Article
Engineering, Multidisciplinary
Rocio Gimenez, Camilo Perez-Sosa, Natalia Bourguignon, Santiago Miriuka, Shekhar Bhansali, Carlos R. Arroyo, Alexis Debut, Betiana Lerner, Maximiliano S. Perez
Summary: Microcontact printing using grayscale patterns is proposed and demonstrated in this work, which allows for the generation of different microprint pattern structures by adjusting the layout and grayscale of the stamp patterns. The functionality of this method is validated by generating specific micropatterns for complex cell differentiation. The new technique of microfabrication provides a promising alternative to conventional lithography for constructing complex aligned surfaces.
Article
Biophysics
Xingyu Meng, Ping Guo, Jian Li, Haikang Huang, Zeqi Li, Hailong Yan, Zonglin Chu, Yi-Ge Zhou
Summary: In this work, a versatile and tunable platform for constructing various cell array biochips was developed using a simple soft lithographic approach. The platform utilizes a microcontact printing technique to pattern polydopamine (PDA) arrays. By printing dopamine monomers on the substrate and facilitating self-oxidative polymerization with ammonia vapor, PDA growth is achieved in situ, reducing the reaction time and preventing damage to the polydimethylsiloxane (PDMS) tips. The resulting cell array chips demonstrate high single cell capture efficiency, excellent cell viability and proliferation, and the capability for cytotoxicity sensing at single-cell resolution.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Physical
Anjana Wijesekara, Marc Walker, Yisong Han, Ross Hatton
Summary: A novel transparent copper-based grid electrode fabricated by microcontact printing shows high stability towards oxidation in air, with passivation achieved through a 2.5 nm thick layer of nickel. This approach retains the advantages of fast resist deposition and compatibility with low cost etchants, with the process of resist deposition and metal etching completed in less than 1 minute. The grid electrode demonstrates high transparency and low sheet resistance, making it a promising alternative to indium-tin oxide in perovskite photovoltaic devices.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Mechanical
Yixing Zhang, Taiping Lu, Jinsheng Zhao, Jun Ai, Yihao Chen, Mingxing Shi, Yinji Ma, Xue Feng
Summary: Transfer printing technology is an effective solution for manufacturing flexible electronic devices by picking film components from one substrate to another. This research proposes the use of elastomeric stamps with cavities to control adhesion without external stimuli. A theoretical model based on the energy method is presented to analyze the mechanism of cavity stamp adhesion. The results can guide the optimization of stamp design for transfer printing.
EXTREME MECHANICS LETTERS
(2023)
Article
Engineering, Mechanical
Byoung-Joo Lee, Dahl-Young Khang
Summary: The non-deterministic transfer printing of LED chips with controllable pitch has been successfully demonstrated, reducing the transfer frequency compared to deterministic techniques. Optimized stamp design and strain analysis have been utilized to protect chip arrangement on the stamp under significant stretching, leading to the successful implementation of stretchable LED arrays. This technique may enhance the productivity of LED-based displays.
EXTREME MECHANICS LETTERS
(2021)
Article
Biochemistry & Molecular Biology
Masamichi Nakayama, Yuki Toyoshima, Akihiko Kikuchi, Teruo Okano
Summary: This study proposes a facile preparation method of micropatterned thermoresponsive surfaces by physically coating two different diblock copolymers. The method involves constructing thermoresponsive polymer layers on cell culture dishes and creating polymer micropatterns using microcontact printing, providing a useful technique for various biomedical applications.
MACROMOLECULAR BIOSCIENCE
(2021)
Article
Chemistry, Analytical
Hongying Li, Haina Zhang, Wei Luo, Ruo Yuan, Yingqi Zhao, Jian-An Huang, Xia Yang
Summary: The rigidity of traditional solid-state SERS substrates hampers their application, so this study prepares a low-cost and flexible SERS substrate using microcontact printing technology. Combined with an amplification method, a highly sensitive SERS biosensor is constructed, and the flexibility of the substrate is maintained even after repeated bending.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Physical
Philip Bellchambers, Silvia Varagnolo, Corinne Maltby, Ross A. Hatton
Summary: This study introduces high-performance transparent copper grid electrodes that outperform conventional indium tin oxide electrodes for organic photovoltaic (OPV) applications. The fabrication method is cost-effective and efficient, with a faster process compared to conventional lithography. The ultra-narrow grid line spacing minimizes parasitic absorption losses, making it a promising solution for OPV devices.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Wataru Kubota, Ryoya Yamaoka, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura
Summary: The vapor-phase etching assisted by graphene oxide enhances the etching reaction without the formation of a porous layer, and microcontact printing of graphene oxide can be combined with silicon etching to form micrometer-sized pores in desired areas.
ACS APPLIED NANO MATERIALS
(2022)
Article
Mechanics
Jumpei Kajimoto, Jun Koyanagi, Yusuke Maruyama, Hideyuki Kajita, Ryosuke Matsuzaki
Summary: An improved mechanism was developed to automatically embed carbon fiber reinforced polymer (CFRP) and epoxy resin in a 3D printed structure, resulting in increased interlaminar tensile strength.
COMPOSITE STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Joanna Zemla, Renata Szydlak, Katarzyna Gajos, Lukasz Kozlowski, Tomasz Zielinski, Marcin Luty, Ingrid H. Ovreeide, Victorien E. Prot, Bjorn T. Stokke, Malgorzata Lekka
Summary: This study investigates the transfer of silicone and its impact on cell adhesion during microcontact printing. The results show that silicone contamination inhibits cell adhesion and microcontact printed lectins have lower adhesion compared to drop-cast lectins. Treatment of PDMS stamps with ozone reduces silicone contamination during the imprinting protocol.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Woo Ri Chae, Nae Yoon Lee
Summary: This study demonstrates a robust and universally applicable polydopamine (PDA) contact-printing technique that can be easily performed on various substrates without the need for expensive equipment. The use of a wet elastomeric stamp significantly increases the patterning efficiency, and the hydration layer formed reduces mechanical stress and enhances the contact between the stamp and the substrate.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Gibin Chacko George, J. J. U. Buch, Prince A. Amalin, Surya K. Pathak
Summary: This article discusses the design and development of a compact FMCW Reflectometry diagnostic instrument, proposing an SoC-based ARDI to integrate all necessary electronic components into a single instrument for remote configuration and monitoring.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Electrical & Electronic
Christopher A. A. Bower, Brook Raymond, Christopher Verreen, Carl Prevatte, Salvatore Bonafede, Andrew Pearson, Nathan Rivers, Benjamin Keller, Tiffany Weeks, Brandon Trinh, Erik Vick, Erich Radauscher, Nikhil Jain, Miroslav Samarskiy, Matthew A. Meitl
Summary: This paper reviews the application of transfer printing in the development of microLED displays and describes a pixel-driver microIC with vertically integrated microLEDs, which enables assembly onto passive wiring panels to realize displays.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Roland Hager, Christian Forsich, Jiri Duchoslav, Christoph Burgstaller, David Stifter, Julian Weghuber, Peter Lanzerstorfer
Summary: Polymeric materials have emerged as important components in biosensing interfaces, providing superior surfaces for biomolecule binding and printing. This study characterized 11 different polymer foils and evaluated their suitability for surface functionalization, biomolecule micropatterning, and fluorescence microscopy. Results showed that COC, COP, and PMMA were the most promising alternatives to glass coverslips, demonstrating excellent applicability in subcellular micropatterning experiments.
ACS APPLIED POLYMER MATERIALS
(2022)