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2D materials for conducting holes from grain boundaries in perovskite solar cells

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Light(Science & Applications) 2021年第4期10卷 695-706页

作者： Peng You Guanqi Tang Jiupeng Cao Dong Shen tsz-wai ng Zafer Hawash Naixiang Wang Chun-Ki Liu Wei Lu Qidong Tai Yabing Qi Chun-Sing Lee Feng Yan Departm ent of Applied Physics The Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina College of New Materials and New Energies Shenzhen Technology University518118 ShenzhenChina Center of Super-Diamond and Advanced Films(COSDAF) Department of ChemistryCity University of Hong KongHong KongChina Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)1919-1 TanchaOnna-sonOkinawa 904-0495Japan University Research Facility in Materials Characterization and Device Fabrication The Hong Kong Polytechnic UniversityHung HornKowloonHong KongChina

Grain boundaries in organic-inorganic halide perovskite solar cells(PSCs)have been found to be detrimental to the photovoltaic performance of ***,we develop a unique approach to overcome this problem by modifying the edges of perovskite grain boundaries with flakes of high-mobility two-dimensional(2D)materials via a convenient solution process.A synergistic effect between the 2D flakes and perovskite grain boundaries is observed for the first time,which can significantly enhance the performance of *** find that the 2D flakes can conduct holes from the grain boundaries to the hole transport layers in PSCs,thereby making hole channels in the grain boundaries of the ***,2D flakes with high carrier mobilities and short distances to grain boundaries can induce a more pronounced performance enhancement of the *** work presents a cost-effective strategy for improving the performance of PSCs by using high-mobility 2D materials.

关键词： materials. process. perovskite

Photocatalytic Bacterial Disinfection in a Partition System

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Photocatalytic Bacterial Disinfection in a Partition System

Mitochondrial therapeutics and mitochondrial transfer for neurodegenerative diseases and aging

2012年环境污染与大众健康学术会议

作者： tsz wai ng Po Keung WOng Wing Kei HO School of Life Sciences The Chinese University of Hong Kong Shatin Hong Kong SAR China

ISBN: (纸本)9781618960108

Photocatalytic disinfection has been well-studied for water treatment. However, the post-separation of photocatalyst remains a major challenge for practical application. This study developed a novel method for photocatalytic disinfection, which used a "partition system" to retain the photocatalyst. Cadmium indium sulfate （CdIn 2 S 4 ） coupled with regenerated cellulose membrane gave the best performance. 4 log-reduction of a Gram-negative bacterium, Escherichia coli, and 5 log-reduction of a Gram-positive bacterium, Microbacterium Barkeri, （initial cell density 2×10 5 cells/mL） were achieved within 4 and 6 h, respectively. Scavenger study revealed that H 2 O 2 is the major reactive species for bacterial inactivation in the "partition system". The study provides an alternative cost-effective method for the application of photocatalysis in water disinfection.

关键词： Photocatalysis Bacterial disinfection Partition system

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Neural Regeneration Research 2025年第3期20卷 794-796页

作者： Neville ng Michelle Newbery Nicole Miles Lezanne Ooi Molecular Horizons and School of Chemistry and Molecular Bioscience University of WollongongWollongongNSWAustralia

Mitochondrial dysfunction and neurodegeneration:Progressive neurodegenerative diseases affect a significant proportion of the population;in a single year,there are as many as 276 million disabilities and 9 million dea... 详细信息

关键词： degenerative diseases Mitochondrial

Growth hormone-releasing hormone receptor signaling in experimental ocular inflammation and neuroprotection

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Neural Regeneration Research 2022年第12期17卷 2643-2648页

作者： Ling-Ping Cen tsz Kin ng wai Kit Chu Chi Pui Pang Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong ShantouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong Kong Special Administrative RegionChina

Both inflammation and anti-inflammation are involved in the protection of retinal *** of the hypothalamic growth hormone-releasing hormone receptor(GHRHR)have been shown to possess potent anti-inflammatory properties in experimental disease models of various organs,some with systemic *** effects are also found in ocular inflammatory and neurologic injury *** experimental models of mice and rats,both growth hormone-releasing hormone receptor agonists and antagonists may alleviate death of ocular neural cells under certain experimental *** review explores the properties of growth hormone-releasing hormone receptor agonists and antagonists that lead to its protection against inflammatory responses induced by extrinsic agents or neurologic injures in ocular animal models.

关键词： neuroprotection ocular inflammation optic nerve injury retinal ganglion cells uveitis

Robust interface and excellent as-built mechanical properties of Ti–6Al–4V fabricated through laser-aided additive manufacturing with powder and wire

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 154-168页

作者： Fei Weng Guijun Bi Youxiang Chew Shang Sui Chaolin Tan Zhenglin Du Jinlong Su Fern Lan ng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong Engineering&Technology Research Center for Superhard MaterialSchool of Materials Science and EngineeringShandong UniversityJinan 250061China Institute of Intelligent Manufacturing Guangdong Academy of SciencesGuangzhou 510095China Singapore Institute of Manufacturing Technology 5 Cleantech Loop636732Singapore

The feasibility of manufacturing Ti-6Al-4V samples through a combination of laser-aided additive manufacturing with powder(LAAM_(p))and wire(LAAM_(w))was explored.A process study was first conducted to successfully circumvent defects in Ti-6Al-4V deposits for LAAM_(p) and LAAM_(w),*** the optimized process parameters,robust interfaces were achieved between powder/wire deposits and the forged substrate,as well as between powder and wire *** characterization results revealed the epitaxial prior β grains in the deposited Ti-6Al-4V,wherein the powder deposit was dominated by a finerα′microstructure and the wire deposit was characterized by lamellar α *** mechanisms of microstructure formation and correlation with mechanical behavior were analyzed and *** mechanical properties of the interfacial samples can meet the requirements of the relevant Aerospace Material Specifications(AMS 6932)even without post heat *** fracture occurred within the interfacial area,further suggesting the robust *** findings of this study highlighted the feasibility of combining LAAM_(p) and LAAM_(w) in the direct manufacturing of Ti-6Al-4V parts in accordance with the required dimensional resolution and deposition rate,together with sound strength and ductility balance in the as-built condition.

关键词： laser-aided additive manufacturing powder deposition wire deposition interfacial characteristic mechanical behavior

Stem cell therapy for retinal ganglion cell degeneration

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Neural Regeneration Research 2018年第8期13卷 1352-1353页

作者： Ling-Ping Cen tsz Kin ng Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong Shantou Guangdong Province China Shantou University Medical College Shantou Guangdong China Department of Ophthalmology and Visual Sciences The Chinese University of Hong Kong Hong Kong Special Administrative Region China

The prospects of stem cell therapy for retinal ganglion cell （RGC） degeneration in human： RGC degeneration is a common pathologic cause of glaucoma and optic neuropathies, which are the leading cause of irreversible blindness and visual impairment in developed coun- tries, currently affecting more than 100 million people worldwide.

关键词：干细胞治疗退化房间膜世界范围 RGC 病理学神经病

Exacerbated VEGF up-regulation accompanies diabetes-aggravated hemorrhage in mice after experimental cerebral ischemia and delayed reperfusion

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Neural Regeneration Research 2022年第7期17卷 1566-1575页

作者： Angela Ka wai Lai tsz Chung ng Victor Ka Lok Hung Ka Cheung Tam Chi wai Cheung Sookja Kim Chung Amy Cheuk Yin Lo Department of Ophthalmology Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administration RegionChina Department of Anesthesiology Laboratory and Clinical Research Institute for PainThe University of Hong KongHong Kong Special Administration RegionChina Macao University of Science and Technology TaipaMacao Special Administration RegionChinaSchool of Biomedical SciencesThe State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong Special Administration RegionChina

Reperfusion therapy is the preferred treatment for ischemic stroke,but is hindered by its short treatment window,especially in patients with diabetes whose reperfusion after prolonged ischemia is often accompanied by exacerbated *** mechanisms underlying exacerbated hemorrhage are not fully *** study aimed to identify this mechanism by inducing prolonged 2-hour transient intraluminal middle cerebral artery occlusion in diabetic Ins2Akita/+mice to mimic patients with diabetes undergoing delayed mechanical *** results showed that at as early as 2 hours after reperfusion,Ins2Akita/+mice exhibited rapid development of neurological deficits,increased infarct and hemorrhagic transformation,together with exacerbated down-regulation of tight-junction protein ZO-1 and upregulation of blood-brain barrier-disrupting matrix metallopeptidase 2 and matrix metallopeptidase 9 when compared with normoglycemic Ins2+/+*** indicated that diabetes led to the rapid compromise of vessel integrity immediately after reperfusion,and consequently earlier death and further aggravation of hemorrhagic transformation 22 hours after *** observation was associated with earlier and stronger up-regulation of pro-angiogenic vascular endothelial growth factor(VEGF)and its downstream phospho-Erk1/2 at 2 hours after reperfusion,which was suggestive of premature angiogenesis induced by early VEGF up-regulation,resulting in rapid vessel disintegration in diabetic *** reticulum stress-related pro-apoptotic C/EBP homologous protein was overexpressed in challenged Ins2Akita/+mice,which suggests that the exacerbated VEGF up-regulation may be caused by overwhelming endoplasmic reticulum stress under diabetic *** conclusion,the results mimicked complications in patients with diabetes undergoing delayed mechanical thrombectomy,and diabetes-induced accelerated VEGF up-regulation is likely to underlie exacerbated hemorrhagic transformat

关键词： blood-brain barrier brain injury diabetes mellitus hemorrhagic transformation infarct ischemia/reperfusion injury middle cerebral artery occlusion mouse model stroke vascular endothelial growth factor

Effects of biochar on soil water retention curves of compacted clay during wetting and drying

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Biochar 2022年第1期4卷 1117-1130页

作者： James tsz Fung Wong Ka Lai Chow Xun Wen Chen Charles Wang wai ng Ming Hung Wong Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongSARChina Department of Geography Hong Kong Baptist UniversityKowloon TongHong KongSARChina Consortium on Health EnvironmentEducation and Research(CHEER)Department of Science and Environmental StudiesThe Education University of Hong KongTai PoHong KongSARChina Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China State Environmental Protection Key Laboratory of Integrated Surface Water Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Compacted clay possesses a low water permeability and has been widely used in geo-environmental facilities such as landfill cover *** studies revealed the potential applications of compacted biochar-amended clay(BAC)as an alternative landfill cover ***,the effects of biochar on the soil water retention curves(SWRCs)of clay at low suction are not *** study can help fill this knowledge gap by measuring the wetting and drying SWRCs of clay and BAC(20%biochar).Soils were compacted in instrumented soil columns and subjected to a wetting and drying cycle,and soil water content and suction were measured along with the soil *** was saturated faster when compared with *** drying,the soil water content of clay at 65 mm depth dropped to almost zero,while about 5%of water was retained in *** showed that biochar increased the soil water retention capacity of compacted clay upon *** showed that biochar-clay composite possesses a higher soil water retention capacity at a low soil suction range(ng compacted biochar-clay composite as a hydraulic barrier to minimize desiccation-induced cracks and potentially promote its serviceability,especially in arid and semi-arid *** composite is also a carbon sink material that can reduce landfill gas emissions and pollutant leaching.

关键词： Soil amendment Biochar-clay composite Soil carbon Soil suction Soil depth

A UNIQUENESS THEOREM FOR HOLOMORPHIC MAPPIngS IN THE DISK SHARIng TOTALLY GEODESIC HYPERSURFACES

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Acta Mathematica Scientia 2022年第4期42卷 1631-1644页

作者： Jiaxing HUAng Tuen wai ng College of Mathematics and Statistics Shenzhen UniversityShenzhen518060China Department of Mathematics The University of Hong KongPokfulamHong Kong

In this paper,we prove a Second Main Theorem for holomorphic mappings in a disk whose image intersects some families of nonlinear hypersurfaces(totally geodesic hypersurfaces with respect to a meromorphic connection) in the complex projective space P^(k).This is a generalization of Cartan’s Second Main *** a consequence,we establish a uniqueness theorem for holomorphic mappings which intersect O(k^(3)) many totally geodesic hypersurfaces.

关键词： Second Main Theorem meromorphic connection totally geodesic hypersurfaces uniqueness theorem