Article
Chemistry, Analytical
Yuqing Yang, Alan O'Riordan, Pierre Lovera
Summary: This study demonstrates a rapid method for direct monitoring of the harmful pesticide 2,4-D in water without sample pre-treatment. Large-area, high-density, and homogeneous SERS substrates were synthesized using an electrochemical method. The Ag-GA SERS sensor showed a linear response towards 2,4-D detection and accurately detected the pesticide in different water samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Oktaviana Dewi Indah Prasiwi, Teguh Endah Saraswati, Miftahul Anwar, Abu Masykur
Summary: The study investigated the use of magnetic carbon nanofibers (CNFs) for surface-enhanced Raman scattering (SERS) to detect small amino acid glycine as an analyte model. The results showed that CNFs grown using Ni/C catalyst as the substrate had higher SERS enhancement compared to those grown using Ni catalyst. The increase in CVD temperature during CNF preparation led to higher Raman intensity and enhancement factor.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Tristan C. Paul, Guy M. Hagen, Anatoliy O. Pinchuk, Kelly L. McNear
Summary: Creating sensitive and reproducible SERS substrates is a challenge. This study found that using a 405 nm laser to deposit lines of silver nanoparticles from a silver nitrate and sodium citrate solution yielded the best enhancement and consistency.
Article
Nanoscience & Nanotechnology
Ryan Kisslinger, Saralyn Riddell, Ajay P. Manuel, Kazi M. Alam, Aarat P. Kalra, Kai Cui, Karthik Shankar
Summary: The study demonstrates the formation of Ta2O5 nano-dimple arrays on non-native substrates and the synthesis of gold nanoparticles (Au NPs) on these arrays through anodization and annealing processes. Various factors affecting the formation of the arrays and the properties of Au NPs were investigated. The resulting plasmonic heterojunctions showed significantly higher local field enhancement and catalytic activity compared to Au NPs on quartz substrates.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yulian Zeng, Fengyan Wang, Daxue Du, Shan Liu, Chenbo Wang, Zhaopeng Xu, Haiyan Wang
Summary: This study fabricated Ag/ZnO hybrid SERS substrates with high sensitivity and low detection limit by anchoring Ag nanoparticles on ZnO nanotower arrays without surface modifiers. The high SERS sensitivity is attributed to a combination of nanogaps and corners of Ag-NPs, as well as the retention of R6G molecules on ZnO nanotower nanosteps, allowing the molecules to access the hot-spot regions.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Peipei Zhang, Yonglong Jin, Jinghuai Fang
Summary: In this study, triangular Au nanoparticle arrays were obtained on the surface of Cu films by using PS microspheres as masks and thermal evaporation. The arrays were then transferred to PDMS and used as an active substrate for SERS. The PDMS's thermal expansion allowed for dynamic SERS detection, and modification of the substrate improved the detection sensitivity for low concentration targets.
Article
Chemistry, Physical
Lianping Chen, Yuanhong Gao, Yibin Chen, Jun Cao
Summary: The influence of europium on the structure and luminescent properties of CaWO4 thin films was investigated, and the sputtering yields of different compounds were studied. The results showed that the compositions of the deposits matched those of the targets, and the lattice constants increased under certain conditions. The preferential growth along a specific crystal plane also increased due to the substitution of Ca2+ with Eu2+. Doping of Eu led to improved photoluminescence performance of the films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Biochemical Research Methods
Volodymyr Dzhagan, Oleksandr Smirnov, Mariia Kovalenko, Oleksandr Gudymenko, Nazar Mazur, Olga Kapush, Mykola Skoryk, Yaroslav Pirko, Alla Yemets, Mykhailo Valakh, Petro Shepeliavyi, Volodymyr Yukhymchuk
Summary: In this study, flower-like zinc oxide nanoparticles (NPs) were synthesized using a cost-effective colloidal route with Ganoderma lucidum extract. These NPs demonstrated advantageous properties for surface-enhanced Raman spectroscopy (SERS) and other sensing applications due to their large effective surface area. The use of mycoextract as a surface stabilizer allowed for subsequent deposition of metal NPs or layers. The SERS activity of the ZnO NPs was demonstrated through the detection of standard dye analytes without additional optimization of the substrates. The observed results highlight the potential of these freestanding ZnO NPs and their dense films for various applications, including catalysis and sensing.
ANALYTICAL BIOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhenye Zhan, Dongxu Lin, Juntao Cai, Yueheng Lu, Aidi Chen, Tiankai Zhang, Ke Chen, Pengyi Liu, Xiaomu Wang, Weiguang Xie
Summary: This study presents a new type of perovskite photodiode-blocking diode crossbar array by vapor deposition method, which achieves excellent suppression of optoelectrical crosstalk among pixels and fast response time for real-time image acquisition. The imaging sensor demonstrates a large linear dynamic range and weak light sensitivity.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Analytical
Weiwei Zheng, Wentao Tian, Xiaojun Liu, Qingquan Zhang, Chenghua Zong, Jia-Ping Lai, Wenfeng Zhao
Summary: The study synthesized Ag nanoparticles on polyester fiber membrane surfaces, creating significant SERS activity with "hot spots" and an enhancement factor of 2.1×10^9. Sodium saccharin was bonded to the Ag NPs surface for sensitive and rapid detection of SS in soft drinks. The method is reliable, with a recovery rate ranging from 93% to 103%, suitable for actual sample detection.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Qingguo Gao, Jie Lu, Simin Chen, Lvcheng Chen, Zhequan Xu, Dexi Lin, Songyi Xu, Ping Liu, Xueao Zhang, Weiwei Cai, Chongfu Zhang
Summary: In this study, a novel method for synthesizing high-quality and uniform monolayer MoS2 crystals on glass substrates was developed using inert Al2O3 as the buffer layer. The advantages of using glass/Al2O3 substrates were demonstrated through a direct comparison with glass/Mo substrates. Raman and PL spectra were used to further characterize the MoS2 crystals, and the thickness and uniformity of the crystals were confirmed by atomic force microscope and Raman mapping. This work is significant for the commercial applications of MoS2.
Article
Spectroscopy
David-Benjamin Grys, Rohit Chikkaraddy, Marlous Kamp, Oren A. Scherman, Jeremy J. Baumberg, Bart de Nijs
Summary: Irreproducibility in SERS due to substrate variability is a major obstacle, but can be minimized by identifying and reducing sources, facilitating the transition of SERS from the lab to real-world applications.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Yunbiao Zhao, Yue li, Yi Chen, Yuhan Chen, Danqing Zhou, Ziqiang Zhao
Summary: The direct synthesis of high-quality and uniform graphene on dielectric substrates is achieved by employing a Cu ion implantation assisted method, improving the growth rate of graphene without introducing metal contamination. An interesting growth behavior of graphene on sapphire substrate was observed, indicating potential applications in electronics.
Article
Chemistry, Physical
Ksenia A. Maleeva, Ilia E. Kaliya, Anton P. Tkach, Anton A. Babaev, Michail A. Baranov, Kevin Berwick, Tatiana S. Perova, Alexander Baranov, Kirill Bogdanov
Summary: SERS is a versatile tool for studying matter composition and structure. This study focuses on the preparation of a SERS substrate using a self-assembling plasmonic nanoparticle film (SPF) in a polymer matrix. The optimal parameters for SPF synthesis and assembly in various polymer matrices are investigated. The research results provide valuable information for maximizing SERS signal and routine use of the SERS substrate.
Article
Chemistry, Physical
Shiwei Wang, Chunyang Zheng, Xiucai Sun, Yixuan Zhao, Shengping Zhang, Qingqing Liu, Jiawei Yang, Yeshu Zhu, Jiaxin Shao, Mingyue Wei, Wanjian Yin, Jianbo Yin, Li Lin, Kaicheng Jia, Zhongfan Liu
Summary: An efficient method was demonstrated to synthesize centimeter-sized graphene films with over 80% bilayer ratio on confined Cu substrates. The obtained bilayer graphene films showed a 100% AB-stacking structure confirmed by transmission electron microscopy and Raman characterization. The high quality of the bilayer graphene films was also evidenced by tunable band-gap and uniform optical transmittance. This work provides new insights into graphene growth with controlled layer thickness and a new choice for AB-stacked bilayer graphene film production.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Biotechnology & Applied Microbiology
Yuki Terauchi, Megumi Nagayama, Takumi Tanaka, Hiroki Tanabe, Akira Yoshimi, Kei Nanatani, Hiroshi Yabu, Toshihiko Arita, Takeshi Higuchi, Tomoshi Kameda, Keietsu Abe
Summary: The adsorption kinetics of hydrophobin RolA onto solid surfaces and the self-assembled structures formed by RolA molecules were studied. The results showed that the amount of adsorbed RolA, the chemical properties of the surfaces, and the zeta potential of RolA all affected the self-assembled structures formed on the surfaces.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Hiroshi Yabu, Kosuke Ishibashi, Manjit Singh Grewal, Yasutaka Matsuo, Naoki Shoji, Koju Ito
Summary: A rare metal-free and highly efficient ORR/OER electrocatalyst was prepared by calcination of a mixture of blood meal and ascidian-derived cellulose nanofibers. The obtained carbon alloys showed promising ORR/OER performances, providing a new approach for electrocatalyst fabrication and contributing to CO2 reduction and a good life-cycle assessment value in the production of sustainable energy devices.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Ryota Kotani, Soichi Yokoyama, Shunpei Nobusue, Shigehiro Yamaguchi, Atsuhiro Osuka, Hiroshi Yabu, Shohei Saito
Summary: Understanding the transmission of nanoscale forces is crucial in polymer physics. Physical approaches have limitations in analyzing the local force distribution in condensed environments. This study presents a conformationally flexible dual-fluorescence force probe, enabling ratiometric analysis of the distribution of local forces in a stretched polymer chain network. Chemical control of the probe location reveals a higher local stress concentration at crosslinkers than at main chains, especially in a strain-hardening region.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Bihai Chen, Takehiko Wada, Hiroshi Yabu
Summary: By controlling the wettability of honeycomb porous membranes, an extremely thin oil-water separation membrane has been developed for easy separation of water and oil. The method allows different liquids to be separated based on their densities when the initial liquid added to the surface of the membrane is changed.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Polymer Science
Shahkar Falak, Bo Kyoung Shin, Hiroshi Yabu, Do Sung Huh
Summary: Pore-selective silver-functionalized honeycomb-patterned polystyrene films were fabricated using a modified breath figure method. The antibacterial activity of the functional film was achieved by creating micro-trapping pits through the selective coating of silver in the pores. The film showed good antibacterial activity against Escherichia coli and Staphylococcus aureus. Furthermore, this method could potentially be used to selectively functionalize other metals or inorganic materials, providing diverse applications for honeycomb-patterned films.
Article
Chemistry, Physical
Prashant Ghediya, Hui Yang, Takashi Fujimoto, Yuqiao Zhang, Yasutaka Matsuo, Yusaku Magari, Hiromichi Ohta
Summary: Amorphous transparent oxide semiconductor InGaZnO4 (IGZO)-based thin-film transistors (TFTs) are widely used as the backplane for flat panel displays. In order to achieve higher-definition displays in the future, alternative active materials with higher field effect mobility (μFE) are needed. In this study, it is shown that a zinc-rich composition enhances the electron transport properties of IGZO(m)-TFTs. The best TFT performance was obtained with m = 7, and the carrier effective mass of IGZO(m) films was found to be 0.16 m(0), independent of the m-value. The present results provide a strategy for improving the design of next-generation TFTs with higher μFE values.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Zhiping Bian, Qian Yang, Mitsuki Yoshimura, Hai Jun Cho, Joonhyuk Lee, Hyoungjeen Jeen, Takashi Endo, Yasutaka Matsuo, Hiromichi Ohta
Summary: Researchers have successfully modulated the thermal conductivity of solid-state electrochemical thermal transistors by manipulating the ordered lattice arrangement of the material, leading to improved performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Liang Tong, Yuta Nabae, Tomoyasu Hirai, Hiroshi Yabu, Teruaki Hayakawa
Summary: Advancements in nanotechnology have allowed for the preparation of polymer particles with ordered internal and surface structures. This study used 3D confined self-assembly to create well-shaped spheres with ordered mesostructures. The internal mesoporous structure was formed through microphase separation, while the surface mesostructure was caused by the decomposition of certain domains.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Manjit Grewal, Kosuke Ishibashi, Mitsuo Hara, Yuya Ishizaki, Shusaku Nagano, Hiroshi Yabu
Summary: To achieve safe and high-performance Li-ion batteries, it is crucial to develop electrolytes with high impact resistance and high ionic conductivity. The use of poly(ethylene glycol) diacrylate (PEGDA) to form 3D networks and solvated ionic liquids has improved the ionic conductivity at room temperature. However, the effects of PEGDA's molecular weight on ionic conductivities and the relationship between ionic conductivities and network structures of cross-linked polymer electrolytes have not been thoroughly discussed.
Article
Nanoscience & Nanotechnology
Akihiro Nishida, Tsukasa Katayama, Yasutaka Matsuo
Summary: In this study, HfO2 thin films were fabricated using a novel Cl-free Hf precursor, Hf(dmap)4, through ALD. The results showed that Hf(dmap)4 exhibited high stability and decomposition temperature at high temperatures, making it suitable for high-temperature ALD. However, the film growth rate was lower due to the steric hindrance of the precursor structure.
ACS APPLIED NANO MATERIALS
(2023)
Review
Green & Sustainable Science & Technology
Tengyi Liu, Hiroshi Yabu
Summary: This review proposes a new classification approach for biomass-derived catalytic materials by focusing on the role of bio-based materials in the overall catalyst system. It categorizes bio-based materials based on the active components, carbon support, and the entire catalyst, and provides a comprehensive summary of catalytic materials at different scales. Recent developments of biomass-based electrocatalysts for various reactions are also summarized.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
Article
Chemistry, Physical
Prashant Ghediya, Hui Yang, Takashi Fujimoto, Yuqiao Zhang, Yasutaka Matsuo, Yusaku Magari, Hiromichi Ohta
Summary: Amorphous transparent oxide semiconductor InGaZnO4 (IGZO)-based thin-film transistors (TFTs) have been practically used in flat panel displays. Alternative active materials with higher field effect mobility (mu(FE)) are necessary for future higher-definition displays. This study shows that a Zn-rich composition enhances the electron transport properties of IGZO(m)-TFTs. The results provide a strategy for improving next-generation TFTs with higher mu(FE) values.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Jinjian Wei, Yi Yu, Yasutaka Matsuo, Liang Zhang, Hideyuki Mitomo, Yuqin Chen, Kuniharu Ijiro, Zhide Zhang
Summary: In this study, the spontaneous self-assembly of binary mixtures of small and large gold nanoparticles (GNPs) into size-segregated structures was demonstrated. The resulting structure, referred to as a bilayer-like gold nanoparticle vesicle (GNV), resembled the molecular bilayer structure of a liposome. This approach provides a new method for creating biomimetic bilayer capsules with different physical properties.
Article
Green & Sustainable Science & Technology
Kosuke Ishibashi, Manjit Singh Grewal, Koju Ito, Naoki Shoji, Yasutaka Matsuo, Hiroshi Yabu
Summary: As the demand for high-performance electrocatalysts continues to grow, this study presents a possible strategy to fabricate biomass-derived electrocatalysts with excellent electrochemical performance, without the need for rare or harmful metals. This could be a promising approach for high-capacity energy storage devices using biomass resources.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
