Article
Materials Science, Multidisciplinary
Agnes Szabo, Hanna Liliom, Zoltan Fekete, Katalin Schlett, Anita Pongracz
Summary: Tailoring the surface topography of neural implants can influence the size and alignment of astrocyte nuclei, with microgrooves showing better guidance and higher elongation rates compared to micropillars. SU-8 based micropatterns have an impact on cell nuclei even shortly after attachment.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Pradeep Kumar Ramkumar, Corey M. Rountree, Laxman Saggere, John D. Finan
Summary: This study presents a unique methodology for non-destructive dimensional characterization of SU-8 microstructures using the emitted autofluorescence radiation. The relationship between autofluorescence emission intensities and SEM-measured thicknesses of microstructures was used to accurately characterize unknown SU-8 microstructures. The results suggest a feasible and accurate non-destructive, low-cost metrological technique for characterizing SU-8 microstructures using autofluorescence emission intensities.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2021)
Article
Chemistry, Physical
Lingqi Huang, Zhiyong Luo, Wenjie Han, Qi Zhang, He Zhu, Shiping Zhu
Summary: In this study, hollow porous carbons (HPCs) were prepared using a simple and cost-effective method, and their potential in catalysis was demonstrated through the fabrication of Au@HPCs yolk-shell composites.
Article
Chemistry, Multidisciplinary
Yan-Jun Huang, Wen-Huei Chang, Yi-Jui Chen, Chun-Hung Lin
Summary: The paper introduces a simple and cost-effective method for creating metal/SU-8 nanocomposites by applying a metal precursor drop onto the surface or nanostructure of SU-8 and exposing it to UV light. No pre-mixing or pre-synthesis of metal nanoparticles is required. TEM analysis confirms the composition and depth distribution of silver nanoparticles in the nanocomposites. The antibacterial properties of the nanocomposites are evaluated. Additionally, composite surfaces with customized colors and spectra are produced using gold and silver precursors.
Review
Chemistry, Analytical
Pooria Golvari, Stephen M. Kuebler
Summary: This review surveys the advances in fabricating functional microdevices using multi-photon lithography (MPL) with the SU-8 material system, focusing on the progress made in the last five years and discussing methods for improving resolution and functionalizing structures after fabrication.
Article
Engineering, Biomedical
Daeho Ryu, Youjin Lee, Yongseung Lee, Yena Lee, Seoyoung Hwang, Yong-Kweon Kim, Sang Beom Jun, Hyang Woon Lee, Chang-Hyeon Ji
Summary: This paper presents a conventional LED and polymer waveguide coupled silicon optrode array, which achieves high coupling efficiency through lens design and SU-8 photoresist. The experiment demonstrates the capability of optical stimulation and neural signal recording in vivo.
JOURNAL OF NEURAL ENGINEERING
(2022)
Article
Polymer Science
Zixuan Zheng, Guojie Liang, Li Li, Jing Liu, Xinbo Wang, Yi Sun, Kai Li
Summary: This study proposes an efficient approach for fabricating carbon foam-reinforced carbon aerogel composites. By compounding nanoporous polyimide aerogel with pre-carbonized phenolic resin-based carbon foam, co-shrinkage is achieved during co-carbonization, effectively utilizing the thermal insulation capacity of carbon aerogel and formability of pre-carbonized foam.
Article
Engineering, Electrical & Electronic
Manu Garg, Dhairya Singh Arya, Sushil Kumar, Mujeeb Yousuf, Yi Chiu, Pushpapraj Singh
Summary: This paper introduces a SU-8 dielectric mu-bridge based polymer microelectromechanical systems (MEMS) Pirani gauge for hermetic characterization of packaged electronic sensors. The gauge achieves simplicity in fabrication, lower footprint, and superior thermal isolation from the substrate.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2022)
Article
Chemistry, Physical
Hun Seok Choi, Young Hwan Kim, Hyun Kyung Kim, Kwang-Bum Kim
Summary: This study proposes a novel approach to address three critical challenges in the synthesis of MOF-derived carbons, which include the collapse and aggregation of carbonized MOFs, the low electrical conductivity of MOF-derived sp3-dominated amorphous carbons, and the controlled assembly of MOFs into a microspherical powder form. The approach involves wrapping ZIF-8 with GO sheets, assembling the GO-wrapped ZIF-8 into microspheres, and performing confined carbonization. The GO sheets serve as both a structural and conductive scaffold, improving morphological stability, preventing aggregation, and enhancing electrical conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Qiushu Zhang, Zhihao Guo, Zhinan Ma, Song Wang, Bei Peng
Summary: We propose a simple, robust, and cheap micro fabrication method using thermally manipulating capillary action in PDMS microholes to prepare SU-8 curved microstructures. The microstructure morphology, including convexity-concavity and curvature, can be controlled by adjusting the formation temperature. The fabricated microstructures with a spherical surface can be used as a microlens array or a mold. Clear and uniform images were observed using the generated microlens arrays. The proposed method has the potential for industrial applications.
Article
Chemistry, Multidisciplinary
Haoyun Hu, Guihua Ruan, Xiangqiong Jiang, Hong Pan, Zhuqiang Wu, Yipeng Huang
Summary: A convenient, sustainable, and efficient method for the fabrication of monodispersed porous carbon material was developed, improving the adsorption capacity of solid phase extraction columns and playing a crucial role in sample pretreatment.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
M. I. Sharipova, T. G. Baluyan, K. A. Abrashitova, G. E. Kulagin, A. K. Petrov, A. S. Chizhov, T. B. Shatalova, D. Chubich, D. A. Kolymagin, A. G. Vitukhnovsky, V. O. Bessonov, A. A. Fedyanin
Summary: Two-photon laser polymerization (TPP) is a cutting-edge technology for submicron-resolution 3D printing, and pyrolysis-high-temperature annealing of polymer objects may be a promising method to modify size and chemical composition, potentially becoming a standard post-processing technique for structures created via TPP.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Quentin Hanniet, Eddy Petit, Sylvie Calas-Etienne, Pascal Etienne, Karim Aissou, Christel Gervais, Philippe Miele, Benoit Charlot, Chrystelle Salameh
Summary: Non-oxide ceramic MEMS based on Si, C, N and B elements are important for high-temperature applications. However, structuring and patterning ceramics is challenging. In this study, SiBCN ceramic micro-components were designed for the first time using direct patterning of UV-curable boron-modified polyvinylsilazane resins. The microstructures showed good mechanical properties and have potential applications in MEMS.
MATERIALS & DESIGN
(2022)
Article
Engineering, Electrical & Electronic
Awatef Khlifi, Aftab Ahmed, Brahim Mezghani, Rajul Patkar, Pradeep Dixit, Fares Tounsi, Maryam Shojaei Baghini
Summary: This paper investigates the static and dynamic performances of a new enhanced design of 3-axis MEMS polymer piezoresistive accelerometer. The key geometric parameters are optimized using a developed numerical finite element model (FEM). The results show that the proposed design has improvements in induced stress fields compared to similar silicon-based designs found in literature. With a low-cost and simple fabrication process-flow provided, this design shows potential for practical applications.
MICROELECTRONICS JOURNAL
(2022)
Article
Chemistry, Analytical
Emil Ludvigsen, Nina Ritter Pedersen, Xiaolong Zhu, Rodolphe Marie, David M. A. Mackenzie, Jenny Emneus, Dirch Hjorth Petersen, Anders Kristensen, Stephan Sylvest Keller
Summary: Pyrolytic carbon microelectrodes (PCMEs) were successfully fabricated through the selective laser pyrolysis of SU-8 photoresist with added absorber Pro-Jet 800NP under inert nitrogen atmosphere. Higher laser power and lower scan speed led to higher electrical conductance of the carbon lines. Direct laser writing of adjacent lines with insulating gap down to ≤ 5 µm and seamless joining and intersecting of multiple lines allowed for more complex electrode designs.
Review
Biochemical Research Methods
Rodrigo Martinez-Duarte
Summary: Increasing the cross-sectional area of a channel can lead to higher flow rates and throughput, but the required electric field gradient decreases drastically as one moves away from the electrodes, requiring asymmetric scaling of the channel cross section.
Article
Materials Science, Biomaterials
Monsur Islam, Ahsana Sadaf, Milagros Ramos Gomez, Dario Mager, Jan G. Korvink, Andres Diaz Lantada
Summary: Multi-scale 3D carbon architectures play a crucial role in tissue engineering by allowing three-dimensional cell colonization essential for tissue growth. The hybrid structures, made of carbon fiber and microlattice, show improved compressive strength and flexibility, making them promising for soft-tissue regeneration. Additionally, these structures facilitate three-dimensional cell colonization, indicating their potential for future tissue repair applications.
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2021)
Review
Biochemical Research Methods
Gladys G. Diaz-Armas, Ana P. Cervantes-Gonzalez, Rodrigo Martinez-Duarte, Victor H. Perez-Gonzalez
Summary: This review focuses on the state-of-the-art electrical techniques and methods for manipulating and detecting exosomes in microfluidic devices. While there are numerous reviews on exosome separation using benchtop equipment like ultracentrifugation, there is a lack of reviews specifically addressing the use of electrical phenomena in microfluidic devices for exosome manipulation and detection. Highlights from the past decade and future perspectives for this research field are presented, outlining challenges to be addressed in the coming years.
Review
Engineering, Biomedical
Monsur Islam, Andres Diaz Lantada, Dario Mager, Jan G. Korvink
Summary: Carbon materials have great potential in the healthcare field, especially in tissue repair and regeneration. Challenges remain in designing carbon-based cell niches and scaffolds. By studying the role of carbon materials in regenerative medicine and related manufacturing strategies, further applications of carbon materials can be promoted. Understanding fundamental breakthroughs and future research trends is also necessary.
ADVANCED HEALTHCARE MATERIALS
(2022)
Article
Chemistry, Analytical
Kunal Mondal, Monsur Islam, Srujan Singh, Ashutosh Sharma
Summary: Carbon was used as a sacrificial template to produce zinc oxide (ZnO) porous nanostructures with a high specific surface area, which can have various applications including catalysis, photocatalysis, separation, sensing, solar energy harvest and energy storage.
Article
Chemistry, Analytical
Monsur Islam, Peter G. Weidler, Dario Mager, Jan G. Korvink, Rodrigo Martinez-Duarte
Summary: Carbon origami enables the fabrication of lightweight and mechanically stiff 3D complex architectures of carbonaceous materials. This study investigates the effect of precursor nature and microstructure on the material and structural properties of carbon origami structures using non-porous polyaramid Nomex sheets and macroporous fibril cellulose sheets as precursors.
Article
Chemistry, Analytical
Meltem Elitas, Monsur Islam, Jan G. Korvink, Esra Sengul, Pouya Sharbati, Beyzanur Ozogul, Sumeyra Vural Kaymaz
Summary: This study investigates the deformation and migration profile of glioma cells under the influence of dielectrophoretic forces, providing a rapid, robust, and sensitive method for quantifying membrane deformation of glioma cells to determine the state of the cells or efficacy of administrated drugs.
Review
Chemistry, Multidisciplinary
Yolita M. Eggeler, Ka Chun Chan, Qing Sun, Andres Diaz Lantada, Dario Mager, Ruth Schwaiger, Peter Gumbsch, Rasmus Schroeder, Wolfgang Wenzel, Jan G. Korvink, Monsur Islam
Summary: Additive micro/nano-manufacturing combined with pyrolysis allows for the design-controlled fabrication of complex 3D pyrolytic carbon structures. Pyrolysis results in significant shrinkage, creating structures with dimensions smaller than the resolution limit of additive manufacturing. Micro/nano-architected pyrolytic carbon exhibits exceptional properties and this article provides a comprehensive review of the manufacturing processes, properties, and applications, as well as addressing current challenges and future research directions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Engineering, Biomedical
Shrishti Kumari, Monsur Islam, Ankur Gupta
Summary: Multiplex detection is a smart approach in point-of-care testing, enabling simultaneous detection of multiple analytes or biomarkers. The use of inexpensive substrate like paper has significant potential in multiplexed analysis and offers unique advantages. This study presents the use of paper and strategies to enhance the sensitivity and specificity of multiplexed biosensors, along with an overview of different multiplexed detection studies using biological samples and the challenges and advantages they bring.
BIOMEDICAL MICRODEVICES
(2023)
Article
Chemistry, Multidisciplinary
Irene Wacker, Ronald Curticean, Daniel Ryklin, Britta Weidinger, Frederik Mayer, Li-Yu Huang, Julian Hoffmann, Monsur Islam, Nadine von Coelln, Tanja Schmitt, Christian Huck, Petra Tegeder, Florian Feist, Jochen A. Kammerer, Christopher Barner-Kowollik, Martin Wegener, Eva Blasco, Ulrich Gengenbach, Rasmus R. Schroder
Summary: With the rapid progress in additive manufacturing, there is a demand for nanoscale characterization of micro-patterned heterostructures of soft materials. Advanced function-structure relationships can be achieved through direct 3D structuring, which requires morphological and spectroscopical imaging at nanometer resolution. This article demonstrates the use of serial ultramicrotomy to access the interior of 3D objects and highlights the power of correlative imaging and spectroscopy techniques for understanding emerging functions from nanoscopic structuring of carbon-based materials in 3D.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qing Sun, Christian Dolle, Chantal Kurpiers, Kristian Kraft, Monsur Islam, Ruth Schwaiger, Peter Gumbsch, Yolita M. M. Eggeler
Summary: This study presents a novel in situ electron microscopy approach for investigating the shrinkage dynamics of 3D-printed nanoarchitectures during isothermal pyrolysis. The results reveal significant changes in the kinetic parameters and morphological textures of the 3D objects under different temperatures and atmospheric conditions. Understanding and controlling pyrolysis in 3D structures enables precise modification of shrinkage, creation of tensegrity structures, and promotes development of pyrolytic carbon with custom architectures and properties.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Gulshan Verma, Vikas Pandey, Monsur Islam, Mahesh Kumar, Ankur Gupta
Summary: In this research, La-ZnO/MWCNTs composites were successfully fabricated and loaded on a flexible polyimide substrate for room temperature CO gas detection. The synthesized composites exhibited significantly improved response compared to La-ZnO alone. The composite sensors also demonstrated humidity tolerant properties and excellent selectivity, making them suitable for trace level detection of CO gas in wearable devices.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
Monsur Islam, Christine Selhuber-Unkel, Jan G. Korvink, Andres Diaz Lantada
Summary: Engineered living materials (ELMs) are revolutionizing the field of materials science by generating next-generation advanced materials that outperform current smart, active, or multifunctional materials. Carbon materials are established as ideal counterparts to living cells in a hybrid living material system due to their excellent biocompatibility and unique functional properties. Hybrid living carbon materials (HLCMs) show exciting potential and can offer a variety of superior properties. This article reviews currently available examples of HLCMs, addresses current challenges, and proposes a methodology for HLCMs, emphasizing their revolutionary potential in various applications.
Article
Chemistry, Multidisciplinary
Andres Diaz Lantada, Jan G. Korvink, Monsur Islam
Summary: Engineered living materials (ELMs) are a revolutionary innovation in materials science and engineering, with unique properties such as autonomy, intelligent responses, self-repair, and even self-replication. This study presents the first complete proposal of taxonomy for ELMs, illustrating its applicability and utility in guiding research in this field.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Proceedings Paper
Engineering, Manufacturing
J. Bentley Bevis, Shane Dunlavey, R. Martinez-Duarte
Summary: Porous tungsten carbide (WC) offers high strength and electroconductivity for lightweight structures, with robocasting used to print geometries using paste featuring a biopolymer and tungsten oxide nanoparticles. The new robocasting system provides consistent flow, improving print quality and allowing for further experimentation on drying and carbonization processes. This advances the potential of manufacturing porous WC SECs.
49TH SME NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE (NAMRC 49, 2021)
(2021)
Article
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)
