MPRI Centralised Laboratories Gerrard Peters School of Physics

MPRI Centralised Laboratories Gerrard Peters School of Physics 1

Introduction • Centralised laboratories houses similar pieces of equipment – Better accessibility of equipment to researchers – Provides a wider scope for preparing and analysing materials • MPRI Centralised Laboratories – Thin Films Lab – Furnace Lab – Sample Preparation Lab • Research labs are utilised by : – Physics researchers and post graduate students – Students from other schools and faculties including; • • Chemistry Biology Metallurgical Engineering Mechanical Engineering 2

Thin Films Laboratory • Houses various deposition systems • Can deposit ~100 nm thick layers of most metals (Al, Au, Cr etc, ), and Organic thin film layers: pentacene 3

Thin Films Laboratory PLD (pulsed laser deposition) system • Hard coatings and protective layers - Transition metal Carbides and nitrides B 4 C, Ti. C, Nb. N, RF Sputtering system • Single/Multi metallic layers, nano particles, Ti, Nb, Hf, • diamond like carbon: doped & pristine • Compounds: Oxides- Bi. Fe. O 3, carbides, nitrides, oxynitrides , composite oxides 4

Thin Films Laboratory DC Sputtering system • transparent conducting oxides • reactive sputtering of composite oxides and oxynitrides • Modification: multi-layer thin films Thermal evaporation system • High vapor pressure materials Al, Au, Cr, • Organic thin film layers 5

Thin Films Laboratory I-V (electrical measurement) system • two point and 4 point in air and at 50 K - 325 K • Photoconductive experiments Photovoltaic materials: low cost • Pulse measurements: C-V-t SEM (Scanning Electron Microscope) with EDS attachment • Large chamber (sample size up to 60 mm dia x 40 mm height) • 50 nm resolution (W-filament) • Elemental surface analysis 6

Furnace Laboratory • • • Carbolite tube furnace (max temp. ~1100°C) Carbolite tube furnace(max temp. ~1700°C) Sentro Tech tube furnace – 2 zone (max temp. ~1700°C) RF furnace (max temp. ~1400°C) Drying ovens 7

Sample Preparation Laboratory • • Precision cutting saws Metallographic polishing machines Variety of optical and stereo microscopes Facilities for working with chemicals 8

Sample Preparation Laboratory Low speed diamond saw diamond wire saw 9

Sample Preparation Laboratory Metallographic polisher Optical/stereo microscopes 10

Contact information • For use of the Centralised facilities all initial contact to be made with Prof. Elias Haddad • For more information on the facilities ; • • • Thin Films Laboratory : Dr. Daniel Wamwangi Furnace Laboratory : Gerrard Peters Sample Prep. Laboratory : Gerrard Peters 11