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Patterned and switchable surfaces for biomaterial applications

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Andrew Hook – <strong>Patterned</strong> <strong>and</strong> <strong>switchable</strong> <strong>surfaces</strong> <strong>for</strong> <strong>biomaterial</strong> <strong>applications</strong>2.2.1. Substrate preparation....................................................................................... 2-672.2.2. Plasma polymerisation ..................................................................................... 2-672.2.3. Poly(ethylene glycol) grafting .......................................................................... 2-682.2.4. Excimer laser ablation ..................................................................................... 2-682.2.5. X-ray photoelectron spectroscopy..................................................................... 2-702.2.6. Fourier trans<strong>for</strong>m – infrared analysis ............................................................... 2-702.2.7. Plasmid propagation ........................................................................................ 2-702.2.8. DNA adsorption <strong>and</strong> desorption studies ............................................................ 2-712.2.9. Solid phase transfection ................................................................................... 2-732.3. RESULTS AND DISCUSSION ..................................................................................... 2-752.3.1. Characterisation of polymer films .................................................................... 2-752.3.2. DNA adsorption <strong>and</strong> desorption studies ............................................................ 2-822.3.3. Transfection experiments.................................................................................. 2-892.3.4. Formation of a transfected cell microarray....................................................... 2-942.4. CONCLUSION ........................................................................................................ 2-95CHAPTER 3. COMPARISON OF THE BINDING MODE OF PLASMID DNA TOALLYLAMINE PLASMA POLYMER AND POLY(ETHYLENE GLYCOL) SURFACES . 3-973.1. INTRODUCTION ..................................................................................................... 3-973.2. MATERIALS AND METHODS ...................................................................................3-1013.2.1. Substrate preparations ....................................................................................3-1013.2.2. Substrate characterisation ...............................................................................3-1023.2.3. Plasmid preparation .......................................................................................3-1033.2.4. DNA adsorption ..............................................................................................3-1043.2.5. Data analysis ..................................................................................................3-1053.2.6. Electrostimulated DNA adsorption <strong>and</strong> desorption ..........................................3-1063.3. RESULTS AND DISCUSSION ....................................................................................3-1083.3.1. Surface characterisation .................................................................................3-1083.3.2. Comparison of in situ QCM analysis <strong>and</strong> depletion of solution fluorescence ....3-1113.3.3. DNA adsorption. .............................................................................................3-1143.3.4. Electro-stimulated DNA adsorption <strong>and</strong> desorption .........................................3-1253.4. CONCLUSION .......................................................................................................3-127CHAPTER 4. ADVANCED SUBSTRATE FABRICATION FOR CELLMICROARRAYS ................................................................................................ 4-1294.1. INTRODUCTION ....................................................................................................4-1294.2. MATERIALS AND METHODS ...................................................................................4-1344.2.1. Substrate preparation......................................................................................4-1344.2.2. Array <strong>for</strong>mation ..............................................................................................4-1344.2.3. Characterisation of polymer crosslinking ........................................................4-1374.2.4. Cell culture .....................................................................................................4-137II

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