期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 141, 期 1-3, 页码 128-134出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2010.10.035
关键词
Mesoporous silica nanoparticles; Controlled release; pH responsive
类别
资金
- National Science Foundation (NIRT) [CHE 0511219478]
- Maryland Technology Development Corporation
- SD Nanosciences, Inc.
- NSF MRSEC [DMR 05-20471]
- Graduate Assistance in Areas of National Need (GAANN) Fellowship
- Howard Hughes Medical Institute Undergraduate Science Education
- Maryland Center for Undergraduate Research
Mesoporous silica nanoparticles (MSN) have potential as drug delivery and controlled release devices due to their high surface area and absorption capabilities. The effect of surface charge and pH on the release of the fluorescent dye, rhodamine 6G, from MSN has been studied. Release profiles of rhodamine 6G from bare and amine-coated MSN at pH 5.0 and 7.4 are very different and demonstrate that electrostatic interactions between entrapped rhodamine 6G molecules and the charged surface of the MSN have a significant effect on release kinetics. Release of rhodamine 6G from amine-coated MSN can be fit to a single exponential function, while release from bare MSN can be fit to a double exponential function-indicating that the release of rhodamine 6G from bare MSN is a two-phase process. In addition, it was determined that MSN need to be sonicated in dye solution to maximize their loading capacity. (C) 2010 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据