[HTML][HTML] Unprecedented electrical performance of friction-extruded copper-graphene composites

B Gwalani, X Li, A Nittala, W Choi, M Reza-E-Rabby… - Materials & Design, 2024 - Elsevier
Copper-graphene composites show remarkable electrical performance surpassing
traditional copper conductors albeit at a micron scale; there are several challenges in …

Physical origin of enhanced electrical conduction in aluminum-graphene composites

K Nepal, C Ugwumadu, KN Subedi… - Applied Physics …, 2024 - pubs.aip.org
The electronic and transport properties of aluminum-graphene composite materials were
investigated using the ab initio plane wave density functional theory. The interfacial structure …

Sustain China's copper resources with domestic mining, trading, and recycling

J Yin, L Liu, H Ji, L Zhang, C Li, Z Yuan - Resources, Conservation and …, 2024 - Elsevier
Rapid urbanization and industrialization made China the world's largest refined copper
producer and consumer. Insufficient copper ore reserves necessitated significant imports …

Powder-metallurgical construction of graphene-like nanosheet network reinforced Cu composites towards balanced high-performance

L Que, R Han, M Dai, J Su, Y Guo, X Xu, X Jian, Z Zhou - Carbon, 2024 - Elsevier
The size and grain conformality of the metallurgical precursor powder significantly affect the
comprehensive properties of metal matrix composites. To address this challenge …

Electronic conductivity in metal-graphene composites: the role of disordered carbon structures, defects, and impurities

K Nepal, C Ugwumadu, A Gautam… - Journal of Physics …, 2024 - iopscience.iop.org
This paper explores the transport properties of aluminum-carbon composite material via ab
initio methods. Interfacial and elec-tronic dynamics of the aluminum-graphene interface …

Computer simulation of carbonization and graphitization of coal

C Ugwumadu, R Olson III, NL Smith, K Nepal… - …, 2023 - iopscience.iop.org
This study describes computer simulations of carbonization and graphite formation,
including the effects of hydrogen, nitrogen, oxygen, and sulfur. We introduce a novel …

[HTML][HTML] The structure of appalachian coal: Experiments and Ab initio modeling

C Ugwumadu, DA Drabold, NL Smith, J Trembly… - Carbon, 2024 - Elsevier
This study focuses on the construction of small-scale atomistic representations of three
Appalachian coals of different ranks–high volatile bituminous, low volatile bituminous, and …

[HTML][HTML] Structure, vibrations and electronic transport in silicon suboxides: Application to physical unclonable functions

C Ugwumadu, KN Subedi, R Thapa, P Apsangi… - Journal of Non …, 2023 - Elsevier
This work focuses on the structure and electronic transport in atomistic models of silicon
suboxides (a-SiO x; x= 1.3, 1.5 and 1.7) used in the fabrication of a Physical Unclonable …

Predicting thermoelectric figure of merit in complex materials: What do we need to know?

DR Basaula, M Daeipour, B Feygelson, S Nakhmanson - Acta Materialia, 2024 - Elsevier
In a complex nanostructured material or composite, the thermoelectric figure of merit, ZT (T),
is strongly dependent on the morphology and transport properties of interfacial areas that …

Defect effect of graphene on interface properties of copper/graphene/copper composite: A first-principles study

S He, B Liu, Z Pei, X Zhang, B Liu… - Journal of Applied …, 2023 - pubs.aip.org
The introduction of defects in graphene will affect the mechanical and electrical properties of
the composite interface. We investigate the effect of Stone–Wales (SW), single-vacancy …