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Operando optical fiber monitoring of nanoscale and fast temperature changes during photo-electrocatalytic reactions

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Light(Science & Applications) 2022年第9期11卷 2086-2097页

作者： ZHI LI yongguang xiao FU LIU XIANGYU YAN DAOTONG YOU KAIWEI LI LIXI ZENG MINGSHAN ZHU GAOZHI xiao JACQUES ALBERT TUAN GUO Guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou 511443China Guangdong Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhouGuangdong 511443China Department of Electronics Carleton UniversityOttawa K1S 5B6Canada Advanced Electronics and Photonics Research Center National Research Council of CanadaOttawa K1A 0R6Canada Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China

In situ and continuous monitoring of thermal effects is essential for understanding photo-induced catalytic processes at catalyst's ***,existing techniques are largely unable to capture the rapidly changing temperatures occurring in sub-μm layers at liquid-solid interfaces exposed to *** address this,a sensing system based on a gold-coated conventional single-mode optical fiber with a tilted fiber Bragg grating inscribed in the fiber core is proposed and *** spectral transmission from these devices is made up of a dense comb of narrowband resonances that can differentiate between localized temperatures rapid changes at the catalyst's surface and those of the *** using the gold coating of the fiber as an electrode in an electrochemical reactor and exposing it to light,thermal effects in photo-induced catalysis at the interface can be decoded with a temperature resolution of 0.1℃and a temporal resolution of 0.1 sec,without perturbing the catalytic operation that is measured *** a demonstration,stable and reproducible correlations between the light-to-heat conversion and catalytic activities over time were measured for two different catalysis processes(linear and nonlinear).These kinds of sensing applications are ideally suited to the fundamental qualities of optical fiber sensors,such as their compact size,flexible shape,and remote measurement capability,thereby opening the way for various thermal monitoring in hard-to-reach spaces and rapid catalytic reaction processes.

关键词： catalysis catalyst thereby

Superfine multiresonant fiber grating sensors assisted with silica capillaries

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Photonics Research 2024年第11期12卷 2488-2494页

作者： KAIWEI LI yongguang xiao FU LIU ZHIYONG YANG XIANGYU YAN ZHAOHUI LI TUAN GUO GAOZHI GEORGE xiao JACQUES ALBERT Key Laboratory of Bionic Engineering (Ministry of Education) Jilin University Institute of Photonics Technology Jinan University School of Electrical and Information Technology Sun Yat-sen University Department of Electronics Carleton University National Research Council Canada

We propose and demonstrate a superfine multiresonant fiber grating sensor characterized by superior spectral resolution and enhanced sensing capabilities. This sensor can be easily constructed by inserting a tilted fiber Bragg grating(TFBG) probe into a silica capillary filled with a refractive index(RI) matching oil. As the fiber cladding,the RI-matching oil, and the capillary all have the same RI, the cladding modes excited by the TFBG can extend into the RI-matching oil and capillary, facilitating surface sensing outside the capillary. Our study shows that the number of cladding modes increases, and the resonance spectrum becomes denser as the outer diameter of the capillary gets larger. As a result, the detection accuracy of RI based on mode cutoff wavelength identification can be improved. Particularly, with a capillary diameter of 1 mm, the heightened spectral density enhances refractometric accuracy by nearly an order of magnitude compared to the intrinsic TFBG. The superfine multiresonant fiber grating sensor proposed here is flexible in configuration and easy to fabricate, providing a new strategy for developing new fiber sensing devices. ? 2024 Chinese Laser Press

关键词： Effective refractive index Fiber Bragg gratings Fiber optic sensors Microstructured fibers Multicore fibers Multimode fibers

Promoting spintronic terahertz radiation via Tamm plasmon coupling

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Photonics Research 2023年第6期11卷 1057-1066页

作者： YUNQING JIANG HONGQING LI xiaoQIANG ZHANG FAN ZHANG YONG XU yongguang xiao FENGGUANG LIU ANTING WANG QIWEN ZHAN WEISHENG ZHAO School of Integrated Circuit Science and Engineering Hefei Innovation Research InsitituteBeihang UniversityBeijing 100191China Anhui High Reliability Chips Engineering Laboratory Hefei 230013China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Department of Optics and Optical Engineering University of Science and Technology of ChinaHefei 230026China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Spectral fingerprint and terahertz(THz)field-induced carrier dynamics demands the exploration of broadband and intense THz signal *** THz emitters(STEs),with high stability,a low cost,and an ultrabroad bandwidth,have been a hot topic in the field of THz *** of the main barriers to their practical application is lack of an STE with strong radiation ***,through the combination of optical physics and ultrafast photonics,the Tamm plasmon coupling(TPC)facilitating THz radiation is realized between spin THz thin films and photonic crystal *** results show that the spectral absorptance can be increased from 36.8%to 94.3%for spin THz thin films with *** coupling with narrowband resonance not only improves the optical-to-spin conversion efficiency,but also guarantees THz transmission with a negligible loss(~4%)for the photonic crystal *** to the simulation,we prepared this structure successfully and experimentally realized a 264%THz radiation ***,the spin THz thin films with TPC exhibited invariant absorptivity under different polarization modes of the pump beam and weakening confinement on an obliquely incident pump *** approach is easy to implement and offers possibilities to overcome compatibility issues between the optical structure design and low energy consumption for ultrafast THz optospintronics and other similar devices.

关键词： pump polarization coupling

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我国农村居民金融素养现状及提升问题研究

金融理论与教学 2021年第6期 35-38页

作者：肖勇光交通银行湖南省分行湖南长沙410128

随着越来越多的居民加入金融市场从事投资活动,我国居民金融素养相对过低的问题逐渐暴露出来。我国又是一个农村居民占绝大多数的国家,低水平的金融素养让广大农村居民们处于较高的金融风险之下,大幅度降低了我国农村居民的金融福祉。... 详细信息

随着越来越多的居民加入金融市场从事投资活动,我国居民金融素养相对过低的问题逐渐暴露出来。我国又是一个农村居民占绝大多数的国家,低水平的金融素养让广大农村居民们处于较高的金融风险之下,大幅度降低了我国农村居民的金融福祉。这里从金融知识的普及度、金融参与态度、金融参与的风险意识等三个方面分析我国农村居民素养的现状,以年龄、性别、金融受教育程度、家庭收入、地域因素这五个指标分析了我国农村居民金融素养的影响因素。研究表明:家庭收入、金融受教育程度、金融教育对金融素养的提升具有较大的积极作用。最后提出提升我国农村居民金融素养的对策及建议。

关键词：农村居民金融素养素养提升

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肺叶切除肺动脉重建术治疗中心型肺癌

武汉大学学报（医学版） 2008年第1期29卷 119-121页

作者：肖永光毛志福黄杰吴伟谢颂平武汉大学人民医院胸外科湖北武汉430060

目的:回顾分析肺叶切除肺动脉重建术治疗中心型肺癌的效果。方法:采取肺叶切除肺动脉重建术治疗中心型肺癌,其肺动脉均受到肿瘤侵犯。肺部肿瘤部位左上叶45例,右上叶29例。处理方法为:浸润血管壁局部切除+直接缝合术27例;浸润血管壁局... 详细信息

目的:回顾分析肺叶切除肺动脉重建术治疗中心型肺癌的效果。方法:采取肺叶切除肺动脉重建术治疗中心型肺癌,其肺动脉均受到肿瘤侵犯。肺部肿瘤部位左上叶45例,右上叶29例。处理方法为:浸润血管壁局部切除+直接缝合术27例;浸润血管壁局部切除+缺损血管壁补片术21例;浸润血管壁袖状切除+端端缝合术11例;浸润血管袖状切除+再造导管间置术15例。结果:本组74例患者中,无手术死亡,术后发生并发症15例,肺炎13例次,心律失常1例次,心功能不全1例次,胸腔积液5例,经保守治疗均痊愈。结论:肺血管成形肺叶切除是治疗中心型肺癌安全可靠的方法之一。

关键词：肺血管成形肺癌手术治疗

Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

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Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao Peng Yuefeng Song Ihar Razanau Juanxiu xiao Wei xiao Di Hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Activation energy

我国金融扶贫内卷化困境及破解路径研究--以阜平县为例

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金融理论与教学 2020年第5期 35-38页

作者：蔡洋萍肖勇光湖南农业大学经济学院湖南长沙410128 交通银行湖南省分行公司业务部湖南长沙410100

金融资源在实现我国"精准扶贫"战略中发挥着巨大的作用,尤其在一些贫困地区起到了非常强的金融扶贫示范效应。研究以阜平县为例,发现随着我国金融扶贫工作的不断推进,我国贫困地区的金融扶贫出现"内卷化"困境。即金融扶贫资源不断投入... 详细信息

金融资源在实现我国"精准扶贫"战略中发挥着巨大的作用,尤其在一些贫困地区起到了非常强的金融扶贫示范效应。研究以阜平县为例,发现随着我国金融扶贫工作的不断推进,我国贫困地区的金融扶贫出现"内卷化"困境。即金融扶贫资源不断投入的情况下,单位金融资源所产生的边际效应降低,金融扶贫内部系统更加复杂,并产生严重路径依赖,难以出现"救济式"扶贫向"开发式"扶贫转变。主要表现为金融扶贫贷款边际效应递减,金融扶贫可持续性减弱,贫困地区内部分化加剧等现象。建议从建立内外联动的金融扶贫体系,提升贫困农户的金融素养,构建金融扶贫精细化瞄准机制等几方面破解金融扶贫"内卷化"困境。

关键词：金融扶贫内卷化破解路径

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肺癌早期诊断的策略和意义

医学新知 2007年第2期17卷 99-101页

作者：程邦昌黄杰肖永光武汉大学人民医院胸心外科武汉430060

在我国，随着人均寿命延长、城市化加快、禁烟运动不力、职业暴露、环境污染、遗传易感性等因素的影响，肺癌的发病率呈上升趋势，目前已占全部恶性肿瘤的首位。现今每4例死亡者中有1例为肺癌。根据卫生部全国肿瘤防治研究办公室统计，... 详细信息

在我国，随着人均寿命延长、城市化加快、禁烟运动不力、职业暴露、环境污染、遗传易感性等因素的影响，肺癌的发病率呈上升趋势，目前已占全部恶性肿瘤的首位。现今每4例死亡者中有1例为肺癌。根据卫生部全国肿瘤防治研究办公室统计，我国男性肺癌死亡数1991年为134748，2000年为251839，2005年为3322286；女性肺癌死亡数1991年为56468，2000年为119648，2005年为165622。而近30年来，欧美诸国因大力治理环境和宣传戒烟，至20世纪末已有迹象表明：常见的肿瘤，包括肺癌，无论是其发病率和死亡率均呈不同程度的下降趋势；男性肺癌发病率由1984年的102／10万下降到1999年81／10万；病死率由92／10万下降到80／10万，说明肺癌是可以预防和控制的。美国三个权威机构（ACS、NCI和CDC）预测，到2015年美国癌症发生率将下降25％，死亡率下降40％。我国现有烟民3亿多，若不加强控烟预防，预测到2020年，每3例死亡者中1例为肺癌。除加强预防外，早期诊断可及时发现早期肺癌病人，及时给予治疗，以获得好的治疗效果。

关键词：肺癌早期诊断癌发病率环境污染恶性肿瘤治疗效果遗传易感性癌症发生率寿命延长

DAPT对大鼠自体移植静脉桥狭窄的抑制作用

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医学研究杂志 2013年第11期42卷 88-90页

作者：肖永光毛志福龚丹武汉大学人民医院 430060

目的观察DAPT对大鼠自体移植静脉桥狭窄的抑制作用。方法成年Wistar大鼠随机分为实验组、对照组和安慰剂组,每组12只。所有大鼠分离并切取0.5cm长颈外静脉,移植到自体同侧颈总动脉中。分别于术后第1天、第4天和第7天取各组动物各4只,完... 详细信息

目的观察DAPT对大鼠自体移植静脉桥狭窄的抑制作用。方法成年Wistar大鼠随机分为实验组、对照组和安慰剂组,每组12只。所有大鼠分离并切取0.5cm长颈外静脉,移植到自体同侧颈总动脉中。分别于术后第1天、第4天和第7天取各组动物各4只,完整取下移植静脉桥,常规石蜡包埋,切片行HE及PCNA和TUNEL免疫组化染色,计算静脉桥中膜增生的厚度和平滑肌细胞PCNA和TUNEL阳性指数,并用Western blot检测SM22和SM MHC变化。结果移植后第7天实验组静脉桥中膜厚度和PCNA阳性指数比对照组和安慰剂组明显较小(P<0.05),但实验组凋亡程度明显高于安慰剂组。Western blot显示静脉桥移植后SM22和SM MHC表达明显降低,syndecan-1表达降低,但DAPT能够促使其表达回复。结论 DAPT能够缓解静脉桥狭窄,并对移植静脉内平滑肌细胞增生有抑制作用。

关键词：静脉桥 DAPT 狭窄