The use of FIB for the preparation of a structure analogous to the natural sur-face and its replication by selected types of polymers

Kroisová, Dora; Šamořil, Tomáš; Dvořáčková, Štěpánka

doi:10.21062/mft.2021.008

Cited by 3 publications

(8 citation statements)

References 8 publications

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“…Using the CAD model and the chosen parallel machining strategy, tool paths, traverse distances, safety distances, tool passes, and cutting conditions were precisely defined. For the subsequent replication of the specimens, the negative of the selected relief was first created and machined to produce a positive microstructure using the replication process [5,9,10]. The dimensions of the relief were adjusted to suit the needs of the micro-milling technology, depending on the geometry of the selected cutting tool.…”

Section: Methodsmentioning

confidence: 99%

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Creation of an Aluminum Alloy Template with a Surface Structure by Micro-Milling for Subsequent Replication of the Microstructure to Achieve Hydrophobicity

Knap,

Dvořáčková,

Váňa

2024

JMMP

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This research paper focuses on the fabrication of a microstructure based on a natural structure pattern of hydrophobic properties using micro-milling technology, followed by an investigation of the dimensional accuracy, roughness, and replication of the fabricated microstructure. Design, modeling (CAD system), fabrication, and replication are the steps of this process. Knowledge of biomimetics was used to select the microstructure. The main research aim of the experiments is to verify and extend the applicability of conventional CNC manufacturing technologies to obtain a functional surface structure. The micro-milling was carried out on a conventional DMG MORI CNC machine, a CMX 600 V three-axis horizontal milling center, using an external high-frequency electric spindle clamped to the machine. The machined material was aluminum alloy EN AW 7075. The tool was a 0.1 mm diameter double-edged ball mill made of sintered carbide and coated with TiSiN. The cutting conditions were determined according to the tool manufacturer’s recommendations. To compare the achieved accuracies, the same microstructure was fabricated using PLA technology. For subsequent replication of the sample, the negative of the selected microstructure was created and machined. Subsequently, a positive microstructure was created using the silicone impression material by the replication process. This paper and the experiments performed extend the technical knowledge in the field of manufacturing surface functional structures and confirm the possibility of manufacturing the designed structures using chip and laser machining technology, with achieved discontinuities in the range of 3 to 50 μm. They also highlight the issues of replication of such structures with respect to critical manufacturing locations (geometrical parameters of the structures affecting the functional properties of the structure, venting, replica defects, etc.).

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Section: Methodsmentioning

confidence: 99%

“…The advantage of this technique is the possibility of achieving the formation of very fine structures. Another very challenging but precise technique to obtain fine-structured surfaces is the FIB method [9,10].…”

Section: Introductionmentioning

confidence: 99%

Creation of an Aluminum Alloy Template with a Surface Structure by Micro-Milling for Subsequent Replication of the Microstructure to Achieve Hydrophobicity

Knap,

Dvořáčková,

Váňa

2024

JMMP

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“…Nanowires or nanopillars of different materials were introduced to achieve specific properties such as super-hydrophobicity [2], super-hydrophilicity [3], anti-reflection [4], thermal transport [5], sensitivity [6], etc. Various methods have been adopted to fabricate the nanopillars such as fabricating mould by lithography process [7], focussed ion beam (FIB) process [8], deposition process [9], machining [10], reactive ion etching (RIE) process [11] and AAO membrane [12] and using them for fabricating the same structures on large area by nano-imprint lithography (NIL) [13] or embossing methods [14]. All the above-mentioned processes employed to manufacture the mould offer certain resolution and throughput constraints except AAO membrane.…”

Section: Introductionmentioning

confidence: 99%

Modified polymer nanopillars array for enhanced light trapping on large area

Sharma

Aravindan

Rao

2022

Surface Engineering

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Electroless plating is used to enhance the strength of anodised aluminium oxide (AAO) which can be further utilised as a mould to fabricate the structures on large area of polymer for antireflection properties. Nanopillars of high aspect ratio are fabricated on polymer (polystyrene) sheet by hot embossing process which has ensured repeatability with precision and high throughput. The height of nanopillars matches the depth of the mould cavity. The enhanced light trapping performance is attributed to the high aspect ratio nanopillars with cup-shaped top surface.

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“…A custom mold or pattern can be made with a focused ion beam. However, the method is very time-and costintensive [12][13][14]. Another way to create hierarchical structures is 3D printing.…”

Section: Introductionmentioning

confidence: 99%

“…(b) Detailed image of the surface of this layer with smooth sub-micrometer folds/protrusions. Reprinted from ref [14,19,20]…”

mentioning

confidence: 99%

Formation of Nanostructure during Replication of a Hierarchical Plant Surface

2021

Self Cite

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Plant and animal surfaces have become a model for preparing special synthetic surfaces with low wettability, reflectivity, or antibacterial properties. Processes that lead to the creation of replicas of natural character use two-step imprinting methods. This article describes a technique of synthetic polymer surface preparation by the process of two-stage imprinting. The laboratory-prepared structure copies the original natural pattern at the micrometer and sub-micrometer levels, supplemented by a new substructure. The new substructure identified by the scanning electron microscope is created at the nanometer level during the technological process. The nanostructure is formed only under the conditions that a hierarchical structure forms the surface of the natural replicated pattern, the replication mold is from a soft elastomeric material, and the material for producing the synthetic surface is a polymer capable of crystallizing. A new nanometer substructure formation occurs when the polymer cools to standard laboratory temperature and atmospheric pressure.

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The use of FIB for the preparation of a structure analogous to the natural sur-face and its replication by selected types of polymers

Cited by 3 publications

References 8 publications

Creation of an Aluminum Alloy Template with a Surface Structure by Micro-Milling for Subsequent Replication of the Microstructure to Achieve Hydrophobicity

Creation of an Aluminum Alloy Template with a Surface Structure by Micro-Milling for Subsequent Replication of the Microstructure to Achieve Hydrophobicity

Modified polymer nanopillars array for enhanced light trapping on large area

Formation of Nanostructure during Replication of a Hierarchical Plant Surface

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