Article
Materials Science, Multidisciplinary
Chutima Kongvarhodom, Nant Nammahachak, Wannapong Tippomuang, Somboon Fongchaiya, Carl Turner, Sutatch Ratanaphan
Summary: The influence of crystallographic textures on the growth of CuO nanowires was investigated, with a high number-density observed in (100) and (101)-textured coppers but not in copper with a strong (111) texture. It was found that tailoring the texture can achieve the growth of CuO nanowires via low-temperature thermal oxidation.
Article
Chemistry, Multidisciplinary
Thomas Cossuet, Laetitia Rapenne, Gilles Renou, Estelle Appert, Vincent Consonni
Summary: An original fabrication process was reported to form open-ended TiO2 nanotubes using ZnO nanowires as positive templates. The differential crystallization process resulted in hexagonal-shaped TiO2 nanotubes with high crystalline quality. This approach allows for the integration of high-quality, open-ended TiO2 nanotubes with tunable length and wall thickness on a wide range of substrates.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Materials Science, Ceramics
Thi Ha Tran, Thi Mai Anh Nguyen, Vu Phuong Thao Dao, Cong Doanh Sai, Thanh Cong Bach, Nguyen Hai Pham, An Bang Ngac, Van Thanh Pham, Thi Kim Chi Tran, Hyeonsik Cheong, Viet Tuyen Nguyen
Summary: This study reports a facile process to fabricate CuO/Au core/shell nanowires, which show high sensitivity as SERS substrates capable of detecting methylene blue at concentrations as low as 10(-13) M. The major advantages of these SERS substrates are their sensitivity, uniformity, and purity without the presence of organic surfactants in the synthesis process.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jierui Mu, Xiaohong Shi, Xu Han, Jie Li, Li Yang
Summary: The study demonstrated that hafnium carbide nanowires (HfCnws) layer can be in-situ synthesized on carbon/carbon (C/C) composites without a catalyst. The growth of HfCnws was based on a vapor-solid (VS) mechanism, with root growth being the common growth type. Introduction of HfCnws led to a significant improvement in the oxidation resistance of the SiC coating, attributed to the enhanced toughness from the multiple-prong growth of HfCnws.
Article
Energy & Fuels
Hai-Xu Zhao, Yi-Lin Liu, Gui-Gen Wang, Fei Li, Gui-Zhong Li, Hai-Ling Zhou, Hua-Yu Zhang, Jie-Cai Han
Summary: A hybrid electrode consisting of copper nanowires and carbon nanotubes has been prepared by a simple vacuum-filtration method, showing high specific capacitance and excellent cycling characteristics. The one-dimensional structure of the electrode provides significant advantages in terms of electron/ion transport pathways, demonstrating its broad applications as power supplies for electronic devices with excellent electrochemical performance and stability.
Article
Chemistry, Multidisciplinary
Lenka Matejova, Ivana Troppova, Satu Pitkaaho, Katerina Pacultova, Dagmar Fridrichova, Ondrej Kania, Riitta Keiski
Summary: The catalytic performance of TiO2, CeO2, and CuO-based open-cell foam supported catalysts in the oxidation of methanol and dichloromethane was investigated. The TiO2-CuO@VUKOPOR((R))A foam showed the best catalytic activity and CO2 yield in methanol oxidation, while the TiO2-CeO2-CuO@VUKOPOR((R))A foam was the best in dichloromethane oxidation. These results suggest the potential use of these catalysts in industrial applications for the removal of volatile organic compounds.
Article
Crystallography
Helver Augusto Giraldo-Daza, Jose Dario Agudelo-Giraldo, Cesar Leandro Londono-Calderon, Henry Reyes-Pineda
Summary: In this study, the structural defects and thermal conductivity of CuO, ZnO, and CuO/ZnO nanowires were investigated using molecular dynamics simulation. The results showed the appearance of defects after simulation, with the formation of grains to reduce energy. The CuO nanowires exhibited a contraction effect on the basal plane, while the ZnO nanowires exhibited a contraction effect on the Zn-Zn distance and the length of the nanowires.
Review
Chemistry, Physical
Oleg Baranov, Kateryna Bazaka, Thierry Belmonte, Claudia Riccardi, H. Eduardo Roman, Mandhakini Mohandas, Shuyan Xu, Uros Cvelbar, Igor Levchenko
Summary: This article provides an overview of recent innovations in the fabrication and applications of low-dimensional copper oxide nanostructures, with a focus on energy, sensing, and catalysis. Various fabrication techniques, such as oxygen plasma-based methods and thermal oxidation approaches, are discussed. The article also emphasizes the importance of understanding the effect of process parameters on the growth of these nanomaterials and their integration into more complex material architectures and devices.
NANOSCALE HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Raveesh Siddaramaiah, Vimal Kumar Singh Yadav, Ayan Pal, Roy Paily Palathinkal
Summary: High aspect ratio CuO nanowires were synthesized with good crystallinity and minimal impurities through thermal oxidation, and were used to fabricate two-terminal, single nanowire devices with good photocurrent response. The devices exhibited fast response and recovery times, and their switching characteristics were explored at various bias voltages.
Article
Chemistry, Inorganic & Nuclear
Wuzhengzhi Zhang, Nannan Zhu, Lianchun Ding, Yan Hu, Zhengcui Wu
Summary: Researchers have developed Ag NPs/CuO MNSs heterostructure with optimized catalytic activity and selectivity for CO2ER to CO. The optimal catalyst Ag-1.01%/CuO exhibits high catalytic efficiency and stability at -0.7 V.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Matawee Punginsang, Dario Zappa, Elisabetta Comini, Anurat Wisitsoraat, Giorgio Sberveglieri, Andrea Ponzoni, Chaikarn Liewhiran
Summary: In this study, sensors based on WO3 nanowires sensing films were fabricated by thermal oxidation method on alumina substrates and functionalized with gold nanoparticles by RF magnetron sputtering. An optimal sputtering time of 10 seconds led to significantly enhanced sensing performances towards H2S, with a detection limit of 0.17 ppb for 5 ppm at 350 degrees C and 50% relative humidity.
APPLIED SURFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Tung-Hao Chang, Hsin-Wei Di, Yu-Cheng Chang, Chia-Man Chou
Summary: In this study, vertically aligned CuO nanowires were fabricated on Cu foil through a simple process and further improved by depositing an intermediate layer of resorcinol-formaldehyde (RF) and silver (Ag) nanoparticles. The CuO@RF@Ag nanowires exhibited higher surface-enhanced Raman scattering (SERS) sensitivity for detecting rhodamine 6G (R6G) molecules compared to CuO@Ag nanowires grown by ion sputtering. The CuO@RF@Ag nanowires also showed high sensitivity for detecting amoxicillin and 5-fluorouracil.
Review
Polymer Science
Ottavia Bellotto, Maria C. Cringoli, Siglinda Perathoner, Paolo Fornasiero, Silvia Marchesan
Summary: The use of peptides as templates for inorganic nanoparticle formation is an environmentally friendly method with applications in various fields. Short-peptide gelators provide dynamic supramolecular environments, and recent research progress outlines future research directions.
Article
Chemistry, Inorganic & Nuclear
Zhekun Chen, Gongfa Yuan, Rui Zhou, Weipeng Huang, Minghui Hong
Summary: This paper presents a method combining laser texturing and thermal oxidation to prepare durable CuO nanowires on copper substrate. The density of CuO nanowires is increased through additional laser post-treatment, resulting in excellent superhydrophobicity and enhanced anti-icing performance. The method opens up new possibilities for enhancing the anti-icing property of copper-based equipment in low-temperature environments.
Article
Chemistry, Analytical
Zehua Chen, Bingbing Li, Jinbiao Liu, Hongji Li, Cuiping Li, Xiuwei Xuan, Mingji Li
Summary: A label-free immunosensor was developed for trace detection of cancer antigen 125 (CA125) in serum using oxidation and reduction dual channel mode. The oxidation channel showed higher sensitivity, lower detection limit, higher stability, and lower performance deviation compared to the reduction channel. This immunosensor demonstrated successful detection of CA125 in human serum.
Article
Chemistry, Inorganic & Nuclear
T. P. Yadav, J. L. Palma, D. P. Singh, S. Michea
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Physics, Condensed Matter
G. Marin, L. Essaleh, S. Amhil, S. M. Wasim, R. Bouferra, A. Zoubir, M. E. El Alaoui El Moujahid, D. P. Singh, L. Vivas
PHYSICA B-CONDENSED MATTER
(2020)
Article
Chemistry, Multidisciplinary
Juan M. Garcia-Garfido, Javier Enriquez, Ignacio Chi-Duran, Ivan Jara, Leonardo Vivas, Federico J. Hernandez, Felipe Herrera, Dinesh P. Singh
Summary: By studying and controlling the solvothermal synthesis process, large-area MOF single crystals were successfully obtained, and a reaction mechanism for crystal formation was proposed. The nucleation and growth process of MIRO-101 were investigated through ex situ crystal image analysis, deepening the understanding of MOF growth processes in solution.
Article
Chemistry, Multidisciplinary
Gerzon E. Delgado, Giovanni Marin, Syed Wasim, Carlos Rincon, Dinesh P. Singh
Summary: This work focuses on the preparation and structural characterization of the semiconductor Cu3In5 square Se-9, which crystallizes with tetragonal symmetry and consists of distorted CuSe4 and InSe4 tetrahedra. The compound is related to p-type CuInSe2 and n-type CuIn3Se5 semiconductor compounds used in high-efficiency solar cells.
ORBITAL-THE ELECTRONIC JOURNAL OF CHEMISTRY
(2021)
Article
Energy & Fuels
Leonardo Vivas, Dinesh Pratap Singh
Summary: The study focuses on a new type of active electrode material rGO-Au composite, synthesized in an eco-friendly way. It performs well as a supercapacitor in both three-electrode configuration and coin cell device, showing high specific capacitance and capacity retention, indicating its potential for commercialization.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Environmental Sciences
Krishnamoorthy Shanmugaraj, Cristian H. Campos, Ramalinga Viswanathan Mangalaraja, Karuppasamy Nandhini, Radhamanohar Aepuru, Cecilia C. Torres, Dinesh Pratap Singh, Deepak Kumar, Malaichamy Ilanchelian, Ajit Sharma, Dai-Viet N. Vo
Summary: In this study, a halloysite nanotubes catalyst modified with gold nanoparticles was synthesized and its performance was investigated. The results showed that the catalyst exhibited excellent efficiency in degrading dyes and reducing 4NM, with good reusability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Felipe Lozano-Steinmetz, Victor A. Martinez, Diego A. Vasco, Alonso Sepulveda-Mualin, Dinesh Patrap Singh
Summary: The research focuses on the synthesis and characterization of rGO/Ag aqueous nanofluids, as well as the effects of Ag concentration on thermal conductivity and viscosity. The results show that these nanofluids have potential applications in heat transfer.
Article
Chemistry, Multidisciplinary
Ignacio Chi-Duran, Ruben A. Fritz, Rodrigo Urzua-Leiva, Gloria Cardenas-Jiron, Dinesh Pratap Singh, Felipe Herrera
Summary: Metal-organic frameworks (MOFs) have shown promise for developing next-generation solid-state devices with applications in optics. However, the difficulty in growing large, high-quality MOF single crystals has hindered the implementation of functional devices. By controlling the synthesis conditions, researchers successfully produced large, noncentrosymmetric MOF single crystals with a unique shape and high surface area. These crystals exhibited anisotropic absorption, and the observed size dependence in optical anisotropy was correlated with the preferred orientation of the molecules. This work opens up possibilities for developing optical polarization switches based on MOFs.
Article
Chemistry, Multidisciplinary
Felipe Lozano-Steinmetz, Maria Paz Ramirez-Navarro, Leonardo Vivas, Diego A. Vasco, Dinesh Pratap Singh, Carlos Zambra-Sazo
Summary: Nanofluids, with their improved thermal properties, have gained interest for microchannel heat sink applications. In this study, aqueous nanofluids based on reduced graphene oxide (rGO) decorated with manganese dioxide (MnO2) were prepared. The nanofluids were characterized and their stability, thermal conductivity and rheological behaviors were studied. The results showed that the nanofluids had higher thermal conductivity than water, making them promising alternatives for micro- and millichannel heat sinks.
Article
Materials Science, Multidisciplinary
Krishnamoorthy Shanmugaraj, Ramalinga Viswanathan Mangalaraja, Cristian H. Campos, Dinesh Pratap Singh, R. Udayabhaskar, Santiago Bedoya, Radhamanohar Aepuru
Summary: This work reports the synthesis of PtNPs-TiO2NTs catalyst, which exhibits high catalytic efficiency and operational stability in the reduction of AZB dye.
Article
Materials Science, Multidisciplinary
Mahendra Kumar, Chandra Kumar, Deepti Saxena, Dinesh Pratap Singh, Sachin Kumar Sharma, Kapil Saxena
Summary: In this study, Cu2S/CdS thin-film was deposited on an FTO substrate using the spray-pyrolysis technique. Field-emission scanning electron microscopy (FESEM) images showed that the thin-films were mono-dispersed and nearly spherical, with an average size ranging from 50 nm to 100 nm, which increased with increasing temperature. The performance of Sn/Cu2S/CdS/FTO/glass hetrojunction diodes was analyzed through I-V measurement, and parameters such as potential height, leakage current, ideality factor, and series-shunt resistance were calculated using different models. It was observed that the ideality factor decreased from 1.31 to 1.12 and the potential height increased from 0.79 to 0.86 with increasing temperature, according to the thermionic emission model. The estimated values of the diode parameters from these three different methods were in good agreement.
Article
Chemistry, Multidisciplinary
Dinesh Pratap Singh, Leonardo Vivas, Adrian Jara, Daniel Serafini, Juan M. Garcia-Garfido
Summary: The primary focus of current research is the development of new electrode materials for supercapacitor devices, with precise control of material proportions being important for large-scale manufacturing. In this study, CrOOH nanoparticles were synthesized with ascorbic acid and combined with reduced graphene oxide to create highly efficient electrode materials for supercapacitors. The resulting composite material achieved the highest specific capacitance of 199.8 mF cm-2 and demonstrated excellent cyclic stability after 10,000 charge/discharge cycles.
Article
Materials Science, Multidisciplinary
Diego Hidalgo-Rojas, Juan Garcia-Garfido, Javier Enriquez, Ricardo Rojas-Aedo, Robert Alastair Wheatley, Ruben A. Fritz, Dinesh P. Singh, Felipe Herrera, Birger Seifert
Summary: Metal-organic frameworks (MOFs) are promising nonlinear optical materials due to their enhanced stability, and the challenge of producing large single crystals with optimal phase matching conditions has been overcome. Millimeter-sized Zn(3-ptz)(2) uniaxial MOF crystals with high transparency and large birefringence have been synthesized. Strong second-harmonic and third-harmonic generation signals were observed for the first time using femtosecond near-infrared pump pulses. The experiments are in agreement with simulations and demonstrate the potential of MOF single crystals for nonlinear optical devices.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Environmental
Shajahan Shanavas, Mohammad Abu Haija, Dinesh Pratap Singh, Tansir Ahamad, Selvaraj Mohana Roopan, Quyet Van Le, Roberto Acevedo, Ponnusamy Munusamy Anbarasan
Summary: In this study, novel 3D/3D/2D-Co3O4/Bi2O3/rGO ternary nanocomposites were successfully synthesized and characterized. The ternary nanocomposite exhibited highly active photocatalytic degradation ability and could be reused multiple times without significant loss in catalytic activity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Victor A. Martinez, Felipe Lozano-Steinmetz, Diego A. Vasco, Paula A. Zapata, Ignacio Chi-Duran, Dinesh Pratap Singh
Summary: Water-based nanofluids prepared with ZnO nanoparticles were characterized for their thermal conductivity, viscosity, and stability. Results showed that nanofluids with 3wt% concentration exhibited improved thermal conductivity and decreased viscosity compared to those with 1wt% concentration. The use of nanofluids in microchannels enhanced heat transfer performance, especially at low Reynolds numbers.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)