Roman Rakhmanov

ORCID: 0009-0008-0642-0053
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Research Areas
  • MXene and MAX Phase Materials
  • Plasma Applications and Diagnostics
  • Electrohydrodynamics and Fluid Dynamics
  • Antenna Design and Analysis
  • Plasma Diagnostics and Applications
  • Energy Harvesting in Wireless Networks
  • Electromagnetic wave absorption materials
  • Advanced Antenna and Metasurface Technologies
  • Fusion materials and technologies
  • Laser Design and Applications
  • High-Temperature Coating Behaviors
  • RFID technology advancements
  • Nuclear Materials and Properties
  • Graphene and Nanomaterials Applications
  • Microbial Inactivation Methods
  • 2D Materials and Applications
  • Mass Spectrometry Techniques and Applications

Drexel University
2018-2024

Moscow Engineering Physics Institute
2014

New ultrathin and multifunctional electromagnetic interference (EMI) shielding materials are required for protecting electronics against pollution in the fifth-generation networks Internet of Things era. Micrometer-thin Ti3C2Tx MXene films have shown best EMI performance among synthetic so far. Yet, effects elemental composition, layer structure, transition-metal arrangement on properties MXenes not been explored, despite fact that more than 30 different reported, many possible. Here, we...

10.1021/acsnano.0c01312 article EN ACS Nano 2020-03-12

Highly integrated, flexible, and ultrathin wireless communication components are in significant demand due to the explosive growth of portable wearable electronic devices fifth-generation (5G) network era, but only conventional metals meet requirements for emerging radio-frequency (RF) so far. Here, it is reported on Ti

10.1002/adma.202003225 article EN Advanced Materials 2020-11-30

Abstract The origin of MXene's excellent electromagnetic shielding performance is not fully understood. MXene films, despite being inhomogeneous at the nanometer scale, are often treated as if they compared to bulk conductors. It reasonable wonder treatment a homogeneous material remains valid very small film thickness and it depends on interlayer spacing. goal present work test model applicable nanometer‐thin Ti 3 C 2 T x films and, so, investigate how parameters may depend variations in...

10.1002/adfm.202410591 article EN Advanced Functional Materials 2024-09-09

The quick progress in communication technologies demands superior electromagnetic interference (EMI) shielding materials. However, achieving a high effectiveness (SE) with thin films, which is needed for microscale, flexible, and wearable devices, through absorption of EM radiation remains challenge. 2D titanium carbide MXene, Ti3C2Tx, has been shown to efficiently reflect waves. In this paper, we investigated the ultrathin printed Ti3C2Tx films recorded up 50% 4 nm-thick films. This...

10.1063/5.0176575 article EN Applied Physics Letters 2023-11-13

Nanosecond-pulsed discharge in liquid nitrogen ignited using a needle electrode and positive 60 kV high voltage pulses was characterized fast shadow imaging, as well optical emission spectroscopy. Estimation of temperature done molecular second system ro-vibrational transition spectra, the maximum increase is estimated to be ~60 K. We also report on first observations plasma-generated unstable material from nitrogen, presumably form polynitrogen compound.

10.1088/1361-6463/ab30f1 article EN Journal of Physics D Applied Physics 2019-07-11

Thin films of two-dimensional MXene (Ti3C2Tx) are evaluated in terms their conductivity over the radio frequency (RF) range 1–10 GHz using a custom designed test fixture. A contactless method is developed for extracting various thickness (1.0–4.3 μm) at RF frequencies. Open ended transmission lines with thicknesses spray-coated on polyethylene terephthalate substrates capacitively coupled to copper line fixture realized RT/duroid (filled polytetrafluoroethylene composite laminate) substrate...

10.1063/5.0002514 article EN Applied Physics Letters 2020-05-04

Nanosecond-pulsed plasma ignited in liquid nitrogen is a unique tool for the synthesis of unconventional materials due to combination energetic properties discharge itself (high densities reactive species, pressures and radiation) with low temperature surrounding dense liquid. Here, we report on applications such polymeric compound, preliminarily identified as neutral or ionic N6, from sodium azide precursors.

10.1088/1361-6463/ab349a article EN Journal of Physics D Applied Physics 2019-07-25

УСТАНОВКА ДЛЯ НАНЕСЕНИЯ ПОКРЫТИЯ КАРБИДА БОРА И ТЕСТИРОВАНИЯ МАТЕРИАЛОВ ПОКРЫТИЙ ПРИ ИНТЕНСИВНОМ ПЛАЗМЕННОМ ОБЛУЧЕНИИЭ.А.Азизов 2

10.21517/0202-3822-2014-37-4-30-38 article RU Problems of Atomic Science and Technology Ser Thermonuclear Fusion 2014-01-01

For safe handling and transport, the exterior surfaces of a container used to collect microorganisms should be disinfected. Though conventional methods are highly reliable, they could damage or destroy contents, rendering collection pointless. In this paper, pulsed subatmospheric pressure microsecond spark discharge plasma jet, referred as pin-to-hole (PHD), was source ultraviolet (UV) radiation reactive oxygen nitrogen species (RONS) for sterilization inoculated with limited thermal impact....

10.1109/tps.2019.2936996 article EN IEEE Transactions on Plasma Science 2019-09-05

The application of strong electric fields in water and organic liquids has been studied for many years, because its importance electrical transmission processes practical applications biology, chemistry, electrochemistry. More recently, liquid-phase discharges have investigated, are being developed. Recent advances pulsed power technology permitted much faster voltage rise times (including the subnanosecond range) revealed that plasma-like phenomena can, fact, occur fluid phase...

10.1109/icops35962.2018.9575995 article EN 2020 IEEE International Conference on Plasma Science (ICOPS) 2018-06-24
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