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Intermolecular hydrogen-bonding as a robust tool toward significantly improving the photothermal conversion efficiency of a NIR-II squaraine dye

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Chinese Chemical Letters 2024年第4期35卷 310-315页

作者： Songtao Cai Liuying Wu Yuan Li soham samanta Jinying Wang Bing Liu Feihu Wu Kaitao Lai Yingchao Liu Junle Qu Zhigang Yang Center for Biomedical Photonics&Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

The photothermal therapy(PTT) has come across as a promising noninvasive therapeutic strategy for tumor treatment. However, low photothermal conversion efficiency(PCE) and hydrophobicity may impede the therapeutic efficacy of organic photothermal agents and an efficient PTT-agent must overcome these two major challenges. In this work, we developed a new strategy to promote higher PCE wherein the intermolecular hydrogen-bonding interaction between the single dye molecule and water facilitated the transformation of the absorbed energy into the heat. A hydrophilic squaraine dye(SCy1) with the second near-infrared region(NIR-II) absorption and extremely low emission were designed to exhibit much higher PCE than that of the analogues of pentamethine-dyes(PCy1, PCy2). The presence of the ‘–O-' at middle of squaric cycle enabled the intermolecular H-bonding formation between the SCy1 and water to promote the energy dissipation channel. Moreover, the introduction of long-chain phenylsulfonate groups helped in to improve the water solubility apart from serving as an additional means of further enhancing PCE through fluorescence quenching. Therefore, SCy1 with a squaraine backbone and long-chain sulfonate moieties revealed outstanding photothermal stability and anti-aggregation activity apart from showing exceptionally high PCE(74%) in water. SCy1 demonstrated excellent therapeutic efficacy when applied in the PTT treatment of tumor-bearing mice under a laser irradiation of 915 nm.

关键词： Squaraine-based cyanine Hydrogen bonds High PCE Anti-aggregation Photothermal therapy

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Effect of Spray Rails on Takeoff Performance of Amphibian Aircraft

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World Journal of Engineering and Technology 2024年第1期12卷 117-140页

作者： soham S. Bahulekar Alberto W. Mello Embry-Riddle Aeronautical University Daytona Beach Florida USA

Amphibian aircraft have seen a rise in popularity in the recreational and utility sectors due to their ability to take off and land on both land and water, thus serving a myriad of purposes, such as aerobatics, surveillance, and firefighting. Such seaplanes must be aerodynamically and hydrodynamically efficient, particularly during the takeoff phase. Naval architects have long employed innovative techniques to optimize the performance of marine vessels, including incorporating spray rails on hulls. This research paper is dedicated to a comprehensive investigation into the potential utilization of spray rails to enhance the takeoff performance of amphibian aircraft. Several spray rail configurations obtained from naval research were simulated on a bare Seamax M22 amphibian hull to observe an approximate 10% - 25% decrease in water resistance at high speeds alongside a 3% reduction in the takeoff time. This study serves as a motivation to improve the design of the reference airplane hull and a platform for detailed investigations in the future to improve modern amphibian design.

关键词： Seaplane Spray Rails Hull Optimization Take-Off Performance

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Microwave-accelerated direct regeneration of LiCoO_(2)cathodes for Li-ion batteries

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Science China Chemistry 2024年第7期67卷 2181-2189页

作者： Xueshan Hu Yun-Chao Yin Chao Li Lihui Zhou Lin Yang Yitian Feng Daxian Zuo Chenhui Ning Das soham Sheng Dai Longbin Qiu Lin Zeng Haw Jiunn Woo Jiayu Wan Future Battery Research Center Global Institute of Future TechnologyShanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Centre for Ionics University of Malaya Department of PhysicsFaculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Natural and Applied Sciences Duke Kunshan UniversityKunshan 215316China

Recycling spent lithium-ion batteries is integral to today's low-carbon environmental protection efforts.The concept of direct regeneration,acknowledged for its environmental sustainability,economic viability,and consistent performance of recycled materials,is gaining prominence.This study presents an efficient and nondestructive approach by utilizing an ultrafast microwave technology to directly regenerate spent lithium cobaltate(LCO)cathode materials.In contrast to conventional furnacebased processes,this method significantly reduces the regeneration timeframe.By subjecting the spent LCO mixed with lithium sources to three microwave heating cycles(at approximately 1,350 K),LCO regeneration is achieved,yielding a specific capacity of 140.8 mAh g^(-1)(0.2 C)with a robust cycle stability.With further environmental and economic benefits,the ultrafast microwave technology holds scientific promise for directly regenerating cathode materials,while establishing competitiveness for industrial applications.

关键词： battery recycling spent lithium cobaltate microwave directly regeneration cathode materials

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An Anisotropic Hyperelastic Inflated Toroidal Membrane in Lateral Contact with Two Flat Rigid Plates

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Acta Mechanica Solida Sinica 2022年第6期35卷 1068-1081页

作者： Satyajit Sahu soham Roychowdhury School of Mechanical Sciences Indian Institute of Technology BhubaneswarBhubaneswarIndia

The present paper studies the contact problem of an inflated toroidal nonlinear anisotropic hyperelastic membrane laterally pressed between two flat rigid plates.The material is assumed to be homogeneous,and an anisotropic term is included in the incompressible Mooney–Rivlin hyperelastic model.Initially,two annular-shaped flat membranes,bonded at both equators,are considered in an undeformed state,which results in a toroidal geometry upon uniform internal pressurization.The contact problem of the inflated torus laterally pressed between two flat parallel plates is solved.Two different contact conditions,namely frictionless contact and no-slip contact,are considered within the contact region.The enclosed amount of gas within the inflated membrane is considered to be constant during the solution of the contact problem,which is solved in a quasi-static manner.In the case of no-slip contact,the stretch locking has been observed,and the frictionless contact causes the free flow of material points.The membrane’s stiffness increases with increasing anisotropic,material,and geometric parameters depicted in the force versus displacement curve under contact conditions.

关键词： Inflated toroidal membrane Hyperelasticity Anisotropic stretching Frictionless contact No-slip contact

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一种用于线粒体受激辐射损耗超分辨成像的新型探针

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物理学报 2020年第16期69卷 304-312页

作者：张佳 samanta soham 王佳林王璐玮杨志刚严伟屈军乐深圳大学物理与光电工程学院光电子器件与系统教育部/广东省重点实验室深圳518060

受激辐射损耗(stimulated emission depletion,STED)显微技术通过巧妙的光学设计,利用纯光学的方法突破了光学衍射极限,空间分辨率达到纳米量级,并保留了荧光显微的许多优点.然而,高的损耗光强度限制了STED显微技术的广泛应用,尤其在活... 详细信息

受激辐射损耗(stimulated emission depletion,STED)显微技术通过巧妙的光学设计,利用纯光学的方法突破了光学衍射极限,空间分辨率达到纳米量级,并保留了荧光显微的许多优点.然而,高的损耗光强度限制了STED显微技术的广泛应用,尤其在活细胞成像方面.本文找到了一种新型的具有良好线粒体靶向性的STED探针,具有较强的抗光漂白特性和较低的饱和擦除光强度3.5 mW(1.1 MW·cm–2),利用该探针最高可获得62 nm的空间分辨率,为活细胞线粒体STED超分辨成像提供了新的手段.

关键词：受激辐射损耗显微超分辨成像荧光探针线粒体活细胞成像

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