Air–carbon ablation model for hypersonic flight from molecular-beam data

KS Prata, TE Schwartzentruber, TK Minton - AIAA journal, 2022 - arc.aiaa.org
Recent molecular-beam experiments of high-velocity atomic oxygen (O), atomic nitrogen
(N), and molecular oxygen (O 2) impacting carbon material at high temperature produced …

Spin-dependent reactivity and spin-flipping dynamics in oxygen atom scattering from graphite

Z Zhao, Y Wang, X Yang, J Quan, BC Krüger… - Nature Chemistry, 2023 - nature.com
The formation of two-electron chemical bonds requires the alignment of spins. Hence, it is
well established for gas-phase reactions that changing a molecule's electronic spin state …

Coupled surface-volume pyrolysis effects of carbon-phenolic resin composites under hyperthermal non-equilibrium flows

Z Cui, Z Ye, J Zhao, X Sun, G Yao, D Wen - Physics of Fluids, 2022 - pubs.aip.org
The thermal protection system is essential for the safe and reliable flying of any high-speed
aircraft. A carbon fiber-reinforced phenolic resin (PR) composite is one of the most important …

Informing air–carbon ablation modeling with theoretical calculations of atomic oxygen and nitrogen interacting with carbon surfaces

R Nieman, M Sands, Y Wang, TK Minton… - Physical Chemistry …, 2023 - pubs.rsc.org
To understand the gas–surface chemistry above the thermal protection system of a
hypersonic vehicle, it is necessary to map out the kinetics of key elementary reaction steps …

High-Level Multireference Investigations on the Electronic States in Single-Vacancy (SV) Graphene Defects Using a Pyrene-SV Model

R Nieman, VP Oliveira, B Jayee… - The Journal of …, 2023 - ACS Publications
The nonplanar character of graphene with a single carbon vacancy (SV) defect is
investigated utilizing a pyrene-SV model system by way of complete-active-space self …

Coverage-Dependent Site-Specific Placement and Correlated Diffusion of Atomic Oxygen on Moiré-Patterned Graphene on Ru (0001)

J Wagner, SJ Sibener - The Journal of Physical Chemistry Letters, 2024 - ACS Publications
Nano-periodic arrays of atomic oxygen are visualized on epitaxial graphene on Ru (0001)
via STM following supersonic beam exposure to non-equilibrium fluxes of atomic oxygen …

Oxidation of Multi-layer Graphite Using an Atomistic Multi-lattice Kinetic Monte Carlo Model

S Edward, HT Johnson - The Journal of Physical Chemistry C, 2023 - ACS Publications
Thermal protection systems (TPSs) in hypersonic vehicles are primarily made from carbon-
based materials and are used to protect against damage in re-entry conditions. These …

Nitric Oxide Scattering off Graphene Using Surface-Velocity Map Imaging

T Greenwood, SPK Koehler - The Journal of Physical Chemistry C, 2021 - ACS Publications
We investigated the scattering of nitric oxide, NO, off graphene supported on gold. This is of
fundamental importance to chemistry as collisions are the necessary first step to chemical …

Putting the Incoming/Outgoing Correlation (INOUTCO) Ion Imaging Surface Scattering Technique to the Test in O Atom Scattering from Graphite

Z Zhao, X Yang, Y Wang, J Quan, J Zhou… - The Journal of …, 2024 - ACS Publications
The interaction of hyperthermal oxygen atoms with graphitic carbon surfaces is of
fundamental interest due to its importance in aerospace material degradation and in …

Extracting Residence Times of Nitric Oxide on Graphene through Combination of Time-of-Flight and Velocity Map Imaging

T Greenwood, SPK Koehler - The Journal of Physical Chemistry C, 2024 - ACS Publications
In this work, energy transfer between nitric oxide radicals and graphene was measured as a
function of incidence energy, and residence times of the trapped NO molecules were …