Nazieh Masoud, Ph.D.
Associate Professor
- Milwaukee WI UNITED STATES
- Allen Bradley Hall of Science: S242
- Physics and Chemistry
Dr. Nazieh Masoud's areas of expertise are carbon nanotubes and excimer lamps.
Education, Licensure and Certification
Ph.D.
Physics
Stevens Institute of Technology
2004
M.S.
Physics
University of Jordan-Amman
1997
B.S.
Physics
University of Jordan-Amman
1994
Biography
Areas of Expertise
Accomplishments
Karl O. Werwath Applied Research Award, MSOE
2021
Graduate Student Honorable Mention of the New York Section of the Society for Applied Spectroscopy (NYSAS)
2004
Event and Speaking Appearances
Characterization of Helium CAP Tubular Soure and Investigation of UHMWPE Surface Treatment
73rd Annual Gaseous Electronics Virtual Conference
2020-10-05
Development of a Hands-on Learning Activity on Potential DNA Damage and Skin Cancer for a Nursing Biochemistry Class
ASBMB Meeting Virtual
2020-04-18
Development of Portable UV light Source to be used in Chemistry Classes and Research Activitie
Fall Forum Presentations MSOE
2018-09-19
Hg Free Solid State Lightin
Third Annual Rutgers Energy Symposium NJ
2008-04-01
Collisional and Radiative Processes in High-Pressure Non-thermal Plasmas
XXVII International Conference on Phenomena in Ionized Gases (ICPIG) Eindhoven, The Netherlands
2005-07-17
Electron Driven Collisional and Radiative Processes in a Cylindrical Dielectric Barrier Discharge (C-DBD)
Second International Workshop on Microplasmas Stevens Institute of Technology, Hoboken, NJ
2004-10-06
A Cylindrical Dielectric Barrier Discharge (C-DBD) as a Source of Vacuum Ultraviolet (VUV) Radiatio
International Conference on Gas Discharges and their Applications Toulouse, France
2004-09-01
Patents
Fluorescent excimer lamps
US8946993B2
2015
Excimers are formed in a high pressure gas by applying a potential between a first electrode (14, 214) and a counter electrode (25, 226) so as to impose an electric field within the gas, or by introducing high energy electrons into the gas using an electron beam. A phosphor for converting the wavelength of radiation emitted from the formed excimers is disposed within the gas and outside a region (62, 162) where the excimers are expected to be formed, so as to avoid degradation of the phosphor.
High brightness excimer lamp
US8049417B2
2011
A high brightness excimer light source has an elongated tube containing an excimer-forming gas and electrodes for exciting the gas to form a plasma, and thus create excimers such as a rare gas halogen excimer or a rare gas excimer. Light emitted from the excimer propagating axially along the tube passes out of the tube through an exit device such as a lens or optical fiber at one or both ends of the tube.
Research Grants
Professional Summer Development Grant
MSOE
2012, 2018
Mercury-Free High Efficiency Fluorescent Lighting
Defense Advanced Research Projects Agency (DARPA)
2009
Entrepreneurial Partnering Fund
New Jersey Commission on Science and Technology (NJIT)
2007
Energy Efficient, Non-Mercury Fluorescent Lighting
Department of Energy (DOE)
2008
In-House Laboratory Independent Research Grant
In-House Laboratory Independent Research (ILIR)
2005, 2006
New Jersey Technology Fellowship
New Jersey Commission on Science and Technology
2006 - 2008
Postdoctoral Associateship Award
National Research Council (NRC)
2005
Selected Publications
Carbon Nanotube Generated Electron Beam Produced Plasmas
Plasma Sources Science and TechnologyMasoud, N., Martus, K. and Murnick, D.
2019
A device using an energetic electron beam from a carbon nanotube electron emitter has been developed to generate plasmas at pressures near or below atmospheric. The low-pressure electron source region (10−6 mbar) and the higher pressure (up to 1 atmosphere) plasma generation region are separated by a 300 nm SiN x window/membrane. The energy of the electron beam is of the order of 10 kV with a current of 10 μA prior to passing through the window, with nearly 85% of the beam passing through the window to the plasma generation region with a 10% loss in energy. The device could be operated in one of two modes, closed or opened. Closed mode operation has been used to generate excimer emissions from XeI* and XeCl* at 253 nm and 308 nm, respectively, at pressures below atmospheric. Ambient air has been used in the open mode operation with and without a flow of argon or helium across the SiN x window. Optical emission spectroscopy revealed that the open mode operation yielded a variation of excited state species that was found to be dependent on the electron beam energy and the neutral gas flow in the reaction region.
Plasma Induced by a Carbon Nanotube (CNT) Generated Electron Beam
IEEE International Conference on Plasma Science (ICOPS)Masoud, N., Martus, K., Murnick, D.
2017
A device using an energetic electron beam from a carbon-nanotube electron emitter was developed to generate an atmospheric pressure plasma. The low-pressure electron source region (10 -6 mbar) and the higher pressure (up to 1 atm) plasma generation region were separated by a 300 nm SiN x window/membrane. The energy of the electron beam was of the order of 10 kV with a current of 10 μA prior to passing through the window with nearly 85% of the beam passing through the window to the plasma generation region with a 10% loss in energy. The device could be operated in one of two modes, closed or opened. Closed mode operation was used to generate excimer emissions from XeI* and XeCl* at 253 nm and 308 nm, respectively, at pressures below atmospheric. Open mode operation was with ambient air and with a gas flow of Ar or He across the SiN x window. Optical emission spectroscopy revealed that the open mode operation yielded a variation of excited state species that was found to be dependent on the electron beam energy and the neutral gas flow in the reaction region. Identified in the spectra were the N 2 Second Positive System and the First Negative System, along with OH emission at 310 nm. The emission from the OH radical at 310 nm was found only with an Argon gas flow, whereas, the Helium flow produced an N 2 + emission at 391 nm. The excimer emission, produced in the closed mode operation, was also observed using optical emission spectroscopy. The Xenon pressure was varied between 100 and 500 Torr inside the closed reaction cell in which iodine crystals with a vapor pressure, at room temperature, of 0.2 Torr were placed. The maximum intensity of the excimer emission at 253 nm occurred at a pressure of 150 Torr. Production of the XeCl* excimer was facilitated by placing a chloride compound in the closed gas cell. Coatings with multilayers of Aluminum/Aluminum Oxide were necessary to protect the SiN x window from reactive etching produced by the halogen species.
High efficiency fluorescent excimer lamps: An alternative to mercury based UVC lamps
The Review of Scientific InstrumentsMasoud, N.M., Murnick, D.E.
2013
A high efficiency xenon excimer lamp radiating at 172 nm, with an internal phosphor coating shifting to UVC has been demonstrated, showing the feasibility of a cost effective alternative to UVC mercury lamps. Fluorescent lamps so designed can be fabricated in various geometries with high efficiency. Unlike other xenon excimer lamps based on dielectric barrier discharges this new system is highly compatible with existing and proposed phosphors as it operates in an inert gas environment at modest temperature and is subject only to 172 nm primary radiation. Using a lamp coated with a UVC phosphor we have demonstrated the feasibility of germicidal and curing lamps with 40% energy conversion efficiency and high power density. These lamps are rapidly switchable, have long projected lifetimes and are compatible with dimmers.
High Efficiency, Fluorescent Excimer Lamps, an Alternative to CFLs and White Light LEDs
Journal of Light & Visual EnvironmentMasoud, N.M., Murnick, D.E.
2013
An innovative high efficiency xenon excimer lamp radiating at 172 nm has been built inside a section of a commercial compact fluorescent light (CFL) tube and has demonstrated the feasibility of a high efficiency mercury free white light source. Such lamps can be fabricated in various geometries and sizes and can operate with equal efficiency over wide temperature and power ranges. The excitation mechanism used is similar to that employed in mercury lamps, but without the power and geometry constraints of radiation trapping. This new system is highly compatible with phosphors as it operates at modest temperature in an inert gas and the 172 nm primary radiation is narrow band. A prototype fluorescent white light lamp achieved an efficacy of 90 lm/W. Higher values are projected. The lamp is rapidly switchable, is compatible with dimmers, and is expected to have long operating life.
Study of interface mixing induced by Ar+ ion irradiation on Ag–Ge bilayer system
Applied Physics ANawash, J.M., Masoud, N.M., Al-Saleh, K.A., Saleh, N.S.
2009
A 400 keV 40Ar+ ion beam was utilized to induce mixing between two thin layers of Ag and Ge. Rutherford Backscattering Spectrometry and Electrical Resistivity Measurements were employed as probes to investigate the kinetics of ion mixing. The intermixed region was studied at several fluences up to 1.7×1017 ions/cm2 at a constant flux of 0.25 μA/cm2. The “RUMP” simulation computer code was used to assist in the evaluation of the experimental results from the spectra. The analysis of the Rutherford Backscattering Spectrometry spectra shows that increasing the Ar+ fluence enhances the Ag–Ge intermixing. To describe the mixing process, mixing rate parameters were calculated and compared with the theoretical models’ predictions. Børgesen’s local thermal spike model was found to accurately predict the diffusion in the Ag–Ge interface. An increase in the electrical resistivity of the film was detected during irradiation.
