Catalyzing the Transformation of Waste Plastics into Value-Added Products Selective catalytic hydrogenolysis provides high-quality, value-added liquid products from polyethylene
A Second Life for Polyolefins as Biodegradable Surfactants This catalytic deconstruction of polyolefins, using Earth-abundant Zr catalyst and Al reactants, into valuable, biodegradable surfactant and detergent precursors, provides an economically and environmentally sustainable end-of-life for single-use plastics.
Competing orders and role of fluctuations in FeSe Above a critical pressure associated with the onset of magnetic order, superconducting and magnetic fluctuations exist over a wide temperature range above their respective bulk transition temperatures. Superconductivity in FeSe under pressure is bulk and competes with magnetism; measurements reveal fluctuations of superconductivity and magnetism likely due to their competing nature similar to other high-Tc superconductors.
Probing the Microstructure of Poly(Cyclosilane) The microstructure of poly(cyclosilane) was determined by 29Si solid-state NMR spectroscopy and density-functional theory calculations. The NMR and DFT calculation structure determination protocol will be useful to resolve the molecular structure of silicon-based materials, enabling structure-function relationships to be established.
Phase diagram of the van der Waals ferromagnet VI3 under pressure Van der Waals (vdW) materials are versatile systems for the study of magnetism in low dimensions. Motivated by the potential tunability of the new vdW ferromagnet VI3, a microscopic and thermodynamic study on bulk single crystals were performed under hydrostatic pressure using new techniques developed at Ames Laboratory.
The Surface Structure of Semiconductor Nanoparticles Revealed By mixing precipitated nanoparticles (NP) with boron nitride (BN) a 9-fold improvement in DNP NMR sensitivity was realized compared to established DNP protocols. This new protocol enables challenging 2D NMR experiments that reveal the structure and connectivity of atoms in a variety of semiconductor NP systems.
Direct imaging of unstained DNA origami DNA origami was deposited and directly imaged using scattering transmission electron microscopy, with spatial resolution adequate for detecting key nanometer-scale structural details. This work presents proof-of-concept results demonstrating that electron microscopy can be used to resolve key elements of DNA-based structures without the use of staining protocols.
Tailor Plasmons in Pentacene/Graphene Heterostructures with Interlayer Electron Transfer Van der Waals (vdW) heterostructures, which are produced by the precise assemblies of varieties of two-dimensional (2D) materials, have demonstrated many novel properties and functionalities. Here we report a nanoplasmonic study of vdW heterostructures that were produced by depositing ordered molecular layers of pentacene on top of graphene.
Catalyzing the Transformation of Waste Plastics into Value-Added Products Selective catalytic hydrogenolysis provides high-quality, value-added liquid products from polyethylene, enabling upcycling of an untapped feedstock
Dynamic Nuclear Polarization Using Radicals Created by γ-Irradiation γ-irradiation induced the formation of stable radicals that were used to polarize 29Si and 1H spins in inorganic and organic solids by dynamic nuclear polarization (DNP). γ-irradiation will enable magic angle spinning (MAS) DNP experiments on previously inaccessible non-porous inorganic solids and insoluble polymers.
