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2015 | Buch

Research Background and Motivation Kapitel lesen Erstes Kapitel lesen

Electro-Chemo-Mechanics of Anodic Porous Alumina Nano-Honeycombs: Self-Ordered Growth and Actuation

verfasst von: Chuan Cheng

Verlag: Springer Berlin Heidelberg

Buchreihe : Springer Theses

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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Über dieses Buch

In this thesis, real-time evolution of the nanopore channel growth and self-ordering process in anodic nanoporous alumina are simulated on the basis of an established kinetics model. The simulation results were in accordance with the experiments on the (i) growth sustainability of pore channels guided by pre-patterns; and (ii) substrate grain orientation dependence on self-ordering. In addition, a new fabrication method for the rapid synthesis of highly self-ordered nanoporous alumina is established, based on a systematic search for the self-ordering conditions in experiments. Lastly, it reports on a novel surface-charge induced strain in nanoporous alumina-aluminium foils, which indicates that nanoporous alumina can be used as a new type of actuating material in micro-actuator applications.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Research Background and Motivation
Abstract
Anodic porous alumina which exhibits a characteristic nano-honeycomb structure has received increasing attention both experimentally and theoretically.
Chuan Cheng

Modelling, Numerical Simulation, and Experimental Verification of Self-ordering in Anodic Porous Alumina

Frontmatter
Chapter 2. Establishment of a Kinetics Model
Abstract
In this chapter, a kinetics model for pore channel growth in anodic porous alumina during anodization is established based on the Laplacian electric potential distribution within the oxide and a continuity equation for current density within the oxide body
Chuan Cheng
Chapter 3. Numerical Simulation Based on the Established Kinetics Model
Abstract
In this chapter [1], real-time numerical simulation of two-dimensional (2-D) cross section of pore channel growth in anodic porous alumina is simulated by numerically solving the established kinetics model in Chap. 2.
Chuan Cheng
Chapter 4. Experimental Verification I: Growth Sustainability of Nanopore Channels Guided with Pre-patterns
Abstract
As mentioned in Chap. 1, although anodic porous alumina has been widely used as templates for fabricating various nanostructured materials, the self-organization mechanism of anodic porous alumina during the growth of nanopore channels, which finally determines the self-ordering quality of the in-plane porous patterns have been under debate for decades.
Chuan Cheng
Chapter 5. Experimental Verification II: Substrate Grain Orientation-Dependent Self-ordering
Abstract
As stated in Chap. 1, recent experiments by Ng and Ngan [1‐3], Beck et al. [4, 5], and Napolskii et al. [6, 7] have indicated a strong influence of the substrate grain orientation on the self-ordering in anodic porous alumina. Anodic porous alumina with straight pore channels grown in a stable, self-ordered manner is formed on (001) oriented Al grains, while disordered porous pattern is formed on (101) oriented Al grains with branched pore channels growing in an unstable manner [1].
Chuan Cheng

Fabrication of Highly Self-ordered Anodic Porous Alumina

Frontmatter
Chapter 6. Quantitative Evaluation of Self-ordering in Anodic Porous Alumina
Abstract
An important requirement for anodic porous alumina to be used as a template in synthesis of other nanomaterials, is that the in-plane arrangement of the nanopore channels should be self-ordered, because the self-ordered pattern corresponds to the growth of straight pore channels from top to bottom.
Chuan Cheng
Chapter 7. Fast Fabrication of Self-ordered Anodic Porous Alumina on Oriented Aluminum Grains
Abstract
As mentioned in Chap. 1, under the conventional mild anodization (MA) condition, self-ordered anodic porous alumina is obtained only under certain narrow processing windows with specific values of the interpore distance (D int).
Chuan Cheng

Electro-Chemo-Mechanical Actuations of Anodic Porous Alumina

Frontmatter
Chapter 8. Charge-Induced Reversible Bending in Anodic Porous Alumina–Aluminum Composites
Abstract
Electrical energy can be transformed into mechanical energy in materials such as piezoelectric ceramics, electrostrictive polymers, and carbon nanotubes, because the dimensions of these materials can reversibly expand or contract upon cyclic electrical charging. Recently, charge-induced reversible straining was also observed in nanoporous noble metals, such as Pt, Au, and Au–Pt alloys, which are becoming a promising type of electrochemical actuators for potential applications such as artificial muscles.
Chuan Cheng
Chapter 9. Chemomechanical Softening During In Situ Nanoindentation of Anodic Porous Alumina with Anodization Processing
Abstract
Plenty of previous investigations mainly focused on using anodic porous alumina as templates for synthesis of other nanomaterials, but less efforts have been made on the mechanical behavior of anodic porous alumina which is also interesting and important.
Chuan Cheng
Chapter 10. Conclusions and Future Work
Abstract
Anodic porous alumina has been continuously investigated both theoretically and experimentally since 1940s or even before.
Chuan Cheng
Backmatter
Metadaten
Titel
Electro-Chemo-Mechanics of Anodic Porous Alumina Nano-Honeycombs: Self-Ordered Growth and Actuation
verfasst von
Chuan Cheng
Copyright-Jahr
2015
Verlag
Springer Berlin Heidelberg
Electronic ISBN
978-3-662-47268-2
Print ISBN
978-3-662-47267-5
DOI
https://doi.org/10.1007/978-3-662-47268-2

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