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Enhanced thermoelectric properties of SnSe thin films grown by pulsed laser glancing-angle deposition

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Journal of Materiomics 2017年第4期3卷 293-298页

作者： Chun Hung Suen Dongliang Shi Y.Su Zhi Zhang Cheuk ho Chan Xiaodan Tang Y.Li kwok ho lam Xinxin Chen B.L.Huang X.Y.Zhou Ji-Yan Dai Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Electrical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina College of Physics Chongqing UniversityChongqing 401331China

SnSe single crystals have been demonstrated to possess excellent thermoelectric *** this work,we demonstrate a grain size control method in growing nanocrystalline SnSe thin films through a glancing angle pulsed-laser deposition *** characterization reveals that the SnSe film deposited at a normal angle has a preferred orientation along a axis,while by contrast,the SnSe film deposited at an 80glancing angle develops a nanopillar structure with the growth direction towards the incident atomic *** glancing angle deposition greatly reduces the grain size of the thin film due to a shadowing effect to the adatoms,resulting in significantly increased power factor for more than 100%.The maximum Seebeck coefficient and power factor are 498.5 mV=K and 18.5 mWcm^(-1)K^(-2),*** enhancement of thermoelectric property can be attributed to the potential barrier scattering at grain boundaries owing to the reduced grain size and increased grain boundaries in the *** this enhanced power factor,and considering the fact that the nanopillar structure should have much lower thermal conductivity than a plain film,the zT value of such made SnSe film could be significantly larger than the corresponding single crystal film,making it a good candidate for thin film-based thermoelectric device.

关键词： Thermoelectric SnSe Glancing angle Potential barrier scattering

PZT FILM GENERATOR DRIVEN BY ULTRASONIC WAVE

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Journal of Advanced Dielectrics 2012年第3期2卷 1-5页

作者： QIFA ZhoU kwok ho lam BENPENG ZHU XIABING ZHANG K.KIRK SHUNG TONGQING YANG S.TAKEUCHI NIH Transducer Resource Center Department of Biomedical Engineering University of Southern California Los Angeles CA 90089 USA Department of Electronic Science and Technology Huazhong University of Science and Technology Wuhan 430072 China Functional Materials Research Laboratory Tongji University Siping Road 1239 ShanghaiChina Medical Engineering Course Graduate School of Engineering Toin University of Yokohama Yokohama 225-8501 Japan

Energy harvesting was demonstrated in hydrothermal PZT nanocrystal films driven by *** high temperature sintering and solution infiltration,PZT films with nanograin sizewas found to exhibit bulk-like properties such as large remnant polarization of 42μC/cm^(2).Withthe bulk-like properties,a packaged PZT film device was demonstrated to be capable of convertingmechanical energy carried by the ultrasonic wave into electrical energy in a reliable and efficient *** result suggests an alternative potential solution for energy harvesting application.

关键词： PZT film ultrasonic energy harvesting

Building an e-Portfolio with a learning plan centric approach

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第1期13卷 37-47页

作者： lam-for kwok Ka-shing CHAN Department of Computer Science City University of Hong Kong

A portfolio records achievements in the personal growth process. A personal development e-Portfolio assists an individual in planning his/her development path and reflecting upon his/her own learning. In this article, we propose an approach to constructing a personal development portfolio. An abstract information model is presented to support such a portfolio. The information model is proposed based upon and according to IMS standards. The use of this approach is illustrated by way of a prototype e-Portfolio system. The usage scenario and limitations of such a portfolio are also discussed.

关键词： E-Portfolio Educational technology system Lifelong learning

TRMT6 and TRMT61A facilitated acute pancreatitis severity via regulation of neutrophil function

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Science China Life Sciences 2025年

作者： Yuan Dong Li Su Sin Man lam Cen Yan Yalan Deng Guotao Lu Jinkui Yang Guanghou Shui Yingmei Feng Beijing Institute of Hepatology Beijing Youan HospitalCapital Medical University Department of Science and Development Beijing Youan HospitalCapital Medical University Laboratory for Clinical Medicine Capital Medical University Neuroscience Research Institute Peking University Center of Medical and Health AnalysisPeking University State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of Sciences Pancreatic Center Department of GastroenterologyAffiliated Hospital of Yangzhou UniversityYangzhou University Beijing Key Laboratory of Diabetes Research and Care Department of EndocrinologyBeijing Tongren HospitalCapital Medical University

Dear Editor,Type 2 diabetes mellitus (T2DM) has been identified as a risk factor for increased severity in acute pancreatitis (AP)(Mikóet al,2018).however,to date,no studies have simultaneously included healthy individuals,T2DM patients,and AP patients to investigate which diabetes-associated metabolites are linked to AP severity.

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SYNTHESIS,CHARACTERIZATION AND PhoTOLUMINESCENT PROPERTIES OF NEW PLATINUM-CONTAINING POLY(FLUORENYLENEETHYNYLENE) ANChoRED WITH CARBAZOLE PENDANTS

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Chinese Journal of Polymer Science 2009年第4期27卷 455-464页

作者： Cheuk-lam ho 黄维扬 Department of Chemistry and Centre for Advanced Luminescence Materials Hong Kong Baptist UniversityWaterloo RoadKowloon Tong Invited lecture presented at the 4(th) International Conference on Photoresponsive Organics and Polymers

A new luminescent and thermally stable platinum(Ⅱ) polyyne polymer trans-[-Pt(PBu_3)_2C=CArC=C-]_n(P1) containing the 2,7-fluorene chromophoric spacer substituted by pendant carbazolyl group via long alkyl bridges. The regiochemical structures of these compounds were studied by various spectroscopic *** report the photophysical properties of this group 10 polymetallayne and a comparison was made to its binuclear model complex trans-[Pt(Ph)(PEt_3)_2C≡CArC≡CPt(Ph)(PEt_3)_2](M1) as well as to those wit...

关键词： Alkyne Carbazole Fluorene Photoluminescence Platinum

Disease progression after discontinuation of corticosteroid treatment in a COVID-19 patient with ARDS

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Asian Pacific Journal of Tropical Medicine 2022年第1期15卷 47-48页

作者： lam Nguyen-ho Department of Internal Medicine University of Medicine and Pharmacy at Ho Chi Minh CityVietnam University Medical Center HCMC Ho Chi Minh CityVietnam

Excessive acute inflammatory response in coronavirus-induced disease 2019(COVID-19)patients results in multiple organ injury,especially acute respiratory distress syndrome(ARDS),contributing to a high mortality of the disease[1,2].More evidence showed that corticosteroid,an immunomodulatory agent,reduces both the need of invasive mechanical ventilation and lowers the mortality of severe COVID-19 ***,its optimal dose and therapeutic duration is still *** RECOVERY trial revealed that using corticosteroid up to 10 days reduced the mortality of hospitalized COVID-19 patients[3]and a finding also upheld by a meta-analysis by Cano et al.[4].To the best of our knowledge,currently,there is no study evaluating disease progression after discontinuation of corticosteroid treatment in COVID-19 patients with ARDS.

关键词： mortality acute distress

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环形内窥镜超声换能器的研制

中国医疗器械信息 2014年第4期20卷 6-10页

作者：陈燕周丹林国豪吴锦川戴吉岩罗豪甦陈王丽华香港理工大学应用物理系深圳市理邦精密仪器股份有限公司深圳518067 香港理工大学电机工程系汕头市超声仪器研究所有限公司汕头515041 中国科学院上海硅酸盐研究所信息功能材料与器件研究中心上海200050

本论文报道了当前环形内窥镜超声换能器的两种不同的制备方法以及其性能的表征。方法一为先采用切割薄片高性能压电PMN-PT单晶和其1~3复合材料制备平面阵列，然后将平面阵列卷曲成圆环形阵列。所制备的128阵元PMN-PT单晶阵列具有较宽带... 详细信息

本论文报道了当前环形内窥镜超声换能器的两种不同的制备方法以及其性能的表征。方法一为先采用切割薄片高性能压电PMN-PT单晶和其1~3复合材料制备平面阵列，然后将平面阵列卷曲成圆环形阵列。所制备的128阵元PMN-PT单晶阵列具有较宽带宽达78%，64阵元PMN-PT单晶/环氧1~3复合阵列带宽高达102%。方法二为旋转切割法，通过直接对带有匹配层和背衬材料的压电陶瓷管进行切割，制作不同尺寸及频率的环形超声内窥镜阵列。

关键词：内窥镜超声换能器环形阵列制备方法性能表征

Ferroptosis and glaucoma: implications in retinal ganglion cell damage and optic nerve survival

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Neural Regeneration Research 2023年第3期18卷 545-546页

作者： Ming Yang kwok-Fai So Wai-Ching lam Amy Cheuk Yin Lo Department of Ophthalmology School of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Sciences The University of Hong KongHong Kong Special Administrative RegionChina GHM Institute of CNS Regeneration Jinan UniversityGuangzhouGuangdong ProvinceChina

Glaucoma and visual pathway degeneration:Glaucoma is the leading cause of irreversible blindness worldwide,which leads to a progressive loss of *** can be classified into two types:primary open-angle glaucoma and primary closed-angle *** open-angle glaucoma can be caused by the blockage of the trabecular meshwork,and this results in elevation of the intraocular pressure(IOP),leading to retinal ganglion cell(RGC)***,many glaucoma patients have normal IOP;this is known as normal-tension ***,excitotoxic damage and oxidative stress can also lead to RGC damage in normal-tension glaucoma(Almasieh et al.,2012).Glaucomatous genes such as TIGR,OPTN,and CYP1B1 have been suggested to contribute to the pathogenesis of ***,some glaucomatous patients may remain asymptomatic in the early,moderate,and late *** type of glaucoma is primary closed-angle *** this clinical condition,a relative pupillary block is contributed by the iris obstructing aqueous *** patients may suffer from corneal swelling,headache,nausea,and blurred vision during the acute phase.

关键词： glaucoma damage degeneration

Occurrence and fate of endogenous steroid hormones,alkylphenol ethoxylates, bisphenol A and phthalates in municipal sewage treatment systems

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Journal of Environmental Sciences 2017年第11期29卷 49-58页

作者： Qian Wu James C.W.lam Karen Y.kwok Mirabelle M.P.Tsui Paul K.S.lam State Key Laboratory in Marine Pollution (SKLMP) Department of Biology and Chemistry Research Centre for the Oceans and Human Health Shenzhen Key Laboratory for Sustainable Use of Marine Biodiversity City University of Hong Kong Department of Science and Environmental Studies The Education University of Hong of Kong

Steroid hormones, alkylphenol ethoxylates（APEOs） and phthalic acid esters（PAEs） are emerging endocrine disrupting chemicals（EDCs） that can interfere with the endocrine function in organisms at low concentrations. The occurrence, distribution behavior, removal rate and the fate of 31 target EDCs in sewage treatment plants, which consist of various treatment facilities and receiving water in hong Kong, were investigated. Estrone,nonylphenol-di-ethoxylate and diethyl phthalate were found to be dominant in each group of influent samples with concentrations ranging from 11–33, 747–3945 and 445–4635 ng/L,respectively. Conversely, progesterone, nonylphenol-mono-ethoxylate and bis（2-ethylhexyl）phthalate were the most abundant in dewatered sludge, with concentrations ranging from 0.9–237, 75–19,743 and 4310–37,016 ng/g（dry weight）. The removal rates of primary sedimentation and disinfection approaches were lower than 30% for most of the chemicals,while those of activated sludge and reverse osmosis were greater than 80% for more than two-thirds of the compounds, noticeably decreasing the estrogenic risk of sewage discharged into the environment. Steroid hormones were removed via biological degradation, while some APEOs and PAEs adsorbed to the sludge. Victoria Harbor poses a low to medium estrogenic risk mainly contributed by estrone and estradiol and deserves attention.

关键词： Endocrine disruptor Steroid hormone Alkylphenol ethoxylate Phthalic acid ester Risk assessment