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First principles investigation of protactinium-based oxide-perovskites for flexible opto electronic devices

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Chinese Physics B 2017年第4期26卷 368-376页

作者： Nazia Erum Muhammad azhar iqbal Physics Department University of the PunjabQuaid-e-Azam CampusP.O.Box 54590 LahorePakistan School of Science University of Management and TechnologyC-llJohar Town CampusP.O.Box 54770 LahorePakistan

The structural,elastic,mechanical,electronic,and optical properties of KPaO_3 and RbPaO_3 compounds are investigated from first-principles calculations by using the WIEN2 k code in the frame of local density approximation（LDA） and generalized gradient approximation（GGA）.The calculated ground state quantities,such as lattice constant（α_0）,ground state energy（E）,bulk modulus（S）,and their pressure derivative（B_p） are in reasonable agreement with the present analytical and previous theoretical results and available experimental *** on several elastic and mechanical parameters,the structural stability,hardness,stiffness and the brittle and ductile behaviors are discussed,which reveal that protactiniumbased oxide series of perovskites is mechanically stable and possesses weak resistance to shear deformation compared with resistance to unidirectional compression while flexible and covalent behaviors are dominated in *** analysis of band profile through Trans-Blaha modified Becke-Johnson（TB-mBJ） potential highlights the underestimation of bandgap with traditional density functional theory（DFT） *** contribution of electronic states is investigated by means of total and partial density of states and it can be evaluated that both compounds are（Γ-Γ） direct bandgap *** fundamental optical properties are analyzed while attention is paid to absorption and reflection spectra to explore extensive absorptions and reflections of these compounds in high frequency *** present method represents an influential approach to calculating the whole set of elastic,mechanical,and opto-electronic parameters,which would conduce to the understanding of various physical phenomena and empower the device engineers to implement these materials in flexible opto-electronic applications.

关键词： first-principles study oxide perovskites mechanical property electronic property optical property

Room Temperature Ferromagnetism in Ga1-xHoxN （x=0.0 and 0.05） Diluted Magnetic Semiconductor Thin Films

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Chinese Journal of Chemical Physics 2012年第3期25卷 313-317,373,374页

作者： Ghulam Murtaza Rai Muhammad azhar iqbal Yong-bing Xu lain Gordon Will Qasim Mahmood Department of Physics University of the Punjab Lahore 54590 Pakistan Spintronics Laboratory Department of Electronics The University of York York Y010 5DD UK

Holmium doped GaN diluted magnetic semiconductor thin films have been prepared by thermal evaporation technique and subsequent ammonia annealing. X-ray diffraction mea- surements reveal all peaks belong to the purely hexagonal wurtzite structure. Surface mor- phology and composition analysis were carried out by scanning electron microscopy and energy dispersive spectroscopy respectively. The room temperature ferromagnetic proper- ties of Gal-xHoxN （x=0.0, 0.05） films were analyzed using vibrating sample magnetometer at room temperature. Magnetic measurements showed that the undoped films （i.e. GaN） exhibited diamagnetic behavior, while the Ho-doped （Gao.95Hoo.05N） film exhibited a ferro- magnetic behavior.

关键词： Diluted magnetic semiconductor Holmium doping X-ray diffraction Scan-ning electron microscopy Room temperature ferromagnetism

Lithium-ion full cell with high energy density using nickel-rich LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 cathode and SiO-C composite anode

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International Journal of Minerals,Metallurgy and Materials 2018年第12期25卷 1473-1481页

作者： azhar iqbal Long Chen Yong Chen Yu-xian Gao Fang Chen Dao-cong Li Institute of Engineering Research Hefei Guoxuan High-Tech Power Energy CO. Ltd

A high-energy-density Li-ion battery with excellent rate capability and long cycle life was fabricated with a Ni-rich layered LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 cathode and Si O-C composite anode. The LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 and Si O-C exhibited excellent electrochemical performance in both half and full cells. Specifically, when integrated into a full cell configuration, a high energy density(280 Wh·kg^(-1)) with excellent rate capability and long cycle life was attained. At 0.5 C, the full cell retained 80% of its initial capacity after 200 charge/discharge cycles, and 60% after 600 cycles, indicating robust structural tolerance for the repeated insertion/extraction of Li^+ ions. The rate performance showed that, at high rate of 1 C and 2 C, 96.8% and 93% of the initial capacity were retained, respectively. The results demonstrate strong potential for the development of high energy density Li-ion batteries for practical applications.

关键词： high energy density full cell rate performance high capacity cathode

Large-energy-shift photon upconversion in degenerately doped InP nanowires by direct excitation into the electron gas

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Nano Research 2013年第10期6卷 752-757页

作者： Kilian Mergenthaler azhar iqbal Jesper Wallentin Sebastian Lehmann Magnus T. Borgstrom Lars Samuelson Arkady Yartsev Mats-Erik Pistol Solid State Physics/The Nanometer Structure Consortium Lund University P. O. Box 118 SE-22100 Lund Sweden Division of Chemical Physics Lund University P O. Box 118 SE-22100 Lund Sweden

Realizing photon upconversion in nanostructures is important for many next- generation applications such as biological labelling, infrared detectors and solar cells. In particular nanowires are attractive for optoelectronics because they can easily be electrically contacted. Here we demonstrate photon upconversion with a large energy shift in highly n-doped InP nanowires. Crucially, the mechanism responsible for the upconversion in our system does not rely on multi-photon absorption via intermediate states, thus eliminating the need for high photon fluxes to achieve upconversion. The demonstrated upconversion paves the way for utilizing nanowires--with their inherent flexibility such as electrical contactability and the ability to position individual nanowires--for photon upconversion devices also at low photon fluxes, possibly down to the single photon level in optimised structures.

关键词： nanowires photon upconversion photoluminescence indium phosphide

Influence of Rare ***3＋ Doping on the Structural, Microstructure and Magnetic Properties of ZnO Bulk and Thin Film Systems

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Chinese Journal of Chemical Physics 2011年第3期24卷 353-357,I0004页

作者： Ghulam Murtaza Rai Muhamlnad azhar iqbal Yongbingxu Iain Gordon Will wenzhang 巴基斯坦旁遮普大学物理系拉合尔54590 英国约克大学电子部自旋电子学实验室约克YO105DD

We have investigated the doping behavior of rare earth element holmium （Ho3＋） in ZnO semiconductor. The structural, microstructure, and magnetic properties of Zn1-xHoxO （x=0.0, 0.04, and 0.05） thin films deposited on Si（100） substrate by thermal evaporation technique were studied. The ceramic targets were prepared by conventional solid state ceramic technique. The pallets used as target were final sintered at 900℃ in the presence of N2 atmosphere. The experimental results of X-ray diffraction （XRD） spectra, surface morphology, and magnetic properties show that the Ho3＋ doped ZnO thin films has a strong influence on the materials properties. The higher angle shift in peak position and most preferred （101） orientation were observed in XRD pattern. These spectra confirmed the substitution of Ho3＋ in ZnO lattice. The surface morphology and stoichiometry for both bulk and thin films were analyzed by scanning electron microscopy and energy dispersive spectroscopy. It was observed that grain size decreases with the increase of Ho3＋. Room temperature ferromagnetism was observed for Zn0.95Ho0.050 films. The ferromagnetism might be attributed to the substitution of Ho ions for Zn2＋ in ZnO lattices.

关键词： Diluted magnetic semiconductor Structural analysis Scanning electron mi- croscope Magnetic property

Attitudes and understanding of complementary and alternative medicine in cancer care:An exploratory study of patients’perspectives in Karachi,Pakistan

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Asian Pacific Journal of Tropical Medicine 2023年第9期16卷 400-408页

作者： Shahlla Imam Muneeba Aijaz Wajiha Iffat Shazia Qasim Jamshed Nahlah Elkudssiah Ismail Ganesh Sritheran Paneerselvam Khang Wen Goh Long Chiau Ming Halima Sadia iqbal azhar Department of Pharmacognosy Faculty of Pharmacy and Pharmaceutical SciencesUniversity of KarachiSindh 75270Pakistan Department of Pharmacognosy Institute of Pharmaceutical SciencesJinnah Sindh Medical UniversityKarachiSindh 75510Pakistan Department of Pharmaceutics Dow College of PharmacyDow University of Health SciencesKarachiSindh 75270Pakistan Clinical Pharmacy and Practice Faculty of PharmacyUnivesiti Sultan Zainal Abidin(UNISZA)Besut22200TerengganuMalaysia Malaysian Academy of Pharmacy Puchong 47160SelangorMalaysia Clinical Pharmacy and Pharmacy Practice Unit Faculty of PharmacyAIMST University08100 BedongKedahMalaysia School of Pharmacy Taylor’s UniversitySunway CityMalaysia Faculty of Data Science and Information Technology INTI International University71800 NilaiMalaysia School of Medical and Life Sciences Sunway University47500 Sunway CityMalaysia Department of Pharmacy Practice Faculty of PharmacyJinnah Women UniversityKarachiPakistan

Objective:To evaluate the prevalence and types of complementary and alternative medicine(CAM)modalities among patients with cancer in Karachi,***:This descriptive cross-sectional study was conducted from March 2021 to December *** hundred patients with cancer were invited to participate in the *** databases,namely,Google scholar,Publons,EMBASE,PubMed,Chinese National Knowledge Infrastructure Database,and ResearchGate was used for questionnaire *** self-administered survey included questions on demographic characteristics,education level,socio-economic conditions and information about CAM therapies,prevalence,effectiveness,and common CAM *** analysis was conducted using SPSS software version ***:Out of the 500 invited patients,433(86.6%)successfully completed and returned the *** contrast to patients who were with younger,highly educated,professionally active,higher income,and had advanced cancer,time since diagnosis,type of treatment,cancer types and family history are significantly associated with CAM *** results showed that 59.8%of the participants were acquainted with complementary and/or alternative medicine and considered safe owing to its natural *** prevalence of CAM usage among cancer patients was 40.9%and the most widely used CAM modality was herbal medicine(27.7%)and dietary supplements(28.8%).Patients used CAM as a complementary therapy to improve the morphological parameter(28.2%),strengthen the immune system(6.8%),and to decrease the side effects of conventional treatment(18.1%).Most of the respondents get the information regarding CAM therapy from the electronic media(43.2%)and the family members(48%)rather than healthcare ***:Participants used CAM modalities along with the conventional health care *** multicentre studies should be conducted to provide information regarding the usage of CAM therapies and their eventual benefi

关键词： Alternative medicine Cancer patients Complementary medicine Cross-sectional study

Enhancing cotton resilience to challenging climates through genetic modifications

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Journal of Cotton Research 2024年第2期7卷 196-206页

作者： AHMED Ali Ijaz KHAN Azeem iqbal NEGM Mohamed A.M. iqbal Rida azhar Muhammad Tehseen KHAN Sultan Habibullah RANA Iqrar Ahmad Department of Plant Breeding and Genetics University of AgricultureFaisalabadFaisalabad 38000Pakistan Cotton Research Institute-Giza GizaEgypt Centre for Advanced Studies in Agriculture and Food Security University of AgricultureFaisalabadFaisalabad 38000Pakistan Centre of Agricultural Biochemistry and Biotechnology University of AgricultureFaisalabadFaisalabad 38000Pakistan School of Agriculture Sciences Zhengzhou UniversityZhengzhou 450000China

Cotton is one of the most important fiber crops that plays a vital role in the textile *** production has been unstable over the years due to climate change induced biotic stresses such as insects,diseases,and weeds,as well as abiotic stresses including drought,salinity,heat,and *** breeding methods have been used to breed climate resilient cotton,but it requires a considerable amount of time to enhance crop tolerance to insect pests and changing climatic conditions.A promising strategy for improving tolerance against these stresses is genetic *** review article discusses the role of genetic engineering in cotton *** essential concepts and techniques include genome editing via clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein 9(CRISPR-Cas9),overexpression of target genes,downregulation using RNA interference(RNAi),and virus-induced gene silencing(VIGS).Notably,the Agrobacterium-mediated transformation has made significant contributions to using these techniques for obtaining stable transgenic plants.

关键词： Cotton Genome editing Drought Salinity Heat

三元前驱体微观形貌结构对LiNi0.85Co0.10Mn0.05O2正极材料性能的影响

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储能科学与技术 2020年第2期9卷 409-414页

作者：陈龙张二冬 iqbal azhar 李道聪杨茂萍夏昕合肥国轩高科动力能源有限公司工程研究总院

通过调节共沉淀制备过程中氨水浓度和pH值控制三元前驱体的成核与长大过程,制备得到团聚态和均一态两种微观结构的Ni0.85Co0.10Mn0.05（OH）2前驱体。两种前驱体的粒度分布,比表面,振实等理化指标接近。烧结后制备LiNi0.85Co0.10Mn0.05O... 详细信息

通过调节共沉淀制备过程中氨水浓度和pH值控制三元前驱体的成核与长大过程,制备得到团聚态和均一态两种微观结构的Ni0.85Co0.10Mn0.05（OH）2前驱体。两种前驱体的粒度分布,比表面,振实等理化指标接近。烧结后制备LiNi0.85Co0.10Mn0.05O2三元正极材料测试电化学性能表明,两种正极的克容量及倍率性能相近,但具有均一态结构的正极材料1C循环50周后容量保持率达到98.3%,高于团聚态结构正极材料的96.9%循环保持率。d Q·d V-1分析表明,具有均一态结构的正极材料循环前后的氧化还原峰位置和压差稳定,显示了较小的极化损失。进一步通过SEM表征,循环前后具有均一态结构的正极材料断面密实,显示出较高的机械强度,因此在充放电循环过程中颗粒无明显破碎,有较稳定的电极/电解液界面,可改善循环性能。

关键词：锂离子电池正极前驱体二次球形貌 LiNi0.85Co0.10Mn0.05O2

A new model of flow over stretching(shrinking)and porous sheet with its numerical solutions

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Applied Mathematics(A Journal of Chinese Universities) 2024年第3期39卷 381-397页

作者： azhar Ali Dil Nawaz Khan Marwat Saleem Asghar Department of Mathematics Islamia College Peshawar 25120Jamrod roadPeshawarKhyber PakhtunkhwaPakistan Department of Mathematics COMSATS Institute of Information TechnologyPark RoadTarlai KalanIslamabad 45550Pakistan

The viscous fluid flow and heat transfer over a stretching(shrinking)and porous sheets of nonuniform thickness are investigated in this *** modeled problem is presented by utilizing the stretching(shrinking)and porous velocities and variable thickness of the sheet and they are combined in a ***,the new problem reproduces the different available forms of flow motion and heat transfer maintained over a stretching(shrinking)and porous sheet of variable thickness in one *** a result,the governing equations are embedded in several parameters which can be transformed into classical cases of stretched(shrunk)flows over porous sheets.A set of general,unusual and new variables is formed to simplify the governing partial differential equations and boundary *** final equations are compared with the classical models to get the validity of the current simulations and they are exactly matched with each other for different choices of parameters of the current problem when their values are properly adjusted and ***,we have recovered the classical results for special and appropriate values of the parameters(δ_(1),δ_(2),δ_(3),c,and B).The individual and combined effects of all inputs from the boundary are seen on flow and heat transfer properties with the help of a numerical method and the results are compared with classical solutions in special *** is noteworthy that the problem describes and enhances the behavior of all field quantities in view of the governing *** result shows that the dual solutions can be found for different possible values of the shrinking parameter.A stability analysis is accomplished and apprehended in order to establish a criterion for the determinations of linearly stable and physically compatible *** significant features and diversity of the modeled equations are scrutinized by recovering the previous problems of fluid flow and heat transfer from a uniformly heated sheet

关键词： permeable stretching(shrinking)sheets sheet of variable thickness heat transfer numerical(dual)solutions stability analysis