<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hatch, Courtney D.</style></author><author><style face="normal" font="default" size="100%">Greenaway, Ann L.</style></author><author><style face="normal" font="default" size="100%">Christie, Matthew J.</style></author><author><style face="normal" font="default" size="100%">Baltrusaitis, Jonas.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Water adsorption constrained Frenkel-Halsey-Hill adsorption activation theory: Montmorillonite and illite.</style></title><secondary-title><style face="normal" font="default" size="100%">Atmospheric Environment</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">dust montmorillonite illite water adsorption activation cloud condensation nuclei</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier Ltd.</style></publisher><volume><style face="normal" font="default" size="100%">87</style></volume><pages><style face="normal" font="default" size="100%">26 - 33</style></pages><isbn><style face="normal" font="default" size="100%">1352-2310</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Fresh mineral aerosol has recently been found to be effective cloud condensation nuclei (CCN) and contribute to the no. of cloud droplets in the atm. due to the effect of water adsorption on CCN activation.  The work described here uses exptl. water adsorption measurements on Na-montmorillonite and illite clay to det. empirical adsorption parameters that can be used in a recently derived theor. framework (Frenkel-Halsey-Hill Activation Theory, FHH-AT) that accounts for the effect of water adsorption on CCN activation.  Upon fitting the Frenkel-Halsey-Hill (FHH) adsorption model to water adsorption measurements, we find FHH adsorption parameters, A and B, to be 98 ± 22 and 1.79 ± 0.11 for montmorillonite and 75 ± 17 and 1.77 ± 0.11 for illite, resp.  The A and B values obtained from water adsorption measurements differ from values reported previously detd. by applying FHH-AT to CCN activation measurements.  Differences in FHH adsorption parameters were attributed to different methods used to obtain them and the hydratable nature of the clays.  FHH adsorption parameters detd. from water adsorption measurements were then used to calc. the crit. super-satn. (s) for CCN activation using FHH-AT.  The relationship between s and the dry particle diam. (D) gave CCN activation curve exponents (x) of -0.61 and -0.64 for montmorillonite and illite, resp.  The x values were slightly lower than reported previously for mineral aerosol.  The lower exponent suggests that the CCN activity of hydratable clays is less sensitive to changes in D and the hygroscopicity parameter exhibits a broader variability with D compared to more sol. aerosols.  Despite the differences in A, B and x, the FHH-AT derived CCN activities of montmorillonite and illite are quite similar to each other and in excellent agreement with exptl. CCN measurements resulting from wet-generated clay aerosol.  This study illustrates that FHH-AT using adsorption parameters constrained by water adsorption is a simple, valid method for predicting CCN activation of fresh clay minerals and provides parameters that can be used in atm. models to study the effect of mineral dust aerosol on cloud formation and climate. [on SciFinder(R)]</style></abstract><notes><style face="normal" font="default" size="100%">CAPLUS AN 2014:435046(Journal; Online Computer File)</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lazauskas, A.</style></author><author><style face="normal" font="default" size="100%">Guobiene, A.</style></author><author><style face="normal" font="default" size="100%">Prosycevas, I.</style></author><author><style face="normal" font="default" size="100%">Baltrusaitis, V.</style></author><author><style face="normal" font="default" size="100%">Grigaliunas, V.</style></author><author><style face="normal" font="default" size="100%">Narmontas, P.</style></author><author><style face="normal" font="default" size="100%">Baltrusaitis, J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Water droplet behavior on superhydrophobic SiO2 nanocomposite films during icing/deicing cycles.</style></title><secondary-title><style face="normal" font="default" size="100%">Materials Characterization</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">silica film interface hydrophobicity water droplet icing deicing</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier</style></publisher><volume><style face="normal" font="default" size="100%">82</style></volume><pages><style face="normal" font="default" size="100%">9 - 16</style></pages><isbn><style face="normal" font="default" size="100%">1044-5803</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">This work investigates water droplet behavior on superhydrophobic (water contact angle value of 162 ± 1°) SiO2 nanocomposite films subjected to repetitive icing/deicing treatments, changes in SiO2 nanocomposite film surface morphol. and their non-wetting characteristics.  During the expt., water droplets on SiO2 nanocomposite film surface are subjected to a series of icing and deicing cycles in a humid (∼ 70% relative humidity) atm. and the resulting morphol. changes are monitored and characterized using at. force microscopy (AFM) and contact angle measurements.  The formation of the frozen or thawed water droplet, with no further shape change, on superhydrophobic SiO2 nanocomposite film, is obtained faster within each cycle as the no. of the icing/deicing cycles increases.  After 10 icing and deicing cycles, the superhydrophobic SiO2 nanocomposite film had a water contact angle value of 146 ± 2° which is effectively non-superhydrophobic.  AFM anal. showed that the superhydrophobic SiO2 nanocomposite film surface area under the water droplet undergoes gradual mech. damage during the repetitive icing/deicing cycles.  We propose a possible mechanism of the morphol. changes to the film surface that take place during the consecutive icing/deicing expts. [on SciFinder(R)]</style></abstract><notes><style face="normal" font="default" size="100%">CAPLUS AN 2013:1032641(Journal; Online Computer File)</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hatch, Courtney D.</style></author><author><style face="normal" font="default" size="100%">Wiese, Jadon S.</style></author><author><style face="normal" font="default" size="100%">Crane, Cameron C.</style></author><author><style face="normal" font="default" size="100%">Harris, Kenneth J.</style></author><author><style face="normal" font="default" size="100%">Kloss, Hannah G.</style></author><author><style face="normal" font="default" size="100%">Baltrusaitis, Jonas.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Water Adsorption on Clay Minerals As a Function of Relative Humidity: Application of BET and Freundlich Adsorption Models.</style></title><secondary-title><style face="normal" font="default" size="100%">Langmuir</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">water adsorption clay mineral humidity</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2012///</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">28</style></volume><pages><style face="normal" font="default" size="100%">1790 - 1803</style></pages><isbn><style face="normal" font="default" size="100%">0743-7463</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Water adsorption on kaolinite, illite, and montmorillonite clays was studied as a function of relative humidity (RH) at room temp. (298 K) using horizontal attenuated total reflectance (HATR) FTIR spectroscopy equipped with a flow cell.  The water content as a function of RH was modeled using the Brunauer, Emmett, and Teller (BET) and Freundlich adsorption isotherm models to provide complementary multilayer adsorption anal. of water uptake on the clays.  A detailed anal. of model fit integrity is reported.  From the BET fit to the exptl. data, the water content on each of the three clays at monolayer (ML) water coverage was detd. and found to agree with previously reported gravimetric data.  However, BET anal. failed to adequately describe adsorption phenomena at RH values &gt;80%, 50%, and 70% RH for kaolinite, illite, and montmorillonite clays, resp.  The Freundlich adsorption model was found to fit the data well over the entire range of RH values studied and revealed two distinct water adsorption regimes.  Data obtained from the Freundlich model showed that montmorillonite has the highest water adsorption strength and highest adsorption capacity at RH values &gt;19% (i.e., above ML water adsorption) relative to the kaolinite and illite clays.  The difference in the obsd. water adsorption behavior between the three clays was attributed to different water uptake mechanisms based on a distribution of available adsorption sites.  Probably different properties drive water adsorption under different adsorption regimes resulting in the broad variability of water uptake mechanisms. [on SciFinder(R)]</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><notes><style face="normal" font="default" size="100%">CAPLUS AN 2011:1640459(Journal; Online Computer File)</style></notes></record></records></xml>