Article
Chemistry, Multidisciplinary
Yiwei Sun, Dongfu Wang, Zhouling Wu, Jie Huang, Hongyu Chen, Xueyang Liu
Summary: We demonstrate that ripening can transform highly anisotropic Ag nanorods into Janus nanorods and eventually into spherical nanoparticles. The divergent etching and growth on the Ag nanorods, and the morphology-specific ripening, are explained by expanding the definition of ripening. We study the dependence of ripening on various reaction parameters using a silica shell as the mask and a marker, and find that oxygen, hydroquinone, and Ag+ ions promote ripening by judging the extent of etching on one side of the nanorod. Basically, the redox chemistry provides an additional driving force for ripening by promoting oxidative etching and reductive deposition. We believe that this redox-assisted ripening principle could be generally applied to other systems.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Muhammad Ali Ehsan, Abuzar Khan, Muhammad Nadeem Zafar, Usman Ali Akber, Abbas Saeed Hakeem, Muhammad Faizan Nazar
Summary: In recent years, nickel sulfide impregnated electrocatalysts with auxiliary structural features have been developed as effective alternatives for oxygen evolution reaction (OER) in alkaline medium. Nickel sulfide (NiS) nanowire electrodes grown directly on nickel foam (NF) demonstrated excellent OER activity in 1.0 M KOH solution, with low Tafel value and good stability. The surface of the NiS catalyst was partially modified into nickel oxide after electrolysis, leading to enhanced water oxidation performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Amin Farhadi, Theresa Bartschmid, Gilles R. Bourret
Summary: In this study, thermal dewetting was used to structure gold-based catalytic etching masks for metal-assisted chemical etching (MACE). The approach involved low-temperature dewetting of metal films to generate metal holey meshes with tunable morphologies. Combined with MACE, dewetting-assisted patterning provided a simple route to synthesize Si nanotubes, Si nanowalls, and Si nanowires with defined dimensions and optical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Huimin Liu, Kezhi Li, Hui Chen, Bing Liu, Xuemin Yin
Summary: In this study, oriented SiC nanowires arrays were successfully prepared using a chemical vapor deposition (CVD) approach with Fe(NO3)3 as catalyst. Morphology and structural analyses revealed the growth mechanism and proved the influence of the catalyst. This research has the potential for large-scale preparation of oriented SiC nanowires for applications in toughening materials, field emission, and energy storage.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Asha Yadav, Bo Fu, Stephanie Nicole Bonvicini, Linh Quy Ly, Zhitai Jia, Yujun Shi
Summary: beta-Ga2O3 nanostructures with different morphologies, including nanowires, nanosheets, and nanorods, were successfully synthesized using thermally dewetted Au nanoparticles as catalysts. The growth of the nanostructures was found to be governed by different mechanisms, with the vapor-liquid-solid mechanism governing nanowire growth and the vapor-solid mechanism occurring in the growth of nanosheets and nanorods. The as-grown beta-Ga2O3 nanostructures exhibited high purity, wide bandgap, and strong photoluminescence emission, making them promising for applications in optoelectronic devices such as tunable UV-Vis photodetectors.
Article
Nanoscience & Nanotechnology
Reetendra Singh, Pallellappa Chithaiah, C. N. R. Rao
Summary: This study demonstrates a simple chemical vapor deposition method for the direct growth of crystalline NbO2 films using a freshly prepared Nb-hexadecylamine (Nb-HDA) complex. X-ray diffraction and X-ray photoelectron spectroscopy confirm the NbO2 phase with a distorted rutile body-centered-tetragonal structure and the +4 oxidation state. This method offers a cost-effective process for growing NbO2 films without the need for post-reduction steps.
Article
Chemistry, Multidisciplinary
M. A. Mansoor, K. Munawar, R. Naeem, N. M. Sarih, M. A. Asghar, A. Haider, M. N. M. Zubir, T. Zaharinie
Summary: In this study, a simple and efficient method was presented to fabricate Cr2O3-Mn2O3 composite thin films with immaculate homogeneity for photoelectrochemical (PEC) study. The results showed that the Cr2O3-Mn2O3 thin films had uniformly dispersed crystalline phases and demonstrated improved photocatalytic activity with the increase in deposition temperature. The highest photocurrent density was achieved at 500 degrees C, and the findings may contribute to the development of thin film photoelectrodes for PEC water splitting.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Jian Cao, Chenghao Zhang, Chun Li, Dejun Gao, Xiaoqing Si, Junlei Qi
Summary: A novel method using a combination of anodic aluminium oxide (AAO) templates, AgCuO alloy capillary wetting and hydrothermal reaction has been developed for preparing Ag/CuO composite nanowire arrays. The composite nanowire arrays obtained via the hydrothermal reaction show good electrochemical performance for hydrogen peroxide (H2O2) detection. The Ag nanowire arrays are released and CuO nanowire arrays are grown through the hydrothermal reaction.
Article
Engineering, Chemical
Miao Song, Yafeng Yang, Maoqiao Xiang, Qingshan Zhu, Hongdan Zhao
Summary: The conventional CVD process to fabricate high quality TiC powders faces challenges due to the low conversion rate of TiCl4. To address this issue, TiCl3 was proposed as a precursor and a fluidized bed reactor was utilized to enhance homogeneous nucleation, resulting in the successful fabrication of high purity nanosized TiC powders.
Article
Nanoscience & Nanotechnology
James Huang, Yunil Cho, Zichen Zhang, Antony Jan, Keith T. Wong, Srinivas D. Nemani, Ellie Yieh, Andrew C. Kummel
Summary: Highly selective and smooth TiO2/Al2O3 and HfO2/Al2O3 nanolaminates were successfully deposited by water-free pulsed CVD, achieving high selectivity and smooth films on a nanoscale pattern.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Eric Navarrete, Frank Guell, Paulina R. Martinez-Alanis, Eduard Llobet
Summary: Different thicknesses of Au films were used in the growth of ZnO nanowires, with the 6 nm thick layers showing the most stable and repeatable gas sensing properties. Despite ZnO nanowires grown using the thickest Au layers reaching the highest responses under dry conditions, those grown using the thinnest Au film were more resilient at detecting NO2 in the presence of ambient moisture. The gas sensing results were discussed in light of defects and Au impurities in the ZnO nanowires, as revealed by characterization techniques such as X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Aida Raauf, Jennifer Leduc, Michael Frank, Daniel Stadler, David Graf, Michael Wilhelm, Matthias Grosch, Sanjay Mathur
Summary: In this study, UO2 thin films were synthesized by CVD using a U(VI) precursor, and it was found that the application of magnetic fields can alter the morphology and crystallographic orientation of grains, reduce grain size, promote polycrystalline growth, and decrease surface oxidation of U(IV) centers. The presence of a magnetic field as an extrinsic parameter in the CVD process has a positive effect on controlling the texture and chemical homogeneity of the grown films.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Bin Li, Qiankun Ju, Wenting Hong, Qian Cai, Jinxin Lin, Wei Liu
Summary: The study successfully synthesized a novel molybdenum disulfide using chemical vapor deposition, with the synthesis reaction being carried out in an inert gas environment. The use of a high concentration of molybdenum precursor helped control the morphology of molybdenum disulfide, leading to the innovative method for synthesizing bilayer molybdenum disulfide.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
X. Y. Wang, J. F. Huang, C. H. Yu, F. Y. Li, Z. Y. Cai, Y. Zhang, C. G. Fan, L. Z. Pei
Summary: In this study, DyF3/Bi2O3 nanowires with orthorhombic DyF3 and triclinic Bi2O3 phases were synthesized via a facile hydrothermal route. The synthesized nanowires were characterized and their electrochemical properties were evaluated. The results show that the DyF3/Bi2O3 nanowires exhibit good electro-catalytic activity towards L-cysteine and have potential applications in L-cysteine determination.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Kun Ye, Bochong Wang, Anmin Nie, Kun Zhai, Fusheng Wen, Congpu Mu, Zhisheng Zhao, Jianyong Xiang, Yongjun Tian, Zhongyuan Liu
Summary: The high crystallinity one-dimensional Sb2S3 nanowires were grown on SiO2/Si substrates via CVD technique, showing excellent photodetection properties with a broad photoresponse range and outstanding performance indicators, as well as remarkable switch cycling stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
