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Janus MXene film with gradient structure for highly efficient terahertz and infrared electromagnetic absorption

Nano Research 2025年第1期18卷 434-442页

作者： Shaodian Yang Weiqiang Huang Zhiqiang Lin Zibo Chen Rongliang Yang Yi Jia Xuebin Liu Rui Wang zhiping zeng Yougen Hu Huanjun Chen Xuchun Gui11 State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China China Academy of Aerospace Science and Innovation Beijing 100176China Guangdong Province Key Laboratory of Display Material and Technology Guangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Electromagnetic interference (EMI) shielding inhigh-frequency range, especially the rapidly growing terahertz(THz) frequency range, attracts increasing attention due tothe potential application of terahertz in 6G wirelesscommunication, and security inspection. However, traditionalconductive EMI films typically achieve high shieldingeffectiveness through strong reflection, which may causesecondary pollution to other devices. Here, a gradientstructure strategy was proposed to constructTi_(3)C_(2)Tx/hydroxypropyl methyl cellulose (HPMC) film, in whichthe content of Ti_(3)C_(2)Tx gradually increases along the thicknessdirection, resulting in different conductivity of the two surfaces(surface-M and surface-H) for the film. The obtained gradientfilmexhibits an EMI shielding efficiency of over 48.5 dB in theTHz range (0.2-1.6 THz) at a thickness of 40 μm. Especially,as the THz waves incident from the surface-H to the film, the absorption effectiveness reaches 48.2 dB (average absorbedpower loss up to 91.4%), and the reflection effectiveness is only 0.3 dB. In additions, the gradient-film also demonstrates ahigh absorption rate of 95.5% in the infrared band (2.5-16.7 μm). Moreover, the gradient-film exhibits an excellent tensilestress and Young’s modulus value of 173.1 MPa and 2.8 GPa, respectively. Therefore, the gradient-film proposed in thiswork, with excellent electromagnetic absorption in both THz and infrared band, provides a promising candidate for the nextgenerationEMI shielding applications.

关键词： electromagnetic interference shielding Janus film terahertz MXene

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Key Elements Controlling Oil Accumulation within the Tight Sandstones

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Journal of Earth Science 2015年第3期26卷 328-342页

作者： Haiyan Hu zhiping zeng Jianzhang Liu School of Geosciences Yangtze University Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences Research Center of New District in West China Shengli Oilfield Company of SINOPEC

Tight oil sandstone reservoirs with low porosity and permeability, which are an unconventional petroleum resource, have been discovered in the Jurassic intervals of the central Junggar Basin, the northwestern China. To reveal the accumulation mechanism, a relatively comprehensive research was conducted, including oil-source correlation, porosity evolution, and hydrocarbon charging history. The results show that crude oil of these tight sandstone reservoirs were mainly from Permian source rocks with some contribution from Jurassic source rocks. The reservoirs were buried at shallow depth（〈3 100 m） and exposed to weak diagenesis, and thus had high porosity（18.5%） when the Permian-sourced oil from Permian source rock was charging, indicating high GOI values（〉5%）. In contrast, the sandstone reservoir had already become tight and did not provide available space to accumulate oil due to severe compaction and cementation when hydrocarbon from Jurassic source rock filled, evidenced by low GOI values（〈5%）. Therefore, reservoir porosity controls the oil accumulation within tight sandstone. Whether tight sandstone reservoirs accumulate oil depends on the reservoir quality when hydrocarbons charge. Before the exploration of tight oil sandstone reservoirs, it should be required to investigate the relationship between oil charging history and porosity evolution to reduce the exploration risk and figure out the available targets.

关键词： tight oil sandstone reservoir hydrocarbon charging history accumulation mechanism porosity evolution Junggar Basin

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Three-dimensional multimodal sub-diffraction imaging with spinning-disk confocal microscopy using blinking/ fluctuating probes

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Nano Research 2015年第7期8卷 2251-2260页

作者： Xuanze Chen zhiping zeng Hening Wang Peng Xi Department of Biomedical Engineering College of Engineering Peking University Beijing 100871 China These authors contributed equally to this work.

Three-dimensional imaging cannot be achieved easily using previously developed localization super-resolution techniques. Here, we present a three-dimensional multimodal sub-diffraction imaging technique with spinning-disk （SD） confocal microscopy called 3D-MUSIC, which not only has all the advantages of SD confocal microscopy such as fast imaging speed, high signal-to-noise ratio, and optical-sectioning capability, but also extends its spatial resolution limit along all three dimensions. Both axial and lateral resolution can be improved simul- taneously by virtue of the blinking/fluctuating nature of modified fluorescent probes, exemplified with the quantum dots. Further, super-resolution images with dual modality can be obtained through super-resolution optical fluctuation imaging （SOFI） and bleaching/blinking-assisted localization microscopy （BALM）. Therefore, fast super-resolution imaging can be achieved with SD-SOFI by capturing only 100 frames while SD-BaLM yields high-resolution imaging.

关键词： multi-modality super-resolution microscopy three-dimensional spinning-disk confocal

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Laser-Induced Methanol Decomposition for Ultrafast Hydrogen Production

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Research 2024年第1期2023卷 131-137页

作者： Weiwei Cao Yinwu Li Bo Yan zhiping zeng Pu Liu Zhuofeng Ke Guowei Yang State Key Laboratory of Optoelectronic Materials and Technologies Nanotechnology Research CenterSun Yat-sen UniversityGuangzhou 510275P.R.China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275P.R.China

Methanol(CH_(3)OH)is a liquid hydrogen(H_(2))source that effectively releases H_(2) and is convenient for *** thermocatalytic CH_(3)OH reforming reaction is used to produce H_(2),but this process needs to undergo high reaction temperature(e.g.,200℃)along with a catalyst and a large amount of carbon dioxide(CO_(2))*** photocatalysis and photothermal catalysis under mild conditions are proposed to replace the traditional thermal catalysis to produce H_(2) from CH_(3)OH,they still inevitably produce CO_(2) emissions that are detrimental to carbon ***,we,for the first time,report an ultrafast and highly selective production of H_(2) without any catalysts and no CO_(2) emission from CH_(3)OH by laser bubbling in liquid(LBL)at room temperature and atmospheric pressure.

关键词： catalysis reforming replace

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Cross-cumulant enhanced radiality nanoscopy for multicolor superresolution subcellular imaging

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Photonics Research 2020年第6期8卷 893-898页

作者： zhiping zeng JING MA CANHUA Xu College of Physics and Information Engineering Fuzhou UniversitFuzhou 350108China

Fluorescence fuctuation-based superresolution techniques can achieve fast superresolution imaging on a cost-effective wide-field platform at a low light level with reduced ***,the current methods exhibit certain imaging deficiencies that misinterpret nanoscale features reconstructed from fluctuating image scquences,thus degrading the superresolution imaging quality and *** we propose Cross-cumulant enhanced radiality nanoscopy(CERN),which employs cross cumulant analysis in tandem with radiality *** demonstrated that CERN can significantly improve the spatial resolution at a low light level while eliminating the misinterpretations of nanoscale features of the existing fluctuation-based superresolution *** the experiment,we further verified the superior performance of CERN over the current methods through performing multicolor superresolution imaging of subcellular microtubule networks and clathrin-coated pits as well as the high-precision reconstruction of densely packed RNA transcripts.

关键词： radial resolution packed

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Intrinsic apoptotic pathway and G2/M cell cycle arrest involved in tubeimoside I-induced EC109 cell death

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Chinese Journal of Cancer Research 2013年第3期25卷 312-321页

作者： Yang Xu Guanghui Wang Quancheng Chen Ting Lin zhiping zeng Qiang Luo Jie Liu Cuiling Sun School of Pharmaceutical Sciences Xiamen University

Objective： Squamous esophageal carcinoma is highly prevalent in developing countries, especially in China. Tu Bei Mu （TBM）, a traditional folk medicine, has been used to treat esophageal squamous cell carcinoma （ESCC） for a long term. tubeimoside I （TBMS1） is the main component of TBM, exhibiting great anticancer potential. In this study, we investigated the mechanism of TBMS1 cytotoxic effect on EC109 cells. Methods： Comparative nuclear proteomic approach was applied in the current study and we identified several altered protein spots. Further biochemical studies were carried out to detect the mitochondrial membrane potential, cell cycle and corresponding proteins＇ expression and location. Results： Subcellular proteomic study in the nucleus from EC109 cells revealed that altered proteins were associated with mitochondrial function and cell proliferation. Further biochemical studies showed that TBMSl-induced molecular events were related to mitochondria-induced intrinsic apoptosis and P21-cyclin B 1/cdc2 complex-related G2/M cell cycle arrest. Conclusions： Considering the conventional application of TBM in esophageal cancer, TBMS1 therefore may have a great potential as a chemotherapeutic drug candidate for ESCC.

关键词： Anticancer drug G2/M cell cycle arrest intrinsic apoptosis subcellular proteomics and tubeimoside I(TBMS 1)

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Clinical outcomes of ATP-tumor chemosensitivity assay directed chemotherapy in hepatocellular carcinoma

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Frontiers of Medicine 2007年第2期1卷 157-160页

作者： RAO Rongsheng CHEN Wenxue ZHOU Xinwen ZHOU Zheng LI Xiaojun zeng zhiping Jiangxi Province Liver Tumor Treatment Center Nanchang 330029China

This study aims to investigate the clinical response of ATP tumor chemosensitivity assay(ATP-TCA)directed chemotherapy regimens delivered via hepatic artery infusion in 104 cases of primary liver carcinoma(PLC).Tumor tissue was obtained via laparotomy and cultivated in *** tissue was put through the assay to determine chemosensitivity.A single drug regimen of either 5-FU,MMC and ADM and a combination drug regimen were *** treatment assigned was dependent on the result of the *** the control group,30 cases of diagnosed PLC were given the conventional three-combination *** two groups were evaluated after three courses of *** results are as *** overall response rate of sensitivity test ranged from 36%to 44%in the single drug therapy groups and 81%in the combination drug *** clinical overall response rate was 75%in the treatment group and 56%in control *** treatment group had better results than the control group as survival period over six months was 80% and over one year 44%.In the control group,survival period over six months was 60% and 30% over one *** short,ATP-TCA directed chemotherapy shows better results for terminal stages of PLC in that you can decrease the dose of drugs thereby reducing the side-effects with possible improvements in therapeutic effects.

关键词： carcinoma hepatocellular tumor stem cell assay chemotherapy

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Flexible, Transparent and Conductive Metal Mesh Films with Ultra‑High FoM for Stretchable Heating and Electromagnetic Interference Shielding

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Nano-Micro Letters 2024年第5期16卷 201-213页

作者： Zibo Chen Shaodian Yang Junhua Huang Yifan Gu Weibo Huang Shaoyong Liu Zhiqiang Lin zhiping zeng Yougen Hu Zimin Chen Boru Yang Xuchun Gui State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople’s Republic of China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China

Despite the growing demand for transparent conductive films in smart and wearable electronics for electromagnetic interference(EMI)shielding,achieving a flexible EMI shielding film,while maintaining a high transmittance remains a significant ***,a flexible,transparent,and conductive copper(Cu)metal mesh film for EMI shielding is fabricated by self-forming crackle template method and electroplating *** Cu mesh film shows an ultra-low sheet resistance(0.18Ω□^(-1)),high transmittance(85.8%@550 nm),and ultra-high figure of merit(>13,000).It also has satisfactory stretchability and mechanical stability,with a resistance increases of only 1.3%after 1,000 bending *** a stretchable heater(ε>30%),the saturation temperature of the film can reach over 110°C within 60 s at 1.00 V applied ***,the metal mesh film exhibits outstanding average EMI shielding effectiveness of 40.4 dB in the X-band at the thickness of 2.5μ*** a demonstration,it is used as a transparent window for shielding the wireless communication electromagnetic ***,the flexible and transparent conductive Cu mesh film proposed in this work provides a promising candidate for the next-generation EMI shielding applications.

关键词： Metal mesh Transparent conductive film Stretchable heater Electromagnetic interference shielding

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基于荧光随机涨落的超分辨显微成像

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中国激光 2018年第3期45卷 89-99页

作者：曾志平福州大学物理与信息工程学院福建福州350116

基于荧光随机涨落的超分辨显微成像技术具有成像速度快、空间分辨率高、系统成本低和光毒性小的成像优势,在对生物亚细胞结构及其动态运动过程的成像和监测中具有广阔的应用前景。近年来,基于荧光发射的间歇性,发展出多种图像重建算法... 详细信息

基于荧光随机涨落的超分辨显微成像技术具有成像速度快、空间分辨率高、系统成本低和光毒性小的成像优势,在对生物亚细胞结构及其动态运动过程的成像和监测中具有广阔的应用前景。近年来,基于荧光发射的间歇性,发展出多种图像重建算法实现荧光涨落超分辨成像,在无须对传统的荧光显微镜做任何硬件改造的情况下,显著提升了光学成像的空间分辨率,实现了突破光学衍射极限的超分辨成像。从重建算法、成像速度、分辨率提升和图像重建质量等方面,对比分析不同类型荧光涨落超分辨方法的差异和适用范围,为生命科学研究人员针对特定的生物学问题选择最佳的超分辨方法提供参考依据。

关键词：医用光学图像处理超分辨成像荧光涨落衍射极限空间分辨率

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Controlling sulfurization of 2D Mo_(2)C crystal for Mo_(2)C/MoS_(2)-based memristor and artificial synapse

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npj Flexible Electronics 2022年第1期6卷 917-924页

作者： Xin Tang Leilei Yang Junhua Huang Wenjun Chen Baohua Li Shaodian Yang Rongliang Yang zhiping zeng Zikang Tang Xuchun Gui State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Department of physics Guangxi Minzu UniversityNanning 530006China School of Electronic Information Engineering Foshan UniversityFoshan 528000P.R.China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078China

Owing to the conductance-adjustable performance,the emerging two-terminal memristors are promising candidates for artificial synapses and brain-spired neuromorphic *** memristors based on molybdenum disulfide(MoS_(2))have displayed outstanding performance,such as thermal stability and high energy efficiency,reports on memristors based on MoS_(2) as the functional layer to simulate synaptic behavior are ***,a homologous Mo_(2)C/MoS_(2)-based memristor is prepared by partially sulfuring two-dimensional Mo_(2)C *** memristor shows good stability,excellent retention(~104 s)and endurance(>100 cycles),and a high ON/OFF ratio(>10^(3)).Moreover,for comprehensively mimicking biological synapses,the essential synaptic functions of the device are systematically analyzed,including paired-pulse facilitation(PPF),short-term plasticity(STP),long-term plasticity(LTP),long-term depression(LTD),and the transitions from STP to ***,this artificial synapse could keep a highlevel stable memory for a long time(60 s)after repeated *** results prove that our device is highly desirable for biological synapses,which show great potential for application in future high-density storage and neuromorphic computing systems.

关键词： artificial sulfur stability

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