期刊
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
卷 55, 期 1, 页码 107-113出版社
ELSEVIER
DOI: 10.1016/S0939-6411(02)00123-6
关键词
calixarene; solid lipid nanoparticles; atomic force microscopy; photon correlation spectroscopy; gel; carbopol; hyaluronic acid; xanthan
Contact mode atomic force microscopy has been carried out on gels of four current polymers, carbopol 980, carbopol 2020, hyaluronic acid and xanthan containing dispersions of solid lipid nanoparticles (SLNs) of amphiphilic calixarenes. Imaging shows that the SLNs are dispersed within the gels as discrete particles of 150 nm in diameter and show little or no aggregation. The simultaneous use of lateral force, topographic and force modulation mode imaging allows a clear interpretation of the observed images, showing the presence of nanoparticles in the sub-surface region and that the SLNs affect the local mechanical properties of the gels. Photon correlation spectroscopy similarly demonstrates a lack of interaction in suspensions. (C) 2002 Elsevier Science B.V. All rights reserved.
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