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A synergetic strategy of NIR-Ⅱ squaraine dyes with ultrahigh photothermal conversion efficiency for photothermal therapy

2009年

作者： R.C. Hibbeler si conversion by tan kiang hwee.

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Science China Chemistry 2024年第2期67卷 612-621页

作者： Yigang Wang Guomin Xia Junhui Wang Mingda Wang Weihan Guo Manman tan Leilei si Yang Yang Hua Wang Hongming Wang Institute for Advanced Study and School of Chemistry and Chemical Engineering Nanchang UniversityNanchang330031China State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China The Second Affiliated Hospital of Nanchang University Nanchang330031China

Recent research on photothermal therapy(PTT) has sparked significant interest in the development of new organic photothermal agents(PTAs),ranging from single-molecule to aggregated ***,controlling aggregation pathways for PTAs with ultrahigh photothermal conversion efficiency(PCE) remains a major ***,a two-pronged approach utilizing “Haggregation” and “intramolecular motion” was employed to enhance the PCE of an acceptor-substituted squaraine dye(NSQs).The C2vmolecular symmetry of the NSQs,which possess a ground state dipole moment(μg),promotes H-dimeric aggregates through dipole-dipole *** triphenylethylene or diphenylamine groups were added to this H-dimeric *** was done to enhance intramolecular motions for heat generation and also to extend conjugation,which redshifted the optical absorption and balanced the blue-shift induced by *** this technique,an organic PTA with NIR-II absorption was developed,and its nanoparticle achieved a remarkable PCE of 86.3% under 1,064 nm laser *** transient absorption spectroscopy and quantum mechanical calculations demonstrated the accelerated internal conversion process in NIR-II PTAs for rapid heat *** NSQs nanoparticles exhibit superior photothermal therapeutic properties for in vivo photoacoustic imaging-guided PTT,demonstrating the potential of bottom-up design to enable synergistic engineering strategies towards efficient phototheranostic agents.

关键词： squaraine dyes second near-infrared window H-aggregation intramolecular motion photothermal therapy

In situ photoelectric biosensing based on ultranarrowband near-infrared plasmonic hot electron photodetection

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底栖扰动对城市河流沉积物CO_(2)和CH_(4)释放的影响

Advanced Photonics 2024年第2期6卷 81-89页

作者： Xianghong Nan Wenduo Lai Jie Peng Haiquan Wang Bojun Chen Huifan He Zekang Mo Zikun Xia Ning tan Zhong Liu Long Wen Dan Gao Qin Chen Jinan University College of Physics & Optoelectronic Engineering Institute of Nanophotonics Guangdong Provincial Key Laboratory of Nanophotonic Manipulation Tsinghua University Shenzhen International Graduate School State Key Laboratory of Chemical Oncogenomics Jinan University College of Life Science and Technology

Narrowband photodetection is an important measurement technique for material analysis and sensing, for example, nondispersive infrared sensing technique. Both photoactive material engineering and nanophotonic filtering schemes have been explored to realize wavelength-selective photodetection,while most devices have a responsive bandwidth larger than 2% of the operating wavelength, limiting sensing performance. Near-infrared photodetection with a bandwidth of less than 0.2% of the operating wavelength was demonstrated experimentally in Au/si Schottky nanojunctions. A minimum linewidth of photoelectric response down to 2.6 nm was obtained at a wavelength of 1550 nm by carefully tailing the absorptive and radiative loss in the nanostructures. Multiple functions were achieved on chip with the corrugated Au film, including narrowband resonance, light harvesting for sensing and photodetection, and electrodes for hot electron emission. Benefiting from such a unity integration with in situ photoelectric conversion of the optical sensing signal and the ultranarrowband resonance, self-contained on-chip biosensing via simple intensity interrogation was demonstrated with a limit of detection down to 0.0047%in concentration for glucose solution and 150 ng∕m L for rabbit IgG. Promising potential of this technique is expected for the applications in on-site sensing, spectroscopy, spectral imaging, etc.

关键词： Photodetectors Plasmonics Biosensing Optical gratings Gold Absorption spectrum Acoustooptic tunable filters Absorption Sensors In situ remote sensing

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中国环境科学 2024年第4期44卷 1885-1893页

作者：史思捷黎鸿莉姚婧梅韩乐谭秋君刘亚丽韦冰于雪松王程成重庆大学三峡库区生态环境教育部重点实验室重庆400045 重庆市规划设计研究院重庆401147

以具有不同扰动功能的黄色羽摇蚊幼虫(Chironomus flaviplumus)､苏氏尾鳃蚓(Branchiura sowerbyi)和椭圆萝卜螺(Radix swinhoei)为对象,通过微宇宙实验探究不同底栖动物扰动效应下的沉积物界面理化因子演变特性以及对温室气体CO_(2)和CH... 详细信息

以具有不同扰动功能的黄色羽摇蚊幼虫(Chironomus flaviplumus)､苏氏尾鳃蚓(Branchiura sowerbyi)和椭圆萝卜螺(Radix swinhoei)为对象,通过微宇宙实验探究不同底栖动物扰动效应下的沉积物界面理化因子演变特性以及对温室气体CO_(2)和CH_(4)释放的影响规律.结果表明,不同扰动类型的底栖动物对沉积物-水界面的溶氧(DO)特征带来差异化改变,并影响了有机质的好氧/厌氧分解和碳素转化,进而改变了CO_(2)和CH_(4)的产生及释放量:1)3种底栖动物对CO_(2)和CH_(4)释放的影响存在差异:苏氏尾鳃蚓对两种温室气体的释放呈现最强的促进作用(为对照组的1.59和1.64倍),椭圆萝卜螺对两种温室气体释放的影响不显著,而摇蚊幼虫一定程度上抑制了CH_(4)释放.2)尾鳃蚓扰动下更多的碳素被消耗(表层沉积物和上覆水的TC含量减少)并生成CO_(2)和CH_(4)从系统逸出,其最低的DO渗透深度也为有机物厌氧分解产生CH_(4)创造了更有利的条件;萝卜螺仅在沉积物表面活动,对DO渗透深度以及系统TC和TOC改变较小,进而对温室气体释放的影响也最弱;摇蚊幼虫对CH_(4)释放的抑制作用可能是由于其扰动增大了DO渗透深度,抑制了有机物厌氧分解.

关键词：底栖动物扰动功能群河流沉积物温室气体影响

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固化改良对底泥中Cd迁移转化的影响研究

环境科技 2024年第1期37卷 7-12页

作者：胡偲倢谭艳忠邱进生傅利中国电建集团中南勘测设计研究院有限公司湖南长沙410014

重金属污染底泥是疏浚底泥中较难处理的一种底泥,不仅需要改善其理化性质,还需要考虑重金属在底泥中的迁移转化。在石马河底泥中加入外源Cd2+并养护,同时加入固化材料和改良材料组合配方,研究在改善底泥理化性质的同时,固化材料和改良... 详细信息

重金属污染底泥是疏浚底泥中较难处理的一种底泥,不仅需要改善其理化性质,还需要考虑重金属在底泥中的迁移转化。在石马河底泥中加入外源Cd2+并养护,同时加入固化材料和改良材料组合配方,研究在改善底泥理化性质的同时,固化材料和改良材料对Cd在底泥中迁移转化的影响。结果表明,底泥中加入外源Cd2+后,养护龄期达到7 d时,底泥中Cd的形态基本稳定;加入以水泥为主的固化材料时,有助于底泥中Cd的形态从不稳定态向稳定态转化,且水泥的添加量越高,底泥浸出液中Cd的含量越低,通过对比分析得出,石马河底泥的固化配方宜为“40 kg/m^(3)水泥+5 kg/m^(3)石灰+5 kg/m^(3)石膏”;加入腐殖酸和稻草粉也有助于底泥中的Cd从不稳定态向稳定态转化,且稻草粉添加量宜为200 g/kg,腐殖酸添加量宜为5~10 g/kg。本研究成果可以为重金属污染底泥的资源化利用提供关键参数和科学依据。

关键词：固化材料 Cd 污染底泥迁移转化浸出液

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携能通信技术的无线中继网络资源分配算法

网络空间安全 2024年第1期15卷 142-146页

作者：邓惠丹谭江燕斯琴高娃张智海南职业技术学院中国移动通信集团广西有限公司

[目的/意义]解决无线中继网络覆盖范围和信号能量有限的问题。[方法/过程]设置源节点、中继节点和目的节点为主的中继传输模型，在给定时间T内由中继节点、源端节点，分别进行无线中继信号能量收集、信息传输，联合（定时开关TS）机制... 详细信息

[目的/意义]解决无线中继网络覆盖范围和信号能量有限的问题。[方法/过程]设置源节点、中继节点和目的节点为主的中继传输模型，在给定时间T内由中继节点、源端节点，分别进行无线中继信号能量收集、信息传输，联合（定时开关TS）机制的节点功率控制、时隙转换因子优化等因素，制定网络源端能量使用效率、能量吞吐量控制的优化策略。[结果/结论]引入非线性规划遗传算法（Karush Kuhn Tucker,KKT）对非凸目标函数进行求解，在仿真实验中验证算法的可行性和优越性。

关键词：携能通信技术无线中继网络资源分配算法网络安全

Taming heat with tiny pressure

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The Innovation 2024年第2期5卷 70-78页

作者： Kun Zhang Zhe Zhang Hailong Pan Haoyu Wang Xueting Zhao Ji Qi Zhao Zhang Ruiqi Song Chenyang Yu Biaohong Huang Xujing Li Huaican Chen Wen Yin Changlong tan Weijin Hu Michael Wüubbenhorst Jiangshui Luo Dehong Yu Zhidong Zhang Bing Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Laboratory for Soft Matter and Biophysics Department of Physics and AstronomyKU Leuven3001 LeuvenBelgium Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China College of Materials Science and Engineering Sichuan UniversityChengdu 610064China School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150080China Australian Nuclear Science and Technology Organisation Lucas HeightsNSW 2234Australia

Heat is almost *** electricity,which can be easily manipulated,the current ability to control heat is still highly limited owing to spontaneous thermal dissipation imposed by the second law of *** illumination and pressure have been used to switch endothermic/exothermic responses of materials via phase transitions;however,these strategies are less cost-effective and ***,we spectroscopically demonstrate the glassy crystal state of 2-amino-2-methyl-1,3-propanediol(AMP)to realize an affordable,easily manageable approach for thermal energy *** supercooled state of AMP is so sensitive to pressure that even several megapascals can induce crystallization to the ordered crystal,resulting in a substantial temperature increase of 48 K within 20 ***,we demonstrate a proof-of-concept device capable of programable heating with an extremely high work-to-heat conversion effi-ciency of*** delicate and efficient tuning of heat may remarkably facilitate rational utilization of waste heat.

关键词： illumination thermal rational

Laser direct writing derived robust carbon nitride films with efficient photon-to-electron conversion for multifunctional photoelectrical applications

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Carbon Energy 2022年第6期4卷 1228-1241页

作者： Haotian tan Wenping si Wei Peng Yuqing Wang Daolan Liu Liqun Wang Chongyun Jiang Lu Di Ji Liang Feng Hou Institute of Advanced Ceramics Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationSchool of Materials Science and EngineeringTianjin UniversityTianjinChina Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia Applied Physics Department College of Physics and Materials ScienceTianjin Normal UniversityTianjinChina Institute of Photoelectronic Thin Film Devices and Techology College of Electronic Information and Optical EngineeringNankai UniversityTianjinChina School of Materials Science and Engineering Nankai UniversityTianjinChina

Carbon nitride,an emerging polymeric semiconductor,has attracted attention in research ranging from photocatalysis to photodetection due to its favorable visible light response and high physicochemical *** its practical device application,the fabrication of high-quality carbon nitride films on substrates is ***,conventional methodologies to achieve high polymerization of carbon nitride are often accompanied by its decomposition,significantly compromising the film ***,we report an ultrafast fabrication of carbon nitride film by laser direct writing(LDW).The instantaneous high temperature and pressure during LDW can efficiently boost the polymerization of carbon nitride and suppress its decomposition,resulting in high-quality carbon nitride film with excellent mechanical stability with the *** to the efficient photon-to-electron conversion,it exhibits an outstanding photoelectrochemical water splitting and optoelectronic detection capability,even under strong acid/alkaline *** study thus offers a facile and efficient LDW strategy for the rapid fabrication of carbon nitride film photoelectrodes,demonstrating its great feasibility in multifunctional photoelectrical applications,including but not limited to photoelectrochemical water splitting and optoelectronic detection.

关键词： carbon nitride laser direct writing photodetectors photoelectrochemical water splitting

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高压电缆接地电流在线监测系统的设计与研究

电工技术 2024年第2期 26-28,93页

作者：鲁朝峰沈佳华张嘉麟李江婷谭浩王奇李锶湖南理工学院机械工程学院湖南岳阳414006 杭州国洲电力科技有限公司浙江杭州310015

高压电缆外护套绝缘状态差、接地不良、接地方式不正确等因素引起接地电流异常,造成电缆局部发热、绝缘老化加速、绝缘击穿等故障,实施接地电流在线监测可在故障前及时发现电缆缺陷。为此,设计了一种基于AT32F435的电缆接地电流在线监... 详细信息

高压电缆外护套绝缘状态差、接地不良、接地方式不正确等因素引起接地电流异常,造成电缆局部发热、绝缘老化加速、绝缘击穿等故障,实施接地电流在线监测可在故障前及时发现电缆缺陷。为此,设计了一种基于AT32F435的电缆接地电流在线监测系统,该系统由电流信号采集模块采集接地电流信号,通过ATT7053B芯片进行模数转换,再由AT32F435芯片读取ATT7053B芯片内信号数据,并对信号数据进行处理后,利用以太网模块传到上位机,对信号数据进行显示及存储处理。该系统对电缆运行状态进行实时监测,准确发现电缆故障,对提高输电可靠性具有重要意义。

关键词：电力电缆接地电流故障在线监测 AT32F435

探讨面向能源电化学的新一代表征方法——从工况表征到人工智能

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中国科学：化学 2024年第3期54卷 338-352页

作者：乔羽胡仁谷宇汤富杰罗思恒张海棠田景华程俊田中群厦门大学固体表面物理化学国家重点实验室厦门361005 福建省能源材料科学与技术创新(嘉庚)实验室厦门361005

电化学科学与技术在新能源等领域扮演着日益重要的角色且面临巨大挑战,传统的原位和非原位表征方法难以满足具有大流量、高密度且动态变化的传荷、传能和传质的大型电化学能源器件的需求,无法全面获取有关各类界面结构与过程的能(量)–... 详细信息

电化学科学与技术在新能源等领域扮演着日益重要的角色且面临巨大挑战,传统的原位和非原位表征方法难以满足具有大流量、高密度且动态变化的传荷、传能和传质的大型电化学能源器件的需求,无法全面获取有关各类界面结构与过程的能(量)–时(间)–空(间)相关信息.本文在讨论谱学电化学发展脉络和分析非原位、原位和工况三类表征的本质性区别的基础上,展望面向新型电化学能源器件/系统的新一代工况表征实验和理论方法,建议着重发展可实时检测关键反应中间物/产物的谱学和传感技术,全面跟踪各个界面和体相的动态变化特别是它们之间的耦合与串扰,进而解析整个系统内相互关联的复杂机制;强调能源器件工况表征技术进一步与兴起的人工智能技术优势互补,将实现各类工况表征和检测模块与器件的工况调控部分的系统结合.通过人工智能辅助,快速获取并分析工况表征数据后及时反馈至器件/系统的控制中心后做出调控工作参数决定,实现器件在工况下的检测–解析–控制的全闭环模式.基于人工智能驱动,将原本数个分立且耗时低效的操作模块有机地合为一体,不仅可优化系统和获取大量数据,而且有望指导生成全新的电化学能源器件,发展为未来研究范式,为发展能源电化学、化学测量学和界面科学乃至建立系统电化学等新方向提供新途径.

关键词：能源电化学谱学电化学工况检测人工智能系统电化学

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