Article
Multidisciplinary Sciences
Hyeonaug Hong, Jang Mee Lee, JaeHyoung Yun, Yong Jae Kim, Seon Il Kim, HyeIn Shin, Hyun S. Ahn, Seong-Ju Hwang, WonHyoung Ryu
Summary: This study demonstrated the modification of electrodes with RuO2 nanosheets to enhance the extraction of PEs from thylakoids and promote PE transfer through proton adsorption and surface polarity characteristics. The RuO2 bioanode showed a five times larger current density and a four times larger power density compared to the Au bioanode. Ultimately, electric calculators were successfully powered by photosynthetic energy using the RuO2 bioanode.
Article
Electrochemistry
Adnan Sayegh, Luca A. Perego, Marc Arderiu Romero, Louis Escudero, Jerome Delacotte, Manon Guille-Collignon, Laurence Grimaud, Benjamin Bailleul, Frederic Lemaitre
Summary: This study focuses on extracting energy from oxygenic photosynthesis by rerouting electron flow using intact photosynthetic organisms to generate photocurrent. Researchers found that some quinones can interact with the embedded photosynthetic chain, but the balance between toxicity and bioelectricity production needs to be considered.
Article
Biochemical Research Methods
Christian Castro-Hinojosa, Susel Del Sol-Fernandez, Eduardo Moreno-Antolin, Beatriz Martin-Gracia, Jesus G. Ovejero, Jesus Martinez de la Fuente, Valeria Grazu, Raluca M. Fratila, Maria Moros
Summary: In this study, we describe a simple and efficient method for the functionalization of proteins with magnetic nanoparticles (MNPs) using metal affinity binding. Our method preserves the functionality and colloidal stability of the MNPs while allowing for the precise control of protein orientation and density. This approach has potential applications in various fields.
BIOCONJUGATE CHEMISTRY
(2023)
Article
Chemistry, Physical
Yusuke Yoneda, Masaya Kito, Daiki Mori, Akari Goto, Masaharu Kondo, Hiroshi Miyasaka, Yutaka Nagasawa, Takehisa Dewa
Summary: In this study, a biohybrid LH system was constructed, achieving efficient energy transfer through non-covalent self-assembly. The results suggest that this facile self-assembled biohybrid LH system holds great promise for solar-energy conversion.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Analytical
Guanhua Lin, Wenjie Dong, Renzhe Zhang
Summary: Investigating the light harvesting process of natural antenna complexes can inspire the design of more efficient artificial devices. Gold micro-plates linked with photosynthetic complexes show significantly enhanced fluorescent emission. The synergistic effect of the gold micro-plates allows for a high enhancement factor, making it suitable for designing single-particle fluorescent sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Biochemistry & Molecular Biology
Damian Dziubak, Kamil Strzelak, Slawomir Sek
Summary: This paper investigates the formation and electrochemical properties of lipid films deposited from bicellar mixtures onto thioglucose-modified gold electrodes. It was found that the adsorption of bicelles leads to the formation of a double bilayer structure on the electrode surface, containing defects and pinholes that affect membrane permeability. Freeze-thaw treatment significantly improves morphology and electrochemical characteristics, reducing the number of pinholes and increasing membrane resistance.
Article
Materials Science, Multidisciplinary
Norzila Kusnin, Nor Azah Yusof, Nurul Asyikeen Ab Mutalib, Faruq Mohammad, Jaafar Abdullah, Suriana Sabri, Shuhaimi Mustafa, Ahmad Farabi Mohamad Saman, Fatin Nabilah Mohd Faudzi, Ahmed A. Soleiman
Summary: Electrochemical application has been widely used in biosensor research. In this study, a sensor electrode was improved to enhance the electrochemical conductivity for detecting small DNA molecule interactions. The electrode was modified with copper nanowires/gold nanoparticles, which were randomly distributed and compacted on the electrode surface, enhancing its electrochemical conductivity. The modified electrode exhibited efficient electrochemical conductivity of 20.3 mu A, with an increased effective surface area of 2.3-fold compared to the unmodified electrode, making it promising for biosensor applications.
Article
Chemistry, Physical
Yusuke Yoneda, Tomoyasu Noji, Naoto Mizutani, Daiji Kato, Masaharu Kondo, Hiroshi Miyasaka, Yutaka Nagasawa, Takehisa Dewa
Summary: This study addresses the expanding light-harvesting wavelength and explores the conjugation architecture and mechanism of excitation energy transfer (EET) in photosynthetic LH complex 2. The results provide insights for the development of efficient artificial photosynthetic systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Zheng Wei, Xiaoping Cai, Weifeng Cui, Junping Zhang
Summary: A CA19-9 electrochemical immunosensor was developed using a self-assembled membrane modified with a gold electrode. It demonstrated good specificity, strong anti-interference ability, and high precision and accuracy. The results showed its potential application value.
Article
Chemistry, Physical
Taishi Ano, Fuminao Kishimoto, Shuntaro Tsubaki, Yi-Hsien Lu, J. Nathan Hohman, Masato M. Maitani, Miquel Salmeron, Yuji Wada
Summary: Research shows that by inserting self-assembled monolayers with oriented dipole moments, the Schottky barrier in Pt/TiO2 can be reduced, affecting the catalytic function.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Xinyi Dong, Tingting Gu, Minzhi Li, Weihua Zhu, Xu Liang
Summary: A novel Ir-III corrole with 4-mercaptopyridine substitution was successfully synthesized and characterized, showing efficient electrochemical catalysis for hydrogen evolution and oxygen reduction when functionalized on a gold electrode through Au-S bonds, and low alcohol toxicity was confirmed.
INORGANICA CHIMICA ACTA
(2022)
Review
Chemistry, Multidisciplinary
Roman A. Voloshin, Ayshat M. Bozieva, Barry D. Bruce, Suleyman I. Allakhverdiev
Summary: Membrane electron transfer is essential for energy conversion in central metabolic pathways. Photosynthetic and respiratory electron transport chains can generate proton gradients from sunlight or chemical energy. The use of these apparatuses as energy convertors, especially those based on photosynthesis, has gained interest due to their availability and eco-friendliness. This article reviews the latest advances and challenges in this field.
RUSSIAN CHEMICAL REVIEWS
(2023)
Article
Chemistry, Analytical
Cheng-Chi Chou, Ying-Ting Lin, Iren Kuznetsova, Gou-Jen Wang
Summary: This study proposed a genosensor for qualitative and quantitative detection of genetically modified soybeans using a gold nanoparticle sensing electrode. The genosensor showed high sensitivity, low detection limit, and good recovery rates and stability, demonstrating its potential for practical application in detecting genetically modified crops.
Article
Chemistry, Physical
Natalia D. Aagaard, Eugenia Zelaya, Mariano H. Fonticelli, Julio C. Azcarate
Summary: A quantitative X-ray photoelectron spectroscopy study was conducted on the electron-induced degradation of self-assembled monolayers of n-dodecanethiol on Au(100) and Au(111), revealing that despite differences in the most abundant damaging products on the surfaces, organic material desorbs at comparable rates from both single-crystalline surfaces. The study also provided arguments based on the reaction mechanism to describe the cross-linking of hydrocarbon chains and explain the similar desorption rates of sulfur-containing species from both surfaces.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Analytical
Miriam Chavez, Guadalupe Sanchez-Obrero, Rafael Madueno, Jose Manuel Sevilla, Manuel Blazquez, Teresa Pineda
Summary: This study investigates the effects of different solvents on the formation and properties of EG7-SAMs. The structures of these monolayers depend on the solvent used during formation and the presence of oxygen atoms in the EG7 chains leads to specific interactions with the solvent molecules. The blocking properties of these films are determined by the electrolyte used for analysis, and specific interactions with certain ions decrease the electron transfer rate constant.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Physics, Applied
Hadiyawarman, Yuki Usami, Takumi Kotooka, Saman Azhari, Masanori Eguchi, Hirofumi Tanaka
Summary: The study developed RC devices utilizing Ag-Ag2S core-shell nanoparticles as the reservoir layer, demonstrating the importance of dynamics between the nanoparticles for high accuracy in target waveform generation. The research highlights the great potential of Ag-Ag2S NPs for the development of next-generation RC hardware.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Deep Banerjee, Saman Azhari, Yuki Usami, Hirofumi Tanaka
Summary: This study proposes a method for demonstrating in-materio reservoir computing at room temperature using a SWNT/Por-POM network, successfully reconstructing various Boolean functions with high accuracy through supervised training. The echo-state property and recurrent connection of RC enabled consistent performance over multiple test datasets, with the presence of negative differential resistance dynamics aiding the construction of complex Boolean functions by incorporating additive and subtractive functions equivalently.
APPLIED PHYSICS EXPRESS
(2021)
Article
Multidisciplinary Sciences
Kazutoshi Tani, Ryo Kanno, Riku Kikuchi, Saki Kawamura, Kenji V. P. Nagashima, Malgorzata Hall, Ai Takahashi, Long-Jiang Yu, Yukihiro Kimura, Michael T. Madigan, Akira Mizoguchi, Bruno M. Humbel, Zheng-Yu Wang-Otomo
Summary: In this study, the authors used cryo-EM to analyze the structure of the light-harvesting-reaction center complex in Rhodobacter sphaeroides. They found asymmetric features and altered shape in the complex, and also identified the critical role of protein-U in assembly and stability.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Takumi Kotooka, Yuichiro Tanaka, Hakaru Tamukoh, Yuki Usami, Hirofumi Tanaka
Summary: An Ag2Se nanowire random network was created to serve as a data augmentation device and combined with a binary convolutional neural network (BCNN) for accurate voice classification. The Ag2Se device utilized the nonlinear high-dimensional characteristics of conductive filaments at cross junctions to transform input data into higher-order multiple signals, thereby improving classification accuracy. The study suggests that material-based hardware can be used as a fundamental technology for information processing, achieving data augmentation performance comparable to software.
APPLIED PHYSICS EXPRESS
(2023)
Article
Physics, Applied
Yosuke Shimizu, Kazuki Minegishi, Hirofumi Tanaka, Tsuyoshi Hasegawa
Summary: Researchers have developed a physical reservoir using an Ag2S island network, which can accept direct light irradiation as input. Short-term memory and nonlinearity required for the reservoir are achieved through the diffusion of Ag+ cations in each Ag2S island and the growth of Ag filaments between Ag2S islands. It has been found that direct light irradiation to Ag2S islands can change the local conductivity, leading to improved performance in short-term memory and nonlinearity of the reservoir. By utilizing this effect, the researchers successfully performed a pattern classification of light irradiated to the Ag2S island network reservoir through a rectangular slit, achieving an accuracy of over 95%.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Biology
Kazutoshi Tani, Ryo Kanno, Keigo Kurosawa, Shinichi Takaichi, Kenji V. P. Nagashima, Malgorzata Hall, Long-Jiang Yu, Yukihiro Kimura, Michael T. Madigan, Akira Mizoguchi, Bruno M. Humbel, Zheng-Yu Wang-Otomo
Summary: This study presents the cryo-EM structure of the LH1-RC complex from the acidophilic anaerobic purple bacteria Rpi. globiformis and compares it with other photosynthetic bacteria. The findings provide insights into the evolution and function of photosynthetic bacteria.
COMMUNICATIONS BIOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Saman Azhari, Kouki Kimizuka, Gabor Mehes, Yuki Usami, Yasuhiko Hayashi, Hirofumi Tanaka, Takeo Miyake
Summary: Integrating sensory devices with wireless power transfer technology allows for remote sensing with complex electronic circuitry and communication protocols. Researchers have successfully integrated piezo-responsive porous multiwalled carbon nanotubes/polydimethylsiloxane nanocomposites with a near-field wireless power transfer system to remotely monitor mechanical force. The wireless system transfers power bidirectionally and detects impedance changes in the receiver circuit to wirelessly monitor finger bending and applied force. This approach offers a new path for disposable haptic-based sensory applications in various fields.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Applied
Masaya Hakoshima, Yuki Usami, Takumi Kotooka, Hirofumi Tanaka
Summary: The computation performance of the in-materio reservoir device was evaluated by adjusting the intensity of noise injection. The reservoir device was synthesized using a sol-gel method with an alpha-Fe2O3/titanium bismuth oxide composite. Characterization tests confirmed the presence of alpha-Fe2O3, TiO2, and Bi4Ti3O12 nanoparticles. The results showed nonlinearity, phase differences, and high harmonics in the V-t curves, and the prediction accuracy improved with the addition of a small amount of white noise voltage.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Environmental
Shubham Sharma, Ajendra K. Vats, Linjun Tang, Feng Kaishan, Jumpei Toyoda, Shuichi Nagamatsu, Yoshito Ando, Masaaki Tamagawa, Hirofumi Tanaka, Manish Pandey, Shyam S. Pandey
Summary: Conjugated polymers (CPs) are excellent organic semiconducting materials for flexible electronic applications. Controlling molecular ordering and the formation of large aggregates is crucial in controlling the electrical properties of CP-based devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mao Komura, Hikaru Sotome, Hiroshi Miyasaka, Takuji Ogawa, Yosuke Tani
Summary: The phenomenon of crystal melting by light irradiation, known as photo-induced crystal-to-liquid transition (PCLT), can dramatically change material properties with high spatiotemporal resolution. We report on heteroaromatic 1,2-diketones as a new class of PCLT-active compounds, whose PCLT is based on conformational isomerisation. The luminescence evolution observed in one of the diketones prior to crystal melting provides insights into the sequential PCLT processes.
Article
Chemistry, Multidisciplinary
Saman Azhari, Deep Banerjee, Takumi Kotooka, Yuki Usami, Hirofumi Tanaka
Summary: Creating a physical device that can mimic the human brain functions is a goal for scientists. A 3D porous template was used as a scaffold to fabricate a 3D network of a nanocomposite, overcoming the difficulty in controlling network density in a 2D reservoir system. The 3D device showed improved nonlinear dynamics, spatiotemporal dynamics, and performance in waveform generation compared to the 2D system, with a correlation between resistive junctions and performance.
Review
Engineering, Electrical & Electronic
H. Tanaka, S. Azhari, Y. Usami, D. Banerjee, T. Kotooka, O. Srikimkaew, T-T Dang, S. Murazoe, R. Oyabu, K. Kimizuka, M. Hakoshima
Summary: This paper reviews the progress of random networks of carbon nanotubes as highly energy-efficient computational devices. It systematically explores the applications of carbon nanotubes in neuromorphic and unconventional computing, highlighting their exceptional abilities in performing nonlinear in-materio computing and classification tasks.
NEUROMORPHIC COMPUTING AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Motoharu Nakajima, Kazuki Minegishi, Yosuke Shimizu, Yuki Usami, Hirofumi Tanaka, Tsuyoshi Hasegawa
Summary: In this study, an Ag2S-island network was used as a reservoir system for unconventional computing. The growth and shrinkage of Ag filaments in each Ag2S island caused local conductance change, resulting in a unique non-linear response. By adjusting the frequency and amplitude of the input signals, the capability of the Ag2S-island network as a reservoir was evaluated, and logical operations were performed with an accuracy of over 99%.
Article
Automation & Control Systems
Deep Banerjee, Takumi Kotooka, Saman Azhari, Yuki Usami, Takuji Ogawa, James K. Gimzewski, Hakaru Tamukoh, Hirofumi Tanaka
Summary: This paper presents a hardware-based reservoir computing (RC) platform using SWNT-Por-POM complex, which demonstrates fundamental properties such as nonlinearity, higher harmonic generation, and 1/f(gamma) power law information processing. The device achieves high fitting accuracy and successful object classification based on waveform generation and tactile inputs.
ADVANCED INTELLIGENT SYSTEMS
(2022)
