Article
Chemistry, Multidisciplinary
Philipp Taus, Adrian Prinz, Heinz D. Wanzenboeck, Patrick Schuller, Anton Tsenov, Markus Schinnerl, Mostafa M. Shawrav, Michael Haslinger, Michael Muehlberger
Summary: This study demonstrates different approaches for generating sophisticated undercut T-shaped masters suitable for nanoimprint lithography, successfully fabricating single-layer and multilayer undercut T-shaped structures, which can be applied to replicate structural colors on artificial surfaces in the future.
Article
Materials Science, Multidisciplinary
Xinyi Cao, Yibo Xiao, Qiao Dong, Shaobo Zhang, Junzhuan Wang, Lianhui Wang, Li Gao
Summary: This study reports a low-cost and large-area fabrication method for metasurfaces through a combination of soft nanoimprint lithography and reactive ion etching. The size of meta-atoms can be tuned by controlling the etching condition carefully and implementing an iterative imprint and etch process. This approach is effective for wafer-scale nanophotonics, allowing for alteration of metasurface resonances and replication of new structures with minimum cost.
ADVANCED PHOTONICS RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Natalia Turek, Piotr Pala, Andrea Szpecht, Adrian Zajac, Teresa Sembratowicz, Tadeusz Martynkien, Marcin Smiglak, Katarzyna Komorowska
Summary: We propose a method to fabricate microstructures on the tip of an optical fiber using a UV soft-imprint process of a polymerizable ionic liquid-based optical resist. The process involves using an ionic liquid with UV-sensitive groups and non-hazardous propylene glycol as a liquid material for imprinting. The method is simple and can lead to the fabrication of diffraction gratings and a grism component for an optical fiber spectrometer.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Dorte R. Danielsen, Anton Lyksborg-Andersen, Kirstine E. S. Nielsen, Bjarke S. Jessen, Timothy J. Booth, Manh-Ha Doan, Yingqiu Zhou, Peter Boggild, Lene Gammelgaard
Summary: This study explores the effects of anisotropic etching with sulfur hexafluoride (SF6) on multilayer 2D materials, showing that it induces hexagonal features in transition metal dichalcogenides. Furthermore, it demonstrates that anisotropic SF6 reactive ion etching process can downsize nanostructures significantly below the resolution limit of electron beam lithography for smooth edges, sharp corners, and feature sizes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Polymer Science
Mingjun Qiu, Weiwei Du, Shangyu Zhou, Pengzhe Cai, Yingwu Luo, Xiaoxue Wang, Rong Yang, Junjie Zhao
Summary: This review summarizes the recent progress in non-photolithographic patterning methods, including soft lithography, nanoimprint lithography, direct writing, self-assembly of block copolymers, area-selective vapor phase deposition, and instability-induced patterning. These methods have been applied in various applications such as chromic devices, polymer light-emitting diodes, sensors, transistors, protein and cellular engineering, and more. The challenges and future research directions of non-photolithographic patterning approaches are highlighted, focusing on resolution, reliability, and scalability.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Minwook Kim, Dong Kyo Oh, Jeong Dae Kim, Minsu Jeong, Hongyoon Kim, Chunghwan Jung, Jungkeun Song, Wonjun Lee, Junsuk Rho, Jong G. Ok
Summary: We propose a rapid and simple method to create Ag nanostructures by using direct mechanical patterning and thermal annealing. The Ag nanostructures are obtained from ionic Ag ink coating that is spin-coated onto the desired substrate and then reduced by thermal annealing. The study systematically investigates the optimal patterning conditions and demonstrates the tunable photonic functionality of Ag architecture.
Article
Chemistry, Physical
Yangkai Chen, Huan Li, Jianmei Chen, Dong Li, Mengyuan Zhang, Guanghua Yu, Lin Jiang, Yi Zong, Bin Dong, Zhoufang Zeng, Yandong Wang, Lifeng Chi
Summary: This study presents highly effective SERS substrates with self-generating nanogaps, achieving controlled high density hot spots. The emergence of multimode hot spots makes the SG SERS substrates superior in enhancement, uniformity, and reproducibility compared to traditional substrates. Therefore, SG SERS substrates can serve as excellent platforms for trace molecule detection in practical applications.
Article
Chemistry, Physical
Doo San Kim, Yun Jong Jang, Ye Eun Kim, Hong Seong Gil, Hee Ju Kim, You Jin Ji, Hyung Yong Kim, In Ho Kim, Myoung Kwan Chae, Jong Chul Park, Geun Young Yeom
Summary: In this study, a dual exhaust system was implemented in a reactive ion beam etcher (RIBE) to control the radical flux relative to ion flux during the etching process. The additional exhausting of radicals through the inductively coupled plasma (ICP) source chamber decreased both the ICP source chamber pressure and the ratio of radical flux to ion flux. This control of the radical flux is believed to be beneficial for anisotropic etching of nanoscale features in the next generation RIBE.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Lukas Helmbrecht, Moritz H. Futscher, Loreta A. Muscarella, Bruno Ehrler, Willem L. Noorduin
Summary: Ion exchange lithography is introduced in this work for spatially controlled patterning of materials with tunable optoelectronic properties. A variety of conversion inks can be applied on a reactive film to create well-defined patterns with customizable optoelectronic properties using different printing techniques. The converted canvas can be utilized to fabricate functional devices like green light-emitting diodes, showcasing the potential of ion exchange lithography.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Adriaan J. Taal, Jake Rabinowitz, Kenneth L. Shepard
Summary: Mr-EBL is established as the highest throughput negative tone electron-beam-sensitive resist, with the ability to fabricate high-resolution nanometer-scale devices in a ten minute EBL process. Optimized processing conditions result in 3x faster write speeds compared to other materials, and the resist demonstrates robust negative etch mask properties with high aspect ratio silicon trenches and near-vertical sidewalls.
Article
Chemistry, Multidisciplinary
Lucie Simonova, Milan Matejka, Alexandr Knapek, Tomas Kralik, Zuzana Pokorna, Filip Mika, Tomas Fort, Ondrej Man, Pavel Skarvada, Alexandr Otahal, Pavel Cudek
Summary: This research focuses on developing a new method for creating nanostructures with high emissivity to match the needs of a selective emitter for the visible and near-infrared region in a thermophotovoltaic system. By using tungsten as the main material and optimizing the process parameters, the study successfully developed nanostructures that can potentially improve the selectivity of the thermophotovoltaic emitter.
Article
Chemistry, Physical
Wangxiang Li, Daichi Kitagawa, Seiya Kobatake, Elena Bekyarova, Christopher J. Bardeen
Summary: This work demonstrates the use of electron beam lithography to create sub-micron structural features on single photomechanical crystals. The height increase of these features can be reversed and undergo multiple cycles, and the changes are strong enough to rupture a graphene sheet placed on top of the crystals. A dynamic extrusion model is proposed to explain the amplification of molecular-level photomechanical changes through nanoscale features.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Physical
Chunhui Wang, Yu Fan, Jinyou Shao, Zhengjie Yang, Jiaxing Sun, Hongmiao Tian, Xiangming Li
Summary: The study introduces a discretely-supported nanoimprint lithography (NIL) technique to address the challenge of nano-patterning on non-planar surfaces, successfully fabricating nanostructures on LED chips and increasing optical output power by more than 40%. This innovation could potentially lead to the development of high performance devices based on discretely-supported NIL.
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
Spectroscopy
Guangxu Su, Pan Hu, Junzheng Hu, Xinluo Wang, Guoliang Wu, Yunpeng Shang, Peng Zhan, Fanxin Liu, Wei Wu
Summary: This research presents a coupled Au/DNAs/Au gap plasmon platform for mercury ion sensing, which exhibits remarkable SERS enhancement and high sensitivity. Large area Au nanofingers with excellent uniformity and flexibility are fabricated using nanoimprint lithography. These Au nanofingers are then modified by DNA aptamers to form Au/DNAs/Au gap plasmon nanostructures with well-defined gap sizes. The platform successfully detects ultralow concentrations of Hg2+ down to 10(-9) M, demonstrating its high selectivity and sensitivity for molecule sensing applications.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Engineering, Chemical
B. T. H. Borgelink, A. E. Carchia, J. F. Hernandez-Sanchez, D. Caputo, J. G. E. Gardeniers, A. Susarrey-Arce
Summary: The new computational model for predicting the filtering efficiency of N95 facemasks presents a more realistic view of practical facemasks with different particle capturing mechanisms. The simulation results show that capturing efficiencies vary with droplet diameter and air inflow velocity, and the model compares well with experimental results. The numerical approach is expected to contribute to the optimization of anti-viral facemasks.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Sandrien Verloy, Bert Vankeerberghen, Ignaas S. M. Jimidar, Han Gardeniers, Gert Desmet
Summary: The study found that the combination of wet rubbing with a patterned rubbing tool is the most suitable method for filling micromachined pockets on silicon substrates, providing excellent results with minimal damage or misplaced particles.
Article
Engineering, Environmental
Sandra Motta Cabrera, Louis Winnubst, Hannes Richter, Ingolf Voigt, Jeffrey McCutcheon, Arian Nijmeijer
Summary: An industrial ceramic nanofiltration membrane was tested for treating wastewater from a Canadian oil field, and the results show that the membrane has a high rejection rate for ions and compounds, making it suitable for oil field wastewater treatment.
Article
Materials Science, Multidisciplinary
Jedrzej Winczewski, Manuel Herrera, Clement Cabriel, Ignacio Izeddin, Stefan Gabel, Benoit Merle, Arturo Susarrey Arce, Han Gardeniers
Summary: This study develops a tailor-made organo-metallic resin suitable for two-photon lithography, which enables the additive manufacturing of 3D luminescent microarchitectures emitting light in the visible range. Through thermal treatment in an oxygen-rich atmosphere, silicon-free ZrO2 structures can be created using this resin, which is compatible with a luminescent activator and allows for tuning of the optical properties.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Ali Margot Huerta-Flores, Francisco Ruiz-Zepeda, Cavit Eyovge, Jedrzej P. Winczewski, Matthias Vandichel, Miran Gaberscek, Nicolas D. Boscher, Han J. G. E. Gardeniers, Leticia M. Torres-Martinez, Arturo Susarrey-Arce
Summary: This study synthesized a new RuO2/CuxO/Ta2O5/SrZrO3 heterostructure that achieved a high H-2 production of 5164 mu mol g(-1) h(-1) under simulated solar light, which was significantly higher than other heterostructures. The addition of the binary catalyst CuxO resulted in higher H-2 production. The presence of the binary catalyst improved the charge carrier transport and the solar to hydrogen conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Wenyu Zhou, Juergen Malzbender, Fanlin Zeng, Wendelin Deibert, Louis Winnubst, Arian Nijmeijer, Olivier Guillon, Ruth Schwaiger, Wilhelm Albert Meulenberg
Summary: The mechanical properties of BCZ20Y15-GDC15 dual-phase material were investigated in this study. The introduction of GDC15 was found to enhance the material's toughness, providing a foundation for designing structurally stable components.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Analytical
Duy Le-Anh, Ashit Rao, Amy Stetten, Subhash Ayirala, Mohammed Alotaibi, Michel Duits, Han Gardeniers, Ali AlYousef, Frieder Mugele
Summary: In this study, a 2.5D glass microchannel coated with calcite particles was used to mimic the multiple porosity length scales and surface heterogeneity of carbonate reservoirs. The results showed that flooding with high-salinity water at varying temperatures and durations can effectively enhance the liberation of crude oil in the reservoir. The experiment also revealed that wall roughness in the microscale model plays a more significant role in oil retention than surface chemistry.
Article
Materials Science, Multidisciplinary
M. A. Rodriguez-Olguin, C. Flox, R. Ponce-Perez, R. Lipin, F. Ruiz-Zepeda, J. P. Winczewski, T. Kallio, M. Vandichel, J. Guerrero-Sanchez, J. G. E. Gardeniers, N. Takeuchi, A. Susarrey-Arce
Summary: We report the finding that incorporating chlorine into NiO can transform it into an active electrocatalyst for the reduction of CO2 to formate. Chlorine-containing NiO particles synthesized by a solid-state method exhibit high Faradaic efficiency and current density for formate production. XPS and STEM-EDX analysis confirm the presence of Ni3+, Ni2+, and Cl species. DFT modeling and Pourbaix diagrams provide insights into the role of Cl on the NiO surface.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Analytical
Amel Meziani, Sandrien Verloy, Ouassila Ferroukhi, Sebastien Roca, Aurelien Curat, Severine Tisse, Valerie Peulon-Agasse, Han Gardeniers, Gert Desmet, Pascal Cardinael
Summary: This study investigated the use of a dedicated gas chromatography column with radially elongated pillars as the second column in a comprehensive two-dimensional gas chromatography system. The study found that the use of a vacuum pressure program significantly improved efficiency, and identified optimal experimental conditions for the best performance of the column.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Chemical
Ward Van Geite, Ignaas S. M. Jimidar, Han Gardeniers, Gert Desmet
Summary: A universal and rapid dry assembly strategy is proposed to attain ordered arrays of micro- and nanoparticles. This method involves shooting agglomerated monodisperse silica, polystyrene, or PMMA powder microspheres against an impact plating and attracting them towards the pores of a silicon membrane device by applying a vacuum force. Excess particles are removed by brushing. The optimized conditions can be used to attain any desired 2-D particle arrangement on soft surfaces.
Article
Nanoscience & Nanotechnology
Dirk Jonker, Ketki Srivastava, Marta Lafuente, Arturo Susarrey-Arce, Ward van der Stam, Albert van den Berg, Mathieu Odijk, Han J. G. E. Gardeniers
Summary: In this study, gold nanoparticles with a diameter of 67 +/- 6 nm supported by vertically aligned shell-insulated silicon nanocones were formed for ultralow variance SERS. The morphology and optical properties of the substrates were assessed through various characterization techniques. The SERS activity was measured and compared to other lithographically derived assemblies. The low variance of our substrates makes them suitable for many potential SERS applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ignaas S. M. Jimidar, Wojciech Kwiecinski, Gijs Roozendaal, E. Stefan Kooij, Han J. G. E. Gardeniers, Gert Desmet, Kai Sotthewes
Summary: Contact electrification is the exchange of electrical charges between two surfaces when they are in contact. This principle has been used in triboelectric nanogenerators (TENGs) to generate electricity. This study demonstrates the important role of water in the charge exchange process between two insulating surfaces with different wettability. The charging process is faster and acquires more charge with increasing relative humidity, especially beyond RH = 40%. The study also reveals the effect of humidity on the charging time constant. The findings contribute to the understanding of how humidity levels influence the charging process and have implications for the design of more efficient TENGs and other eco-energy harvesting devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Akash Raman, Carla Corina dos Santos Porto, Han Gardeniers, Cintia Soares, David Fernandez Rivas, Natan Padoin
Summary: This study simulated a system consisting of spatially-decoupled electrolytic bubbles and analyzed the growth and departure process of electrolytic bubbles and their impact on gas evolution efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemical Research Methods
Bert Vankeerberghen, Sandrien Verloy, Ignaas S. M. Jimidar, Han Gardeniers, Gert Desmet
Summary: We introduce a novel concept of producing ordered beds of spherical particles for liquid chromatography. This concept involves positioning spherical particles individually or stacked in micromachined pockets, forming an interconnected array of micro-grooves. Our breakthrough involves achieving uniform filling of the microgroove arrays with spherical particles using a rubbing approach. Numerical calculations show the advantages of this new concept over conventional packed beds in terms of order and reduced flow resistance.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Chemistry, Multidisciplinary
Jedrzej Winczewski, Manuel Herrera, Han Gardeniers, Arturo Susarrey-Arce
Summary: This paper presents the additive manufacturing of three-dimensional structured phosphors emitting red, green, blue, and white, which allows advanced applications in optics and photonics. This development is a step forward in realizing additive color synthesis within complex architectures relevant to integrated optics or light-emitting sources.
CHEMICAL COMMUNICATIONS
(2023)