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Rare Metals 2022年第1期41卷 78-85页

作者： Yan-Lian Liu Yong-Hua Sun Ya Zhao chun-Lin Li Fei-Long Zhao Xiao-Hong Yao Rui-Qiang Hang Paul k.chu School of Mechanical Engineering North University of ChinaTaiyuan 030051China Laboratory of Biomaterial Surfaces and Interfaces Institute of New Carbon MaterialsTaiyuan University of TechnologyTaiyuan 030024China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Stents made of nearly equiatomic NiTi alloy are used to treat malignant obstruction caused by cancer,but prevention of re-obstruction after surgery is still a challenge because the bare stents possess poor anticancer and antibacterial properties to inhibit cancer/bacteria *** present work aims at endowing the NiTi alloy with anticancer and antibacterial abilities by surface ***–Ti–O nanoporous layers with different thicknesses were prepared on NiTi by anodization,and biological experiments were conducted to evaluate the effects on gram-positive Staphylococcus aureus,human lung epithelial cancer cells(A549),as well as human endothelial cells(***926).The nanoporous layer with a thickness of 10.1 lm inhibits growth of cancer cells and kill bacteria but shows little adverse effects on normal *** selectivity is related to the larger amount of Ni ions leached from the sample in the acidic microenvironment of cancer cells in comparison with normal *** Ni–Ti–O nanoporous layers are promising as coatings on NiTi stents to prevent re-obstruction after surgery.

关键词： Nickel–titanium alloy Anodization Nanopores Anticancer ability Antibacterial ability

Ultralow-voltage hydrogen production and simultaneous Rhodamine B beneficiation in neutral wastewater

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Journal of Energy Chemistry 2023年第6期81卷 574-582,I0013页

作者： Xiang Peng Song Xie Shijian Xiong Rong Li Peng Wang Xuming Zhang Zhitian Liu Liangsheng Hu Biao Gao Peter kelly Paul k.chu Hubei key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloon 999077Hong KongChina State key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Chemistry and key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063GuangdongChina Surface Engineering Group Manchester Metropolitan UniversityManchester M15GDUK

Electrocatalytic water splitting for hydrogen production is hampered by the sluggish oxygen evolution reaction(OER)and large power consumption and replacing the OER with thermodynamically favourable reactions can improve the energy conversion *** iron corrodes easily and even self-corrodes to form magnetic iron oxide species and generate corrosion currents,a novel strategy to integrate the hydrogen evolution reaction(HER)with waste Fe upgrading reaction(FUR)is proposed and demonstrated for energy-efficient hydrogen production in neutral *** heterostructured MoSe_(2)/MoO_(2) grown on carbon cloth(MSM/CC)shows superior HER performance to that of commercial Pt/C at high current *** replacing conventional OER with FUR,the potential required to afford the anodic current density of 10 m A cm^(-2)decreases by 95%.The HER/FUR overall reaction shows an ultralow voltage of 0.68 V for 10 m A cm^(-2)with a power equivalent of 2.69 k Wh per m^(3)H_(2).Additionally,the Fe species formed at the anode extract the Rhodamine B(Rh B)pollutant by flocculation and also produce nanosized magnetic powder and beneficiated Rh B for value-adding *** work demonstrates both energy-saving hydrogen production and pollutant recycling without carbon emission by a single system and reveals a new direction to integrate hydrogen production with environmental recovery to achieve carbon neutrality.

关键词： Energy-saving hydrogen production Hydrogen evolution reaction Neutral water splitting MoSe_(2)/MoO_(2)heterostructure Environmental recovery

Origin of superior pseudocapacitive mechanism of transition metal nitrides

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Journal of Energy Chemistry 2022年第6期31卷 561-568,I0016页

作者： Chao Huang Ping Qin Dan Li Qingdong Ruan Hao Song Liangliang Liu Yuzheng Wu Yinghe Ma Qingwei Li kaifu Huo Paul k.chu Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China Department of Physics Hong Kong Baptist University(HKBU)Kowloon TongHong Kong 999077China The State key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyWuhan University of Science and TechnologyWuhan 430081HubeiChina Wuhan National Laboratory for Optoelectronics(WNLO) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074HubeiChina Advanced Research Institute for Multidisciplinary Science Qilu University of Technology(Shandong Academy of Sciences)Jinan 250307ShandongChina

Large-scale deployment of Internet of Things (IoT),a revolutionary innovation for a better world,is hampered by the limitation of energy *** transition metal nitride (TMN)-based micro-supercapacitors is a possible solution by taking advantage of the high conductivity,large specific capacitance,and large tap density of the ***,the pseudocapacitive storage mechanism of TMNs is still unclear consequently impeding the design of ***,the functions and mechanism of TMNs with different metal oxynitride (TMNO_(x)) concentrations in pseudocapacitive electrodes are investigated systematically by in situ Raman scattering,ex situ X-ray photoelectron spectroscopy,as well as ion isolation and substitution cyclic *** is found that the specific capacitances of TMNs depend on the TMNO_(x) concentrations and the N–M–O site is responsible for the large pseudocapacitance via the Faradic reaction between TMNO_(x) and OH^(-).Our study elucidates the mechanism pertaining to pseudocapacitive charge storage of TMNs and provides insights into the design and optimization of TMNO_(x) as well as other electrode materials for pseudocapacitors.

关键词： Internet of Things(IoT) Transition metal nitride(TMN) Metal oxynitride Supercapacitors

Effects of N_2/O_2 flow rate on the surface properties and biocompatibility of nano-structured TiO_xN_y thin films prepared by high vacuum magnetron sputtering

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Chinese Physics B 2015年第7期24卷 321-326页

作者： Sehrish Saleem R.Ahmad Uzma Ikhlaq R.Ayub Jin Wei Hong Xu Rui Zhen Li Peng Hui khizra Abbas Paul k.chu Department of Physics Government College University Department of Physics and Materials Science City University of Hong Kong Centre for Advanced Studies in Physics (CASP) Government College University

NiTi shape memory alloys（SMA） have many biomedical applications due to their excellent mechanical and biocompatible properties. However, nickel in the alloy may cause allergic and toxic reactions, which limit some applications. In this work, titanium oxynitride films were deposited on NiTi samples by high vacuum magnetron sputtering for various nitrogen and oxygen gas flow rates. The x-ray diffraction（XRD） and x-ray photoelectron spectroscopy（XPS） results reveal the presence of different phases in the titanium oxynitride thin films. Energy dispersive spectroscopy（EDS） elemental mapping of samples after immersion in simulated body fluids（SBF） shows that Ni is depleted from the surface and cell cultures corroborate the enhanced biocompatibility in vitro.

关键词： titanium oxynitride films magnetron sputtering biocompatibility

SYNTHESIS AND TERAHETZ EMISSION OF CORE-SHELL ZINC OXIDE MESOCRYSTAL MICROSPHERES

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SYNTHESIS AND TERAHETZ EMISSION OF CORE-SHELL ZINC OXIDE MES...

LOW-VOLTAGE AND HIGH-SPEED CMOS/SIMOX TECHNOLOGY

第十六届全国光散射学术会议

作者： Paul k.chu Department of Physics and Materials Science City University of Hong Kong

＜正＞In this report,we first introduce the synthesis of novel uniform-sized,core-shell ZnO mesocrystal microspheres on a large scale using a facile one-pot hydrothermal method in the presence of the watersoluble polymer poly（sodium 4-styrenesulfonate）[1].The mesocrystal forms via a nonclassical crystallization *** intrinsic dipole field introduced by the nanoplatelets as a result of selective adsorption of the polyelectrolyte on some polar surfaces of the nanoparticles acts as the driving *** addition,it plays an important role throughout the mesoscale assembly process from the creation of the

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LOW-VOLTAGE AND HIGH-SPEED CMOS/SIMOX TECHNOLOGY

The modulation of stem cell behaviors by functionalized nanoceramic coatings on Ti-based implants

1995 4th International Conference on Solid-State and Integrated Circuit Technology

作者： Paul k.chu Materials Research Center City University of Hong Kong Hong Kong

＜正＞ Low-voltage high performance 0.5μm CMOS TFSOI/SIMOX devices and ring oscillators with 1.5V and 3.0V supply voltage have been developed. Both N- and P-MOSFETs have well-behaved characteristics. The propagation delays per stage of a 19-stage CMOS/SIMOX ring oscillator are 840ps and 390ps with 1.5V and 3V supply voltage, respectively. The speed of TF CMOS/SIMOX ring oscillator is much faster than that of CMOS devices fabricated in bulk silicon.

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Bioactive Materials 2016年第1期1卷 65-76页

作者： Xiangmei Liu Man Li Yizhou Zhu k.W.k.Yeung Paul k.chu Shuilin Wu Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsFaculty of Materials Science&EngineeringHubei UniversityWuhan 430062China Shenzhen key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital1 Haiyuan 1st RoadFutian DistrictShenzhenChina Division of Spine Surgery Department of Orthopaedics&TraumatologyLi Ka Shing Faculty of MedicineThe University of Hong KongPokfulamHong KongChina Department of Physics&Materials Science City University of Hong KongTat Chee AvenueKowloonHong KongChina

Nanoceramic coating on the surface of Ti-based metallic implants is a clinical potential option in orthopedic *** cells have been found to have osteogenic *** is necessary to study the influences of functionalized nanoceramic coatings on the differentiation and proliferation of stem cells in vitro or in *** this paper,we summarized the recent advance on the modulation of stem cells behaviors through controlling the properties of nanoceramic coatings,including surface chemistry,surface roughness and *** addition,mechanotransduction pathways have also been discussed to reveal the interaction mechanisms between the stem cells and ceramic coatings on Ti-based *** the final part,the osteoinduction and osteoconduction of ceramic coating have been also presented when it was used as carrier of BMPs in new bone formation.

关键词： Nanoceramic coating Ti Stem cell Modulation Implants

Carbon capture and storage(CCS):development path based on carbon neutrality and economic policy

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碳中和(英文) 2022年第1期1卷 71-91页

作者： Minghai Shen Fulin kong Lige Tong Yang Luo Shaowu Yin chuanping Liu Peikun Zhang Li Wang Paul k.chu Yulong Ding School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry University of Science and Technology BeijingBeijing 100083China Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina Department of Materials ETH ZurichVladimir‑Prelog‑Weg 58093 ZurichSwitzerland Birmingham Centre for Energy Storage and School of Chemical Engineering University of BirminghamBirmingham B152TTUK.

In order to limit global warming to 2°C,countries have adopted carbon capture and storage(CCS)technologies to reduce greenhouse gas ***,it is currently facing challenges such as controversial investment costs,unclear policies,and reduction of new energy power generation *** particular,some CCS projects are at a *** promote the development of CCS projects in different countries,this paper reviews and compares energy conservation and emission reduction policies and different national *** a policy perspective,CCS-driven policies are *** on this,corresponding policy recommendations are put forward,in order to promote the healthy development of global CCS technology and deal with climate issues more *** less than 10 years away from the short-term goal,promoting the development and application of CCS projects requires scientific research from universities,enterprises and governments in order to attain zero or negative CO_(2)*** the basis of focusing on the development of CCS technology,according to the actual situation of each country,the appropriate application of CCS engineering should focus on the development of science and technology,rather than a unified requirement around the world.

关键词： CCS Carbon neutralility Government policies Emission target

Engineered polycaprolactone–magnesium hybrid biodegradable porous scaffold for bone tissue engineering

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Progress in Natural Science:Materials International 2014年第5期24卷 561-567页

作者： Hoi Man Wong Paul k.chu Frankie k.L.Leung kenneth M.C.Cheung keith D.k.Luk kelvin W.k.Yeung Department of Orthopaedics and Traumatology The University of Hong Kong Shenzhen key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital Department of Physics and Materials Science City University of Hong Kong Peking University Shenzhen Institution

In this paper, we describe the fabrication of a new biodegradable porous scaffold composed of polycaprolactone(PCL) and magnesium(Mg)micro-particles. The compressive modulus of PCL porous scaffold was increased to at least 150% by incorporating 29% Mg particles with the porosity of 74% using Micro-CT analysis. Surprisingly, the compressive modulus of this scaffold was further increased to at least 236% when the silane-coupled Mg particles were added. In terms of cell viability, the scaffold modified with Mg particles significantly convinced the attachment and growth of osteoblasts as compared with the pure PCL scaffold. In addition, the hybrid scaffold was able to attract the formation of apatite layer over its surface after 7 days of immersion in normal culture medium, whereas it was not observed on the pure PCL scaffold. This in vitro result indicated the enhanced bioactivity of the modified scaffold. Moreover, enhanced bone forming ability was also observed in the rat model after 3 months of implantation. Though bony in-growth was found in all the implanted scaffolds. High volume of new bone formation could be found in the Mg/PCL hybrid scaffolds when compared to the pure PCL scaffold. Both pure PCL and Mg/PCL hybrid scaffolds were degraded after 3 months. However, no tissue inflammation was observed. In conclusion, these promising results suggested that the incorporation of Mg micro-particles into PCL porous scaffold could significantly enhance its mechanical and biological properties. This modified porous bio-scaffold may potentially apply in the surgical management of large bone defect fixation.

关键词： Magnesium Polycaprolactone Biodegradability Biocompatibility Mechanical properties

CsPbBr_(3)-DMSO merged perovskite micro-bricks for efficient X-ray detection

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Nano Research 2023年第7期16卷 9983-9989页

作者： Tongyu Shi Wenjun Liu Jiongtao Zhu Xiongsheng Fan Zhengyu Zhang Xingchen He Rui He Jiahong Wang kezhen Chen Yongshuai Ge Xiangming Sun Yanliang Liu Paul k.chu Xue-Feng Yu Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Inorganic perovskite wafers with good stability and adjustable sizes are promising in X-ray detection but the high synthetic temperature is a ***,dimethyl sulfoxide(DMSO)is used to prepare the CsPbBr_(3)micro-bricks powder at room *** CsPbBr_(3)powder has a cubic shape with few crystal defects,small charge trap density,and high crystallinity.A trace amount of DMSO attaches to the surface of the CsPbBr_(3)micro-bricks via Pb-O bonding,forming the CsPbBr_(3)-DMSO *** hot isostatic processing,the released DMSO vapor merges the CsPbBr_(3)micro-bricks,producing a compact and dense CsPbBr_(3)wafer with minimized grain boundaries and excellent charge transport *** CsPbBr_(3)wafer shows a large mobility-lifetime(μτ)product of 5.16×10^(-4)cm^(2)·V^(-1),high sensitivity of 14,430μC·Gyair^(-1)·cm^(-2),low detection limit of 564 nGyair·s^(-1),as well as robust stability in X-ray *** results reveal a novel strategy with immense practical potential pertaining to high-contrast X-ray detection.

关键词： CsPbBr_(3)-DMSO inorganic perovskites wafer grain growth crystal defect X-ray detector