Asymmetric Supercapacitors Based on Co₃O₄@MnO₂@PPy Porous Pattern Core-Shell Structure Cathode Materials

Wang, Zihan,Pan, Shuang,Wang, Bing,Qi, Jingang,Tang, Lidan,Liu, Liang The Korean Electrochemical Society 2021 Journal of electrochemical science and technology Vol.12 No.3

In recent years, supercapacitors have been developed rapidly as a rechargeable energy storage device. And the performance of supercapacitors is depending on electrode materials, the preparation method and performance of electrode materials have become the primary goal of scientific development. This study synthesizes Co₃O₄@MnO₂@PPy cathode material with porous pattern core-shell structure by hydrothermal method and electrodeposition. The result samples are characterized by X-ray diffraction transmission/scanning electron microscope, and X-ray photoelectron spectroscopy. Electrochemical evaluation reveals that electrochemical performance is significantly enhanced by PPy depositing. The specific capacitance of Co₃O₄@MnO₂@PPy is 977 F g^-1 at 1 A g^-1, the capacitance retention rate of 105%. Furthermore, the electrochemical performance of Co₃O₄@MnO₂@PPy//AC asymmetric supercapacitor assembles with AC as the negative electrode material is significantly better than that of MnO₂//AC and Co₃O₄@MnO₂//AC. The capacity of Co₃O₄@MnO₂@PPy//AC is 102.78 F g^-1. The capacity retention rate is still 120% for 5000 charge-discharge cycles.

Preparation of Fe-Co-P-Gr/NF coating via electroless composite plating as efficient electrocatalysts for overall water splitting

Kaihang Wang,Kaili Sun,Zihan Li,Zunhang Lv,Tianpeng Yu,Xin Liu,Guixue Wang,Guangwen Xie,Luhua Jiang 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.2

The development of electrocatalysts with high activity and low Tafel slope for overall water splitting has become a crucialchallenge to exploit the sustainable energy. Herein, we construct a Fe–Co–P–Gr catalyst on nickel foam (NF) support throughelectroless composite plating to realize the co-deposition of Fe–Co–P alloys and graphene quantum dots. Interestingly,graphene quantum dots exhibit obvious eff ects on electron mobility and active sites of Fe–Co–P–Gr/NF catalyst. In oxygenevolution reaction, the Fe–Co–P–Gr/NF catalyst exhibits a small overpotential of 230 mV at 10 mA cm −2 and fast kineticswith Tafel slope of 37.8 mV dec −1 . Meanwhile, the Fe–Co–P–Gr/NF also has a superior hydrogen evolution reaction performancein 1.0 M KOH. Compared with the Fe–Co–P alloys, the Fe–Co–P–Gr/NF both as the anode and cathode requireonly 1.58 V to reach a current density of 10 mA cm −2 . The successful preparation of Fe–Co–P–Gr/NF electrode throughelectroless composite deposition provides a new path to manufacture electrocatalysts for overall water splitting.

Long non-coding RNA H19X promotes tumorigenesis and metastasis of colorectal cancer through regulating the miR-503-5p/KANK1 axis

Yuan Zihan,Zhao Haizhou,Zhi Qiaoming,Wang Sentai,Liu Chao,Han Ye,Xu Zhihua,Liu Fei,Liu Xingyi,Zan Xinquan,Wang Qiang,Wan Daiwei 한국유전학회 2022 Genes & Genomics Vol.44 No.12

Background: It has been well established that the long non-coding RNAs (lncRNAs) plays a critical role in tumor progression. However, the function of these transcripts and mechanisms responsible for their deregulation in colorectal cancer (CRC) remain to be investigated. Objective: To explore the potential effect and regulation mechanism of lncRNA H19X in colorectal cancer. Methods: We predicted and validated long non-coding RNA H19X from microarray data of colorectal cancer tissues. In addition, the biological behaviors of H19X and miR-503-5p on CRC were examined in vitro and in vivo, including MTT, colony formation assay, Hoechst33342 and transwell assay. The mRNA and protein levels of KN Motif and Ankyrin Repeat Domains 1 (KANK1) were analyzed by Quantitative real-time PCR (qRT-PCR), western blotting (WB) assay. Moreover, bioinformatics tools and dual-luciferase reporter assay were applied to demonstrate the relationship between KANK1 and miR-503-5p. Results: H19X was remarkably up-regulated in CRC tissues. Its expression related to tumor size (p = 0.041), lymph node metastasis (p = 0.037), distal metastasis (p = 0.028), advanced TNM stage (p = 0.034) and poor survival in CRC. H19X acted as an oncogenic lncRNA that induced CRC cell proliferation, invasion and metastasis. Through a number of functional studies, we found that H19X silencing inhibited the malignance phenotype of cancer cells through loss of miR-503-5p. Further studies demonstrated that miR-503-5p was involved in the progression of CRC by directly regulating the downstream target KANK1. Conclusion: Collectively, the findings of the present study indicate H19X/miR-503-5p/KANK1 axis has critical role in the progression of colorectal cancer, providing an effective prognostic indicator and promising target in treatment of colorectal cancer.

Redeposition mechanism on silicon oxide layers during selective etching process in 3D NAND manufacture

Zihan Zhou,Yunwen Wu,Huiqin Ling,Jie Guo,Su Wang,Ming Li 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-

3D NAND flash memory with vertically stacked cells has been developed to break through the limits oftechnology nodes. However, during the selective etching process, it is difficult to ensure the byproductsdiffuse away from the trenches in the multistacked layers. Once saturated, the byproduct causes abnormalredeposition on the SiO2 layers. This problem has restricted the development of high-density 3DNAND memory. To solve this problem, the composition and formation mechanism of the redepositedlayer must be clarified. In this study, a ternary-wafer system comprising a Si3N4/SiO2/Si3N4 stack was fabricatedto study the redeposition mechanism, and the morphology, elastic properties, and chemical compositionof the redeposited layer were clarified. The redeposited layer consists of spherical particles withelastic surfaces (average Young’s modulus of 24.17 GPa). The particles were confirmed to comprise colloidalsilica gel covered by silanols. By considering the chemistry of silica, the redeposition mechanismwas proposed as follows: colloidal silica gel is formed by the aggregation of silicic acids from Si3N4 etching,which adsorb onto the SiO2 layer through oxide bridges and hydrogen bonding. Our work will contributeto the development of high-density 3D NAND memory.

An Analysis of the Lacquer Art of the Exported Folding Fans of the Qing Dynasty in China

Jinling Wang,Zihan Yang 한국디자인학회 2021 디자인학연구 Vol.34 No.3

A New Method for Measuring Refractive Index with a Laser Frequency-shifted Feedback Confocal Microscope

Zhou, Borui,Wang, Zihan,Shen, Xueju Optical Society of Korea 2020 Current Optics and Photonics Vol.4 No.1

In this paper, a new method is presented to measure the refractive index of single plain glass or multilayered materials, based on a laser frequency-shifted confocal feedback microscope. Combining the laser frequency-shifted feedback technique and the confocal effect, the method can attain high axial-positioning accuracy, stability and sensitivity. Measurements of different samples are given, including N-BK7 glass, Silica plain glass, and a microfluidic chip with four layers. The results for N-BK7 glass and Silica plain glass show that the measurement uncertainty in the refractive index is better than 0.001. Meanwhile, the feasibility of this method for multilayered materials is tested. Compared to conventional methods, this system is more compact and has less difficulty in sample processing, and thus is promising for applications in the area of refractive-index measurement.

A Survey of Chinese Pakistani Research Centres in the Context of Belt and Road Initiative: a Case Study of Two Pakistani Research Centres in Chinese Universities

Jun Tang,Zihan Gong,Yan Wang 아시아사회과학학회 2023 Jornal of Asia Social Science Vol.11 No.1

The China-Pakistan Economic Corridor (CPEC), a flagship project of the Belt and Road Initiative (BRI), has substantially influenced Pakistan's economic development and its relationship with China. In the wake of CPEC's 10th anniversary, Chinese universities have established 21 research centers dedicated to studying Pakistan, reflecting a deepening of academic ties between the two nations. This paper delves into the specific case studies of two such centers, the Pakistani Studies Center at Northern Minzu University and the Pakistan Research Centre at Inner Mongolia Honder College of Arts and Sciences, examining their objectives, research areas, contributions, and challenges. Through a comprehensive analysis, this study showcases the diverse research areas of these centers, encompassing multiple dimensions such as decision-making support, strategic cooperation, cultural studies, educational exchanges, diplomacy, security, and resource development. The comparative analysis reveals distinctions in their levels of influence, with one operating at the national level and the other at the university level, contributing significantly to both broader policy discussions and localized cooperation. Moreover, it highlights their unique academic achievements, their roles in fostering international collaborations, and the challenges they face, including team construction, funding limitations, and limited research focus. The findings underscore the pivotal role these research centers play in advancing China-Pakistan relations within the BRI framework. Insights gleaned from this analysis offer valuable guidance for policymakers and stakeholders to enhance the impact and effectiveness of these research centers in furthering the collaboration between China and Pakistan.

Selective Attentional Networks Deficits in Parents of Children With Autism Spectrum Disorder: Evidence From Attention Network Test

Tian Qin,Zihan Wang,Xiaoming Li,Shunhua Zhang 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.8

Objective We primarily aimed to investigate the attention network function among parents of children with autism spectrum disorder (ASD) using the Attention Network Test (ANT). The secondary objective was to observe whether the three attention networks of all participants were related to each other.Methods We included 28 parents of children with ASD and 28 well-matched parents of typically developing children. All participants underwent the neuropsychological assessment and ANT test. The three distinct attention networks, including alerting, orienting, and executive control, were also measured.Results Compared with controls, parents of children with ASD showed less-efficient alerting and executive control network (all p<0.05), but not orienting network (p=0.74). No significant correlation was found between the alerting, orienting, and executive control network for either group.Conclusion Our findings showed that parents of children with ASD had deficits in alerting and executive control attention functions. The deficits are indications of a broad autism phenotype.

A New Method for Measuring Refractive Index with a Laser Frequency-shifted Feedback Confocal Microscope

Borui Zhou,Zihan Wang,Xueju Shen 한국광학회 2020 Current Optics and Photonics Vol.4 No.1

In this paper, a new method is presented to measure the refractive index of single plain glass or multilayered materials, based on a laser frequency-shifted confocal feedback microscope. Combining the laser frequency-shifted feedback technique and the confocal effect, the method can attain high axialpositioning accuracy, stability and sensitivity. Measurements of different samples are given, including N-BK7 glass, Silica plain glass, and a microfluidic chip with four layers. The results for N-BK7 glass and Silica plain glass show that the measurement uncertainty in the refractive index is better than 0.001. Meanwhile, the feasibility of this method for multilayered materials is tested. Compared to conventional methods, this system is more compact and has less difficulty in sample processing, and thus is promising for applications in the area of refractive-index measurement.

Distinct Transcriptional and Functional Differences of Lung Resident and Monocyte-Derived Alveolar Macrophages During the Recovery Period of Acute Lung Injury

Hou Fei,Wang Huan,Zheng Kun,Yang Wenting,Xiao Kun,Rong Zihan,Xiao Junjie,Li Jing,Cheng Baihe,Tang Li,Xie Lixin 대한면역학회 2023 Immune Network Vol.23 No.3

In acute lung injury, two subsets of lung macrophages exist in the alveoli: tissue-resident alveolar macrophages (AMs) and monocyte-derived alveolar macrophages (MDMs). However, it is unclear whether these 2 subsets of macrophages have different functions and characteristics during the recovery phase. RNA-sequencing of AMs and MDMs from the recovery period of LPS-induced lung injury mice revealed their differences in proliferation, cell death, phagocytosis, inflammation and tissue repair. Using flow cytometry, we found that AMs showed a higher ability to proliferate, whereas MDMs expressed a larger amount of cell death. We also compared the ability of phagocytosing apoptotic cells and activating adaptive immunity and found that AMs have a stronger ability to phagocytose, while MDMs are the cells that activate lymphocytes during the resolving phase. By testing surface markers, we found that MDMs were more prone to the M1 phenotype, but expressed a higher level of pro-repairing genes. Finally, analysis of a publicly available set of single-cell RNA-sequencing data on bronchoalveolar lavage cells from patients with SARS-CoV-2 infection validated the double-sided role of MDMs. Blockade of inflammatory MDM recruitment using CCR2−/− mice effectively attenuates lung injury. Therefore, AMs and MDMs exhibited large differences during recovery. AMs are long-lived M2-like tissue-resident macrophages that have a strong ability to proliferate and phagocytose. MDMs are a paradoxical group of macrophages that promote the repair of tissue damage despite being strongly pro-inflammatory early in infection, and they may undergo cell death as inflammation fades. Preventing the massive recruitment of inflammatory MDMs or promoting their transition to pro-repairing phenotype may be a new direction for the treatment of acute lung injury.