Liu Xiaokong, Zhou Lu, Geng Wei, Sun Junqi
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China.
Langmuir. 2008 Nov 18;24(22):12986-9. doi: 10.1021/la802674h. Epub 2008 Oct 18.
Noncharged pyrene molecules were incorporated into multilayer films by first loading pyrene into poly(acrylic acid) (PAA)-stabilized cetyltrimethylammonium bromide (CTAB) micelles (noted as PAA&(Py@CTAB)) and then layer-by-layer (LbL) assembled with poly(diallyldimethylammonium chloride) (PDDA). The stable incorporation of pyrene into multilayer films was confirmed by quartz crystal microbalance (QCM) measurements and UV-vis absorption spectroscopy. The resultant PAA&(Py@CTAB)/PDDA multilayer films show an exponential growth behavior because of the increased surface roughness with increasing number of film deposition cycles. The present study will open a general and cost-effective avenue for the incorporation of noncharged species, such as organic molecules, nanoparticles, and so forth, into LbL-assembled multilayer films by using polyelectrolyte-stabilized surfactant micelles as carriers.
首先将芘负载到由聚丙烯酸（PAA）稳定的十六烷基三甲基溴化铵（CTAB）胶束中（记为PAA&(Py@CTAB)），然后与聚二烯丙基二甲基氯化铵（PDDA）进行逐层（LbL）组装，从而将不带电荷的芘分子引入多层膜中。通过石英晶体微天平（QCM）测量和紫外可见吸收光谱证实了芘在多层膜中的稳定掺入。由于随着膜沉积循环次数的增加表面粗糙度增大，所得的PAA&(Py@CTAB)/PDDA多层膜呈现指数生长行为。本研究将为通过使用聚电解质稳定的表面活性剂胶束作为载体，将不带电荷的物质（如有机分子、纳米颗粒等）掺入LbL组装的多层膜中开辟一条通用且经济高效的途径。
