Department of Chemical Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli, Taoyuan 32023, Taiwan.
J Colloid Interface Sci. 2010 Oct 1;350(1):75-82. doi: 10.1016/j.jcis.2010.06.011. Epub 2010 Jun 12.
This work reports white-light photoluminescent (PL) silica nanoparticles and their applications of preparation of PL polymer films and nanofibers. Rhodamine B (RhB) physically adsorbs or chemically bonds to silica nanoparticle (SNP) surfaces, resulting in PL SNPs. The RhB-modified SNPs exhibit white-light PL emissions under an excitation at 365nm, which is different from the inherent yellow light emission of RhB. The SNPs with physically-adsorbed RhB show stimuli-responsive properties. In solutions, the RhB molecules which physically adsorb to SNPs release from SNPs, consequently turning the PL emission from white-light to yellow. On the other hand, the SNPs having covalently-bonded-RhB molecules are effective additives for preparation of white-light PL polymer composites. Both PL poly(methylmethacrylate) (PMMA) films (from casting process) and nanofibers (from electrospinning process) showing white-light PL emission have been prepared.
本文报道了白光光致发光（PL）二氧化硅纳米粒子及其在制备 PL 聚合物薄膜和纳米纤维中的应用。罗丹明 B（RhB）物理吸附或化学键合到二氧化硅纳米粒子（SNP）表面，导致 PL SNP 的形成。在 365nm 的激发下，修饰后的 RhB-SNP 表现出白光 PL 发射，这与 RhB 的固有黄光发射不同。具有物理吸附 RhB 的 SNP 表现出刺激响应特性。在溶液中，物理吸附在 SNP 上的 RhB 分子从 SNP 上释放出来，从而使 PL 发射从白光变为黄光。另一方面，具有共价键合-RhB 分子的 SNP 是制备白光 PL 聚合物复合材料的有效添加剂。通过浇铸法制备了具有白光 PL 发射的 PL 聚甲基丙烯酸甲酯（PMMA）薄膜和通过静电纺丝法制备了白光 PL 发射的纳米纤维。
