Background: Nanoporous anodic aluminium oxide (NAAO) prepared by self-ordering
anodization is fascinating and versatile nanostructured material predestined for a variety of applications.
Objective: NAAO possesses remarkable properties with a highly ordered array of cylindrical pores
which can be produced with tunable pore diameters and inter-pore spacing. For the past few decades,
different approaches have been introduced to improve the surface properties of NAAO, however,
though the various approached established, surface modification of NAAO is still a significant
challenge. In this review, we highlight the current state of research on NAAO addresses the
formation, properties and numbers of applications are further demonstrated for the application of
catalytic, biosensing and nanostructure templates synthesis.
Method: We systematically introduce the concept of material fabrication of the NAAO based on
inexpensive electrochemical anodization with the self-ordering process of nanopores and the outcome
of the process are entirely ordered and size-controlled nanopores with distinctive pore geometries.
Also, we described the recent advances approaches such as chemical vapor deposition
(CVD), spin coating, electrodeposition, electroless deposition, impregnation, etc. for structural engineering
of the NAAO with targeting applications.
Results: The combination of unique properties with tunable pore diameter and surface functionality
made these NAAO materials very attractive for a wide range of application such as chemo & biosensors,
catalytic and used as a template in the fabrication of various nanostructured materials such
as nanorods, nanotubes and nanowires.
Conclusion: The present review addresses the formation, properties, surface functionalities and
several applications of NAAO.