Shape and Size of Highly Concentrated Micelles in CTAB/NaSal Solutions by Small Angle Neutron Scattering (SANS)
Highly concentrated micelles in CTAB/NaSal solutions with a fixed salt/surfactant ratio of 0.6 have been studied using Small Angle Neutron Scattering (SANS) as a function of temperature and concentration. A worm-like chain model analysis of the SANS data using a combination of a cylindrical form fac...
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| Veröffentlicht in: | Langmuir 2012-08, Vol.28 (33), p.11962-11968 |
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| creator | Das, Narayan Ch Cao, Hu Kaiser, Helmut Warren, Garfield T Gladden, Joseph R Sokol, Paul E |
| description | Highly concentrated micelles in CTAB/NaSal solutions with a fixed salt/surfactant ratio of 0.6 have been studied using Small Angle Neutron Scattering (SANS) as a function of temperature and concentration. A worm-like chain model analysis of the SANS data using a combination of a cylindrical form factors for the polydisperse micellar length, circular cross-sectional radius with Gaussian polydispersity, and the structure factor based on a random phase approximation (RPA) suggests that these micelle solutions have a worm-like micellar structure that is independent of the concentration and temperature. The size of the micelle decreases monotonically with increasing temperature and increases with concentration. These observations indicate that large micelles are formed at low temperature and begin to break up to form smaller micelles with increasing temperature. |
| doi_str_mv | 10.1021/la2022598 |
| format | Article |
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A worm-like chain model analysis of the SANS data using a combination of a cylindrical form factors for the polydisperse micellar length, circular cross-sectional radius with Gaussian polydispersity, and the structure factor based on a random phase approximation (RPA) suggests that these micelle solutions have a worm-like micellar structure that is independent of the concentration and temperature. The size of the micelle decreases monotonically with increasing temperature and increases with concentration. These observations indicate that large micelles are formed at low temperature and begin to break up to form smaller micelles with increasing temperature.</description><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Micelles. Thin films</subject><subject>Physical and chemical studies. Granulometry. 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Thin films</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Das, Narayan Ch</creatorcontrib><creatorcontrib>Cao, Hu</creatorcontrib><creatorcontrib>Kaiser, Helmut</creatorcontrib><creatorcontrib>Warren, Garfield T</creatorcontrib><creatorcontrib>Gladden, Joseph R</creatorcontrib><creatorcontrib>Sokol, Paul E</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Langmuir</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Das, Narayan Ch</au><au>Cao, Hu</au><au>Kaiser, Helmut</au><au>Warren, Garfield T</au><au>Gladden, Joseph R</au><au>Sokol, Paul E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Shape and Size of Highly Concentrated Micelles in CTAB/NaSal Solutions by Small Angle Neutron Scattering (SANS)</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2012-08-21</date><risdate>2012</risdate><volume>28</volume><issue>33</issue><spage>11962</spage><epage>11968</epage><pages>11962-11968</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>Highly concentrated micelles in CTAB/NaSal solutions with a fixed salt/surfactant ratio of 0.6 have been studied using Small Angle Neutron Scattering (SANS) as a function of temperature and concentration. 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| source | American Chemical Society Journals |
| subjects | Chemistry Colloidal state and disperse state Exact sciences and technology General and physical chemistry Micelles. Thin films Physical and chemical studies. Granulometry. Electrokinetic phenomena |
| title | Shape and Size of Highly Concentrated Micelles in CTAB/NaSal Solutions by Small Angle Neutron Scattering (SANS) |
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