Poly Chemical force microscopy

Hillborg, H., N. Tomczak, A. Olah, H. Schonherr, and G.J. Vansco. 2004. Nanoscale hydrophobic recovery A chemical force microscopy study of UV/ozone-treated cross-linked poly(dimethylsiloxane). Langmuir 20 785-794. 

Hillborg, H. Tomczak, N. Olah, A. Schonherr, H. Vancso, G. J., Nanoscale Hydrophobic Recovery A Chemical Force Microscopy Study of UV/ Ozone-Treated Cross-Linked Poly(dimethylsiloxane). Langmuir 2004, 20, 785-794. 

Song, J., Duval, J.F.L., Stuart, M.A.C., Hillborg, H., Gunst, U., Arlinghaus, H.F., Vancso, G.J. (2007) Surface ionization state and nanoscale chemical composition of UV-irradiated poly(dimethylsiloxane) probed by chemical force microscopy, force titration, and electrokinetic measurements. Langmuir, 23,5430-5438. 

FIG. 2 Atomic force microscopy of plasmid DNA at different stages of condensation with polycations. (a) Circular plasmid DNA (b) DNA condensed with poly-L-lysine (PLL, mol. wt. 4 kDa) at a DNA phosphate/lysine ratio of 2 1 (c) DNA condensed with PLL (mol. wt. 10 kDa) at a phos-phate/lysine ratio of 1 2 (d) toroid of DNA condensed with PLL-asialo-orosomucoid conjugate at a phosphate/lysine ratio of 1 6. [(a) and (d) from Ref. 80, copyright 1998 Oxford University Press (b) and (c) reprinted with permission from Ref. 66, copyright 1999 American Chemical Society.]... 

The materials analyzed were blends of polystyrene (PS) and poly(vinyl methyl ether) (PVME) in various ratios. The two components are miscible in all proportions at ambient temperature. The photooxidation mechanisms of the homo-polymers PS and PVME have been studied previously [4,7,8]. PVME has been shown to be much more sensitive to oxidation than PS and the rate of photooxidation of PVME was found to be approximately 10 times higher than that of PS. The photoproducts formed were identified by spectroscopy combined with chemical and physical treatments. The rate of oxidation of each component in the blend has been compared with the oxidation rate of the homopolymers studied separately. Because photooxidative aging induces modifications of the surface aspect of the material, the spectroscopic analysis of the photochemical behavior of the blend has been completed by an analysis of the surface of the samples by atomic force microscopy (AFM). A tentative correlation between the evolution of the roughness measured by AFM and the chemical changes occurring in the PVME-PS samples throughout irradiation is presented. 

Fig. 3.15 Atomic force microscopy images of poly(oxy methylene) with molecular resolution (a) raw data (b) image obtained from Fourier reconstruction. The arrow indicates the polymer chain direction (image size 7x7 nm2 Reproduced with permission from [38]). Copyright 1992. American Chemical Society, (c) AFM height image and (d) corresponding autocorrelation-filtered image acquired on POM crystals obtained by solid state polymerization [39]. Reproduced with permission from [39]. Copyright 1994. The Royal Society of Chemistry...

Figure 9 Poly(ether-urea) block copolymers phase separate after one-dimensional stacking and aggregation into nanofibres, as visualized by atomic force microscopy (AFM) phase images. (Reproduced from Ref. 34. American Chemical Society, 2006.)...

Table 21.7 Characteristics of linear (L) ABC triblocks prepared by living cationic polymerization and of the corresponding cycUc (C) with poly (CEVE) as central block (Reprinted with permission from M. Schappacher and A. Deflieux, Atomic force microscopy imaging and dilute solution properties of cyclic and linear polystyrene combs, Journal of the American Chemical Society, 130, 14684—14689, 2008. 2008 American Chemical Society.)... 

Chen C, Wang J, Woodcock SE, Chen Z. Surface morphology and molecular chemical structure of poly(n-butyl methacrylate)/polystyrene blend studied by atomic force microscopy (AFM) and sum frequency generation (SFG) vibrational spectroscopy. Langmuir 2002 18 1302-9. 

FIGURE 17.15 Direct electrochemical contact between an incoming AFM-SECM probe and the redox Fc heads of nanometer-sized, flexible chains (such as PEG or DNA), end-grafted onto an electrode substrate. The Fc heads are alternatively oxidized at the tip and reduced back at the substrate. For clarity, the tip is not drawn to scale. The chains are pictured in the mushroom conformation. (Adapted with permission from Abbou, J., Anne, A., and Demaille, C., Probing the structure and dynamics of end-grafted flexible polymer chain layers by combined atomic force—Electrochemical microscopy. Cyclic voltammetry within nanometer-thick macromolecular poly(ethylene glycol) layers, J. Am. Chem. Soc., 126,10095-10108, 2004. Copyright 2004 American Chemical Society.)... 

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