Exploration and Optical Assessment of Mesostable Mesoscopic Structure

激光处理悬浮在劣质溶剂中的微滴，在不损害光学性能的情况下成功地制备了有机染料聚合物纳米颗粒，直径在50 nm到500 nm之间具有可靠的选择。由此产生的单分散纳米颗粒悬浮液可用作材料墨水，通过新兴的印刷技术在固体或柔性衬底上绘制像素图案，具有潜在的超薄平板显示器应用前景。带有疏水侧链的聚荧烯没有表现出能级变化，而带有极性侧链的MEHPPV在光吸收和光电子发射方面都表现出蓝移，这与纳米颗粒的直径无关，这排除了纳米颗粒中激子量子力学限制的可能来源。这种对微滴进行非破坏性可见光激光处理的方法是一种很有前途的方法，可以有效地生产光学响应性完好的染料聚合物纳米颗粒。

Laser processing of microdroplets suspended in poor solvent has successfully produced nanoparticles of organic dye polymer without damage to optical properties, with reliable selection of 50nm through 500nm diameter. Resulting monodispersed nanoparticle suspension is useful as material ink to draw pixel patterns on solid or flexible substrates via emerging printing technology for prospective ultrathin flat panel display application.Polyfluorene, with hydrophobic sidechain, did not show energy level change, whereas MEHPPV, with polar sidechain, exhibited blueshift both in photoabsorption and photoemission, not depending on the nanoparticle diameter, which excludes the possible origin of exciton quantum mechanical confinement within nanoparticles. This nondestructive visible laser processing of microdroplets is a promising method to efficiently produce dye polymer nanoparticles with optical responsiveness intact.