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
Jun Iwata, Tadashi Ando
Summary: In this study, molecular dynamics simulations were used to investigate the filling process of few-nanometer-wide trenches in UV-NIL. The results showed that resist materials with low viscosities were able to successfully fill the trenches, while resist materials with high viscosity could not. The study also compared the properties of linear photopolymers and found that TPGDA, which is more flexible and can adopt more conformations, had a higher probability of intra-molecular crosslinking. These findings provide valuable information for selecting and designing resists for fine patterning in UV-NIL.
Article
Chemistry, Physical
Ting Hu, Zhi Xing, Lu Huang, Dengxue Li, Xiangchuan Meng, Xiaotian Hu, Yiwang Chen
Summary: To address the limitations of two-dimensional perovskites in photovoltaic applications, a strategy for developing high-quality patterned 2D perovskites was proposed. The patterned films showed improved light absorption and interfacial contact, leading to enhanced efficiencies and stability of the solar cells.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Avinash Baji, Sheeana Gangadoo, Vi Khanh Truong, Mojtaba Abtahi, Arief Budiman, Sruthi Venugopal Oopath
Summary: Nanoimprint lithography was used to fabricate superhydrophobic PVDF-HFP films with uniform micropillar arrays, increasing the hydrophobicity. Coating the films with a self-assembled monolayer of silane further improved their hydrophobicity, resulting in superhydrophobic behavior.
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
Materials Science, Multidisciplinary
Yuanchi Cui, Xuewen Wang, Chengpeng Zhang, Jilai Wang, Zhenyu Shi
Summary: The study utilized a CFD simulation model to analyze resin filling behavior and investigated the effects of process parameters and boundary conditions. Results indicated that inlet velocity had a significant impact on filling height, and boundary slip influenced resin filling behavior significantly.
Article
Engineering, Biomedical
Trung Hoang, Han Truong, Jiyeon Han, Saebom Lee, Jihyeong Lee, Sajjan Parajuli, Jinkee Lee, Gyoujin Cho
Summary: This article reports the first energy-efficient, room-temperature roll-to-roll manufacturing platform for mass production of polymer-based lab-on-a-disc devices. The platform significantly reduces energy consumption and eliminates thermal expansion variations. The manufacturing process includes additive manufacturing and imprinting techniques, enabling the production of a new centrifugal microfluidic chip.
MATERIALS TODAY BIO
(2023)
Article
Energy & Fuels
Danbi Yoo, Peter Tillmann, Tobias Kraus, Johannes Sutter, Angelika Harter, Sergei Trofimov, Boris Naydenov, Klaus Jaeger, Hubert Hauser, Christiane Becker
Summary: This study uses UV-nanoimprint lithography to fabricate and analyze 12 different textures on glass, and examines their angle-resolved reflectance and scattering properties. The results show that textured glass can effectively reduce reflection losses and increase energy yield, especially for photovoltaic systems with large incident angles.
Article
Engineering, Biomedical
Mahya Ganjian, Khashayar Modaresifar, Dionysios Rompolas, Lidy E. E. Fratila-Apachitei, Amir A. A. Zadpoor
Summary: Developing a high-throughput nanopatterning technique with precise control over feature dimensions is crucial for studying cell-nanopattern interactions. This study presents a process that fulfills these criteria by using electron-beam lithography to fabricate controlled arrays of submicron pillars and developing etching procedures to create the desired height. The study demonstrates the significance of the fabricated pillars in inducing osteogenic differentiation and utilizes replication techniques to pattern bio-instructive surfaces. Overall, the method enables the precise fabrication of submicron and nanopatterns for systematic cell studies.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Physical
Achille Francone, Santos Merino, Aritz Retolaza, Jorge Ramiro, Sofia A. Alves, Joana Vieira de Castro, Nuno M. Neves, Ainara Arana, Jose M. Marimon, Clivia M. Sotomayor Torres, Nikolaos Kehagias
Summary: The development of antimicrobial surfaces is crucial in addressing current health crises such as the COVID-19 pandemic and antibiotic-resistant diseases. By introducing physical modifications to surfaces rather than relying on chemical agents, antibacterial properties can be enhanced to effectively combat bacterial attachment.
SURFACES AND INTERFACES
(2021)
Article
Multidisciplinary Sciences
Woo Young Kim, Bo Wook Seo, Sang Hoon Lee, Tae Gyung Lee, Sin Kwon, Won Seok Chang, Sang-Hoon Nam, Nicholas X. Fang, Seok Kim, Young Tae Cho
Summary: A challenge in making a flexible mold stamp using roll-to-roll nanoimprint lithography is to increase area while minimizing perceptible seams. A method that enables the fabrication of scalable, quasi-seamless functional surfaces without the use of alignment marks is proposed. This method is capable of fabricating scalable functional surfaces and imprint molds with quasi-seamless and alignment mark-free patterning.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Carmen Fernandez-Rodriguez, Jesus Paredes, Jon Etxarri, Edurne Tellechea, Maria Luz Martinez-Chantar, Luis Alfonso Martinez-Cruz, Iban Quintana
Summary: Macromolecule crystallography is the most powerful technique for determining protein structure, but is limited by the difficulty of obtaining suitable crystals. This research explores the use of Laser Ablation and Nanoimprint Lithography to create novel heteronucleants on polymeric substrates, which promote protein crystal growth. The results show that the aspect ratio of the topography and the combination of micro- and nano-scale features significantly improve the efficiency of the crystallization process.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Inyong Hwang, Mingyun Kim, Jaeyeon Yu, Jihye Lee, Jun-Hyuk Choi, Su A. Park, Won Seok Chang, Jongwon Lee, Joo-Yun Jung
Summary: SEIRA spectroscopy utilizes near-field effects in nanostructures for highly sensitive detection, with a 10 nm thick MA achieving a record-high reflection difference SEIRA signal in experiments. MAs can be mass-produced through nanoimprint lithography and dry etching, offering a promising technological pathway for sensing and detection applications.
Article
Nanoscience & Nanotechnology
Javier Redolat, Maria Camarena-Perez, Amadeu Griol, Miroslavna Kovylina, Angelos Xomalis, Jeremy J. Baumberg, Alejandro Martinez, Elena Pinilla-Cienfuegos
Summary: Controlled integration of metallic nanoparticles onto photonic nanostructures enables the realization of complex devices for extreme light confinement and enhanced light-matter interaction. A methodology for precise transfer and positioning of individual nanoparticles onto different photonic nanostructures is presented, using soft lithography printing. Raman spectroscopy confirms enhanced light-matter interactions in the resulting nanophotonic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ruifeng Zhu, Gabriela Figueroa-Miranda, Lei Zhou, Ziheng Hu, Bohdan Lenyk, Sven Ingebrandt, Andreas Offenhaeusser, Dirk Mayer
Summary: A dual-signal protocol was developed, combining electrochemical and optical detection methods using gold nanopit arrays, to improve aptamer-based biosensors. The non-fully penetrating AuNpA showed better plasmonic properties and enlarged the electrochemical active surface area compared to fully penetrating structures. The simultaneous use of electrochemical and optical transducers led to different detection limits, dynamic ranges, and sensitivities, providing new opportunities for disease diagnosis and point-of-care testing.