AlaaKalaf -

Lecturer

Ala Khalaf Jehad

Research Interests

Gender	FEMALE
Place of Work	Technical Engineering College/ Kirkuk
Department	Electronics and Control Engineering Techniques
Position	Lecturer
Qualification	PhD
Speciality	Physics
Email	ala.jehad13@ntu.edu.iq
Phone	00000000000
Address	NTU_Kirkuk-Iraq, Kirkuk, Kirkuk, Iraq

Academic Links

Contact

working experience

Academic Qualification

PhD

Feb 20, 2017 - Mar 17, 2021

PhD in Physics from Dokuz Eylul University
Izmir-Turkey in 2021

MSc

Feb 22, 2009 - May 18, 2013

MSc in Physics from Benghazi University
Benghazi-Libya in 2013

BSc

Sep 4, 2005 - Jul 15, 2008

BSc in Physics from Benghazi University
Benghazi-Libya in 2008

Working Experience

Physics [Lecturer at Electronic and Control Technologies Engineering Department/Technical Engineering College / Kirkuk]

Nov 13, 2024 - Present

Graphene- based Schottky Junction devices, SiC-based ultraviolet photodetector. [Postdoctoral Researcher at Izmir Institute of Technology, Department of Physics, Quantum Device Laboratory (QDL)]

Jan 1, 2022 - Jun 30, 2023

Researcher and Lab advisor

Electronics, Astronomy Physics, Electronic lab [Lecturer at Physics Department, College of Education of Pure Science - Kirkuk University]

Sep 15, 2013 - Jun 15, 2015

Electronics Course
- Led instruction for the undergraduate Electronics course, engaging an average of 100
students per semester.
- Designed and delivered lectures on fundamental concepts such as electronic devices,
diodes, p-n junctions, and field-effect transistors, as well as circuit theory.

Astronomy Physics course
- Delivered engaging lectures to an average of 80 undergraduate students per semester in
the foundational Astronomy Physics.
- Covered a range of topics including celestial coordinate systems, the solar system,
planetary science, stellar formation, galaxies, quasars, and the broader universe.
- Developed comprehensive quizzes, exams, and homework assignments to assess student
understanding and progress.

Lab Advisor
- Collaborated with a team of two teaching assistants to coordinate grading and laboratory
activities for both General Physics lab and Electronics lab.
- Designed and administered assessments, including quizzes and examinations, to
evaluate students' comprehension and learning outcomes.

Publications

Graphene-based photocatalysts for biomedical applications

Oct 3, 2024

publisher Springer Nature Switzerland

DOI https://doi.org/10.1007/978-3-031-66260-7_21

This chapter examines the diverse applications of graphene-based nanomaterials (GBNs) in biomedical applications, highlighting their roles in drug delivery, biosensors, imaging, and antibacterial applications. Graphene’s compatibility with biological tissues and its capacity to interact with cells emerge it as a notable material in biomedicine. The exceptional specific surface area and unique structure of GBNs enable strong adsorption capabilities and promising carrier functionalities. Furthermore, the modification of graphene oxide (GO) and reduced graphene oxide (rGO) with various substances enhances their water solubility, targeting capabilities, and biocompatibility.

Read Publication

High voltage response of graphene/4H-SiC UV photodetector with low level detection

Dec 25, 2023

Journal Journal of Alloys and Compounds

publisher Elsevier

DOI https://doi.org/10.1016/j.jallcom.2023.172288

Volume 969

A self-powered graphene/silicon carbide (G/4H-SiC) ultraviolet photodetector of a p-i-n like-structure with high voltage response has been fabricated to detect and measure low intensity ultraviolet (UV) radiation. Bilayer graphene sheet grown by chemical vapor deposition (CVD) method was transferred on the top of an epilayer structure of n-/n+ 4 H-SiC. In this structure, two Schottky contacts were formed: one at G/ n- 4H-SiC interface and the other at bulk-4 H-SiC/Cr/Au interface. The photodetector's characteristic measurements revealed low dark current of ∼ 0.58 nA and spectral voltage responsivity of ∼ 0.75 V/W at 300 nm wavelength.

Read Publication

CVD graphene/SiC UV photodetector with enhanced spectral responsivity and response speed

Jun 1, 2023

Journal Sensors and Actuators A: Physical

publisher Elsevier

DOI https://doi.org/10.1016/j.sna.2023.114309

Volume 355

A self-powered, high-performance graphene/Silicon Carbide (G/4H-SiC) ultraviolet Schottky junction photodetector has been fabricated, and the effect of using monolayer and bilayer graphene on the device performance parameters was investigated. P-type graphene sheets were grown by the chemical vapor deposition (CVD) method, while 4H-SiC material consists of an epilayer structure of n-/n+ on bulk n-SiC. Two photodetector devices have been studied, one with monolayer graphene (MLG) and the other with bilayer graphene (BLG). The proposed photodetector structure reveals the highest spectral responsivity known of a G/4H-SiC UV photodetector so far.

Read Publication

Investigation of graphene-based Schottky junction solar cell with heavy-doped silicon

Oct 27, 2021

Journal Journal of Materials Science: Materials in Electronics

publisher Springer US

DOI https://doi.org/10.1007/s10854-021-07270-x

Due to its outstanding features, graphene has become a vital topic in nanotechnology applications such as optoelectronic devices, sensors, batteries, and biomedical applications. This study has been focused on examining a heavily doped semiconductor in order to fabricate Schottky junction solar cell, where p-type graphene with heavily doped n-type silicon (p-G/n+-Si) Schottky junction solar cell with a top-window structure and active area of 0.11 cm2 has been fabricated using simple techniques without photolithography system. High-quality monolayer graphene sheet was synthesized by CVD method, while the back- and front-metal contacts were achieved by thermal evaporation system using Cr, Ag, and Au.

Read Publication

A comparative study for producing few-layer graphene sheets via electrochemical and microwave-assisted exfoliation from graphite powder

Mar 28, 2020

Journal Journal of Materials Science: Materials in Electronics

publisher Springer US

DOI https://doi.org/10.1007/s10854-020-03268-z

Issue 9

Volume 31

Graphene’s astonishing properties drew attention of many scientists to dedicate a lot of their time to find out more about this extraordinary material. However, challenges continue to produce high-quality graphene in large quantities by using inexpensive and readily available methods. In this study, three different graphite powders have been used as starting materials to produce few-layer graphene sheets, which are pure natural graphite (NGr) and two different electrochemically treated expanded graphite EE1 and EE2. Two simple and time-effective techniques have been applied on the samples interchangeably to investigate the order effect on producing graphene sheets in few-layer form. These techniques are sonication in dimethylformamide (DMF) for one hour and rapid microwave irradiation for 30 s.

Read Publication

Conferences