Article
Chemistry, Multidisciplinary
Lan Yang, Jiangbin Su
Summary: In this study, Cu nanostructures were fabricated and self-assembled by reducing Cu2+ complexes in a mixed aqueous solution. It was found that controlling the types of Cu2+ complexes is crucial for the fabrication and self-assembly of Cu nanostructures. This method provides a controllable and universal approach for the fabrication and self-assembly of Cu nanostructures, showing potential applications in electronic and optoelectronic nanodevices.
Article
Chemistry, Analytical
Shivam Kumar Gautam, Siddhartha Panda
Summary: A highly sensitive copper-based nanocomposite for NH3 detection was reported in this study. The copper-ethylenediamine (Cu-en) nanocomposite functionalized over PANI was utilized for gas sensing, and it detected NH3 concentrations as low as 2 ppm. The sensing mechanism was studied by in-situ IV characteristics and impedance spectroscopy, and it was found that Cu2+ had a strong affinity for NH3, enhancing the sensor response to 100 ppm NH3.
Article
Chemistry, Physical
Xinyu Mao, Liqun Zhu, Huicong Liu, Haining Chen, Wen Li, Rui Cao, Weiping Li
Summary: In this study, graphene was successfully prepared by electrochemical exfoliation and directly dispersed in CuSO4 solutions without adding surfactants, overcoming the obstacle of dispersing graphene in aqueous solutions. The co-deposited graphene affected the oxidation reaction rate and preferred orientation of the coatings, reducing the oxidation degree of the Cu/graphene composite coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Nishesh Kumar Gupta, Suho Kim, Jiyeol Bae, Kwang Soo Kim
Summary: A mixed ligand Cu-based MOF was synthesized and found to exhibit high adsorption capacity for H2S gas, with significantly improved performance after regeneration. The adsorption mechanism involved breaking Cu-carboxylate bonds and formation of CuS nanoparticles and sulfates, leading to enhanced adsorption capacity of the regenerated sample.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Physics, Multidisciplinary
Vibhuti Rai, Lukas Gerhard, Nico Balzer, Michal Valasek, Christof Holzer, Liang Yang, Martin Wegener, Carsten Rockstuhl, Marcel Mayor, Wulf Wulfhekel
Summary: This article presents a new method to activate single molecules by decoupling them from a metallic substrate using the tip of a scanning tunneling microscope, thus achieving individual molecule luminescence. The emission performance of this method compares favorably in terms of quantum efficiency, stability, and reproducibility to that of single molecules deposited on thin insulating layers.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Kambiz Zandi Shahidi, Ghader Faraji
Summary: A new method for producing tungsten-copper composites by melt infiltration into crumpled wire (MICW) is proposed in this study. Compared to conventional methods, this approach demonstrates higher densification, higher electrical conductivity, and lower cycle time and energy consumption.
Article
Multidisciplinary Sciences
Yongbo Song, Yingwei Li, Meng Zhou, Xuan Liu, Hao Li, He Wang, Yuhua Shen, Manzhou Zhu, Rongchao Jin
Summary: This study reports a method to achieve high phosphorescence from metal nanoclusters in non-degassed solution, with a core-shell structure leading to efficient photoluminescence. Unlike other materials, this phosphorescence is less sensitive to air, which is important for lighting and biomedical applications.
Article
Multidisciplinary Sciences
Junyu Ge, Bin Ding, Shuai Hou, Manlin Luo, Donguk Nam, Hongwei Duan, Huajian Gao, Yee Cheong Lam, Hong Li
Summary: The authors have developed a room-temperature ultrasonic nanoimprinting technique, named nanojackhammer, which addresses the challenges faced by nanoimprinting in imprinting hard materials at low or room temperature and in fabricating complex nanostructures rapidly by capitalizing on the concentration of ultrasonic energy flow at nanoscale.
NATURE COMMUNICATIONS
(2021)
Article
Metallurgy & Metallurgical Engineering
Hamed Jamshidi Aval
Summary: The effect of adding copper powder and changing the rotational speed of the consumable rod during friction surfacing of Al-Mg alloy on AA1050 aluminum substrate was investigated. With increasing rotational speed, the distribution and agglomeration of copper powder became more uniform. The average grain size of coatings decreased and the copper-rich particles formed as CuAl2 intermetallic compounds. The maximum load required for debonding coating from substrate increased and the wear rate of coatings decreased compared to the AA1050 substrate.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Inorganic & Nuclear
Sanobar Naaz, Taposi Chatterjee, Kalamoddin Shaikh, Basudeb Dutta, Masoom Raza Siddiqui, Saikh M. Wabaidur, Md Maidul Islam, Abdul Malik Puthan Peedikakkal, Mohammad Hedayetullah Mir, Seikh Mafiz Alam
Summary: A new Cu(II) compound with a one-dimensional coordination polymer structure has been synthesized and its crystal structure has been studied. The compound exhibits strong affinity towards DNA molecules.
Article
Materials Science, Multidisciplinary
S. Mahmoudi, G. Faraji
Summary: A novel approach is proposed for producing Tungsten Copper composite with a functionally gradient structure. By using green tungsten powder and induction sintering, followed by copper infiltration, the composite material is successfully manufactured. The composite material exhibits varying hardness and electrical conductivity in different zones.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Polymer Science
Seokkyu Jang, Eun Ji Choi, Han Jin Cheon, Won Il Choi, Woon Seo Shin, Jong-Min Lim
Summary: This study systematically investigated the effects of small ceramic and metallic powders on the thermal conductivity of rubbery thermal composite pads. By optimizing the composition of fillers, a high thermal conductivity of 2.466 W/m.K was achieved for the composite pads with copper powder replacing aluminum oxide fillers. The distribution of all fillers in the rubbery composite pads was confirmed to be even through SEM images and EDS mapping.
Article
Chemistry, Applied
Max Roemer, Ian Luck, Nicholas Proschogo
Summary: This paper investigates the synthesis of aryl amines from halobenzenes via copper mediated reactions using sodium azide under mild conditions. The reaction proceeds stepwise through the formation of aryl azides, which are then reduced to amines. The methodology allows for the synthesis of amines from different positions of halobenzenes with electron withdrawing groups. The use of modified stirring bars as heterogeneous catalysts is also demonstrated.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Engineering, Electrical & Electronic
Tasuku Nakahara, Kazuki Ise, Kazuyuki Minami
Summary: The study focused on photothermally actuated microheaters for applications in microrobotics and thermally responsive structures, proposing the use of a photosensitive composite for fabrication. While the composite showed some dimensional errors in patterning, it demonstrated significant temperature rise effects in experiments.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2021)
Article
Chemistry, Physical
Karin Rettenmaier, Gregor A. Zickler, Guenther J. Redhammer, Thomas Berger
Summary: Mixed transition metal oxides are promising electrode materials for electrochemical energy storage and conversion. The synthesis of these materials with tailored composition, crystal structure, and morphology is crucial for optimizing their properties. This study reports on the room-temperature electrodeposition of a ternary oxide, ZnMnO3, using earth-abundant metals. The epitaxial growth of ZnMnO3 on ZnO nanowires results in a 2-dimensional morphology and shows promise for the direct growth of other mixed transition metal oxides on conductive substrates.
Article
Thermodynamics
N. Hamzah, M. F. Mohd Yasin, M. T. Zainal, M. Mohd Sies, M. Z. Mohd Yusop, C. T. Chong, N. A. Mohd Subha, M. S. Rosmi Rosmi
Summary: This study analyzes the effect of adding water to the fuel stream during flame synthesis of carbon nanotubes (CNTs). The results show that water addition reduces flame height and axial extent of the growth region. However, the average growth region temperature and CNT morphology remain relatively unchanged. Additionally, water addition leads to a decrease in the thickness of the amorphous carbon layer in the growth region.
COMBUSTION SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Noor Ayuma Mat Tahir, Shahira Liza, Kanao Fukuda, Syazwani Mohamad, Mohd Zakir Fathi Hashimi, Mohd Saifulnizam Mohd Yunus, Yazid Yaakob, Intan Sharhida Othman
Summary: Hard anodizing is a beneficial surface treatment for aluminum alloy, accompanied by the growth of a porous and flawed oxide layer. This study focused on reinforcing fly-ash on the oxide coating and investigating its tribological performance. The findings suggest that composite oxide coatings have the potential to reduce wear rate, despite the limited time period in which friction is reduced.
Article
Materials Science, Multidisciplinary
Golap Kalita, Balaram Paudel Jaisi, Masayoshi Umeno
Summary: In this study, a novel microwave-excited surface-wave plasma process was demonstrated to reduce insulating graphene oxide to highly conducting reduced graphene oxide on flexible substrates, as well as achieving reduction of freestanding graphene oxide paper.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Physics, Condensed Matter
Hisashi Sato, Yuya Ito, Golap Kalita, Yoshimi Watanabe
Summary: The crystallographic texture of pure Cu can be modified by shot peening, resulting in the formation of a {110} fiber texture. Moreover, using shot-peened specimens with {110} fiber texture improves the growth of high-quality graphene on their surfaces. Therefore, controlling the crystallographic texture by shot peening is of great importance for preparing high-quality graphene and other catalytic substrate surfaces.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Article
Polymer Science
Nur Hidayah Shahemi, Shahira Liza, Yoshinori Sawae, Takehiro Morita, Hironori Shinmori, Yazid Yaakob
Summary: Recent studies have shown that the wear of UHMWPE increases significantly in the presence of proteins, and adding graphite and graphene oxide (GO) can improve its wear properties. The wear resistance improvement is primarily attributed to the addition of GO filler, which enhances subsurface strength and heat dissipation, ultimately reducing protein denaturation.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Muhammad Ayub, Mohd Hafiz Dzarfan Othman, Mohd Zamri Mohd Yusop, Imran Ullah Khan, Zhong Sheng Tai, Siti Khadijah Hubadillah
Summary: Recycling palm oil fuel ash (POFA) into holey graphene nanosheets offers a sustainable and greener approach to address environmental pollution. This research focuses on studying the effects of temperature and ratio of potassium hydroxide (KOH) on the production of porous graphene sheets with optimized conditions found at 800 degrees C and a 1:3 impregnation ratio. The resulting graphene nanosheets have uniform porosity and comparable surface area, pore volume, and carbon percentage to previous findings using other biomass sources.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Faysal Selimoglu, Bahri Gur, Muhammed Emre Ayhan, Fatma Gur, Golap Kalita, Masaki Tanemura, Mehmet Hakki Alma
Summary: Procalcitonin(PCT) is a highly sensitive biomarker for severe inflammation and infection in the early detection of sepsis. The interaction between electrode material and attached material is important. A silver nanoparticle (AgNp) doped graphene-based sensitive PCT biosensor with low-cost, environmentally friendly materials is presented here. The biosensor exhibits reusability, adhesion of antibody-protein, and a detection limit of 0.55 ng/mL.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Nur Aszreen Zulkifli, Shahira Liza, Hiroki Akasaka, Kanao Fukuda, Nur Adilah Mohd Rawian, Nur Afieqah Md Ghazazi, Noor Ayuma Mat Tahir, Yazid Yaakob
Summary: Using pulse current and DLC flakes can improve the surface quality and durability of hard anodizing. Increasing the DLC content enhances the hardness and wear resistance of the oxide film, while using 5 g/L DLC in the electrolyte reduces friction.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Balaram Paudel Jaisi, Rucheng Zhu, Golap Kalita, Masayoshi Umeno
Summary: The growth of carbon thin films on insulating substrates with nitrogen doping at various temperatures was investigated using microwave-excited surface wave plasma chemical vapor deposition technique. Partially graphitized carbon thin films were obtained at a low temperature of 150 degrees C on quartz substrates. The addition of nitrogen reduced the granular morphology and formed planar structures, revealing the significance of nitrogen incorporation in controlling the morphology of carbon films.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Ayman Abuallan, Mohd Hafiz Mohd Zaid, Khamirul Amin Matori, Yazid Yaakob, Abdul Rahman Sarmani, Wei Mun Cheong, Zhi Wei Loh
Summary: This study investigated the effect of neodymium oxide modification on the elastic, structural, and physical properties of magnesium borotellurite glasses. Increasing the concentration of Nd2O3 resulted in an increase in the density of the bulk samples from 3.97 g/cm3 to 4.10 g/cm3, while the molar volume showed the opposite trend. X-ray diffraction analysis confirmed the amorphous state of the glasses, and the elastic moduli exhibited a linear increase with the increment of Nd2O3. The elastic moduli calculated using the Makishima-Mackenzie and Rocherulle's models followed the same trend as the experimental values. The results indicated that the MBTNd-3 glass sample had the optimum properties for high-strength glass applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Parvin Asogan, Adrian Afzal Ariff, Aizuddin Supee, Rafiziana Md Kasmani, Norazana Ibrahim, Mohd Akhmal Muhammad Sidek, Mohd Zamri Mohd Yusop, Abd Khamim Ismail
Summary: Iron-sulphide-oxide (FeSxOy) thin films were prepared on FTO-coated glass substrate for 3 hours via CBD from an aqueous solution. The effects of bath temperature on film properties were studied using various characterization techniques. The optimum bath temperature of 75 degrees C resulted in better film quality with n-type photoresponse and a large bandgap of 3.36-3.57 eV, which could be attributed to crystallinity, phase purity, and high oxygen content.
BULLETIN OF MATERIALS SCIENCE
(2023)
Review
Chemistry, Physical
Golap Kalita, Takashi Endo, Toshihiko Nishi
Summary: This paper reviews the synthesis methods of oxide-based solid-state electrolytes (SSEs), focusing on the low temperature synthesis of cubic-phase LLZO particles and the challenges in achieving high relative density with excellent ionic conductivity. The future prospects of applying these ultrafine particles in all-solid-state batteries are also discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
K. F. Chan, N. A. M. Maznam, M. A. Hazan, R. N. A. Ahmad, A. S. Sa'ari, N. F. I. Azman, M. S. Mamat, M. A. . A. . Rahman, M. Tanemura, Y. Yaakob
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) were successfully grown on nickel oxide (NiO) via chemical vapour deposition (CVD), and the influence of catalyst particle size and precursor flowing path on the growth of MWCNTs was investigated. The results showed that increasing NiO milling time and choosing an appropriate D value can improve the crystallite size and carbon yield of MWCNTs.
Article
Materials Science, Multidisciplinary
K. F. Chan, A. K. Ranade, P. Desai, M. A. Hazan, N. F. I. Azman, S. Shaharifin, G. Kalita, M. S. Mamat, M. Tanemura, Y. Yaakob
Summary: Carbon nanomaterials have significant applications in various fields, and green synthesis of these materials using low-cost and energy-efficient methods is of great interest. In this study, carbon nanotubes and graphitic carbon layers were synthesized using barbeque grease as the carbon precursor via chemical vapour deposition technique. The research aimed to explore novel and affordable carbon precursors for high-quality carbon nanomaterial production.
Article
Chemistry, Multidisciplinary
Tatsuya Akiyama, Shuhei Nakanishi, Yazid Yaakob, Bhagyashri Todankar, Vikaskumar Pradeepkumar Gupta, Toru Asaka, Yosuke Ishii, Shinji Kawasaki, Masaki Tanemura
Summary: This study proposes a simple process for the room temperature fabrication of pseudocapacitor electrodes with an enhanced surface area and excellent faradaic redox reaction layer. A carbon layer containing fine Ni nanoparticles dispersed on a metallic electrode was successfully prepared through ion irradiation and local graphitization. The fabricated electrode showed a significantly increased stored charge ability compared to the bulk Ni foil. The results suggest that the carbon layer with Ni nanoparticles fabricated by ion irradiation has great potential for the development of supercapacitors.
