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Versatile gradients of chemistry, bound ligands and nanoparticles on alumina nanopore arrays

机译：氧化铝纳米孔阵列上化学，结合的配体和纳米粒子的多功能梯度

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摘要

Nanoporous alumina (PA) arrays produced by self-ordering growth, using electrochemical anodization, have been extensively explored for potential applications based upon the unique thermal, mechanical and structural properties, and high surface-to-volume ratio of these materials. However, the potential applications and functionality of these materials may be further extended by molecular-level engineering of the surface of the pore rims. In this paper we present a method for the generation of chemical gradients on the surface of PA arrays based upon plasma co-polymerization of two monomers. We further extend these chemical gradients, which are also gradients of surface charge, to those of bound ligands and number density gradients of nanoparticles. The latter represent a highly exotic new class of materials, comprising aligned PA, capped by gold nanoparticles around the rim of the pores. Gradients of chemistry, ligands and nanoparticles generated by our method retain the porous structure of the substrate, which is important in applications that take advantage of the inherent properties of these materials. This method can be readily extended to other porous materials.
机译：基于这些材料独特的热，机械和结构特性以及这些材料的高表面积/体积比，使用电化学阳极氧化通过自定序生长生产的纳米多孔氧化铝（PA）阵列已被广泛研究以用于潜在应用。但是，这些材料的潜在应用和功能可以通过孔隙边缘表面的分子水平工程来进一步扩展。在本文中，我们介绍了一种基于两种单体的等离子体共聚在PA阵列表面生成化学梯度的方法。我们进一步将这些化学梯度（也是表面电荷的梯度）扩展到结合的配体的化学梯度和纳米粒子的数密度梯度。后者代表了一种新奇的新型材料，包括对齐的PA，并被孔边缘周围的金纳米粒子覆盖。通过我们的方法生成的化学梯度，配体和纳米颗粒保留了基材的多孔结构，这在利用这些材料固有特性的应用中很重要。该方法可以容易地扩展到其他多孔材料。

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