Nanoporous anodic aluminum oxide for chemical sensing and biosensors

Santos, Abel; Kumeria, Tushar; Lošić, Dušan

doi:10.1016/j.trac.2012.11.007

Cited by 211 publications

(159 citation statements)

References 90 publications

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“…[29][30][31][32][33][34][35][36][37][38][39] The development of optical platforms based on NAA has spread the use of this nanomaterial, typically used as a nanoporous template to grow other nanostructures such as nanowires and nanotubes 15 , towards more relevant applications such as optical sensing systems, drug delivery chips and photonic tags. [40][41][42][43][44][45][46][47][48][49][50][51] In this study, we present an innovative and rationally designed pulse anodisation approach, so called pseudo-stepwise pulse anodisation (PSPA), which enables the fabrication of nanoporous anodic alumina optical bandpass filters (NAABPFs) with advanced optical properties (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Rational engineering of nanoporous anodic alumina optical bandpass filters

et al. 2016

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Herein, we present a rationally designed advanced nanofabrication approach aiming at producing a new type of optical bandpass filters based on nanoporous anodic alumina photonic crystals. The photonic stop band of nanoporous anodic alumina (NAA) is engineered in depth by means of a pseudo-stepwise pulse anodisation (PSPA) approach consisting in pseudostepwise asymmetric current density pulses. This nanofabrication method makes it possible to tune the transmission bands of NAA at specific wavelengths and bandwidths, which can be broadly modified across the UV-visible-NIR spectrum through the anodisation period (i.e. time between consecutive pulses). First, we establish the effect of the anodisation period as a means of tuning the position and width of the transmission bands of NAA across the UV -visible-NIR spectrum. To this end, a set of nanoporous anodic alumina bandpass filters (NAA-BPFs) are produced with different anodisation periods, ranging from 500 to 1200 s, and their optical properties (i.e. characteristic transmission bands and interferometric colours) are systematically assessed. Then, we demonstrate that the rational combination of stacked NAABPFs consisting of layers of NAA produced with different PSPA periods can be readily used to create a set of unique and highly selective optical bandpass filters with characteristic transmission bands, the position, width and number of which can be precisely engineered by this rational anodisation approach. Finally, as a proof-of-concept, we demonstrate that the superposition of stacked NAA-BPFs produced with slight modifications of the anodisation period enables the fabrication of NAA-BPFs with unprecedented broad transmission bands across the UV-visible-NIR spectrum. The results obtained from our study constitute the first comprehensive rationale towards advanced NAA-BPFs with fully controllable photonic properties. These photonic crystal structures could become a promising alternative to traditional optical bandpass filters based on glass and plastic.

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Section: Introductionmentioning

confidence: 99%

Rational engineering of nanoporous anodic alumina optical bandpass filters

et al. 2016

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“…The system incorporated MUA-gold-AAO as the immobilising matrix for the antibody (C-reactive protein-CRP), detection and the immunosensor showed high sensitivity over a wide concentration range and enabled a selective immunoassay to be performed. See [10] for more detailed discussion on preparative issues of AAO for chemo and biosensing applications. As the chemistry of AAO surfaces continues to advance, it is expected that additional methods for the preparation of stable monolayers will be realized, contributing further to the technological development of AAO and to a complete understanding of its fundamental and properties.…”

Section: Self Assembly Monolayersmentioning

confidence: 99%

Soft and Hard Surface Manipulation of Nanoporous Anodic Aluminum Oxide (AAO)

et al. 2015

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Nanoporous materials with straight channels have attracted considerable interest due to their unique physical properties and many potential applications such as separation, sensing, biomedical and electronics. For the last few decades, nanoporous alumina or anodic aluminium oxide (AAO) membrane is gaining attention due to its broad applicability in various applications. The unique properties of AAO membrane coupled with tunable surface modification and properties is playing an increasingly important platform in a diverse range of applications such as separation, energy storage, drug delivery and template synthesis, as well as biosensing, tissue engineering and catalytic studies. This chapter aims to introduce the recent advances and challenges for surface manipulation of AAO following the 'soft' and 'hard' modification strategies. The functions of these modified nanostructures materials and latest important applications are evaluated with respect to improved performance and possible implications of those strategies for the future trends of surface engineering are discussed.

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“…Most of the works related with the optical properties of porous anodic aluminum oxide consider the material as an effective medium to model its interaction with light propagating in the porous matrix [27][28][29][30][31][32]. The nanopore size and interpore distance are usually much smaller than the wavelength of visible light, thus, the different effective-medium approximations (EMA) can be considered (Bruggeman, Lorentz-Lorenz [33][34][35][36][37]).…”

Section: Porous Anodic Aluminum Oxide As An Effective Mediummentioning

confidence: 99%

Optical Properties of Nanoporous Anodic Alumina and Derived Applications

et al. 2015

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Inexpensive formation of periodically ordered structures with periodicities and feature sizes lower than 100 nm has triggered a vast amount or research in recent years. Of particular interest in nanotechnology is the nanoporous alumina, which can be produced with a self-organized arrangement of pores in the adequate anodization conditions. Most of the interest of this material is based in its outstanding physical and chemical and properties, and more specifically in its optical properties. The interaction of light with the nanostructured porous alumina gives rise to a wealth of optical properties that have their interest both in research level and also in application. In this work we aim at giving an extensive review of the published research on the optical properties of nanoporous alumina. The review will account for the different studied optical properties of this material such as the existence of a photonic stop band originated from its quasi-random nanostructure, the interferometric and light guiding properties that can be applied to biosensing, the structure nanoengineering to achieve more complex photonic behaviour such as distributed-Bragg reflectors or rugate filters, and the photoluminescence properties. In a second part, a summary of the different applications proposed on the basis of these properties, such as in biotechnology or energy will be given. IntroductionAmong the different features and properties of porous anodic alumina (p-AAO), its optical properties are of special interest and have been the subject of very intensive research. The interaction of light with p-AAO can be analyzed from different points of view: the material interaction, the porous structure interaction or the relation of geometrical features of the nanostructure (periodicity or quasi-periodicity, distance

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Nanoporous anodic aluminum oxide for chemical sensing and biosensors

Cited by 211 publications

References 90 publications

Rational engineering of nanoporous anodic alumina optical bandpass filters

Rational engineering of nanoporous anodic alumina optical bandpass filters

Soft and Hard Surface Manipulation of Nanoporous Anodic Aluminum Oxide (AAO)

Optical Properties of Nanoporous Anodic Alumina and Derived Applications

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