Articles tagged with Chirality
Researchers discuss theoretical frameworks for electromagnetic chirality in chiral materials and fields, enabling understanding of complex chiroptical phenomena. Chirality is a qualitative property but measurable quantities can be described using chiroptical parameters.
Scientists discovered that the ratio of chiral alpha-pinene molecules varies with altitude, time of day, and season in the Amazon rainforest. Insects, particularly termites, are found to be a significant source of plus-alpha-pinene, previously unknown in forest emissions.
Researchers simulated a 3D chiral topological insulator using nitrogen-vacancy centers, observing dynamical bulk-surface correspondence and symmetry protection in momentum space. They measured spin textures on band inversion surfaces, revealing perfect (broken) topology depending on the preserved or broken chiral symmetry.
Physicists at the University of Bath have accurately measured and characterised a single, twisted nanoparticle using a new method, taking them closer to producing medicines on demand. The discovery could lead to mini-labs that can mix substances in a completely new way, producing pharmaceuticals from minute droplets of active ingredients.
Researchers at the University of Chicago have developed a way to stretch and strain liquid crystals to generate different colors, leading to a wide range of optical effects. This technology has potential applications in temperature and strain sensors, enabling remote measurement without contact.
Researchers have observed that palladium gallium (PdGa) reaches the maximum allowed Chern number of four, a fundamental aspect yet to be settled in topological physics. The team also demonstrated control over the sign of the Chern number by manipulating the crystal's handedness during growth.
Researchers developed a platform for rapid chiral analysis, producing chromatogram-like output without separation. The method effectively resolved a wide range of chiral molecules, including pharmaceuticals and biomolecules.
A Cornell-led collaboration has developed a new electrochemical reaction that enables the creation of chiral molecules, crucial for drug synthesis. The breakthrough could lead to the manufacture of a host of new, low-cost drugs with improved efficacy and reduced production costs.
Researchers at GIST designed new chiral ligands to generate useful compounds in a single step, achieving high enantioselectivity and efficiency. The novel catalytic reaction paves the way for synthesizing novel drugs and natural products with numerous bioactivities.
Researchers have developed a novel approach for chiral drug synthesis in living systems, utilizing neutrophil-directed asymmetric transfer hydrogenation. This method enables site-selective synthesis of enantiomers, which is crucial for controlling the pharmacological activity of chiral drugs like Ibuprofen.
Researchers at CIC biomaGUNE have developed a mechanism to deposit gold atoms onto gold nanorods in a helicoidal structure, producing
Researchers at Max Planck Institute for Chemical Physics of Solids successfully realized chiral topological compound PtGa, exhibiting a high topological charge of 4. This property enables the generation of a large quantized photogalvanic current that can be manipulated by incident light polarization.
Researchers at the University of Halle have found a way to spontaneously generate molecules with uniform chirality in liquids, liquid-crystalline and crystalline materials. This breakthrough could lead to new active substances and materials science applications.
Researchers developed solid state and time-step VCD methods to study chirality amplification in supramolecular systems. These enhancements allowed detection of chiral gels, metal complexes, and molecular pairs on solid surfaces, opening a new horizon for VCD spectroscopy.
Researchers design an experiment to demonstrate chirality-dependent optical lateral force on microparticles, achieving robust bidirectional sorting and reversible optical lateral forces. The study opens new avenues for direct detection and sorting of microparticles with imperceptible chemical differences.
Researchers propose that cosmic rays influenced the evolution of DNA-based life on Earth, promoting one form of molecular handedness over its mirror image. This idea suggests a connection between fundamental physics and the origin of life, with potential experiments to test their hypothesis.
Scientists from HKBU developed a novel approach to manipulating molecular chirality using helical metal nanostructures. This method eliminates potential side effects associated with drugs containing molecules in incorrect chiral arrangements, enabling the mass production of purer and cheaper drugs.
The study demonstrates that nanoscale magnetic gyroids can adopt a large number of stable states, exhibiting ferromagnetic behavior without a unique equilibrium configuration. The findings establish gyroids as a candidate system for research into unconventional information processing and emergent phenomena relevant to spintronics.
Researchers have demonstrated a new metasurface laser that produces 'super-chiral light' with ultra-high angular momentum, enabling control over optical communications and applications in industries like food, computer, and biomedical. The laser design allows for high power operation in a compact design.
Chirality-induced spin selectivity (CISS) research reveals electrons are spin-polarized when passing through non-magnetic chiral molecules or crystals like CrNb3S6. This phenomenon is puzzling, but it may enable the creation of spin-polarized states in materials without magnets.
Researchers designed a polymer that can twist and bend in response to light, mimicking human muscle movement. The polymer's chiral structure changes direction when exposed to different light sources, enabling simultaneous bending and twisting motions.
Researchers at the University of Illinois have used high-resolution microscopy tools to study an unusual type of superconductor, uranium ditelluride (UTe2). The measurements reveal strong evidence for the presence of exotic Majorana particles on its surface, which could provide insights into fundamental physics and quantum computing.
Researchers have developed a method to synthesize one-handed chiral rotaxanes, which can selectively bind to gold atoms and catalyze chemical reactions. This breakthrough enables the creation of single-handed chiral molecules, addressing potential issues with pharmaceutical drug efficacy.
Researchers have developed a novel planar chiral mirror that preserves the spin of light upon reflection, overcoming limitations of traditional mirrors. This innovation has potential applications in quantum information processing and quantum optics.
Scientists demonstrate a reconfigurable chiral microlaser in a symmetric WGM microcavity, achieving unprecedented control over laser directionality and chirality. The device exploits the optical Kerr nonlinearity to break symmetry spontaneously, enabling all-optical control of chirality.
Physicists have induced and measured nonsymmetrical states in a layered material using circularly polarized mid-infrared light. This phenomenon, known as chirality, can be controlled and enhanced by shining the light beam at specific conditions, demonstrating a new tool for manipulating electronic behavior in materials.
Researchers developed a regioselective magnetization strategy to create semiconducting heteronanorods with chiroptical activities. This approach enables tuning of chiroptical activity through electric and magnetic transition dipoles.
Researchers at Université de Montrêl have successfully used biocatalysis to control the shapes of large ring molecules, called macrocycles. This breakthrough enables the creation of planar chiral macrocycles, which can be tailored for various applications including pharmaceuticals and electronics.
Scientists have discovered a new type of 3D chirality that exhibits unique macroscopic properties, including fluorescence and strong optical rotation. The discovery was made possible through the use of advanced synthesis techniques, including double cross-couplings and retro-synthetic analysis.
Researchers at TUM functionalized a simple rod-like building block with hydroxamic acids to form molecular networks displaying complexity and beauty. The networks exhibit exceptional properties and chiral symmetry, with unique opportunities for bottom-up nano-templating.
Researchers demonstrate direct emission of orthogonal handed circular polarization from achiral luminophore using liquid crystalline phase. The twisted structure allows for the generation of CP light with various polarization states.
A team of researchers from the University of Münster has developed a new synthetic method for producing all four stereoisomers of α,β-disubstituted γ-butyrolactones. The method uses two chiral catalysts working in tandem to efficiently produce the final product.
Researchers have developed a new method to observe changes in molecular chirality during chemical reactions in real time. They used femtosecond laser pulses with tailor-made polarization to follow the disappearance of chirality after bond breakage.
A KAIST research team has developed a gallium-based metal complex enabling the rapid chiral analysis of alcohols using nuclear magnetic resonance spectroscopy. This new method can determine enantiomeric excess within minutes, benefiting researchers in organic chemistry and the pharmaceutical industry.
Researchers at MIT have found that coating nanoparticles with right-handed molecules of the amino acid cysteine can improve their ability to avoid being destroyed by enzymes in the body. This approach also allows them to enter cancer cells more efficiently, making it a promising method for developing more effective drug carriers.
A research team at The University of Tokyo has successfully produced helixes that twist preferentially in a particular direction, shedding light on the origin of life's chirality. This breakthrough may lead to new and cheaper drug production methods and finally address the lingering question of how life began.
Researchers have synthesized a new type of chiral light that can tell right- and left-handed molecules apart. This innovative light interacts differently with each type of molecule, allowing for precise control over chemical reactions and potential applications in drug development.
A team at the University of Michigan developed a new catalyst that selectively produces the correct version of twisted molecules, which are essential for medicines. The catalyst is made from mineral nanoparticles and can work in water, reducing costs and environmental impact.
Rice chemists disentangled the mysterious interactions between bovine serum albumin and gold nanorods, revealing multilevel chirality and a possible way to sense single proteins' handedness. This discovery could lead to the development of drug-sensing tools with improved accuracy.
A team of physicists and engineers measured the tensile strengths of individual structure-defined single-walled carbon nanotubes, finding that their strength depends on both the chiral angle and diameter. The study provides a fundamental insight into developing super-strong and ultra-lightweight materials.
Scientists developed a nanomaterial that can detect the twist direction of molecules with ultra-sensitivity, removing a major roadblock in research. The material's unique symmetry properties allow for sensitive detection of molecular chirality, which is crucial in pharmaceuticals and materials science.
Researchers from Helmholtz-Zentrum Dresden-Rossendorf and Helmholtz-Zentrum Berlin have discovered a unique chiral effect in magnetic materials. The team created parabolic strips of Permalloy, which exhibited a surprisingly strong delayed response to a reversed magnetic field due to curvature-induced chiral properties.
Researchers at São Paulo State University discovered that breaking time-reversal symmetry creates molecules with spin-polarized orbitals, allowing for the encoding of information. This phenomenon could be exploited in quantum computing and spintronics to develop faster, more efficient devices.
A team of scientists led by OHIO Professor Saw-Wai Hla developed a molecular propeller that enables unidirectional rotations on a material surface when energized. The tiny propeller, composed of three components, can be controlled using an electric field or mechanical force.
Researchers from Kanazawa University have developed a three-state switchable chiral stationary phase that can be controlled using metal ions, enabling efficient separation of enantiomers. The phase's stability and separation performance were demonstrated over multiple cycles, opening new doors for drug discovery and other research areas.
Researchers have developed a chiral separation membrane using two-dimensional layered materials, showing high selective permeation efficiency among various enantiomers. The membrane can efficiently separate left-handed and right-handed molecules like limonene, with potential applications in sewage processing and desalination.
Scientists have identified a unique chiral coupling that allows spins in different magnetic layers to interact over long distances, even if they are not adjacent. This discovery opens up novel opportunities for engineering complex magnetic configurations to store and process data more efficiently.
Researchers created a novel solid-state spin filtering device with artificial molecular motors that switch spin polarization direction by light irradiation and thermal treatments. The device demonstrates 4 times chirality inversion, allowing for precise control of spin-polarization direction in spin-polarized currents.
Scientists have successfully synthesized helical ladder polymers using a novel electrophilic aromatic substitution method. The resulting molecules exhibit well-defined right-handed helical geometry and can be modified to create nanoscale architectures for various applications.
A team of researchers discovered polar skyrmions in an electric material, opening up a plethora of materials systems and physical phenomena to explore. The combination of polar skyrmions and electrical properties may allow for the development of novel devices with significant interest to the Army.
Researchers at Cornell University and the University of California Berkeley have made a groundbreaking discovery in polar skyrmions, opening up new possibilities for novel devices. The team found that skyrmions can exhibit chirality in an electric material, which could be used to develop new data storage technologies.
Scientists at PSI investigate a novel material exhibiting electronic properties never seen before, including Rarita-Schwinger fermions and quadruple topological Fermi arcs. The crystal is a chiral topological semimetal with exotic physical phenomena, such as phase transitions at its surface.
Scientists at EPFL demonstrate for the first time that it is possible to use light to dynamically twist an individual electron's wave function. This enables the creation of an ultrafast vortex electron beam that can be used to encode and manipulate quantum information, as well as control magnetic materials.
Researchers from Hong Kong Baptist University have invented a new method that can detect target molecules in pharmaceuticals and pesticides in just five minutes. This breakthrough could lead to the production of higher quality medicinal drugs with no side effects.
A team of researchers has observed chirality in polar skyrmions for the first time in a material with reversible electrical properties. The discovery could lead to applications like more powerful data storage devices that continue to hold information even after being powered off.
Researchers have discovered that certain classes of chiral crystals can host electrons behaving like slowed down light, with collective behavior mimicking magnetic monopoles. The team found that these crystals can exhibit unique phenomena such as large Fermi arcs and electron spins that collectively behave like magnetic monopoles.
Scientists at Berkeley Lab have discovered a new state of quantum matter exhibiting nearly ideal topological surface properties due to its chirality. The spiral-crystal topological chiral conductor shows exceptional electrical conductivity with minimal resistance.
Scientists have discovered that the direction of laser light hitting a molecule determines its chiral form. This breakthrough could lead to more efficient production of molecules with uniform chirality for pharmaceuticals. The research was conducted using the planar formic acid molecule and the reaction microscope method.
Researchers at Kanazawa University have developed a new copper catalyst that can distinguish between two different carbonyl compounds and selectively synthesize one species of 1,2-diol. The catalyst uses a N-heterocyclic carbene ligand to activate the carbonyls and form a carbon-carbon bond.
Researchers have successfully reversed and made repulsive Casimir forces, tunable and enhanced by external magnetic fields. By inserting a chiral material between plates, they created an oscillatory force with large magnitude, reflecting macroscopic effects of quantum fluctuations.