Epps Research Group
Small Angle X-Ray Scattering (SAXS)
- 2 kW Cu Ka, 1.514 Å
- 3 pinhole collimation
- Linkam THMS600 Stage
- 0.5, 1.3, and 2 m sample-to-detector distances
- Domain spacing range: 5-100 nm
- Motorized sample stage
Ion Conductivity Measurement
- Princeton Applied Research 2273 Galvanostat/Frequency Response Analysis
- 10 µHz to 1 MHz
- <5 pF capacitance
- >1013 impedence
- 1.2 fA resolution
Block Copolymer Synthesis
- Airfree Synthesis Lines
- MBRAUN Unilab glovebox
- SG Water solvent purification columns
- Viscotek Tetra-Detector GPC system
- Refractive Index
- Viscosity
- Right angle light scattering and 7o low angle light scattering
- Photodiode array (190-500 nm)
Block Copolymer Thin Film Preparation & Analysis
- Nikon Eclipse LV100 optical microscope
- diascopic (transmission) and episcopic (reflection) modes
- 5x, 10x, 20x, 50x, and 100x objectives
- 5 megapixel color camera
- polarizer and quarter wave plate
- motorized stage
- scripting available (autofocus, autocapture, stage movement)
- Fischer Scientific Isotemp vacuum ovens
- Jelight ultraviolet ozone cleaner
- Filmetrics interferometer
- Laurell WS-400-6NPP-Lite spin coater
- Thin film polymer flowcoater
- Solvent annealing flow chamber
- nitrogen carrier gas (0-50 mL/min)
- 4'' diameter annealing chamber
Surface Modification
- Vapor deposition chamber
- customizable via teflon insert pieces
- typical chemistry: chlorosilanes on silicon
- typical substrate size: 3 cm wide x 6 cm long (accommodates up to 15 cm long)
- Nitrogen drying stream
Rheology
- ARES G2 rheometer
- forced convention oven (to 600°C)
- torque range: 0.05 µN.m - 200 mN.m (oscillation)
0.1 µN.m - 200 mN.m (steady shear)
- torque resolution: 1 nN.m
- minimum angular displacement: 1 µrad
- angular velocity range: 1x10-6 rad/s to 300 rad/s
- angular frequency range: 1x10-7 rad/s to 628 rad/s
- step change in velocity: 5 ms