Gene Regulatory Network Analysis
- Chemical and Physical Studies
- Computational Drug Discovery Methods
- 3D Printing in Biomedical Research
- Advanced Biosensing Techniques and Applications
- Quantum Electrodynamics and Casimir Effect
- Advanced Thermodynamics and Statistical Mechanics
- Plant Pathogens and Fungal Diseases
- Origins and Evolution of Life
Laboratoire Charles Coulomb
2018-2023
Université de Montpellier
2018-2023
Institut d'Électronique et des Systèmes
2018-2022
Centre National de la Recherche Scientifique
2022
Both classical and quantum electrodynamics predict the existence of dipole-dipole long-range electrodynamic intermolecular forces; however, these have never been hitherto experimentally observed. The discovery completely new unanticipated forces acting between biomolecules could considerable impact on our understanding dynamics functioning molecular machines at work in living organisms. Here, using two independent experiments, basis different physical effects detected by fluorescence...
Theoretical and experimental evidence for collective vibrations of a protein subject to an external energy supply support the hypothesis that biochemical reactions in living cells are mediated by electrodynamic forces.
The terahertz absorption spectra of sodium magnesium chlorophyllin (Chl-Mg-Na) and copper (Cu-Chl), two major members the chlorophyll derivative family, have been measured in range 0.2−3.0 THz (6.6−100 cm<sup>-1</sup>), at room temperature. Additionally, surface-enhanced Raman scattering spectroscopy was used to supplement data higher frequency range. capability for quantitative characterization Chl-Mg-Na intermolecular vibrations investigated sensitivity 1.82-THz feature with degree...
We present experimental studies of THz detection by different Heterojunction Bipolar Transistors (HBTs) fabricated using InP technology. also show that the sensitive HBTs detectors can be used for spectroscopy and 2D imaging to study how water content affects polarization rate biattenuation in fibrous sorghum leaf.
Grapevine trunk diseases affect grapevines worldwide and dramatically shorten the longevity of vineyards. This study has successfully demonstrated use THz time-domain imaging to identify grapevine wood tissues degraded by fungi responsible for diseases.
We have recently experimentally demonstrated, for the first time, activation of long-range attractive electrodynamic forces between proteins by means THz spectroscopies, supported fluorescence cross correlation spectroscopy and numerical simulations. Our experimental work provides a proof principle out-of-equilibrium collective oscillations dipole-dipole intermolecular forces. It paves way exploring potential role in living matter.
Understanding the forces that enable protein interactions is a major scientific challenge. Indeed, Brownian diffusion alone, which usually considered as main engine of dynamics, does not explain rapidity and efficiency biomolecular reactions at works in cells. In this work, we will present observations collective oscillations model driven out-of-equilibrium by means optical excitation aqueous medium using terahertz spectroscopy.
Characterization of current noise in simulated electrical systems relies on the Fourier transform auto-correlation electrons velocity. A similar characterization can also be done simulation biological systems, which a statistical mechanics description through calculation trajectories atoms over time. In such system, quantity calculated same way as defining, whether it has functional significance or compared to experiments Mega TeraHertz range. To exemplify this, we carried out model protein,...
Abstract The low-frequency (terahertz) vibrational spectroscopy of two chlorophyll species, Chl-𝑎 and one its magnesium derivatives (Chl-Mg-Na), has been investigated experimentally. combination terahertz time-domain Fourier transform infrared enabled a broad frequency range to be covered (0.2 18 THz). For Chl-Mg-Na, the spectra show clear well-marked features at 1.44, 1.64, 1.83 THz dominated by intermolecular interactions. dependent refractive index absorption coefficient Chl-Mg-Na were...
The terahertz absorption spectra of sodium magnesium chlorophyllin (Chl-Mg-Na) and copper (Cu-Chl), two major members the chlorophyll derivative family, have been measured in range 0.2-2.5 THz, at room temperature. capability spectroscopy for quantitative characterization Chl-Mg-Na intermolecular vibrations was investigated sensitivity transitions with degree hydration by changes molecular environment examined. For Cu-Chl derivative, a broad feature observed around 1.8 THz which currently...
Terahertz time-domain spectroscopy has been used to investigate the vibrational spectra of polycrystalline sodium magnesium chlorophyllin - one natural derivatives chlorophyll over temperature range 88 K–298 K. A number well-resolved absorption peaks were observed in frequency 0.2–2.5 THz, which are interpreted as originating from mixed character intramolecular and intermolecular vibration modes. As is increased, features resolve into broader peaks. The peak centered at 1.83 THz shifts...
We experimentally demonstrate, for the first time, activation of long-range attractive electrodynamic forces between proteins by means THz spectroscopy. Our experimental work provides a proof principle out-of-equilibrium collective oscillations and related dipole-dipole intermolecular forces. It paves way exploring potential role in living matter.