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Selected Works

Selected Works

2017

Articles 1 - 5 of 5

Full-Text Articles in Nanoscience and Nanotechnology

S41598-017-16744-0.Pdf, Zlatan Aksamija Nov 2017

S41598-017-16744-0.Pdf, Zlatan Aksamija

Zlatan Aksamija

No abstract provided.

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Cobalt-Doped Ceria/Reduced Graphene Oxide Nanocomposite As An Efficient Oxygen Reduction Reaction Catalyst And Supercapacitor Material, Shaikh Parwaiz, Kousik Bhunia, Ashok Kumar Das, Mohammad Mansoob Khan Dr, Debabrata Pradhan Aug 2017

Cobalt-Doped Ceria/Reduced Graphene Oxide Nanocomposite As An Efficient Oxygen Reduction Reaction Catalyst And Supercapacitor Material, Shaikh Parwaiz, Kousik Bhunia, Ashok Kumar Das, Mohammad Mansoob Khan Dr, Debabrata Pradhan

Dr. Mohammad Mansoob Khan

 Design and development of highly active and durable oxygen reduction reaction (ORR) catalyst to replace Pt- and Pt-based materials are present challenges in fuel cell research including direct methanol fuel cells (DMFC). The methanol crossover and its subsequent oxidation at the cathode is another unwanted issue that reduces the efficiency of DMFC. Herein we report cobalt-doped ceria (Co-CeO2) as a promising electrocatalyst with competent ORR kinetics mainly through a four-electron reduction pathway, and it surpasses Pt/C by a great margin in terms of stability and methanol tolerance. The Co-CeO2 nanoparticles of diameter 4–7 nm were uniformly …

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Interfacial Thermal Transport In Monolayer Mos2- And Graphene-Based Devices, Zlatan Aksamija, Amin Salehi-Khojin, Cameron J. Foss, Arnab K. Majee, Fatemeh Khalili-Araghi Jul 2017

Interfacial Thermal Transport In Monolayer Mos2- And Graphene-Based Devices, Zlatan Aksamija, Amin Salehi-Khojin, Cameron J. Foss, Arnab K. Majee, Fatemeh Khalili-Araghi

Zlatan Aksamija

In many device architectures based on 2D materials, a major part of the heat generated in hot-spots dissipates in the through-plane direction where the interfacial thermal resistances can significantly restrain the heat removal
capability of the device. Despite its importance, there is an enormous (1–2 orders of magnitude) disagreement in the literature on the interfacial thermal transport characteristics of MoS2 and other transition metal dichalcogenides (TMDs) (0.1–14 MW m−2 K−1). In this report, the thermal boundary conductance (TBC) across MoS2 and graphene monolayers with SiO2/Si and sapphire substrates is systematically investigated using a
custom-made electrical thermometry platform followed by 3D …

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Progress Towards Terahertz Acoustic Phonon Generation In Doping Superlattices, Thomas E. Wilson Mar 2017

Progress Towards Terahertz Acoustic Phonon Generation In Doping Superlattices, Thomas E. Wilson

Thomas E. Wilson

Progress is described in experiments to generate coherent terahertz acoustic phonons in silicon doping superlattices by the resonant absorption of nanosecond-pulsed far-infrared laser radiation. Future experiments are proposed that would use the superlattice as a transducer in a terahertz cryogenic acoustic reflection microscope with sub-nanometer resolution.

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Impact Of Mismatch Angle On Electronic Transport Across Grain Boundaries And Interfaces In 2d Materials, Zlatan Aksamija Dec 2016

Impact Of Mismatch Angle On Electronic Transport Across Grain Boundaries And Interfaces In 2d Materials, Zlatan Aksamija

Zlatan Aksamija

We study the impact of grain boundaries (GB) and misorientation angles between grains on electronic
transport in 2-dimensional materials. Here we have developed a numerical model based on the firstprinciples
electronic bandstructure calculations in conjunction with a method which computes electron
transmission coefficients from simultaneous conservation of energy and momentum at the interface to
essentially evaluate GB/interface resistance in a Landauer formalism. We find that the resistance across
graphene GBs vary over a wide range depending on misorientation angles and type of GBs, starting
from 53 Ω μm for low-mismatch angles in twin (symmetric) GBs to about 1020 Ω μm …

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