Dr. Bem


Title/Qualifications: Ph.D
Department/Unit/Section: Physics
Contact Address: Box 1288, Webuye, Kenya.
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Cell phone: 0719 509 182
Position: Lecturer
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Google Scholar: https://scholar.google.com/citations?user=J-HE9uoAAAAJ&hl=en

ORCID: https://orcid.org/0000-0001-5703-2474

Publications

  • Elicah Nafula Wabululu, P.W.O Nyawere Daniel B. Bem First-Principles Calculation of Structural, Electronic and Elastic Properties of tysonite Lanthanum Fluoride (LaF3). Quest Journal of Research in Environmental and Earth Science. vol. 04 No.1, 2018. pp 36-40.
  • P. N. Onkundi1,*, K. M. Munji1, D. B. Bem1and B. Muthoka. Effect of Deposition Parameters on Optical and Electrical Properties of SnO2: Al Thin Films Prepared by Spray Pyrolysis Technique for Optoelectronic Devices. Int. J. Thin. Fil. Sci. Tec. 7, No. 1, (2018). 25-3
  • Elicah N. Wabululu, P. W. O. Nyawere, Daniel B. Bem. Scientific Research Through Simulation in Africa: Role of HPC in Computational Material Studies. International Journal of Materials Science and Applications, 2017; 6(4): 190-192
  • Effect of Deposition Parameters on Optical and Electrical Properties of SnO2:Al Thin Films Prepared by Low Cost Spray Pyrolysis Technique – in preparation
  • Structural and Optical Properties of a Yellow-emitting  Phosphor for Applications in White Light Emitting Devices – in preparation
  • Daniel B. Bem, Hendrick C. Swart, Adriaan S. Luyt and Francis B. Dejene. (2011) “Luminescent properties of long-lasting BaAlxOy:Eu2+,Dy3+ nanocomposites”. Published. In: Journal of Applied Polymer Science. Vol. 121, Issue 1, pp. 243–252, 5 DOI: 10.1002/app.33553. July 2011
  • Daniel B. Bem, A.S. Luytc, B.F. Dejene, H.C. Swart. Temperature dependence of the structural and luminescent properties of long-lasting afterglow SrAlxOy:Eu2+,Dy3+ phosphor. Physica B: Condensed Matter. Volume 407, Issue 10, 15 May 2012, Pages 1556–1560. doi:10.1016/j.physb.2011.09.085
  • F.B. Dejene, D.B. Bem, H.C. Swart. Synthesis and characterization of CaAlxOy:Eu2+ phosphors prepared using  solution-combustion method. Journal of Rare Earths, Vol. 28, 2010, p. 272. DOI: 10.1016/S1002-0721(10)60380-8. 
  • Bem, D.B.; Swart, H.C.; Luyt, A.S.; Coetzee, E.; Dejene, F.B. Properties of Green SrAl2O4 Phosphor in LDPE and PMMA Polymers. Published. In the Journal of Applied Polymer Science, Vol. 117, Issue 5, pp. 2635–2640, (2010). DOI: 10.1002/app.31405. 05-Sep-2010
  • D.B. Bem, A.S. Luyt, F.B. Dejene, J.R. Botha, H.C. Swart. Structural, luminescent and thermal properties of blue SrAl2O4:Eu2+,Dy3+ phosphor filled low-density polyethylene composites. Physica B: Condensed Matter. Volume 404, Issue 22, 1 December 2009, Pages 4504–4508. 
  • doi:10.1016/j.physb.2009.09.050
  • D.B. Bem, H.C. Swart, A.S. Luyt, M.M. Duvenhage, F.B. Dejene. Characterization of Luminescent and Thermal Properties of Long Afterglow SrAlxOy:Eu2+,Dy3+ Phosphor Synthesized by Combustion Method. Published. In the Journal of Polymer Composites. Volume 32, Issue 2, pages 219–226, February 2011 DOI: 10.1002/pc.21036. 
  • D.B. Bem “DC conductivity and Thermoelectric Power of Bromine-doped Polypropylene.” presented at the 1st regional/6th annual general conference of KNAP, Nairobi, 1992. 
  • "The electrical transport properties of bromine-doped polypropylene."-published in the East African Journal of Science, 1996.
  • D.B. Bem "The electrical transport properties of bromine-doped polypropylene."-published in the East African Journal of Science, 1996.
  • D.B. Bem ‘Laser technology in development” - published in Journal of East African Research and Development, 1998.
  • “DC conductivity and Thermoelectric Power of Bromine-doped Polypropylene.” - presented at the 1st regional/6th annual general conference of KNAP, Nairobi, 1992. 

Conferences/ Seminars / Workshops

  1. Departmental(Weekly), Uinversity seminars
  2. Third South African Conference on Photonic Materials, Kariega, South Africa, (June, 2011)
  3. International Conference on Rare Earths, Beijing, China, (2010)
  4. 53rd South African Institute of physics Conference, Durban (June, 2009)
  5. 52nd South African Institute of physics Conference, Polokwane (June, 2008)
  6. 4th International Conference of the African-Materials Research Society, Dar Es Salaam, Tanzania, (December, 2007)
  7. ICTP College on nanotechnology, Capetown, South Africa, (December, 2007)
  8. 51st South African Institute of physics Conference, Johannesburg (June, 2007)
  9. School on Optical Fibre Technology, Port Elizabeth, South Africa (March, 2007)