By James D. Batteas, Chris A. Michaels, Gilbert C. Walker
Applications of Scanned Probe Microscopy to Polymers stresses the research of polymer and biopolymer surfaces utilizing the ever-expanding methodologies of scanned probe microscopies. This booklet contains reviews of optical homes by way of near-field methodologies, neighborhood mechanical houses of polymer motion pictures via AFM, the dynamics and mechanics of unmarried molecules probed through AFM, and methodologies for more advantageous imaging modes. a main concentration of this ebook is the quantitative dimension of floor houses via scanned probe concepts, which illustrates how the sphere has advanced and what new demanding situations lie forward. purposes of Scanned Probe Microscopy to Polymers might be invaluable to scholars and pros searching for reviews that illustrate what different types of polymer fabric homes might be probed via scanned probe microscopies.
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Extra info for Applications of Scanned Probe Microscopy to Polymers
The buildup and decay of these double layers modifies the local electric field within the droplet in time, causing an additional change in the liquid crystal orientation state. Changes in liquid crystal orientation are detected optically, by monitoring the field-modulated birefringence of the liquid crystal. This is accomplished experimentally by measuring the intensity of 633 nm light transmitted through the sample under cross-polarization conditions. A modulated optical signal results, for which the amplitude and phase characteristics are strongly dependent on the local concentration of ions and the viscoelastic properties of the droplet (19).
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The respective roles of the real and imaginary parts of the refractive index and their impact both on the measured spectra and attempts to extract chemical information from the images is not yet fully understood. This is particularly important in the vicinity of strong absorbance resonances where the real part of the refractive index can change dramatically over narrow frequency regions, as described by the Kramers-Kronig relations. This might lead to band shifting effects, raising the question of what the expected correlation is between far and near-field infrared spectra, with obvious ramifications for the assignment of near-field spectra.