Ultralight, strong, and self-reprogrammable mechanical metamaterials.

Versatile programmable materials have long been envisioned that can reconfigure themselves to adapt to changing use cases in adaptive infrastructure, space exploration, disaster response, and more. We introduce a robotic structural system as an implementation of programmable matter, with mechanical performance and scale on par with conventional high-performance materials and truss systems. Fiber-reinforced composite truss-like building blocks form strong, stiff, and lightweight lattice structures as mechanical metamaterials.

Electron scattering cross section calculations for polar molecules over a broad energy range.

We report computational integral and differential cross sections for electron scattering by two different polar molecules, HCN and pyrimidine, over a broad energy range. We employ, for low energies, either the single-centre expansion (ePOLYSCAT) or the R-matrix method, while for the higher energies we select a corrected form of the independent-atom representation (IAM-SCAR). We provide complete sets of integral electron scattering cross sections from low energies up to 10,000 eV.

Electron scattering cross sections from anthracene over a broad energy range (0.00001-10,000 eV).

We report a computational investigation of electron scattering by anthracene (C14H10) in the gas phase. Integral and differential cross sections have been calculated by employing two distinct ab-initio quantum scattering methods: the symmetry adapted-single centre expansion method (ePOLYSCAT) and a screening corrected form of the independent atom model (IAM-SCAR) at low and high energies, respectively. After a detailed evaluation of the current results, we present a complete set of integral scattering cross sections from 0.

Electron scattering cross sections from HCN over a broad energy range (0.1-10,000 eV): Influence of the permanent dipole moment on the scattering process.

We report theoretical integral and differential cross sections for electron scattering from hydrogen cyanide derived from two ab initio scattering potential methods. For low energies (0.1-100 eV), we have used the symmetry adapted-single centre expansion method using a multichannel scattering formulation of the problem.

Modeling chemical evolution in a cold molecular plasma: quantum dynamics of CF2(-) intermediates after electron attachment.

A dynamical study is presented for the chemical processes induced by electrons (with energies up to about 16 eV) on gaseous CF(2) (X(1)A(1) state), one of the important components of plasma etching molecular mixtures. The nuclear deformations from the C(2v) initial geometry are seen to lead to different anionic intermediates that suggest different chemical evolutions into final fragments. All nuclear motions are shown to be effective for the formation of a variety of resonances which could lead to different final fragments.