Samuel Stephen

• Investigation of quality complaints and finding root cause of products (Spectroscopic Microscopic and Inorganic)
• Microscopic analysis to explain structure property correlation of innovative products, plant / customer trial samples etc
• Characterization of newly developed products
• Analytical and Physical Testing of various polymer-based materials and their composites
• Preparing training materials according to requirements and assisting in trainings
• Responsible for preparing test methods, SOPs and Calibration records
• Support lab operations and Quality by conducting calibrations and SPCs.

• Key microscopy specialist for advanced TEM, SEM, supporting all of the university requirements
• Preparation of training materials, SOPs, Imparting training to the undergrad students in the safe handling of the laboratory instruments
• Prepare lab budgets, equipment purchase and operation
• Maintain and monitor an inventory of chemicals, consumables and its replenishment to ensure adequate resource levels
• The tenure with the University has resulted in 13 publications and papers as listed below.

· Tailored electrical conductivity, electromagnetic shielding and thermal transport in polymeric blends with graphene sheets decorated with nickel nanoparticles, . SP.Pawar, S.Stephen, S. Bose and V. Mittal , Phys. Chem. Chem. Phys. , 2015, DOI: 10.1039/C5CP00899A

· Water Confinement and Lewis Acidity in HY Nano zeolites: A High Temperature 1H and 27Al NMR Study, M.S. Katsiotis, M. Fardis, Y. AlWahedi, V. Tzitzios, S. Stephen, N. Boukos, H.J. Kim, S.M. Alhassan, G. Papavassiliou. Phys. Chem. C. 119 (6), 2015, 3428–3438.

· Influence of decomposition time and H2 pressure on properties of unsupported ammonium tetrathiomolybdate - derived MoS2 catalysts, J. Whelan, I. Banu, G. Luckachan, N. D. Stanciu, S. Stephen, A. Tharalekshmy, S. AlHashimi, R. V. Vladea, M.S. Katsiotis, S. M. Alhassan, Journal of Analytical Science and Technology, 20156:8 DOI: 10.1186/s40543-014-0043-0

· In Situ deposition and Characterization of MoS2 Nano layers on Carbon Nanofibers and

Nanotubes, I. Zafiropoulou, M.S. Katsiotis, N. Boukos, M.A. Karakassides, S. Stephen, V. Tzitzios,

M. Fardis, R. Vladea, S.M. Alhassan, G. Papavassiliou, J. Phys. Chem. C, 117(19), 2013, 10135 - 10142.

· Characterization of H2S gas sensor based on CuFe2O4 nanoparticles , Mohammad Abu Haija, Ayah Abu-Hani, Najwa Hamdan, Samuel Stephen, Journal of Alloys and Compounds 690 · January 2017, DOI: 10.1016/j.jallcom.2016.08.174

· Effects of 2, 5-dimethylfuran addition to diesel on soot nanostructures and reactivity , Bedanta

Gogoi, Abhijeet Raj, Maher Alrefaai, Samuel Stephen, Tharalekshmy Anjana,Vinu Pillai,

Shrinivas Bojanampati, Fuel 159, JFUE-D-15-00788R1 August 2015, DOI: 10.1016/j.fuel.2015.07.038

· Facile In Situ Fabrication of Nanostructured Graphene–CuO Hybrid with Hydrogen Sulfide Removal Capacity, Sunil P. Lonkar,· Vishnu V. Pillai, Samuel Stephen , Ahmed A Abdala, Vikas Mittal, Nano- Micro Lett., March 2016

· Facile synthesis of thermally reduced graphene oxide-sepiolite nanohybrid via intercalation and thermal reduction method, M.R.Vengatesan, S.Singh, S.Stephen, K.Prasanna, C.W.Lee, V.Mittal, Applied Clay Science · September 2016 DOI: 10.1016/j.clay.2016.09.006

· Effects of methyl group on aromatic hydrocarbons on the nanostructures and oxidative reactivity of combustion-generated soot, Gerardo D.J. Guerrero Peña, Mhd Maher Alrefaai, seung yeon Yang, Abhijeet Raj, Joaquin L. Brito, Samuel Stephen, Tharalekshmy Anjana, Vinu Pillai, Combustion and Flame 172:1-12 · October 2016 ,DOI: 10.1016/j.combustflame.2016.06.026

· Identification of selective oxidation of TiC/SiC composite with X-ray diffraction and Raman spectroscopy, Nicoleta Doriana Banu, Ionut Banu, Marios S. Katsiotis, Tharalakshmy Anjana, Samuel Stephen, Jamie Whelan, Gisha Elizabeth Luckachan, Radu Vladea, Saeed M Alhassan, Chemical Papers- Slovak Academy of Sciences 70(11):1503–1511 · November 2016 DOI: 10.1515/chempap-2016-0084

Poster Presentations

· Intercalation of graphene oxide using stabilized cationic benzidine free-radicals, M.S. Katsiotis, D. Gournis, S. Stephen, C. Trapalis, G. Papavassiliou, S.M. Alhassan, D. Petridis, 4th International Conference on Multifunctional, Hybrid and Nanomaterials, Barcelona, Spain, 9/3 – 13/3/2015.

· Facile MoS2 single layer decoration of multi wall carbon nanotubes via thermolytic reduction method, M.S. Katsiotis, V. Tzitzios, I. Zafiropoulou, R. Mishra, S. Stephen, N. Boukos, J.C. Idrobo, S. Pantelides, G. Papavassiliou, S.M. Alhassan, 4th International Conference on Multifunctional, Hybrid and Nanomaterials, Barcelona, Spain, 9/3 – 13/3/2015.

· Synthesis of Y nanozeolites on SiC foam structures : A promising catalyst for cracking applications, Marios Katsiotis, Jamie Whelan, Samuel Stephen, Ionut Banu, Saeed M Alhassan, ADNOC Research and Development Academic Conference 2013, Abu Dhabi.

• Teaching laboratory based courses focused on Inorganic, Organic and Analytical chemistry for yearly batch of 20 students in various cohorts
• Preparing new course materials/folders in line with the curriculum requirements
• Responsible for theory and laboratory based courses.

• Isolation, Chemical Characterization, and fingerprinting of medicinal plant products utilizing techniques such as GC, HPLC, Atomic Absorption Spectrophotometer, UV VIS-NIR, FTIR Spectrometers
• Screening of finished herbal medicinal products for possible adulteration utilizing analytical techniques
• Imparting hands-on training programs for undergraduate students in honing their analytical skills and chemical instrumentation
• Preparation of SOPs.