Professor of chemistry
Ministry of education,ethiopia
Total years of experience :11 years, 2 Months
i taught masters and undergraduate students. i was partially responsible for the research work of couple of masters students . i guided students of physical chemistry. i manage laboratories, participate in curriculum development and reviewed M.Sc. projects.
i taught chemistry to undergraduate students . apart from teaching, i was research guide to two MSc students. as part of the job, i used to involve in curriculam development.
i taught MTech and PhD students. i offered courses related to nanoscience to students from varies engineering departments. apart from teaching, i was also involved in evaluating their research projects.
delivering lecturers
grading students
developing curriculum
project proposal writing
During my tenure as a JSPS postdoctoral fellow, I unconventional electronic and magnetic properties of nano-graphite using SQUID, ESR and NEXAFS. The NEXAFS data in combination with magnetic measurements showed that apart from the edge state spins, the oxidation has the capability to introduce additional spins. The oxidation induced spins induced ferromagnetic interactions in the material. The observed magnetization curves were explained with the help of a combination of ferromagnetic and antiferromagnetic internal fields using molecular field coefficient which assume a normal distribution with the mean on the positive side. This is among the few reports on ferromagnetism in carbon materials. I gave an oral presentation about oxidation-induced magnetism in nano-graphite during the first half of the JSPS programme in the annual meeting of Chemical Society of Japan (CSJ) held on March 26, 2012 at Keio University. Another oral presentation was given after the completion of the work about oxidation-induced magnetism in nano-graphite in the annual meeting of Japan Society for molecular Science (JSMolSci) held on September 20, 2012 at University of Tokyo. My work on oxidation-induced magnetism in graphene has been presented in the international conference on intercalation chemistry held in Tohoku, Japan in 2014.
I have worked in National University of Singapore as a postdoctoral fellow and has been involved in the subject on preparation and functionalization of graphene by chemical methods. During the post doc tenure, I was involved in the exfoliation and functionalization of graphene. The functionalized graphene sheets were characterized by spectroscopic and microscopic methods. I have learned about chemical treatment of graphene in Singapore.
developing methods for the trace analysis of pollutants in air and aquatic bodies using gas chromatograph, HPLC, luminescence spectrometer etc
analysis of spice and spice products using instruments such as HPLC, GC, UV-Visible spectrometer etc. piperine in pepper, capsaicin in chilli and curcumin in turmeric etc
My doctoral research involved the microscopic and spectroscopic studies of monolayer protected clusters (MPCs). My research revealed that elimination of the phase transfer reagent coexisting with monolayers in MPCs leads to defect-free alkyl chain. The presence of such ordered all-trans alkyl chain leads to reduction in the mobility of alkyl chains. The reduced mobility observed in the system is explained in terms of the restriction brought about by the interdigitation of alkyl chains (Phys. Rev. B. 75 (2007) 75414). The lower redispersibility and the high propensity towards precipitation changed the common notion that one can prepare redispersible MPcs, free of phase transfer reagent, by repeated purification (J. Chem. Sci., 120 (2008) 547). From the detailed understanding of the structure of MPCs, I understood that the MPCs, due to their high tendency to interdigitate, can be used to probe the mechanism of self assembly in materials with alkyl chains on the periphery. I found gels as interesting systems because the inhibition of crystallization in such systems and formation of cross linked network is due to the presence of alkyl chains. The self assembly of small molecules leading to formation of fibers has received considerable attention. The motivation for such studies includes understanding of the molecular mechanism behind life threatening amyloidosis diseases. I probed the self-assembly of small molecule gelators using MPCs as electron microscopic markers. The study revealed a hierarchical self-assembly in oligo-paraphenylenevinylene molecules through the formation of tapes, ribbons, fibrils and fibers (Chem. Asian J. 4 (2009) 840).
courses: solution chemistry, thermodynamics, quantum chemistry, marine chemistry,organic synthesis, analytical chemistry, water analysis etc
BSc with chemistry as the major subject and maths and physics as the subsidiary subjects