Article
Nanoscience & Nanotechnology
Qi Song, Zhiwen Zhou, Gangyi Zhu, Huawei Liang, Min Zhang, Bingyuan Zhang, Fang Liu, Peiguang Yan
Summary: This study demonstrates a high-performance terahertz wave detector based on a microdisk array and Weyl semimetal surface plasmon enhancement. The detector shows improved sensitivity and responsivity, making it suitable for various applications such as high capacity communications, security, biological diagnosis, spectroscopy, and remote sensing.
Article
Polymer Science
Hiroshi Yamagishi, Tokiya Matsui, Yusuke Kitayama, Yusuke Aikyo, Liang Tong, Junpei Kuwabara, Takaki Kanbara, Masakazu Morimoto, Masahiro Irie, Yohei Yamamoto
Summary: This study developed a facile method in which organic and polymeric fluorescent dyes spontaneously aggregate to form a patterned microarray, allowing for the deposition of minute light emitters into a regular array. By using a quartz substrate prepatterned with regular hydrophilic boxes and hydrophobic grids, arrayed microaggregates can cover the entire substrate surface, making it applicable for optical memories and displays.
Review
Biochemical Research Methods
Nicolette Driscoll, Royce Dong, Flavia Vitale
Summary: Devices that record or modulate neural activity are crucial for clinical diagnostics, research, and consumer electronics. The development of stable interfaces between electronics and biological tissues is a significant challenge that requires material innovations. Nanocarbons and carbides offer specific advantages for neuroelectronics, enabling safe and precise interactions at various scales.
CURRENT OPINION IN BIOTECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
S. N. Vijayaraghavan, Jacob Wall, Wenjun Xiang, Kausar Khawaja, Lin Li, Kai Zhu, Joseph J. Berry, Feng Yan
Summary: This study reports a simple and effective sputtered gold nanoparticle-decorated carbon electrode for fabricating efficient and stable planar perovskite solar cells (PSCs). The power conversion efficiency (PCE) of the composite electrode-based PSC reached 16.87% by optimizing the gold thickness, while the reference device achieved a PCE of 12.38%. After being stored for 100 hours under humid conditions (50-60%) without encapsulation, the composite electrode-based device demonstrated a 96% performance retention. This demonstrates a promising pathway towards the commercialization of large-scale manufacturable sputtered electrodes for PSC solar modules.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Wen-Qi Wei, An He, Bo Yang, Zi-Hao Wang, Jing-Zhi Huang, Dong Han, Ming Ming, Xuhan Guo, Yikai Su, Jian-Jun Zhang, Ting Wang
Summary: This article introduces an embedded InAs/GaAs quantum dot (QD) laser directly grown on a SOI substrate, enabling monolithic integration with silicon waveguides. By resolving the epitaxy and fabrication challenges, embedded III-V lasers on SOI with continuous-wave lasing are obtained, providing a scalable and low-cost epitaxial method for future high-density photonic integration.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Engineering, Biomedical
Tianshu Dong, Lei Chen, Paras R. Patel, Julianna M. Richie, Cynthia A. Chestek, Albert J. Shih
Summary: The machine described in this study automates the assembly of high-density carbon fiber (HDCF) arrays, eliminating the need for manual labor and improving accuracy and repeatability. The machine includes a roller-based carbon fiber extruder, a motion system with linear and rotary stages, an imaging system with digital microscope cameras, and a laser cutter. It is capable of precisely handling carbon fiber electrodes (CFEs) and accurately placing them on silicon support shanks. The use of this machine is significant for achieving fully automated HDCF array assembly and batch production.
JOURNAL OF NEURAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Mohammad Sadeq Saleh, Sandra M. Ritchie, Mark A. Nicholas, Hailey L. Gordon, Chunshan Hu, Sanjida Jahan, Bin Yuan, Rriddhiman Bezbaruah, Jay W. Reddy, Zabir Ahmed, Maysamreza Chamanzar, Eric A. Yttri, Rahul P. Panat
Summary: Researchers have developed customizable and physically robust 3D multi-electrode devices using a 3D nanoparticle printing approach, allowing efficient recording and analysis of electrophysiological activity in the brain.
Article
Engineering, Electrical & Electronic
Bavatharani Chokkiah, Muthusankar Eswaran, Asma A. Alothman, Mohammed Alsawat, Ahmad A. Ifseisi, Khadraa N. Alqahtani, Ragupathy Dhanusuraman
Summary: The study successfully prepared GCE/PANi-CNF-Pt electrocatalyst, with the wrapping of PANi with CNF and Pt NPs facilitated by p-p and electrostatic bonding for efficient and rapid electron transfer. The nanocomposite exhibited excellent electrocatalytic properties and holds promise for potential applications in DMFCs.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Analytical
Min Liu, Jia Yang, Juan Wang, Zhihong Liu, Chengguo Hu
Summary: This study presents a light-addressable paper-based photoelectrochemical (PEC) analytical device for on-site high-throughput biosensing. The device consists of a solar cell-type single-channel PEC system with separated detection zones, and can be produced in large quantities using a simple method. By taking advantage of the sensitive photocurrent response, an AChE-based PEC biosensing system for the on-site screening of ultratrace pesticides was established.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yanmin Wang, Chong Sun, Hu Zhao, Jinlong Cui, Yongqiang Zhang, Wenxiu He
Summary: Metal sulfides as supercapacitor electrode materials have large theoretical capacity and rich operability, but their unsatisfactory cycle stability and rate performance are challenging problems. Therefore, the effective strategy to solve these problems is the preparation of metal sulfide-based electrode materials with a stable structure, long cycle life, and high-rate performance. In this study, metal sulfides were first crystallized into crosslinked nanosheet and nanotube structures, providing abundant active sites for redox reactions. Further modification of the prepared material by spraying graphene resulted in a more complete hollow structure, enlarged electrochemical reaction sites, and reduced electrolyte transport distance, thereby improving the charge transfer kinetics. The electrode material underwent a self-activation process during the charge-discharge cycle test, transforming it from one equilibrium state to a new equilibrium state. The 2-CSNS@RGO electrode showed a capacitance of 1650.13 C g(-1) at 1 A g(-1) with remarkable cycling of 3000 cycles at 10 A g(-1), retaining 186.1% capacity of the initial value. An asymmetric supercapacitor (2-CSNS@RGO//AC) was prepared using 2-CSNS@RGO as the positive electrode and activated carbon (AC) as the negative electrode, exhibiting an energy density of 88 W h kg(-1) at a power density of 0.8 kW kg(-1) and a capacity retention rate of 131.6% after 30,000 cycles at 10 A g(-1).
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Analytical
Szu-Ying Li, Hsin-Yi Tseng, Bo-Wei Chen, Yu-Chun Lo, Huai-Hsuan Shao, Yen-Ting Wu, Ssu-Ju Li, Ching-Wen Chang, Ta-Chung Liu, Fu-Yu Hsieh, Yi Yang, Yan-Bo Lai, Po-Chun Chen, You-Yin Chen
Summary: Increasing requirements for neural implantation have led to advancements in semiconductor technologies, allowing for high-density electrode arrays to improve neural recordings. However, there are technological challenges, such as complex manufacturing processes and environmental concerns. A new eco-fabrication process for neural electrode arrays reduces carbon emissions and offers customization.
Article
Engineering, Electrical & Electronic
Xin Tang, Hao Shen, Siyuan Zhao, Na Li, Jia Liu
Summary: Flexible electronics have potential applications in the development of brain-computer interfaces, addressing the limitations of traditional rigid electronics. They offer unique advantages in terms of flexibility, stretchability, and softness, impacting neuroscience, neuroprosthetic control, bioelectronic medicine, and brain and machine intelligence integration. Challenges regarding materials, device fabrication, and system integration need to be addressed to develop flexible brain-computer interfaces with broad applicability.
NATURE ELECTRONICS
(2023)
Article
Chemistry, Physical
Sedigheh Khorrambin, Shahram Ghasemi, Sayed Reza Hosseini
Summary: The research synthesized nanostructured MoS2/g-C3N4 through sonochemical method, which exhibited high catalytic activity and low charge transfer resistance in DSSC. The hybrid material showed potential for improving the performance of dye-sensitized solar cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Ruiqi Li, Jiaxiang Tian, Wencong Wu, Qiang Wang, Chunhong Zhang, Changqing Zhou, Lixue Yang
Summary: In this study, polyaniline (PANI) was coated on CuS @ functional carbon cloth (fCC) using a facile polymerization procedure to address the inherent defects of CuS, enhancing the electrochemical performance of the free-standing electrode.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Analytical
Rebecca B. Clark, Matthew W. Glasscott, Matthew D. Verber, Jenna C. DeMartino, Anton Netchaev, Jason D. Ray, Eric W. Brown, Erik Alberts, P. U. Ashvin Iresh Fernando, Lee C. Moores, Jeffrey E. Dick
Summary: Three different potentiostat architectures for electrochemical measurements are discussed, with a focus on the advantages of using a multiplexer interface. A strategy for developing flexible printed circuit (FPC) electrode arrays for single-channel potentiostats is presented, along with experimental results. The FPC array is interfaced with commercial potentiostats using a simple connector and multiplexers, demonstrating reliability, stability, and reproducibility.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Shunsuke Shiba, Rina Maruyama, Tomoyuki Kamata, Dai Kato, Osamu Niwa
Article
Chemistry, Analytical
Sima Chaudhari, Tomoyuki Kamata, Naoshi Kojima, Michinori Sumimoto, Kapaettu Satyamoorthy, Ryoji Kurita, Dai Kato
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Chemistry, Analytical
Hinako Hashimoto, Kyosei Goto, Kouhei Sakata, Satoshi Watanabe, Tomoyuki Kamata, Dai Kato, Osamu Niwa, Eisuke Kuraya, Taisei Nishimi, Mitsunobu Takemoto, Masashi Kunitake
ANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Dai Kato, Tomoyuki Kamata, Michinori Sumimoto
Summary: By studying nanocarbon film electrodes, we successfully detected tryptophan metabolites, particularly kynurenic acid (KYNA), due to the superior electrode properties and unique structure of the nanocarbon film. The sp(2)/sp(3) ratio of the nanocarbon film plays a crucial role in electrode activity, potential window, and electrode performance, with nanocarbon films containing high sp(3) content exhibiting better performance and theoretical oxidation potential values matching experimental results.
Article
Chemistry, Analytical
Dai Kato, Johtaro Yamamoto, Yoshio Suzuki, Tomoyuki Kamata, Hinako Hashimoto, Masashi Kunitake
Summary: The study investigated the diffusion properties of lipophilic vitamin E through bicontinuous microemulsions (BME) using electrochemical and fluorescence correlation spectroscopy (FCS) measurements. Results showed that a higher VE diffusion coefficient and faster diffusion were observed in the oil-rich BME, indicating superior electrochemical measurements can be achieved by controlling the conditions of the BME as the measurement electrolyte.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Shunsuke Shiba, Ayaka Koike, Shota Takahashi, Dai Kato, Tomoyuki Kamata, Osamu Niwa
Summary: A method for the synthesis of highly oriented metallic heterodimer arrays on a metal nanoparticle-embedded carbon film using a selective electrodeposition technique is proposed. This method does not require the use of surfactants, capping agents, organic solvents, or heat treatment. Selective electrodeposition is achieved by utilizing the difference in electrodeposition overpotentials between carbon and Pd nanoparticle surfaces.
Article
Electrochemistry
Shunsuke Shiba, Soichiro Yoshimoto, Shunta Hashiguchi, Masashi Kunitake, Dai Kato, Osamu Niwa, Masanobu Matsuguchi
Summary: This study reports a method of preparing porous gold nanomesh film through gold electrodeposition in a bicontinuous microemulsion. Toluene selectively adsorbs on the Au surface, inducing anisotropic 2D growth of gold, and the nanochannels in the microemulsion form abundant in-plane nanopores.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Kodai Nakao, Koji Noda, Hinako Hashimoto, Mayuki Nakagawa, Taisei Nishimi, Akihiro Ohira, Yukari Sato, Dai Kato, Tomoyuki Kamata, Osamu Niwa, Masashi Kunitake
Summary: Bicontinuous microemulsions (BMEs) have been investigated as unique heterogeneous mixtures for electrochemistry. A three-dimensionally expanded ITIES-BME system was successfully constructed, and electrochemical reactions were observed to occur in both immiscible solution phases. This research opens up possibilities for applications such as electrolysis synthesis and secondary batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Shunsuke Shiba, Saki Ohta, Kazuya Ohtani, Shota Takahashi, Dai Kato, Osamu Niwa
Summary: The supporting effect of N-doped carbon film improved the crystallinity of electrodeposited Ni@Ni(OH)(2) core-shell nanoparticles, leading to a higher regeneration rate of catalytic sites and oxidation currents of sugars, as well as a significant decrease in overpotential for the G5 oxidation reaction, possibly due to electrostatic interaction between NPs and G5.
Article
Nanoscience & Nanotechnology
Shunsuke Shiba, Shoei Hirabayashi, Osamu Niwa, Dai Kato, Masashi Kunitake, Masanobu Matsuguchi
ACS APPLIED NANO MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Tomoyuki Kamata, Michinori Sumimoto, Shunsuke Shiba, Ryoji Kurita, Osamu Niwa, Dai Kato
Article
Chemistry, Multidisciplinary
Tomoyuki Kamata, Dai Kato, Osamu Niwa
Article
Nanoscience & Nanotechnology
Dai Kato, Yoshio Suzuki, Kyoko Yoshioka, Tomoyuki Kamata, Masami Todokoro, Osamu Niwa
ACS APPLIED NANO MATERIALS
(2018)
Article
Chemistry, Analytical
Ryoji Kurita, Hiroyuki Yanagisawa, Tomoyuki Kamata, Dai Kato, Osamu Niwa
ANALYTICAL CHEMISTRY
(2017)
Article
Chemistry, Analytical
Dai Kato, Tomoyuki Kamata, Ryoji Kurita, Kyoko Yoshioka, Shunsuke Shiba, Eisuke Kuraya, Masashi Kunitake, Osamu Niwa
