Results 281 to 290 of about 246,481 (370)

Terahertz Raman Optical Activity Reveals Emergent Supramolecular Chirality in Mononucleotide G‐quadruplexes

Chemistry–Methods, EarlyView.
Self‐assembly of guanosine‐5′‐monophosphate into G‐quadruplexes induces a cation‐specific (sodium vs. potassium), intense terahertz Raman optical activity signal. The supramolecular helical arrangement gives rise to a distinct chiral vibrational signature in the low‐frequency region.
Štěpán Jílek, Josef Kapitán, Václav Profant   +2 more
wiley   +1 more source

Numerical study of terahertz radiation from N-polar AlGaN/GaN HEMT under asymmetric boundaries. [PDF]

Front Optoelectron
Xing R, Guo H, Guo B, Yu G, Zhang P, Zhou J, Yang A, Li Y, Hao C, Yue H, Zeng Z, Zhang X, Zhang B.   +12 more
europepmc   +1 more source

Spin‐Crossover in a Dinuclear Iron(II) Complex on Highly Oriented Pyrolytic Graphite: An X‐Ray Absorption Spectroscopy Study

ChemPhysChem, EarlyView.
This study investigates a spin‐crossover dinuclear Fe(II) complex deposited as a thin film under ultrahigh‐vacuum conditions by a pulsed layer injection technique. Its temperature‐dependent switching behavior, light‐induced excited spin‐state trapping, soft‐X‐ray‐induced excited spin‐state trapping, and temperature‐ and light‐induced spin crossover ...
Marcel Walter, Sebastien Elie Hadjadj, Clara Trommer, Jorge Torres, Jendrik Gördes, David Swerev, Tauqir Shinwari, Christian Lotze, Chen Luo, Florin Radu, Felix Tuczek, Sangeeta Thakur, Wolfgang Kuch   +12 more
wiley   +1 more source

Non-destructive detection of early wheat germination via deep learning-optimized terahertz imaging. [PDF]

Plant Methods
Li G, Ge H, Jiang Y, Zhang Y, Jin X.
europepmc   +1 more source

Evidence for Anion‐Anion Interaction in Amino Acid Ionic Liquids Probed by Far‐Infrared Spectroscopy

ChemPhysChem, EarlyView.
Spectroscopic evidence for doubly hydrogen bonded anionic dimers in amino acid ionic liquids is provided. The torsional motion of the amine groups is characteristic for cation‐anion and anion‐anion interaction as observed in far‐infrared spectra. Herein, it is shown that far‐infrared spectroscopy is a sensitive probe for detecting not only cation‐anion
David Kotwica, Ralf Ludwig
wiley   +1 more source

Real-Time 0.89 THz Terahertz Imaging with High-Electron-Mobility Transistor Detector and Hydrogen Cyanide Laser for Non-Destructive Nut Detection. [PDF]

Micromachines (Basel)
Zhang N, Liu H, Yan H, Wang H, Xie J, Jie Y, Yao D.   +6 more
europepmc   +1 more source

A Critical Overview of Common Foodborne Toxicants and Methods for Their Reliable Detection

Food Frontiers, EarlyView.
ABSTRACT Food is an essential commodity for human health. However, toxicants such as mycotoxins, heavy metals, acrylamide, and pesticides can be present in food either naturally or through processing, packaging, or some anthropogenic activities. A thorough review of carefully selected studies revealed that climate change and pandemics have led to an ...
Betty Bowe Acquah, John‐Lewis Zinia Zaukuu   +1 more
wiley   +1 more source

Terahertz Frequency-Modulated Continuous-Wave Inspection of an Ancient Enamel Plate. [PDF]

Sensors (Basel)
Fauquet F, Galluzzi F, Chapoulie R, Mounier A, Ben Amara A, Mounaix P.   +5 more
europepmc   +1 more source

Coherent Terahertz Hyper‐Raman Spectroscopy

Journal of Raman Spectroscopy, EarlyView.
In this paper, we review our recent discovery of a novel nonlinear effect in the terahertz frequency range, which we have termed terahertz hyper‐Raman (THYR) spectroscopy. This technique shares many characteristics with conventional hyper‐Raman spectroscopy but is applied within the THz spectrum.
Domenico Paparo, Anna Martinez, Andrea Rubano   +2 more
wiley   +1 more source