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A brief review of formation energies calculation of surfaces and edges in semiconductors

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Journal of Semiconductors 2020年第6期41卷 3-18页

作者： chuen-Keung sin Jingzhao Zhang Kinfai Tse Junyi Zhu The Chinese University of Hong Kong Hong KongChina

To have a high quality experimental growth of crystals, understanding the equilibrium crystal shape(ECS) in different thermodynamic growth conditions is important. The factor governing the ECS is usually the absolute surface formation energies for surfaces(or edges in 2D) in different orientations. Therefore, it is necessary to obtain an accurate value of these energies in order to give a good explanation for the observation in growth experiment. Historically, there have been different approaches proposed to solve this problem. This paper is going to review these representative literatures and discuss the pitfalls and advantages of different methods.

关键词： surface first principle morphology

Stable Intrinsic Long Range Antiferromagnetic Coupling in Dilutely V Doped Chalcopyrite

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Chinese Physics Letters 2020年第2期37卷 60-64页

作者： Weiyi Gong Ching-Him Leung chuen-Keung sin Jingzhao Zhang Xiaodong Zhang Bin Xi Junyi Zhu Department of Physics The Chinese University of Hong KongHong Kong

A stable and long-range antiferromagnetic(AFM)coupling without charge carrier mediators has been searched for a long time,but the existence of this kind of coupling is still *** on first principle calculations,we systematically study carrier free long-range AFM coupling in four transition metal chalcopyrite systems:ABTe2(A=Cu or Ag,B=Ga or In)in the dilute doping *** AFM coupling is mainly due to the p-d coupling and electron redistribution along the interacting *** relatively small energy difference between p and d orbitals,as well as between dopants and atoms in the middle of the chain can enhance the stability of longrange AFM configurations.A multi-band Hubbard model is proposed to provide fundamental understanding of long-range AFM coupling.

关键词： coupling Coupling ferromagnetic

A Highly Efficient Aggregation-induced Emission Photosensitizer for Photodynamic Combat of Multidrug-resistant Bacteria

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Chemical Research in Chinese Universities 2021年第1期37卷 150-156页

作者： ZOU Qian WANG Jia-Li WU Ming-Yu KAM LEE sin-Ying FENG Shun CHEN Sijie School of Life Science and Engineering Southwest Jiaotong UniversityChengdu610031P.R.China Ming Wai Lau Centre for Reparative Medicine Karolinska InstitutetHong KongP.R.China

With the antibiotic abuse and the resulting increased antibiotic resistance,the bacterial infection has posed a serious threat to human *** therapy is an effective tool for treating localized and superficial *** is a promising approach for the treatment of superbugs and with minimal risk of induced antibiotic ***,an isoquinolinium-based photosensitizer,LIQ-TPE,with aggregation-induced emission properties is designed and *** is with high 1O2 generation efficiency and shows efficient antibacterial performance towards both Gram-negative and Gram-positive bacteria,and even methicillin-resistant Staphylococcus aureus(MRSA).LIQ-TPE thus shows great promise as an effective antimicrobial agent to combat the menace of multi-drug resistant bacteria.

关键词： Aggregation-induced emission Photosensitizer Isoquinolinium Photodynamic antibiosis

Echocardiographic mapping of left ventricular resynchronization during cardiac resynchronization therapy procedures

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Chinese Medical Journal 2010年第13期123卷 1645-1651页

作者： CHAN ngai-yin CHOY Chi-chung CHEUNG Kar-chun LAU Chun-leung LO Ying-keung CHU Pui-shan YUEN Ho-chuen LAU Suet-ting CHOI Yuen-choi Department of Medicine & Geriatrics Princess Margaret Hospital 2-10 Princess Margaret Hospital Road Lai Chi Kok Kowloon Hong Kong China

Background Cardiac resynchronization therapy （CRT） is an effective electrical therapy for patients with moderate to severe heart failure and cardiac dyssynchrony. This study aimed to investigate the degree of acute left ventricular （LV） resynchronization with biventricular pacing （BVP） at different LV sites and to examine the feasibility of performing transthoracic echocardiography （TTE） to quantify acute LV resynchronization during CRT procedure. Methods Fourteen patients with NYHA Class Ⅲ-Ⅳ heart failure, LV ejection fraction 〈35%, QRS duration 〉120 ms and septal-lateral delay （SLD）〉60 ms on tissue Doppler imaging （TDI）, underwent CRT implant. TDI was obtained from three apical views during BVP at each accessible LV site and SLD during BVP was derived. Synchronicity gain index （Sg） by SLD was defined as （I＋（SLD at baseline - SLD at BVP）/SLD at baseline）. Results Seventy-two sites were studied. Positive resynchronization （R＋, Sg〉1） was found in 42 （58%） sites. R＋ was more likely in posterior or lateral than anterior LV sites （66% vs. 36%, P 〈0.001）. Concordance of empirical LV lead implantation sites and sites with R＋ was 50% （7/14）. Conclusions The degree of acute LV resynchronizaUon by BVP depends on LV lead location and empirical implantation of LV lead results in only 50% concordance with R＋. Performing l-rE during CRT implantation is feasible to identify LV sites with positive resynchronization.

关键词： echocardiography cardiac resynchronization therapy heart failure left ventricular lead device implantation optimization

Attitudes of visitors at adult intensive care unit toward organ donation and organ support

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Chinese Medical Journal 2019年第3期132卷 373-376页

作者： Nga-Wing Tsai Yee-Man Leung Pauline Yeung Ng Ting Liong Sui-Fong Lee Chun-Wai ngai Wai-Ching sin Jenny Koo Wai-Ming Chan Adult Intensive Care Unit Queen Mary HospitalHong Kong 999077China Intensive Care Unit United Christian HospitalHong Kong 999077China Intensive Care Unit Kwong Wah HospitalHong Kong 999077China Central Nursing Department Queen Mary HospitalHong Kong 999077China

The concept of brain death was 1st introduced in the 1960s, providing an essential conceptual change to medical practice,[1] and its diagnosis is based on demonstrating the complete, irreversible cessation of brainste... 详细信息

关键词： brain death toward organ donation organ support

Aggregation and aging of nanoparticle-protein complexes at interfaces studied by evanescent-light scattering microscopy

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Aggregate

Aggregate 2024年第4期5卷 208-219页

作者： Wei Liu Yuwei Zhu Hang Jiang Lidan Zhou Yinan Li Jiahao Wu Jie Han Cheng Yang Jianzhong Jiang To ngai The Key Laboratory of Synthetic and Biological Colloids Ministry of Education&School of Chemical and Material EngineeringJiangnan UniversityWuxiChina Department of Chemistry The Chinese University of Hong KongHong KongChina School of Science and Technology Hong Kong Metropolitan UniversityHong KongChina

Plasma protein-induced aggregation of nanoparticles(NPs)is a crucial issue in many applications,such as drug *** great efforts have been made to inves-tigate the protein adsorption kinetics or protein-induced NPs coalescence in bulk solutions,limited evidence has been uncovered for interfacial ***,disease,medicine,or senility could thoroughly change interfacial physicochemical properties of the inner lining of blood *** including stents and artificial heart valves also have varied and evolutionary ***,there is an urgent need to understand the mechanism behind the non-specific protein adsorption and NP-protein aggregation in such interfacial ***,we use evanescent light scat-tering to observe polystyrene NPs‒fibrinogen aggregation at substrates with varying surface properties.A density-fluctuation correlation function is utilized to reveal the relaxation dynamics of the *** time-resolved and spatial-correlated evi-dence shows that the aging process of such soft materials is out-of-equilibrium,where the dynamics faster and slower than exponential can coexist in one sin-gle relaxation ***,corona formation,inner stress,and interconnection together determine the microstructure,local adhesion,and structural relaxation of the aggregates,which can further correspond to the protein-to-NP ratio as well as the surface chemistry of NPs and substrates.

关键词： aggregate aging evanescent light scattering nanoparticles protein corona

Digesting the World Through Artstic Lens

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Women of China 2019年第6期 46-49页

作者： VICTO ngai 不详

Victo ngai chuen Ching is a Los Angeles-based illustrator from China's Hong Kong Special Administrative Region. She was a Forbes 30 Under 30 (Art and Style) honoree in *** was born in Maoming, a city in South China's Guangdong Province, in 1988. She grew up in Hong Kong, until she was 18. Her parents still live there. She was exposed to Chinese art and crafts, such as nianhua (New Year paintings), gongbihua (fine brushwork), and lianhuanhua (comic books), at a young age.

关键词：艺术视角理解世界

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活性污泥合成聚羟基烷酸酯中单体组分的调控

化工学报 2007年第10期58卷 2427-2431页

作者：蔡萌萌蔡宏单羿王玉洁何丹赵庆良哈尔滨工业大学市政环境工程学院黑龙江哈尔滨150090 香港理工大学土木与结构工程系

聚羟基烷酸酯(PHAs)是一类生物合成的环境友好高分子塑料,具有广泛应用前景。活性污泥合成PHAs可降低PHAs生产成本,实现废物资源化。PHAs的物化性质取决于其单体组分的结构和含量。基于优化PHAs产量的工艺研究,总结了调控活性污泥合成... 详细信息

聚羟基烷酸酯(PHAs)是一类生物合成的环境友好高分子塑料,具有广泛应用前景。活性污泥合成PHAs可降低PHAs生产成本,实现废物资源化。PHAs的物化性质取决于其单体组分的结构和含量。基于优化PHAs产量的工艺研究,总结了调控活性污泥合成的聚羟基丁酸-羟基戊酸(PHBV)中羟基戊酰含量的工艺措施和生化原理。已有研究表明,好氧时,碳源类型决定PHBV中的单体组分;一般地,溶解氧浓度(DO)降低,PHBV中HV含量会增加;污泥来源、pH值以及碳源与氮磷浓度比的变化都会影响HV含量;各参数对PHAs组分的影响存在关联性。展望了调控活性污泥合成PHAs中单体组分的进一步研究方向。

关键词：活性污泥聚羟基烷酸酯工艺条件控制代谢途径聚合物组分

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活性污泥合成聚羟基烷酸酯代谢机制研究进展

环境污染与防治 2008年第6期30卷 78-82,92页

作者：蔡萌萌蔡宏单羿任洁赵庆良哈尔滨工业大学市政环境工程学院黑龙江哈尔滨150090 香港理工大学土木与结构工程系中国香港

聚羟基烷酸酯(PHAs)是生物制备型环境友好塑料,具有广阔的应用前景。活性污泥合成PHAs可降低生产成本,实现废水处理厂剩余污泥的减量化和资源化。研究微生物合成PHAs的代谢机制,有利于优化PHAs的工业化生产,目前其代谢研究多集中在以纯... 详细信息

聚羟基烷酸酯(PHAs)是生物制备型环境友好塑料,具有广阔的应用前景。活性污泥合成PHAs可降低生产成本,实现废水处理厂剩余污泥的减量化和资源化。研究微生物合成PHAs的代谢机制,有利于优化PHAs的工业化生产,目前其代谢研究多集中在以纯菌种合成PHAs,而以活性污泥合成PHAs的研究尚不成熟。资料表明,DO变化对活性污泥合成PHAs的代谢途径有显著影响,进而改变其PHAs产物的产量和单体组成。综述了活性污泥合成PHAs在厌氧/好氧工艺、微氧/好氧工艺、缺氧/好氧工艺、好氧动态底物投加工艺条件下的代谢机制,分析了现有PHAs合成代谢模型中存在的问题,展望了PHAs合成代谢机制研究的发展方向。

关键词：活性污泥溶解氧代谢途径聚羟基烷酸酯