Article
Chemistry, Multidisciplinary
Arnaud Valour, Marion Hochedel, Maxime Royon, Maria Alejandro Usuga Higuita, Nicolas Crespo-Monteiro, Yves Jourlin
Summary: This paper describes a tailored and versatile technology route to achieve micro and nanopatterning of both TiO2 and TiN thin films using a direct photo patternable sol-gel approach combined with a rapid thermal annealing and nitridation process. The approach demonstrates the versatility and compatibility of the process with various substrates, while preserving the diffractive properties and high thermal stability of the thin films.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yiliu Wang, Chuancheng Jia, Zheng Fan, Zhaoyang Lin, Sung-Joon Lee, Timothy L. Atallah, Justin R. Caram, Yu Huang, Xiangfeng Duan
Summary: This study demonstrates a method for growing large-area CsPbBr3 perovskite monocrystalline thin films and forming heterostructure arrays, exhibiting excellent optical quality and optoelectronic properties, laying a solid foundation for the application of all-inorganic lead halide perovskites in optoelectronics.
Article
Mechanics
Ali Mohammadtabar, Hadi Nazaripoor, Adham Riad, Arman Hemmati, Mohtada Sadrzadeh
Summary: This study investigates the pattern formation in shear thinning and shear thickening liquid films induced by thermal effects using linear and nonlinear analyses. The results show that rheological properties influence the timescale and characteristics of the formed features.
Article
Biochemical Research Methods
Myungjin Seo, Sungmin Park, Junghwan Ryu, Sung Jae Kim
Summary: In this study, an economic and feasible nanofabrication method was proposed to pattern thin arbitrarily-shaped nanoporous films and integrate them into micro/nanofluidic platforms. The results showed that the presented adhesive lift method can provide platforms that nearly mimic practical macro-scale fluidic systems and can be useful for studying various electrokinetic phenomena.
Article
Engineering, Biomedical
Sergio Rius-Rocabert, Javier Arranz-Herrero, Adolfo Fernandez-Valdes, Marzia Marciello, Sandra Moreno, Francisco Llinares-Pinel, Jesus Presa, Ruben Hernandez-Alcoceba, Roberto Lopez-Piriz, Ramon Torrecillas, Antonia Garcia, Alejandro Brun, Marco Filice, Jose S. Moya, Belen Cabal, Estanislao Nistal-Villan
Summary: Inorganic materials can be utilized to decontaminate various substances containing viral particles and provide effective disinfection and antiviral solutions. Novel soda-lime glass and kaolin containing metal nanoparticles show strong antiviral properties, demonstrating potent virucidal activity against multiple viruses.
MATERIALS TODAY BIO
(2022)
Review
Chemistry, Analytical
Seokwon Joo, Jung Yeon Han, Soonmin Seo, Ju-Hyung Kim
Summary: Rapid technological advancements have increased the demand for sensors, requiring high-performance capabilities for next-generation technology. Various materials and patterning methods are used in sensor fabrication to meet the wide range of sensing applications. In this paper, we review the patterning techniques used in recently reported sensors, particularly the widely used capacitive sensors, and discuss their impact on sensor performance. Additionally, we introduce a method for enhancing sensor performance through three-dimensional (3D) structures.
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
Materials Science, Multidisciplinary
Shadia J. Ikhmayies
Summary: Coral-like micro/nano zinc oxide thin films were successfully synthesized on glass substrates using a low-cost spray pyrolysis method. The films exhibited polycrystalline structure with hexagonal (wurtzite) structure and contained Cl in addition to Zn and O. The non-catalyst production method may have potential applications in nanoelectronic devices, optoelectronics, sensors, nanoscale mechanics research, and solar cells.
Article
Chemistry, Multidisciplinary
Junhyuk Ahn, Sanghyun Jeon, Ho Kun Woo, Junsung Bang, Yong Min Lee, Steven J. Neuhaus, Woo Seok Lee, Taesung Park, Sang Yeop Lee, Byung Ku Jung, Hyungmok Joh, Mingi Seong, Ji-hyuk Choi, Ho Gyu Yoon, Cherie R. Kagan, Soong Ju Oh
Summary: A one-step, ink-lithography technique has been developed to pattern and engineer thin films of colloidal nanocrystals, allowing modification of both the chemical nature of the nanocrystal surface and the physical properties of the thin films. This method has been successfully applied to engineer thin films of metals, semiconductors, and insulators for various applications.
Article
Engineering, Environmental
Chao Yang, Suihan Cui, Yuchang Weng, Zhongcan Wu, Liangliang Liu, Zhengyong Ma, Xiubo Tian, Ricky K. Y. Fu, Paul K. Chu, Zhongzhen Wu
Summary: Utilizing plasma electrolytic oxidation (PEO) technique to prepare superhydrophobic inorganic alumina coatings with T-shape micro/nano structures in a single step without organic modification. The coatings exhibit excellent heat resistance, corrosion resistance, and superhydrophobicity, showing potential applications in various fields due to their simplicity, economy, and robust performance under different environmental conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Mingming Cui, Hu Huang, Lin Zhang, Jiwang Yan
Summary: In this study, a new nanosecond laser pulling method is proposed to fabricate micro-nano structures on metallic glasses. The formation mechanism and evolution of the micro-nano bulge are investigated, and various micro-nano structures are successfully created on the MG surface, affecting the surface optical diffraction. Overall, this study provides a highly flexible and controllable method for the fabrication of micro-nano structures on MGs.
Article
Multidisciplinary Sciences
Seung Woo Lee, Heyjin Cho, Choel-Min Jang, Myung-Soo Huh, Sung Min Cho
Summary: A simple sidewall patterning process for organic-inorganic multilayer thin-film encapsulation (TFE) has been proposed and demonstrated. The process involves adhesion lithography on an Al2O3 thin film grown by atomic layer deposition (ALD) using a self-assembled monolayer (SAM) pattern formed by a shadow mask. Sidewall patterning of multilayer TFE was achieved by repeating the adhesion lithography and vapor deposition of organic polymer and SAM patterns. The proposed process allows for the accurate patterning of blanket ALD-grown Al2O3 thin films using a predefined SAM pattern with a shadow mask.
SCIENTIFIC REPORTS
(2023)
Review
Chemistry, Multidisciplinary
Guowei Lv, Hongmiao Tian, Jinyou Shao, Demei Yu
Summary: This paper reviews a recent patterning technique called electrohydrodynamic patterning (EHDP), which uses an externally applied electric field to create micro-/nano-patterns on thin polymeric films. The theoretical and numerical studies of EHDP are presented, as well as the discussion on how the characteristic wavelength and time are influenced by external conditions and polymer properties. Various strategies for fabricating high-aspect-ratio or hierarchical patterns are reviewed, with emphasis on aligning and ordering of anisotropic polymers. The paper also provides a perspective on the novelty and limitations of EHDP compared to conventional patterning techniques, and suggests possible future research directions.
Article
Materials Science, Multidisciplinary
Ju Hwan Lee, Dong Hyun Kim, Jonghoon Won, Dong Wook Lee, Jin Young Oh, Yang Liu, Yong-Pil Park, Hae-Chang Jeong, Dae-Shik Seo
Summary: The study successfully fabricated high-resolution 1-D nanostructures on a thin film using a hybrid mixture of tin oxide and a UV-curable polymer through UV nanoimprint lithography (NIL). These nanostructures were applied to liquid crystal (LC) devices as alignment layers, achieving uniform and homogeneous LC alignment with strong potential for high-quality LC applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Optics
Bing Dong, Zongwei Xu, Changkun Shi, Kun Zhang, Yuheng Zhang, Rushuai Hua, Wei Zhao, Jianshi Wang
Summary: In this study, a method for fabricating high-quality micro-nanostructures of 4H-SiC using vector polarized light was proposed. The influences of linear polarization and vector polarization on the quality and surface morphology of processed SiC microgrooves were studied. The study showed that using vector beam, especially azimuthal polarization beam, can ensure the uniformity of the processing area, reduce micro-cracks and obtain better processing quality.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Kyusung Kim, Pil Gyu Choi, Toshio Itoh, Yoshitake Masuda
Summary: Atomic defects can enhance the catalytic efficiency of metal oxides, making chemical reactions easier. In this study, porous ZnO nanobelts with atomic step structures were fabricated for ultrasensitive gas sensing of acetone, ethanol, and isoprene at the parts-per-billion level.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yoshitake Masuda
Summary: Cold crystallization and morphology control have been achieved for ZnO nanostructures, which can be used in various devices such as sensors, batteries, and catalysts.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Pil Gyu Choi, Yoshitake Masuda
Summary: Mental stress management is crucial for human health as excessive and sustained mental stress can cause harm. This study focuses on allyl mercaptan, a biomarker associated with mental stress, and utilizes a nanosheet-type tin oxide gas sensor array to detect it. Gas classification models are built using supervised learning algorithms and principal component analysis, providing accurate forecasts for allyl mercaptan.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Ceramics
Kim Kyusung, Chunyan Li, Pil Gyu Choi, Toshio Itoh, Yoshitake Masuda
Summary: A simple synthesis method of freestanding Zinc hydroxidefluoride (ZnOHF) nanobelt as 1D material without seed or substrate using aqueous solutions was introduced in this study. The growth direction of the nanobelt can be controlled by the concentration of HMT, with lower HMT concentration resulting in broader nanobelt width.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2022)
Article
Nanoscience & Nanotechnology
Takuma Ema, Pil Gyu Choi, Seiichi Takami, Yoshitake Masuda
Summary: CeO2 nanocubes and nanooctahedrons with different facets were fabricated by controlling the morphology of CeO2 nanoparticles. The gas sensors based on these CeO2 nanoparticles exhibited enhanced sensing performance to various chemical species and show potential for disease diagnosis.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jidapa Chantaramethakul, Nicha Choophun, Chayanaphat Chokradjaroen, Anyarat Watthanaphanit, Nagahiro Saito, Gasidit Panomsuwan
Summary: Morphological control of gold nanoparticles (AuNPs) synthesized via solution plasma sputtering (SPS) in sodium chloride (NaCl) solutions has been investigated. The size, distribution, and stability of AuNPs were examined over 30 days of storage. The results show that the NaCl concentration and storage time critically influence the morphological evolution and stability of AuNPs. High NaCl concentration leads to coalescence and sedimentation of AuNPs. Additionally, oxidative etching affects the size and distribution of AuNPs, with larger particles observed at higher NaCl concentrations.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Ceramics
Kyusung Kim, Pil Gyu Choi, Toshio Itoh, Yoshitake Masuda
Summary: By changing the supply rate of hydroxide ions, we can control the morphology of ZnO nanomaterial and improve the sensitivity of metal-oxide-semiconductor gas sensors.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Analytical
Jae-Hun Kim, Isao Sakaguchi, Shunich Hishita, Takeo Ohsawa, Taku T. Suzuki, Noriko Saito
Summary: In this study, Sb ions were implanted into p-type tungsten disulfide nanosheets and their gas-sensing properties for CO gas were investigated. Sb5+ ions dominated and acted as donors, changing the conductivity of WS2 from p-type to n-type. The highest response to CO gas was achieved with 2 x 1013 Sb ions/cm2 implantation and annealing at 500 degrees C. Au nanoparticles were then decorated on the optimal gas sensor surface to improve its response. The enhanced gas performance was attributed to increased O ionosorption, formation of Au/Sb-WS2 heterojunctions, and the catalytic effect of Au nanoparticles.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Krishnaprasanth Alageshwaramoorthy, Pandian Mannu, Seetha Mahalingam, Ta Thi Thuy Nga, Han-Wei Chang, Yoshitake Masuda, Chung-Li Dong
Summary: In this study, the novel CuTa2O6 phase was synthesized by hydrothermal and calcination processes. X-ray diffraction confirmed the presence of different phases, with a phase transition to cubic crystal structure at high temperatures. Optical studies and FESEM images provided further characterization of the material. The photocatalytic activity of CuTa2O6 was evaluated for the degradation of MO dye and showed promising results.
FRONTIERS IN CHEMISTRY
(2023)
Article
Chemistry, Physical
Junmo Moon, Hojung Yun, Junzo Ukai, Chayanaphat Chokradjaroen, Satita Thiangtham, Takeshi Hashimoto, Kyusung Kim, Yasuyuki Sawada, Nagahiro Saito
Summary: This study investigates the factors affecting the specific capacity and electrical conductivity of carbon materials used in Li-ion batteries for electric vehicles. Correlation analysis and descriptor vectors were used to examine the intercalation of Li ions and the number of graphene layers on the surface, which were found to have significant impacts on the capacity and conductivity. The study proposes correlation equations based on these findings and validates their effectiveness using experimental data and statistical methods. A candidate structure for improving battery performance is also proposed.
Article
Chemistry, Physical
Pil Gyu Choi, Yoshitake Masuda
Summary: A thin film of nanosheet-type tin oxide (SnO2) was synthesized on a sensor chip using an aqueous solution process. Au-Pd was then loaded onto the film's surface through ion sputtering. The sensor signal response of the Au-Pd loaded tin oxide to hydrogen was higher than that of the bare tin oxide, while its response to methane gas decreased. The designed nanosheet has potential applications as a hydrogen sensor array.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Chunyan Li, Pil Gyu Choi, Yoshitake Masuda
Summary: Gas sensors with high sensitivity and selectivity are crucial for practical applications, such as distinguishing target molecules in volatile organic compound detection, real-time security alerts, and clinical diagnostics. In this study, a large-lateral-area SnO2 nanosheet sensor was successfully synthesized via a one-step aqueous solution process. The SnO2 sensor exhibited remarkable sensitivity and anti-interference ability towards acetone, with excellent reproducibility and long-term stability. The ultrasensitive response of the SnO2 nanosheets can be attributed to their specific loose structure, small grain size, and metastable crystal facets.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Seulgee Lee, Chayanaphat Chokradjaroen, Yasuyuki Sawada, Nagahiro Saito
Summary: Ternary and quaternary composites of Mg-Al-Ti and Mg-Al-Ti-Cu systems were successfully prepared using mechanical alloying and spark plasma sintering. The optimized process resulted in uniform composite microstructure, and the addition of Cu significantly improved the hardness.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Analytical
Toshio Itoh, Yutaro Koyama, Yuichi Sakumura, Takafumi Akamatsu, Akihiro Tsuruta, Yoshitake Masuda, Woosuck Shin
Summary: We investigated the discriminant method for identifying volatile organic compounds (VOCs) in exhaled breath under both contaminated and purified air conditions using multiple semiconductive gas sensors and linear discriminant analysis (LDA) technique. Our developed discriminant method was used to analyze the resistance changes in sensor signals in the LDA space. The target gases were discriminated based on the angle of the locus of the test data in the 2-D LDA space. Our results demonstrated the feasibility of this method in discriminating target gases under contaminated air conditions.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Myo Myo Thu, Nattapat Chaiammart, Oratai Jongprateep, Ratchatee Techapiesancharoenkij, Aye Aye Thant, Nagahiro Saito, Gasidit Panomsuwan
Summary: Carbon nanoparticles synthesized via solution plasma process were thermally treated at different temperatures to introduce micropores and adjust pore structures for supercapacitor applications. The treatment temperature significantly affected the specific surface area and oxygen content of the nanoparticles. The charge storage properties were evaluated, and the nanoparticles treated at high temperatures showed improved cycling stability.
