
<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jassby, D.</style></author><author><style face="normal" font="default" size="100%">Chae, S. R.</style></author><author><style face="normal" font="default" size="100%">Hendren, Z.</style></author><author><style face="normal" font="default" size="100%">Wiesner, M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Membrane filtration of fullerene nanoparticle suspensions: Effects of derivatization, pressure, electrolyte species and concentration</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Colloid and Interface Science</style></secondary-title><alt-title><style face="normal" font="default" size="100%">J. Colloid Interface Sci.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">AGGREGATION</style></keyword><keyword><style  face="normal" font="default" size="100%">aqueous suspensions</style></keyword><keyword><style  face="normal" font="default" size="100%">c-60</style></keyword><keyword><style  face="normal" font="default" size="100%">films</style></keyword><keyword><style  face="normal" font="default" size="100%">Fullerene</style></keyword><keyword><style  face="normal" font="default" size="100%">Fullerol</style></keyword><keyword><style  face="normal" font="default" size="100%">Ionic bridging</style></keyword><keyword><style  face="normal" font="default" size="100%">NANOMATERIALS</style></keyword><keyword><style  face="normal" font="default" size="100%">Stability</style></keyword><keyword><style  face="normal" font="default" size="100%">Transmembrane pressure</style></keyword><keyword><style  face="normal" font="default" size="100%">WATER</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jun</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://000277482200003</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">346</style></volume><pages><style face="normal" font="default" size="100%">296-302</style></pages><isbn><style face="normal" font="default" size="100%">0021-9797</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">Particle aggregation is induced in derivatized fullerene (fullerol) suspensions by introducing different counter-ion species (Na+ Ca2+ and Mg2+) and concentrations. The suspensions are filtered through 20 nm ceramic membranes under different transmembrane pressures, and the removal efficiency is compared. In all cases, the average hydrodynamic radius far exceeded the average pore diameter of the membrane. In the case of mono-valent counter-ions, removal efficiency is influenced by transmembrane pressure, with higher removal efficiencies achieved at lower pressures. In contrast, removal efficiencies of fullerol suspensions destabilized with di-valent ions are insensitive to transmembrane pressure, similar to what was found in the case of non-derivatized fullerene. Scanning Electron Microscope (SEM) images of post-filtration membranes indicate that fullerol aggregates destabilized with Mg2+ ions deform and partially penetrate the membrane, but are ultimately trapped. The proposed mechanism suggests that di-valent ions act as bridges between fullerol aggregates, forming strong bonds that were not broken under the experimental conditions. These strong bonds may allow aggregated fullerol particles to deform under high pressure, and partially penetrate the membrane. Mono-valent ions are incapable of functioning as bridges, and subsequently, when sufficient pressure is applied, fullerol aggregates will break apart and pass through the membrane. (C) 2010 Elsevier Inc. All rights reserved.</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><accession-num><style face="normal" font="default" size="100%">ISI:000277482200003</style></accession-num><notes><style face="normal" font="default" size="100%">ISI Document Delivery No.: 593SYTimes Cited: 0Cited Reference Count: 28Jassby, David Chae, So-Ryong Hendren, Zachary Wiesner, MarkCenter for the Environmental Implications of Nanotechnology ; National Science Foundation ; US Environmental Protection AgencyFinancial support for this work was provided by the Center for the Environmental Implications of Nanotechnology, and is greatly appreciated. The National Science Foundation and the US Environmental Protection Agency jointly fund the Center for the Environmental Implications of Nanotechnology.Academic press inc elsevier scienceSan diego</style></notes><auth-address><style face="normal" font="default" size="100%">[Jassby, David; Chae, So-Ryong; Hendren, Zachary; Wiesner, Mark] Duke Univ, Pratt Sch Engn, Dept Civil &amp; Environm Engn, Durham, NC 27708 USA.Wiesner, M, Duke Univ, Pratt Sch Engn, Dept Civil &amp; Environm Engn, Durham, NC 27708 USA.wiesner@duke.edu</style></auth-address></record></records></xml>