Dense Arrays of Uniform Submicron Pores in Silicon and Their Applications

Brodoceanu, D.; Elnathan, Roey; Prieto‐Simón, Beatriz; Delalat, Bahman; Guinan, Taryn; Kroner, Elmar; Voelcker, Nicolas H.; Kraus, Tobias

doi:10.1021/am506891d

Cited by 51 publications

(41 citation statements)

References 61 publications

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“…Plasma etching and gel‐swelling techniques can also be used to vary the pitch and diameter of the pattern, which can then be transferred to the surface via multiple methods, such as ion bombardment or metal‐assisted chemical etching . Depositing different sizes of colloidal nanoparticle onto the same substrate allows for more complex pattern formation, a process which has been used to fabricate arrays of periodically spaced nanowires with two different diameters .…”

Section: Fabrication Techniquesmentioning

confidence: 99%

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High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

et al. 2020

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Materials patterned with high‐aspect‐ratio nanostructures have features on similar length scales to cellular components. These surfaces are an extreme topography on the cellular level and have become useful tools for perturbing and sensing the cellular environment. Motivation comes from the ability of high‐aspect‐ratio nanostructures to deliver cargoes into cells and tissues, access the intracellular environment, and control cell behavior. These structures directly perturb cells' ability to sense and respond to external forces, influencing cell fate, and enabling new mechanistic studies. Through careful design of their nanoscale structure, these systems act as biological metamaterials, eliciting unusual biological responses. While predominantly used to interface eukaryotic cells, there is growing interest in nonanimal and prokaryotic cell interfacing. Both experimental and theoretical studies have attempted to develop a mechanistic understanding for the observed behaviors, predominantly focusing on the cell–nanostructure interface. This review considers how high‐aspect‐ratio nanostructured surfaces are used to both stimulate and sense biological systems.

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Section: Fabrication Techniquesmentioning

confidence: 99%

“…Nanowires, [136,137] nanopillars, [31] nanostructures, [138,139] nanopits/nanopores, [140,141] nanoelectrodes, [28,65,85,142] ≈0.04-0.5 [143] ≤300 (in theory, but in reality individual field size ≈1 × 1) [144] Best resolution Flexible design (no fixed tooling required)…”

Section: Electron-beam Lithographymentioning

confidence: 99%

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

et al. 2020

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“…85 In particular, colloidal monolayers have been used to create porous, graded-index materials with low reflectivity by, for example, plasma etching of colloidal monolayers, 194 inverting the monolayer, 95 or using the monolayer as an etching mask to generate pillars. 166,187,195 To reduce the reflection from the top surface of solar cells, many methods are used to generate porous materials with the proper optical thickness and effective index for optimal transmission. A recent perspective discusses many of these methods.…”

Section: Factors Affecting Optical Applicationsmentioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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Nature evolved a variety of hierarchical structures that produce sophisticated functions. Inspired by these natural materials, colloidal self-assembly provides a convenient way to produce structures from simple building blocks with a variety of complex functions beyond those found in nature. In particular, colloid-based porous materials (CBPM) can be made from a wide variety of materials. The internal structure of CBPM also has several key attributes, namely porosity on a sub-micrometer length scale, interconnectivity of these pores, and a controllable degree of order. The combination of structure and composition allow CBPM to attain properties important for modern applications such as photonic inks, colorimetric sensors, self-cleaning surfaces, water purification systems, or batteries. This review summarizes recent developments in the field of CBPM, including principles for their design, fabrication, and applications, with a particular focus on structural features and materials' properties that enable these applications. We begin with a short introduction to the wide variety of patterns that can be generated by colloidal self-assembly and templating processes. We then discuss different applications of such structures, focusing on optics, wetting, sensing, catalysis, and electrodes. Different fields of applications require different properties, yet the modularity of the assembly process of CBPM provides a high degree of tunability and tailorability in composition and structure. We examine the significance of properties such as structure, composition, and degree of order on the materials' functions and use, as well as trends in and future directions for the development of CBPM.

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“…For comparison, the wings of the hawkmoth, Cephonodes hylas have a reflectance of less than 2% over the range of 200–800 nm . While nature has employed this phenomenon for quite some time, AR coatings have only recently been finding their way into a wide range of modern applications, including: photovoltaic (PV) cells and solar thermal collectors, television screens/monitors, light‐emitting diodes (LEDs), windows, photonic crystals (PCs), biomedical devices, optical biosensors, lenses, lasers, and many other applications, as shown in Figure .…”

Section: Introductionmentioning

confidence: 99%

Transparent Surfaces Inspired by Nature

Motamedi

Warkiani

Taylor

2018

Advanced Optical Materials

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Nature has long inspired scientists and engineers. As one ubiquitous example of this, nature has provided all with several clever methods to absorb, repel, and/or allow both sunlight and water to pass through surfaces. Moth's eyes (highly antireflective) and lotus leaves (highly hydrophobic and self‐cleaning) represent durable natural surfaces which exhibit nearly ideal physical and optical properties. Man‐made transparent surfaces must also be able to cope with water and dust while reaching the maximum possible light transmission for solar collectors, displays, and other optical devices. To explore the link between these – particularly for transparent surfaces – this review puts the physics, progress, and limitations of synthetic materials in context with natural materials. This perspective reveals that there is still much more to learn (and implement) if it is hoped to match the multifunctionality and resilience of natural materials.

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Dense Arrays of Uniform Submicron Pores in Silicon and Their Applications

Cited by 51 publications

References 61 publications

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

A colloidoscope of colloid-based porous materials and their uses

Transparent Surfaces Inspired by Nature

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