Waldron Dennis L, Preske Amanda, Zawodny Joseph M, Krauss Todd D, Gupta Mool C
Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA 22904, USA.
Nanotechnology. 2015 Feb 20;26(7):075705. doi: 10.1088/0957-4484/26/7/075705. Epub 2015 Jan 28.
Optical absorption and fluorescence properties of PbSe quantum dots (QDs) in an Angstrom Bond AB9093 epoxy polymer matrix to form a nanocomposite were investigated. To the authors' knowledge, this is the first reported use of AB9093 as a QD matrix material and it was shown to out-perform the more common poly(methyl methacrylate) matrix in terms of preserving the optical properties of the QD, resulting in the first reported quantum yield (QY) for PbSe QDs in a polymer matrix, 26%. The 1-s first excitonic absorption peak of the QDs in a polymer matrix red shifted 65 nm in wavelength compared to QDs in a hexane solution, while the emission peak in the polymer matrix red shifted by 38 nm. The fluorescence QY dropped from 55% in hexane to 26% in the polymer matrix. A time resolved fluorescence study of the QDs showed single exponential lifetimes of 2.34 and 1.34 μs in toluene solution and the polymer matrix respectively.
研究了在埃（Å）键AB9093环氧聚合物基体中形成纳米复合材料的PbSe量子点（QD）的光吸收和荧光特性。据作者所知，这是首次报道将AB9093用作量子点基体材料，并且结果表明，在保留量子点光学特性方面，它比更常见的聚甲基丙烯酸甲酯基体表现更优，从而得到了聚合物基体中PbSe量子点首个报道的量子产率（QY），即26%。与在己烷溶液中的量子点相比，聚合物基体中量子点的1-s第一激子吸收峰波长红移了65 nm，而聚合物基体中的发射峰红移了38 nm。荧光量子产率从己烷中的55%降至聚合物基体中的26%。对量子点的时间分辨荧光研究表明，在甲苯溶液和聚合物基体中，单指数寿命分别为2.34 μs和1.34 μs。
