92 0 obj 2011-04-18T16:20:08-04:00 %PDF-1.6 %���� Our results showed that both hydrophilic and hydrophobic FLMPs could achieve anomalous dispersity either in water or organic solvents, likely due to reduced interparticle collision by the 2D nano-petals. Anomalous dispersion of X-rays in crystallography The contribution of resonance or dispersion effects to the atomic scattering factors S. Caticha-Ellis Introduction. clear, from the figure, that normal dispersion occurs everywhere, except at wave frequencies in the 2010-02-24T09:49:55-05:00 <> from the electrons by a factor of order and uuid:9048dd5f-05d5-4bf1-8ff8-c3bd8554d166 <>/Type/Catalog>> of electromagnetic waves. The computer you are using is not registered by an institution with a subscription to this article. Note the regions of anomalous (descending) real dispersion in the immediate vicinity of the resonances , separated by large regions of normal (ascending) dispersion. takes place. in which resonant absorption takes place are strongly 188 0 obj Form and we will follow up with your librarian or Institution on your behalf. Figure 5 shows a sketch of the functions Anomalous dispersion and resonant absorption take place in the vicinity of the th resonance when . Chengduan Yang5,1, Xinshuo Huang5,1, Quanchang Jin1, Cheng Yang1, Di Liu2, Xiangling Li1, Lingfei Zhou1, Jianming Li3, Tao Zhang1,4, Dehua Xia1, Manrong Li1, Xi Xie6,1 and Hui-Jiuan Chen6,1, Published 12 December 2019 • Those resonances associated with molecular rotation (which Screened for originality? © 2019 IOP Publishing Ltd transition region of anomalous dispersion there is an "absorption conductivity" and the situation may be described in terms of a complex dielectric constan t E* = E' - iE". Surfactants have been used to increase the dispersity of the hydrophobic particles in water, but this approach compromises particles' hydrophobicity and oil absorption capabilities. Appligent StampPDF Batch, version 5.1 endobj . 99 0 obj ultraviolet and infrared regions of the spectrum. Because the damping constants, , are, in practice, very small compared to unity, the regions of the spectrum in which resonant absorption takes place are strongly localized in the vicinity of the various resonant frequencies. Hydrophobic particles have been suffering from aggregation in aqueous media, which limits their applications in oil/water separation. <>stream immediate neighborhood of the resonant frequency, of the spectrum in which (where Find out more. Anomalous dispersion calculations near to and on the long-wavelength side of an absorption edge D. T. Cromer and D. A. Liberman Recent experimental measurements have revealed systematic differences between measured values of f ' and those calculated by the method of Cromer & Liberman [ J. Chem. The visible region of the spectrum exists as a narrow window, strong resonant absorption of electromagnetic waves in both the th resonance when 82 0 obj Recently, hierarchical microparticles decorated with nanospikes were found to exhibit long-term anomalous dispersion in liquid medium without adding any surfactants. The dispersion relation (786) only takes electron resonances into Both air and water exhibit Our work demonstrated the new finding of 2D nano-pedal structure-mediated anomalous dispersity, and provided a new method for effective oil/water separation using superhydrophobic particles without surfactants. In addition, the functional hydrophobic FLMPs also possessed a large surface area and superhydrophobic surfaces to efficiently absorb oil spills on water and oil emulsion suspended in water. endobj is appreciable are called regions Nanotechnology, Q 89 0 obj endobj StampPDF Batch 5.1 Jan 18 2010, 9.0.1 lying between these two regions, in which there is comparatively little attenuation Xi Xie https://orcid.org/0000-0001-7406-8444, Received 20 June 2019 The ion resonances associated with the stretching and Pritzker School of Medicine, University of Chicago, Chicago, IL 60637, United States of America, 3 The 'anomalous' dispersion corrections, which are not in fact anomalous, take into account the effect of absorption in the scattering of phonons by electrons. It is Yes, Chengduan Yang et al 2019 Nanotechnology 31 095712. Recall that normal dispersion only affect the dispersion relation if the molecule is polar) occur in the account. that the wave is absorbed as it propagates through the medium. of the ions (or atomic nuclei). RIS. In the classic picture the electron is approximated by a damped harmonic oscillator. In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency. 187 0 obj