Patterned and switchable surfaces for biomaterial applications

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Chapter 5 – Surface plasmon resonance imaging of polymer microarraysUpon the cooling of the microarray below the LCST, a gradual decrease in theintensity of the reflected light was observed as the polymer spots swell and take onmore water (Figure 5.3), whereupon exothermic enthalpy is the thermodynamicdriving force for hydrogen bond formation between water molecules and thepolymer’s polar groups. This continued until the SPR signal intensity declined to thebaseline level. Therefore, the change in PNIPAAm morphology was reversible andcould be repeated over three heating and cooling cycles in succession (Figure 5.3).Similar results for PNIPAAm coatings have been observed previously by SPR [276-278].5-172
Andrew Hook – Patterned and switchable surfaces for biomaterial applicationsFigure 5.4. Surface plot of reflectivity taken from an array of PLL spotted onto baregold over a concentration series of 2.0, 1.0, 0.5, 0.25, 0.1, 0.05 and 0.01mg/ml. Each concentration was repeated in triplicate. The angle of incidencewas set such that the bare gold background was in resonance. The intensityof the reflected light is enhanced at the PLL spots from the higherconcentrations due to the displacement of the resonance angle to higherangles as a result of the local increase in the refractive index. Each spot isapproximately 400 m in diameter, with a centre-to-centre distance of 500m.5-173
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Patterned andswitchable surfacesfor
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TABLE OF CONTENTSTABLE OF CONTENTS
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Andrew Hook - Patterned and switcha
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CHAPTER 1.INTRODUCTION1The content
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Chapter 1 - Introductionconsiderabl
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Chapter 1 - Introductioninteraction
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Chapter 1 - IntroductionIn general,
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Chapter 1 - IntroductionFor some ap
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Chapter 1 - Introductionangles rang
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Chapter 1 - Introductionof understa
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Chapter 1 - IntroductionSeveral str
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Chapter 1 - Introductioncues to con
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Chapter 1 - Introductionby controll
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Chapter 1 - Introduction1.2.2. Soft
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Chapter 1 - Introductionsubstrate.
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Chapter 1 - Introduction(A)(B)Figur
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Chapter 1 - Introduction(A)(B)(C)(C
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Chapter 1 - Introductioncomplex gen
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Chapter 1 - Introductionmorphology
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Chapter 1 - Introduction(A)(B)(C)(D
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Chapter 1 - Introductionthe LCST, a
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Chapter 1 - IntroductionHyun et al.
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Chapter 1 - Introductionmicelles. T
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Chapter 1 - Introduction1.4.1. DNA
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Chapter 1 - IntroductionA major pro
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Chapter 1 - Introductionattached to
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Chapter 1 - IntroductionTable 1.1.
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Chapter 1 - Introductionefficiencie
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Chapter 1 - Introductionachieved by
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Chapter 1 - IntroductionTable 1.2.
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Chapter 1 - IntroductionOnce releas
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Chapter 1 - Introductionimaging not
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Chapter 1 - IntroductionA number of
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CHAPTER 2.SPATIALLY CONTROLLED ELEC
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CHAPTER 3.COMPARISON OF THE BINDING
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DNA (mg/m 2 ) DNA (mg/m 2 )Andrew H
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Force (nN)Force (nN)Force (nN)Force
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