Electrical Maintenance

KEDAR MANANDHAR

**** * **** ***** #* • Chicago, IL60608 • 630-***-**** • *******@*****.***

SUMMARY OF QUALIFICATIONS

• Research experience in GaN MOCVD, organic electronics and catalysis.

• Hands-on experience with operation, repair, maintenance and modification of complex vacuum systems.

• System and analyzing tools expertise – MOCVD, MOMBE, ALD, PVD, MBE, XPS, AES, UV-Vis, HV, STM, AFM, Sputtering, LEED, LEIS, RAIRS, TPD

• Demonstrated track record of meeting project goals.

PROFESSIONAL EXPERIENCE

POSTDOCTORAL ASSOCIATE

UNIVERSITY OF ILLINOIS AT CHICAGO Chicago, IL March 2011 to present

Adviser: Prof. Michael Trenary

Initial stage reactions between ZrB2, a noble substrate, and MOCVD precursors and carrier gas and morphology of products to get insight into the mechanism of GaN growth on ZrB2

• Determined temperature dependent uptake of nitrogen by ZrB2.

• Determined energetically favorable sites for nitrogen, gallium and hydrogen atoms on the ZrB2(0001) surface.

• Determined TMG decomposition pattern.

• Quantified carbon incorporation in ZrB2.

• Determined desorption conditions for hydrogen, gallium, nitrogen and carbon from ZrB2.

UNIVERSITY OF SOUTH CAROLINA Columbia, SC Sept. 2010 to Jan. 2011

Adviser: Prof. Donna A. Chen

Factors impacting catalytic selectivity and reactivity in mono and bimetallic nanocluster-titania systems

• Optimized gold nano clusters’ size to enhance oxidation from methanol to formaldehyde.

• Determined compositional structure of gold-cobalt bimetallic nanocluster for optimal catalytic properties.

COLORADO STATE UNIVERSITY Fort Collins, CO Dec. 2007 to Aug. 2010

UNIVERSITY OF WYOMING Laramie, WY

Adviser: Prof. Bruce A. Parkinson

Study of interfacial electronic structure, a key parameter to determine barrier for a carrier, of metal–polyaromatic hydrocarbon (PAH) (perylene & benz[a]anthracene (BA)) Schottky contacts.

• Calculated interface parameters, which determine change of a carrier barrier height as a function of substrate work function, for perylene-metal and BA-metal Schottky contacts and found that for BA-metal contact, change of metal has less effect in altering carrier injecting voltage.

Study of morphology of perylene and BA films on metal surfaces, one of parameters affecting carrier mobility, electrical conductivity and activation energy for electrical conduction.

• Determined conditions to obtain well packed order layer, morphology favoring improved electrical properties.

TECHNICAL EXPERIENCE

• Over eight years of working experience in multi-probe ultra high vacuum (UHV) systems.

• Home-made gas bottle refill and handle, freez-pump- thaw (FTP) purifying method.

• Maintenance – Maintained UHV system, mechanical and turbo pumps; fixed LEED, ion-sputter gun, ion pump (shorting problem), x-ray gun (arching, filaments, aluminum window, target), energy analyzer (replaced electron multiplier, solved energy shift problems).

• Building and upgrading – Built metal and organic molecule evaporator systems (both e-beam and resistive heating type), sample assembly, gas manifold and gas delivery lines; installed antibubble kit in STM; designed gas dosers; incorporated various systems and components in chamber.

• Trained new lab members and transitioned system operation responsibilities.

Film preparations and methods

• Organic film – on metals and highly pyrolytic graphite by organic molecular beam epitaxy.

• Gold, silver and copper films - on mica and quartz via thermal and electron beam evaporation.

• Metal nano clusters – single and bimetallic nano clusters on titania using thermal and e-beam evaporation.

Films characterization

• Organic–metal interface electronic properties – via scanning tunneling spectroscopy (STS), ultraviolet photoelectron spectroscopy (UPS), x-ray photoelectron spectroscopy (XPS), ultra violet and visible spectroscopy (UV-vis).

• Film morphology – via STM, atomic force microcopy (AFM), UPS, XPS, low energy ion scattering spectroscopy LEIS, low energy electron diffraction (LEED), RAIRS

EDUCATION

PH.D. IN PHYSICS Waco, TX Dec. 2007

BAYLOR UNIVERSITY

Adviser: Prof. Kenneth T. Park

Dissertation: “Heteroepitaxial organic film (Copper Phthalocyanine (CuPc) and Iron Phthalocyanine (FePc))growth on Ag(111) and STM analysis about film growth mechanism, film structure and morphology.”

• Determined parameters to obtain well ordered CuPc and FePc thin films, one of keys to improve interfacial electrical properties in organic thin film-metal conatacts, on the Ag(111) surface.

• Reported a way of tuning molecular packing density in overlayer thin films via change in structure of molecule.

Publications: Published results in respected impact journals. Eleven papers – first authorship in nine.

Presentations: Nine oral presentations in national and international conferences – seven by me.

RESIDENCY – Permanent Resident (Green Card)

Contact this candidate