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Nanomanufacturing
Volume 4
Issue 4
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Nanomanufacturing, Volume 4, Issue 4 (December 2024) – 4 articles

Cover Story (view full-size image): Initial studies have indicated that structured polymer surfaces can support the attachment and biofilm formation of bacteria, thereby providing the enhanced positive effects of beneficial bacteria, for instance, in the biocontrol in aquacultures. We demonstrate a test platform for the further exploration of the surface topography for bacterial attachment and biofilm growth. It is based on a cyclic olefin copolymer (COC) material platform, and nanoimprint technology was used for the replication of the microstructures. The use of nanoimprint technology ensures precise micropattern transfer, enabling easy prototyping. Further, the process parameters of mold preparation and nanoimprinting are discussed, with the purpose of optimizing the polymer pattern profile. This study has the potential to identify promising surfaces for the biofilm growth of beneficial bacteria. View this paper
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8 pages, 5114 KiB  
Article
Advancing Towards Higher Contrast, Energy-Efficient Screens with Advanced Anti-Glare Manufacturing Technology
by Danielle van der Heijden, Anna Casimiro, Jan Matthijs ter Meulen, Kahraman Keskinbora and Erhan Ercan
Nanomanufacturing 2024, 4(4), 241-248; https://doi.org/10.3390/nanomanufacturing4040016 - 15 Dec 2024
Viewed by 1125
Abstract
The pervasive use of screens, averaging nearly 7 h per day globally between mobile phones, computers, notebooks and TVs, has sparked a growing desire to minimize reflections from ambient lighting and enhance readability in harsh lighting conditions, without the need to increase screen [...] Read more.
The pervasive use of screens, averaging nearly 7 h per day globally between mobile phones, computers, notebooks and TVs, has sparked a growing desire to minimize reflections from ambient lighting and enhance readability in harsh lighting conditions, without the need to increase screen brightness. This demand highlights a significant need for advanced anti-glare (AG) technologies, to increase comfort and eventually reduce energy consumption of the devices. Currently used production technologies are limited in their texture designs, which can lead to suboptimal performance of the anti-glare texture. To overcome this design limitation and improve the performance of the anti-glare feature, this work reports a new, cost-effective, high-volume production method that enables much needed design freedom over a large area. This is achieved by combining mastering via large-area Laser Beam Lithography (LBL) and replication by Nanoimprint Lithography (NIL) processes. The environmental impact of the production method, such as regards material consumption, are considered, and the full cycle from design to final imprint is discussed. Full article
(This article belongs to the Special Issue Nanoimprinting and Sustainability)
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27 pages, 988 KiB  
Review
A Review of Nanostructure Coating Techniques to Achieve High-Precision Optical Fiber Sensing Applications
by Sooping Kok, YunIi Go, Xu Wang and Dennis Wong
Nanomanufacturing 2024, 4(4), 214-240; https://doi.org/10.3390/nanomanufacturing4040015 - 29 Nov 2024
Cited by 1 | Viewed by 1612
Abstract
Optical fiber sensors have emerged as a critical sensing technology across various fields due to their advantages, including high potential bandwidth, electrical isolation that is safe for utilization in electrically hazardous environments, high reliability, and ease of maintenance. However, conventional optical fiber sensors [...] Read more.
Optical fiber sensors have emerged as a critical sensing technology across various fields due to their advantages, including high potential bandwidth, electrical isolation that is safe for utilization in electrically hazardous environments, high reliability, and ease of maintenance. However, conventional optical fiber sensors face limitations in achieving high sensitivity and precision. The integration of nanostructures with advanced coating technology is one of the critical solutions to enhancing sensor functionality. This review examined nanostructure coating techniques that are compatible with optical fiber sensors and evaluated etching techniques for the improvement of optical fiber sensing technology. Techniques such as vapor deposition, laser deposition, and sputtering to coat the nanostructure of novel materials on the optical fiber sensors are analyzed. The ability of optical fiber sensors to interact with the environment via etching techniques is highlighted by comparing the sensing parameters between etched and bare optical fibers. This comprehensive overview aims to provide a detailed understanding of nanostructure coating and etching for optical fiber sensing and offer insights into the current state and future prospects of optical fiber sensor technology for sensing performance advancement, emphasizing its potential in future sensing applications and research directions. Full article
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12 pages, 5808 KiB  
Article
Nanoimprinted Polymeric Structured Surfaces for Facilitating Biofilm Formation of Beneficial Bacteria
by Yuyan Liu, Xavier Ferrer-Florensa, Claus Sternberg, Paul Kempen, Helmut Schift, Lone Gram and Rafael Taboryski
Nanomanufacturing 2024, 4(4), 202-213; https://doi.org/10.3390/nanomanufacturing4040014 - 27 Nov 2024
Viewed by 1035
Abstract
Initial studies indicate that structured polymer surfaces can support the attachment and biofilm formation of bacteria and thereby provide enhanced positive effects of beneficial bacteria, for instance in biocontrol in aquacultures. In this study, we demonstrate a test platform to further explore the [...] Read more.
Initial studies indicate that structured polymer surfaces can support the attachment and biofilm formation of bacteria and thereby provide enhanced positive effects of beneficial bacteria, for instance in biocontrol in aquacultures. In this study, we demonstrate a test platform to further explore the surface topography for bacterial attachment and biofilm growth. It is based on a cyclic olefin copolymer (COC) materials platform, and nanoimprint technology was used for the replication of microstructures. The use of nanoimprint technology ensures precise micropattern transfer, enabling easy prototyping. Further, the process parameters of the mold preparation and nanoimprinting are discussed, with the purpose of optimizing the polymer pattern profile. This study has the potential to identify promising surfaces for biofilm growth of beneficial bacteria. Full article
(This article belongs to the Special Issue Nanoimprinting and Sustainability)
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15 pages, 5247 KiB  
Article
Glucose Oxidation Performance of Zinc Nano-Hexagons Decorated on TiO2 Nanotube Arrays
by Ke Wang and Hoda Amani Hamedani
Nanomanufacturing 2024, 4(4), 187-201; https://doi.org/10.3390/nanomanufacturing4040013 - 4 Oct 2024
Cited by 1 | Viewed by 1211
Abstract
Electrochemically anodized TiO2 nanotube arrays (NTAs) were used as a support material for the electrodeposition of zinc nanoparticles. The morphology, composition, and crystallinity of the materials were examined using scanning electron microscopy (SEM). Electrochemical impedance spectroscopy (EIS) was performed to evaluate the [...] Read more.
Electrochemically anodized TiO2 nanotube arrays (NTAs) were used as a support material for the electrodeposition of zinc nanoparticles. The morphology, composition, and crystallinity of the materials were examined using scanning electron microscopy (SEM). Electrochemical impedance spectroscopy (EIS) was performed to evaluate the electrochemical properties of TiO2 NTAs. Annealing post-anodization was shown to be effective in lowering the impedance of the TiO2 NTAs (measured at 1 kHz frequency). Zinc nanohexagons (NHexs) with a mean diameter of ~300 nm and thickness of 10–20 nm were decorated on the surface of TiO2 NTAs (with a pore diameter of ~80 nm and tube length of ~5 µm) via an electrodeposition process using a zinc-containing deep eutectic solvent. EIS and CV tests were performed to evaluate the functionality of zinc-decorated TiO2 NTAs (Zn/TiO2 NTAs) for glucose oxidation applications. The Zn/TiO2 NTA electrocatalysts obtained at 40 °C demonstrated enhanced glucose sensitivity (160.8 μA mM−1 cm−2 and 4.38 μA mM−1 cm−2) over zinc-based electrocatalysts reported previously. The Zn/TiO2 NTA electrocatalysts developed in this work could be considered as a promising biocompatible electrocatalyst material for in vivo glucose oxidation applications. Full article
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