Article
Materials Science, Multidisciplinary
Sivan Tzadka, Imon Kalyan, Esti Toledo, Yonatan Sivan, Mark Schvartzman
Summary: Optical polymers have the potential to be lightweight and cost-effective for refractive optical components; however, they exhibit reflection of incident light. In this study, we propose a new approach to engineering highly effective antireflective structures on the surface of optical polymers, achieving a remarkable reduction in surface reflection. These structures were fabricated using high-throughput nanoimprint lithography and demonstrated superior optical performance due to precise index matching with the underlying substrate. Our findings also showed that the antireflective effect correlated with the index-matching of these structures when applied to different polymers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Alejandra Jacobo-Martin, Jaime J. Hernandez, Patricia Pedraz, Eduardo Solano, Ivan Navarro-Baena, Isabel Rodriguez
Summary: The thermal stability of antireflective moth-eye topographical features fabricated by nanoimprint lithography on PMMA incorporating TiO2 nanoparticles is greatly improved, delaying pattern relaxation and enhancing pattern stability even at high temperatures. This enhancement in thermal behavior will significantly improve the functionality and performance of the antireflective films, especially in light-trapping applications where temperatures typically rise.
Article
Chemistry, Physical
Alejandra Jacobo-Martin, Jaime J. Hernandez, Eduardo Solano, Miguel A. Monclus, Juan Carlos Martinez, Daniel F. Fernandes, Patricia Pedraz, Jon M. Molina-Aldareguia, Tomas Kubart, Isabel Rodriguez
Summary: Moth-eye nanostructures have various functionalities, but their poor mechanical resilience and durability limit their practical applications. In this study, a thin oxide coating is used to protect the nanostructures and improve their thermal stability and self-cleaning functionality.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Alejandra Jacobo-Martin, Jaime J. Hernandez, Patricia Pedraz, Ivan Navarro-Baena, Miguel A. Monclus, Jon M. Molina-Aldareguia, Isabel Rodriguez
Summary: This study presents a fabrication method for bioinspired moth-eye antireflective films using PVDF and TiO2 nanoparticles, which improves the mechanical and thermal stability of the films. Various tests were conducted to evaluate the optical performance and durability of the films, aiming to expand their potential for use in solar devices.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Multidisciplinary Sciences
Alejandra Jacobo-Martin, Mario Rueda, Jaime J. Hernandez, Ivan Navarro-Baena, Miguel A. Monclus, Jon M. Molina-Aldareguia, Isabel Rodriguez
Summary: This work describes the fabrication process of moth eye antireflective poly (methyl methacrylate) transparent films using roll-to-roll thermal nanoimprint lithography, adjusting process parameters to obtain a range of antireflective topographies. A correlation between process parameters and film properties is established, and a finite element model predicts the mechanical behavior of the imprinted nanostructures.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
Nichole Cates, Vincent J. Einck, Lauren Micklow, Jacobo Morere, Uzodinma Okoroanyanwu, James J. Watkins, Stephen Furst
Summary: A high-throughput process combining roll-to-roll nanoimprint lithography and nanocoining has been developed to achieve large-area nanopatterning. This method has the potential to transfer exciting lab-scale discoveries to industrial-scale manufacturing without the prohibitively high cost associated with fabricating a master mold.
Article
Chemistry, Multidisciplinary
Christine Thanner, Martin Eibelhuber
Summary: The UV Nanoimprint Lithography is efficient in producing resist layers with features ranging from micrometers to nanometers. Understanding material properties, pattern size, and shape is crucial for optimizing processes for reliable manufacturing. Comparing results for different pattern geometries can provide a helpful overview of relevant process parameters.
Article
Chemistry, Multidisciplinary
Mirko Lohse, Manuel W. Thesen, Anja Haase, Martin Smolka, Nerea Briz Iceta, Ana Ayerdi Izquierdo, Isbaal Ramos, Clarisa Salado, Arne Schleunitz
Summary: This study presents the fabrication process of a novel network of micron-sized channels using UV-nanoimprint lithography, along with an evaluation of a suitable UV-curable material. The results suggest that the given pattern, in combination with the resist, can lead to faster, cheaper, and more reliable drug screening.
Article
Engineering, Chemical
Manogna Jambhapuram, James K. Good, Aurelie Azoug
Summary: Roll-to-Roll manufacturing aims to scale ultraviolet- and thermally cured nanoimprint lithography to commercial production speeds and volumes. Winding is an important step in storing large quantities of nanoimprinted webs, but the contact pressure during winding can affect the imprinted peak heights and functionality of the surface. This study develops a numerical model to investigate the impact of contact pressure on the imprinted web during winding.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Chemistry, Physical
Yan Gu, Yishuo Zhang, Jieqiong Lin, Huibo Zhao, Haihang Ma, Hongwei Yao, Mingshuo Kang, Bin Fu, Silin Liu
Summary: In this study, a piezoelectric-driven vibration-assisted UV nanoimprint method was proposed to improve the performance of diffraction gratings. It was found that introducing one-dimensional lateral vibrations with low frequency and low amplitude improved surface quality and filling rate of the grating. The effects of grating properties and vibration parameters were investigated, and a novel asymmetric vibration stage was designed. The method was verified to accurately fabricate diffraction gratings with superior performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Sruthi Venugopal Oopath, Avinash Baji, Mojtaba Abtahi
Summary: This study aims to produce a hydrophobic polymer film by mimicking the hierarchical micro/nanostructures found on the surface of rose petals. The presence of these structures on the polyurethane acrylate (PUA) film influenced its wettability behavior, leading to a highly hydrophobic surface. The film also displayed the water pinning effect, similar to natural materials.
Article
Chemistry, Multidisciplinary
Kazuhiro Kato, Hiroyuki Sugawara, Jun Taniguchi
Summary: There is a high demand for a highly mass-producible technology for manufacturing moth-eye-structured films with antireflection function. Conventional films are made using roll-to-roll ultraviolet nanoimprint lithography with aluminum, but the process is complicated and time-consuming. To solve this problem, a sputtering process for forming a thin film of glassy carbon on a roll substrate was proposed, which resulted in a moth-eye structure through oxygen plasma irradiation. The glassy carbon roll mold showed superior antireflection, water repellency, and productivity compared to the moth-eye-structured film made with porous alumina.
Article
Polymer Science
Demei Lee, Ya-Ling Tang, Shih-Jung Liu
Summary: Nanofeatured polymeric films were successfully fabricated using nanosphere lithography and UV soft-mold roller embossing, showcasing their application in solar cells. Empirical outcomes demonstrate that UV soft-mold roller embossing offers a simple yet potent way of producing nanofeatured films, with different processing variables influencing the reproducibility of the films.
Article
Chemistry, Physical
Haiqiao Zhang, Jian Gan, Yan Wu, Zhihui Wu
Summary: Imitating nature and understanding its mechanisms is important for advancing the development of functional materials. This study successfully replicated the micro-nano hierarchical structure of a lotus leaf surface using UV nanoimprint lithography technology. The obtained UV-curable waterborne polyurethane acrylate surfaces exhibited special wetting and superhydrophobic properties. The study showed that higher UV intensity resulted in a more accurate replication of the lotus leaf structure, leading to a larger water contact angle and higher adhesive force.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Michael Muehlberger, Stephan Ruttloff, Dieter Nees, Amiya Moharana, Maria R. Belegratis, Philipp Taus, Sonja Kopp, Heinz D. Wanzenboeck, Adrian Prinz, Daniel Fechtig
Summary: This study demonstrated the process of UV-based nanoimprinting using a proprietary imprint material, successfully replicating multi-layer undercut stamps and producing multi-layer undercut nanoimprinted samples.
Article
Engineering, Biomedical
Muhammad Omar Shaikh, Ting-Chi Huang, Ting-Feng Wu, Cheng-Hsin Chuang
BIOMEDICAL MICRODEVICES
(2020)
Review
Chemistry, Multidisciplinary
Amit Kumar, Muhammad Omar Shaikh, Cheng-Hsin Chuang
Summary: The synthesis methods of silver nanowires and their application in transparent conducting electrodes are reviewed in detail, including various synthesis protocols and deposition techniques. Additionally, treatments for enhancing their optoelectronic properties are also discussed.
Article
Chemistry, Analytical
Da-Huei Lee, Cheng-Hsin Chuang, Muhammad Omar Shaikh, Yong-Syuan Dai, Shao-Yu Wang, Zhi-Hong Wen, Chung-Kun Yen, Chien-Feng Liao, Cheng-Tang Pan
Summary: Flexible piezoresistive tactile sensors made with nanocomposite polymeric materials have shown good flexibility and sensitivity. By achieving uniform dispersion of filler material and optimizing sensor design, the sensing performance can be significantly improved in both low-pressure and saturation ranges. The proposed sensor demonstrates practical feasibility for various wearable technologies and robotic applications.
Review
Chemistry, Analytical
R. K. Rakesh Kumar, Muhammad Omar Shaikh, Cheng-Hsin Chuang
Summary: Creatinine biosensing is a rapidly developing field, with enzymatic and non-enzymatic strategies being common approaches. Non-enzymatic electrochemical sensors show great promise for point-of-care applications. There is a lack of reviews addressing recent advances in non-enzymatic creatinine biosensors, and further research is needed to evaluate and summarize the progress in this area.
ANALYTICA CHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Muhammad Omar Shaikh, Jia-Yu Yang, Cheng-Hsin Chuang
Summary: This study successfully developed thermally stable and durable superhydrophobic surfaces on stainless steel using a facile two-step protocol, which significantly enhanced the hydrophobicity of the SS surface with a water contact angle over 170 degrees. Optimization of SAM coating time, temperature and concentration achieved dense and uniform coverage on the surface, highlighting the practical applicability of the proposed protocol in healthcare and industry.
MICROFLUIDICS AND NANOFLUIDICS
(2021)
Article
Chemistry, Multidisciplinary
Amit Kumar, Muhammad Omar Shaikh, R. K. Rakesh Kumar, Karishma Dutt, Cheng-Tang Pan, Cheng-Hsin Chuang
Summary: This study presents the development of a flexible and biocompatible high-resolution wearable temperature sensor using ultra-long Ag-Au core-sheath nanowires dispersed in elastomeric media. The novel nanocomposite ink can be printed on interdigitated electrodes to fabricate a temperature sensor with negative temperature coefficient of resistance and quick response time. The proposed temperature sensing mechanism controls the internanowire distance of the nanowires which demonstrates promise for a range of wearable applications.
Article
Chemistry, Analytical
Amit Kumar, Pen-Yi Hsieh, Muhammad Omar Shaikh, R. K. Rakesh Kumar, Cheng-Hsin Chuang
Summary: In this study, low-cost and flexible temperature sensors were developed using polyethylene glycol (PEG) and polyurethane (PU)-based shape-stabilized copolymer nanocomposites. By adding multi-walled carbon nanotubes (MWCNT) as a conductive filler, the nanocomposites exhibited thermoresistive properties. The chemically crosslinked nanocomposite showed improved thermosensitive behavior compared to the physically mixed nanocomposite.
Article
Engineering, Electrical & Electronic
Ming-Chan Lee, Cheng-Hsin Chuang, Da-Huei Lee, Cheng-Tang Pan, Kuan-Ming Li
Summary: This paper presents the design and implementation of fuzzy logic control for human walking using lab-developed sensors and the second lower limb robotic exoskeleton (LLRE-II) to detect gait phases. The proposed sensor with grid structures fabricated using polymer composites of multi-walled carbon nanotubes (MWCNTs) combined with polydimethylsiloxane (PDMS) can accurately measure foot pressure and predict human walking behavior. The performance of the proposed algorithm for gait phase detection was verified experimentally, showing the ability to detect both regular and irregular walking patterns.
IEEE SENSORS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
R. K. Rakesh Kumar, Muhammad Omar Shaikh, Amit Kumar, Chi-Hao Liu, Cheng-Hsin Chuang
Summary: Here, a novel enzymeless electrochemical biosensor was developed for highly specific detection of creatinine using zwitterion-functionalized cuprous oxide nanoparticles (Cu2O NPs). The biosensor demonstrated a fast response time, good reproducibility, and high specificity against interferents. It also showed a linear response to creatinine concentration within the physiological range in human serum, with robust storage stability over an extended period of time.
ACS APPLIED NANO MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Aya Osama Mousa, Zheng-Ian Lin, Cheng-Hsin Chuang, Chih-Kuang Chen, Shiao-Wei Kuo, Mohamed Gamal Mohamed
Summary: In this study, two conjugated microporous polymers (CMPs), An-Ph-TPA and An-Ph-Py CMPs, were synthesized using the Suzuki cross-coupling reaction. The CMPs demonstrated organic structures with p-conjugated skeletons and persistent micro-porosity, containing anthracene moieties linked to triphenylamine and pyrene units. The chemical structures, porosities, thermal stabilities, and morphologies of the synthesized CMPs were characterized using various techniques. The An-Ph-TPA CMP exhibited better thermal stability and higher capacitance performance, making it a potential candidate for electrochemical testing and biological applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Aya Osama Mousa, Mohamed Gamal Mohamed, Cheng-Hsin Chuang, Shiao-Wei Kuo
Summary: A microporous carbon material (Py-PDT POP-600) with high nitrogen content and excellent CO2 uptake and specific capacitance was successfully prepared by carbonization of Py-PDT POP.
Article
Biochemistry & Molecular Biology
Aya Osama Mousa, Cheng-Hsin Chuang, Shiao-Wei Kuo, Mohamed Gamal Mohamed
Summary: This study focuses on the development of two novel porous organic polymers (POPs) constructed using a simple method. The synthesized POPs showed exceptional thermal stability, with one of them exhibiting high surface area and porosity. These POPs have the potential for applications such as supercapacitor electrodes and gas adsorption.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)