Articles tagged with Monolayers
Researchers at Northwestern University have successfully increased molybdenum disulfide's light emission by twelve times by combining nanotechnology, materials science, and plasmonics. This breakthrough enables the material to be used in light emitting diode technologies and has potential applications in solar cells and photodetectors.
Researchers at Berkeley Lab have discovered a new pathway to valleytronics by selectively controlling photoexcited electrons/hole pairs in different energy valleys. This technique, based on the use of circularly polarized femtosecond light pulses, enables ultrafast manipulation of valley excitons for quantum information applications.
Researchers at MIT have developed a new method to build MoS2 light emitters that can be tuned to different frequencies, essential for optoelectronic chips. This breakthrough could lead to more energy-efficient and flexible displays.
Researchers discovered excitonic dark states in single-layer tungsten disulfide monolayers, revealing intense many-electron effects in 2D semiconductors. This finding holds promise for exploiting unusual light-matter interactions and enabling better designs of heterostructures.
Researchers have observed an ordered water monolayer on various solid surfaces at room temperature, contradicting the classical understanding of water's behavior. This phenomenon exhibits novel properties and affects surface characteristics, such as electrochemical property, wetting behavior, and friction.
Researchers created a single layer of nanoparticles on a liquid surface where properties can be easily switched. The DNA-coated nanoparticles' interactions and reorganization at the lipid interface affect their properties.
A researcher has studied the coupling of plasmon and dipolar collective modes in a monolayer of molybdenum disulfide (MoS2), a promising two-dimensional material. The investigation reveals that these collective excitations play a key role in describing many-body quantum systems, with potential applications.
Vanderbilt University PhD student Junhao Lin develops a method to craft metallic wires three atoms wide, opening doors for flexible and transparent electronic circuits. This breakthrough technique enables the creation of ultra-thin wiring for monolayer materials, paving the way for novel applications in electronics and beyond.
Researchers discovered a unique new two-dimensional semiconductor, rhenium disulfide, with direct-bandgap properties. The material's weak interlayer coupling makes it ideal for studying 2D physics and applications in tribology, solar cells, and valleytronics.
Physicists from Bielefeld University have developed a new process to produce ultrathin carbon membranes, which can filter out fine materials and separate gases. The method allows for the creation of customized nanomembranes with specific properties, such as thickness, transparency, and elasticity.
Graphene's interface properties have been studied, revealing how it interacts with other materials. A technique has been developed to make graphene-based stretchable devices by 'buckling' the material.
Researchers demonstrate highest reported drive current on a transistor made of a monolayer of tungsten diselenide, achieving ON currents as high as 210 uA/um and mobility of 142 cm2/V.s. The discovery is significant for future low-power and high-performance integrated circuits.
Researchers at NC State University have developed a new technique to create high-quality semiconductor thin films at the atomic scale. The technique enables the creation of wafer-scale MoS2 monolayer thin films with precise control over thickness, opening up possibilities for scalable production of lasers, LEDs and computer chips.
A team of researchers at Georgia Institute of Technology has developed a low-temperature method to dope graphene films using self-assembled monolayers. This technique allows for the creation of p-n junctions with minimal disruption to the material's lattice structure and significant electron/hole mobility.
A new process called chemical lift-off lithography (CLL) enables precise patterning of biomolecules at the nanoscale, avoiding diffused patterns. The technique uses chemically treated stamps to remove molecules already in place on gold substrates.
Scientists have successfully visualized adsorbed protein layers using evanescent wave imaging, demonstrating its potential for monitoring protein adsorption. The study optimized conditions by applying a polarized beam and incorporating a surface-enhanced medium, leading to significant increases in image contrast.
Researchers at the University of Leeds have developed a new technology to ensure correct drug crystal formation, eliminating polymorphism issues that result in significant losses. The system uses self-assembled monolayers to produce well-defined crystal structures, promising improved pharmaceutical efficiency and efficacy.
A recent study reveals that monolayer coverage and channel length set the mobility in self-assembled monolayer field-effect transistors, leading to the development of cost-effective chemical sensors. The research team's findings were published in Nature Nanotechnology and provide a widely applicable two-dimensional percolation model.
Research team investigates Campylobacter jejuni pathogenesis, finding two distinct patterns of interaction with epithelial cells. Strains that invade epithelial cells destroy them, while those that don't affect barrier properties or increase mediator production.
Researchers found two independent ways to modify metal work function using self-assembled monolayers, improving device characteristics. The study also showed that different metals have virtually identical work functions when covered with the same type of organic molecules.
Researchers at NIST demonstrate assembly of a single layer of organic molecules on a silicon crystal substrate compatible with CMOS manufacturing technology. The team builds a working molecular electronic device and verifies its functionality, paving the way for hybrid CMOS-molecular devices.
A team of researchers led by Kyung Byung Yoon found that manually applying microcrystals to a substrate yields superior results compared to self-assembly methods. The manual process allows for denser packing and more regular orientation of microcrystals, making it preferable in the overlapping range of 0.5 to 3 µm.
Organic transistors consume less energy than silicon transistors and can be constructed on flexible surfaces. Researchers linked p channel and n channel transistors in complementary circuits to save energy and create flexible electronic components.
Researchers at NIST have created a nanoscale electronic switch that can be turned on and off like a binary switch. The switch works by using silver whiskers to form a short circuit, which is easily detectable. Key benefits include high electrical resistance ratios and simplicity in engineering large arrays of switches.
A new microcontact insertion printing technique builds surfaces with specific functions inserted at known intervals, enabling analysis of biochemical mixtures and molecular-scale electronic components. The process allows for precise placement of isolated molecules in a predesigned nano-scale or micro-scale pattern.
The study reveals how ozone reacts with carbon-carbon double bonds to form crosslinked networks within the thin film, degrading organic surfaces with prolonged exposure. Understanding this reaction mechanism may lead to improved films for organic coatings and polymeric materials.
Researchers at PNNL developed thiol-SAMMS to remove mercury and other contaminants from produced waters. The technology, recently awarded for successful commercial use, has been licensed for production by Steward Advanced Materials.
Scientists create light-responsive colloidal particles that can be tailored to exhibit desired effects, including gel-to-fluid transitions and elastic property tuning. These innovations have vast potential applications in various fields such as ceramics, pharmaceuticals, and robotics.
Researchers found a single layer of water on a platinum surface is hydrophobic, repelling subsequent layers, contrary to previous assumptions about water molecule attachment points. The discovery challenges current theories and has implications for technological applications such as catalysis and corrosion.
Researchers at Penn State have developed a new type of ultrathin film made from spherical cages of carbon atoms, which can enable more precise patterning of electronic and sensing devices. The material's unique properties allow for easier replacement of molecules, expanding the range of molecular components that can be incorporated.
Researchers have developed a method to stabilize and control the conductance state of single molecules using tailored intermolecular interactions. This breakthrough could lead to the development of molecular memory components with reduced power usage.
Guohua Yang and Gang-yu Liu used scanning tunneling microscopy to study the behavior of thiols on gold surfaces, revealing up to 15 different structural phases. These findings shed light on the interaction between thiol molecules and the gold surface, potentially enabling the creation of patterns with other molecules.
Purdue University researchers have developed an ultrathin film containing single layers of nanometer-thick clay particles. This breakthrough could lead to the creation of smart materials with unique properties, such as sensors that detect biological and chemical agents more quickly and stronger plastics.
Researchers at MIT create a switchable surface that can change from water-attracting to water-repelling by applying an electric field, with potential applications in drug delivery and biomedical engineering. The surface's properties are controlled using conformational transitions, allowing for reversible modification.
Virginia Tech Professor James Wightman to tell the story of Benjamin Franklin and Agnes Pockels' groundbreaking work in surface chemistry. Pockels, a German hausfrau, was the first to determine cause and measure monolayer effects, paving the way for Langmuir-Blodgett films.
Weizmann Institute scientists developed a new method to incorporate organic molecules into electronic devices, controlling their properties and predicting behavior. The approach overcomes challenges in detecting electrical properties of organic molecules, enabling a feasible way to harness their diversity.
Researchers developed a method to create ultrathin films of polyelectrolytes with a layered architecture, which retains two-dimensional conformations after hydrolysis. This allows for the creation of composite structures with tailored surface properties and chemical reactivity.
Researchers at the University of Illinois have devised a way to modify metal surfaces with self-assembled monolayers of an inorganic compound, called silicotungstate. The resulting films exhibit superior stability and mechanical properties, making them suitable for corrosion inhibition and catalysis.