V Lakshmi, Raju Annu, V G Resmi, Pancrecious Jerin K, T P D Rajan, C Pavithran
Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Council of Scientific and Industrial Research (CSIR), Thiruvananthapuram 695019, India.
Phys Chem Chem Phys. 2016 Mar 14;18(10):7367-73. doi: 10.1039/c6cp00012f. Epub 2016 Feb 22.
We report the formation of breath-figure (BF) patterns with amino-functionalized cavities in a BF incompatible polystyrene (PS) by incorporating functionalized alumina nanoparticles. The particles were amphiphilic-modified and the modifier ratio was regulated to achieve a specific hydrophobic/hydrophilic balance of the particles. The influence of the physical and chemical properties of the particles like particle concentration, the hydrophobic/hydrophilic balance, etc., on particle dispersion in solvents having different polarity and the corresponding changes in the BF patterns have been studied. The amphiphilic-modified alumina particles could successfully assist the BF mechanism, generating uniform patterns in polystyrene films with the cavity walls decorated with the functionalized alumina particles, even from water-miscible solvents like THF. The possibility of fabricating free-standing micropatterned films by casting and drying the suspension under ambient conditions was also demonstrated. The present method opens up a simple route for producing functionalized BF cavities, which can be post-modified by a chemical route for various biological applications.
我们报道了通过掺入功能化氧化铝纳米颗粒，在与呼吸图不相容的聚苯乙烯（PS）中形成具有氨基功能化空腔的呼吸图（BF）图案。对颗粒进行两亲性改性，并调节改性剂比例以实现颗粒特定的疏水/亲水平衡。研究了颗粒的物理和化学性质，如颗粒浓度、疏水/亲水平衡等，对颗粒在不同极性溶剂中分散的影响以及BF图案的相应变化。两亲性改性的氧化铝颗粒能够成功辅助BF机制，即使在与水混溶的溶剂（如四氢呋喃）中，也能在聚苯乙烯薄膜中产生均匀的图案，且空腔壁上装饰有功能化氧化铝颗粒。还展示了在环境条件下通过浇铸和干燥悬浮液制备独立微图案薄膜的可能性。本方法为制备功能化BF空腔开辟了一条简单途径，其可通过化学途径进行后修饰以用于各种生物应用。
