Review
Chemistry, Multidisciplinary
Olena Okhay, Alexander Tkach
Summary: This review surveys recent achievements in the development of supercapacitors (SC) based on composites of carbon-derived materials, discussing factors influencing specific capacitance and overviewing specific energy, power, and cycling stability of SC with composite electrode materials.
Article
Materials Science, Multidisciplinary
Somayeh Alikarami, Ali Soltanizadeh, Fereshteh Rashchi
Summary: The Ta2O5-CdS composites with different ratios of Ta2O5/CdS were synthesized and their application in the photodecomposition of RhB/MB was studied. The results showed that Ta2O5-CdS had a cauliflower morphology characterized by XRD, FESEM, EDS, and TEM. DRS analysis indicated a redshift and a decrease in band-gaps for Ta2O5-CdS compared to pure CdS. The BET-specific surface areas of Ta2O5-CdS were higher than pure CdS. Additionally, the Ta2O5-CdS composites demonstrated improved photodecomposition of RhB/MB compared to pure CdS.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Zhenxiang Qiao, Zhifeng Liu, Weiguo Yan, Mengnan Ruan, Zhengang Guo, Xiangfeng Wu
Summary: This study introduces the utilization of the polarization field of Bi2WO6 pyroelectric materials to enhance the photo-electric catalysis performance for dye degradation. The catalytic efficiency significantly increases under specific conditions, showing the potential of using clean energy sources for pollutant degradation and providing new ideas for environmentally friendly electrodes design.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Multidisciplinary
Jia-Hao Shen, Min Shi, Yin Wei
Summary: The combination of visible light photocatalysis and organocatalysis has been widely used in various reactions in recent years. The synergy between visible light photocatalysis and organocatalysis has led to significant progress in modern chemical synthesis. In these dual catalytic systems, photocatalysts or photosensitizers absorb visible light to activate unreactive substrates through electron or energy transfer mechanisms, while organocatalysts are used to control the reactivities of other substrates. This review primarily focuses on the recent advancements in cooperative catalysis by the combination of organocatalysis and photocatalysis in organic synthesis.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Ceramics
Yiwen Zhang, Baogang Guo, Wei Feng, Yuanli Li, Haifeng Liu, Renjie Li, Hongwei Wu, Xiaoyan Zhong, Guohua Ma, Ruishi Xie
Summary: This study synthesized Eu:Bi2WO6 nanostructures with different concentrations of Eu ions and generated CdS on their surface to form Eu:Bi2WO6/CdS composites. The effects of Eu doping on the properties of the composites were studied, clarifying the mechanisms for improving optical and photocatalytic performance. The introduction of Eu3+ altered the band gap of the photocatalyst, while epitaxial CdS decreased recombination probability and improved photocatalytic activity. This research provides new insights for rational design and understanding of atomic-scale complex structures for applications in energy and environmental protection.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Xu Han, Yun-Jie Chu, Man Dong, Weichao Chen, Guanyu Ding, Li-Li Wen, Kui-Zhan Shao, Zhongmin Su, Min Zhang, Xinlong Wang, Guo-Gang Shan
Summary: This study successfully synthesized a copper-based metal-organic framework (CUST-804) photocatalyst with efficient CO2 reduction activity and good recyclability. The experimental results demonstrated that the 5-coordinated Cu site in the coordinated model played a vital role in CO2 reduction, providing fresh insights into efficient copper-functionalized crystalline photocatalysts for CO2 reduction.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zhikun Zhang, Xile Hu
Summary: A catalytic deracemization method for secondary benzylic alcohols has been developed, utilizing sequential photochemical dehydrogenation followed by enantioselective thermal hydrogenation. The combination of a heterogeneous dehydrogenation photocatalyst and a chiral molecular hydrogenation catalyst enables the conversion of racemic aryl alkyl alcohols into their enantiomerically enriched forms.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Cristian Cavedon, Sebastian Gisbertz, Susanne Reischauer, Sarah Vogl, Eric Sperlich, John H. Burke, Rachel F. Wallick, Stefanie Schrottke, Wei-Hsin Hsu, Lucia Anghileri, Yannik Pfeifer, Noah Richter, Christian Teutloff, Henrike Mueller-Werkmeister, Dario Cambie, Peter H. Seeberger, Josh Vura-Weis, Renske M. van der Veen, Arne Thomas, Bartholomaus Pieber
Summary: We demonstrate visible-light-mediated carbon-heteroatom cross-coupling reactions using a photoactive Ni(II) precatalyst. The activation of this precatalyst involves an initial intraligand charge transfer event triggered by visible light irradiation. Additionally, a porous, recyclable organic polymer for heterogeneous nickel catalysis of cross-coupling reactions is obtained through ligand polymerization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Inorganic & Nuclear
Umar Arif, Farman Ali, Ali Bahader, Sharafat Ali, Amir Zada, Fazal Raziq
Summary: This study developed a three-component photocatalyst hetero-junction of Ag-ZnO/g-C3N4 for efficient CO2 reduction. The optimized nano-composite exhibited exceptional visible-light photoactivity, increasing the conversion efficiency of CO2 to CO and methane production.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Biyun Li, Xiaoxiao Gao, Jiangang Qu, Feng Xiong, Hongyun Xuan, Yan Jin, Huihua Yuan
Summary: A photocatalytic antibacterial composite of PDA-rGO/BiVO4 was prepared and showed enhanced bacteriostatic effect against E. coli under light irradiation, indicating potential for expanding the application of BiVO4 in biomedicine.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Dario Filippini, Mattia Silvi
Summary: The study presents a visible-light-mediated and transition metal-free olefination process using a defined alkene geometry to cross-couple complex molecular scaffolds containing carboxylic acids and aldehydes. By merging the Wittig reaction and photoredox catalysis, it enables rapid structural diversification of bioactive molecules and natural products with high functional group tolerance and the formation of a new alkene functional group with programmable E-Z stereochemistry.
Review
Chemistry, Applied
Jitender Singh, Anuj Sharma
Summary: Functionalized oxindoles are important heterocyclic structures found in many natural products and are key intermediates in drug synthesis. Visible light mediated methodologies for the synthesis of oxindoles have received significant attention and show promise for future applications.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Organic
Ming Zheng, Jing Hou, Li-Li Hua, Wan-Ying Tang, Le-Wu Zhan, Bin-Dong Li
Summary: This study presents a visible-light-mediated divergent 1,2-silylfunctionalization of alkenes under ambient conditions, yielding a variety of silanes including beta-alkoxy, beta-alkylthio, beta-hydroxy, and beta-indolyl silanes. Vinylsilanes were also successfully prepared without the need for an additional nucleophile.
Article
Chemistry, Organic
Yu Zhang, Jiahui Qian, Miao Wang, Yahao Huang, Peng Hu
Summary: An efficient and low-cost protocol for the direct decarboxylative fluorination of aliphatic carboxylic acids catalyzed by iron salts under visible light is presented. This new method is highly efficient and scalable, and mechanistic studies have revealed the generation process of the key step.
Article
Chemistry, Multidisciplinary
Wenzhao Zhang, Sanzhong Luo
Summary: A zirconium-catalyzed de Mayo reaction under visible light conditions was developed without the need for external photosensitizers and additives.
CHEMICAL COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Nishi Mehak, Bindu Rani, Aadil Fayaz Wani, Shakeel Ahmad Khandy, Ajay Singh Verma, Atif Mossad Ali, M. A. Sayed, Shobhna Dhiman, Kulwinder Kaur
Summary: In this study, the electronic, structural, and thermoelectric properties of newly designed layered rare-earth metal germanide halides were investigated. The materials showed promising thermoelectric performance, making them suitable candidates for energy harvesting in thermoelectric applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Devidas I. Halge, Vijaykiran N. Narwade, Nabeel M. S. Kaawash, Pooja M. Khanzode, Sohel J. Shaikh, Jagdish W. Dadge, Prashant S. Alegaonkar, Rajeshkumar S. Hyam, Kashinath A. Bogle
Summary: This study presents the design and fabrication of a high-performance blue light photodetector using an n-type cadmium sulfide (CdS) thin film and a p-type polyaniline (PANI). The photodetector demonstrates exceptional performance characteristics, including high responsivity, detectivity, and sensitivity, along with rapid response time and rectification behavior. The research represents a significant advancement in the field of high-performance photodetectors.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Da Hu, Jiabin Lu, Qiusheng Yan, Yingrong Luo, Ziyuan Luo
Summary: This study introduces a chemical mechanical polishing technique based on metal electrochemical corrosion for single-crystal SiC to address the environmental pollution caused by the polishing solution in chemical mechanical polishing. Wear experiments were conducted to investigate the wear properties of SiC C-surface under different grinding ball materials and solutions. The proposed mechanism of material removal in single-crystal SiC via metal electrochemical corrosion was discussed.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Lifang Mei, Long Lin, Dongbing Yan, Yu Liang, Yu Wu, Shuixuan Chen
Summary: This paper investigates the removal of CuO particles from silicon wafer surfaces using a picosecond laser. Numerical calculations and experimental research were conducted, and a thermal-stress coupled finite element model was established. The results show that as the laser energy density increases, the removal rate of CuO particles initially increases and then decreases, while the roughness of the silicon substrate decreases and then increases.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Michihiro Yamada, Shuhei Kusumoto, Atsuya Yamada, Kentarou Sawano, Kohei Hamaya
Summary: In this study, we demonstrated the low-temperature growth of a Ge layer on a Co-based Heusler alloy via Sn doping, which improved the magnetic properties and spin signal.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Xiang-Long Wei, Bao-Feng Shan, Zong-Yan Zhao
Summary: This study synthesized and characterized a CuAlO2/CuGaO2 heterostructure and evaluated its photocatalytic performance. The heterostructure exhibited superior performance compared to individual CuAlO2 and CuGaO2 photocatalysts, with increased carrier concentration, enhanced redox capabilities, superior electrochemical stability, and reduced interfacial resistance. Photocatalytic experiments demonstrated the remarkable oxidation potential and notable reduction activity of the heterostructure, outperforming CuAlO2 and CuGaO2 in degradation rates and hydrogen production rates, respectively. These findings highlight the superior performance and broad applicability of the CuAlO2/CuGaO2 heterostructure in various photocatalytic reactions.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Micka Bah, Daniel Alquier, Marie Lesecq, Nicolas Defrance, Damien Valente, Thi Huong Ngo, Eric Frayssinet, Marc Portail, Jean-Claude De Jaeger, Yvon Cordier
Summary: This study investigates the AlN nucleation layer issue in GaN high frequency telecommunication and power switching systems fabricated after heteroepitaxy on Silicon or Silicon Carbide. It is shown that using 3C-SiC as an intermediate layer can significantly decrease RF propagation losses. Measurements and analyses demonstrate that dopant diffusion into the 3C-SiC pseudo-substrate is confined beneath the interface, and a slightly conductive zone is present beneath the AlN/3C-SiC interface, explaining the low propagation losses obtained for the devices. This work highlights the importance and efficiency of the 3C-SiC intermediate layer as a pseudo-substrate.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Shuang Wang, Lijun Wu, Zhiqing Wang, Ziyue Qian
Summary: The geometric structure and electrical properties of zigzag and armchair DWSiNT perfect tubes with different Stone-Wales defects were simulated using the SCC-DFTB method. It was found that the atomic arrangement, stability, energy gap, and charge distribution strongly depend on the type of tube. The effects of strong and weak electric fields on the tubes were also investigated, showing different impact on stability and energy gap. These findings have implications for future experimental studies.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Nanda Kumar Reddy Nallabala, Sunil Singh Kushvaha, Sambasivam Sangaraju, Venkata Krishnaiah Kummara
Summary: This study focuses on the preparation and performance of MIS-type high-k dielectric oxide-based UV photodetectors. The researchers found that the Au/Ta2O5/GaN devices prepared on Ta2O5/GaN heterojunction with post-annealing exhibited improved photoresponsivity, EQE, and rise/fall times. This improvement is attributed to the optimized band configuration of the Ta2O5/GaN heterostructure and the effect of post-annealing on photogenerated charge carriers.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Jean-Francois Michaud, Marc Portail, Daniel Alquier, Dominique Certon, Isabelle Dufour
Summary: This paper reviews the use of MEMS devices without sensitive layers in gas detection applications. These devices can measure a physical property of the gas to determine its concentration, and have the advantages of generality and high detection limits.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Kanyu Yang, Chaojie Shi, Ruizhao Tian, Haoyue Deng, Jie He, Yangyang Qi, Zhengchun Yang, Jinshi Zhao, Zhen Fan, Jun Liu
Summary: This study investigates the electrical and synaptic properties of Ag/TiO2 nanorod/FTO-based RRAM devices, focusing on the impact of different seed layer thicknesses on nanorod thickness and RRAM performance. The devices show remarkable achievements in terms of endurance, self-compliance, and resistance switching ratio. The switching mechanism is attributed to space-charge-limited conduction resulting from electron trapping in oxygen vacancy traps. The devices also maintain stable synaptic properties even after undergoing multiple cycles of long-term potentiation and depression.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Karthickraj Muthuramalingam, Wei-Chih Wang
Summary: This study presents a non-destructive approach using terahertz time-domain spectroscopy (THz-TDS) to estimate the electrical properties of semi-insulating compound semiconductors. The study successfully measures the resistivity and carrier concentration of semi-insulating Silicon Carbide (SiC) and Indium Phosphide (InP) wafers using THz-TDS in transmission mode. The simplified Drude model and the Nelder-Mead algorithm are employed to estimate the electrical properties, and the results are in accordance with the manufacturer specifications. The feasibility of non-destructive mapping of the electrical properties is demonstrated, offering a promising tomographic inspection approach for online monitoring.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Pengfei Wei, Rui Tong, Xiaofeng Liu, Yao Wei, Yongan Zhang, Xu Liu, Jian Dai, Haipeng Yin, Dongming Liu
Summary: This study investigates the influence of SiNx and SiOxNy as rear-side passivation films on the performance of PERC+ cells. SiNx film is found to have better passivation performance and resistance to aluminum paste erosion, while SiOxNy film exhibits better optical performance. By designing multi-layer SiNx/SiOxNy/SiNx stacks, the cells' efficiency and bifaciality are significantly improved.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Shuangting Ruan, Xiaolan Li, Wen Cui, Zhihui Zhang, Zhihui Xu, Huanqi Cao, Shougen Yin, Shishuai Sun
Summary: Integrating photosensitive electrode materials can effectively improve the low temperature tolerance and enhance energy density and power density. The surface morphology reconstruction technique can increase the active surface area and improve electrolyte contact, leading to higher specific capacity. Additionally, the electrodes demonstrate excellent photoelectric and photothermal conversion abilities, allowing the supercapacitor to maintain high energy density even at low temperatures.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Review
Engineering, Electrical & Electronic
Ashmalina Rahman, James Robert Jennings, Mohammad Mansoob Khan
Summary: This review provides a comprehensive overview of the synthesis and applications of nanostructured CuInS2 in photocatalytic applications. Various strategies, including the introduction of dopants, surface decoration, and heterojunction formation, have been summarized to improve the photocatalytic performance of CuInS2. However, scientific challenges such as the high carrier recombination rate limit the broad application of CuInS2.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)