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Tetra-EDOT substituted 3D electrochromic polymers with lower band gaps

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Science China Chemistry 2017年第1期60卷 90-98页

作者： Jingjing Shi imran murtaza Shan Shao Xiaosi Zhu Yang Zhao Mengmeng Zhu Osamu Goto Hong Meng School of Advanced Materials Peking University Shenzhen Graduate School Key Laboratory of Flexible Electronics & Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Department of Physics International Islamic University

A couple of novel electrochromic materials poly(2,3,4,5-tetrakis(2,3-hydrothieno[3,4-b]dixin-5-yl)-1-methyl-1H-pyrrole)(P(t-EDOT-mPy))and poly(5,5',5",5'"-(thiophene-2,3,4,5-tetrayl)tetrakis(2,3-dihydrothieno[3,4-b][1,4]dioxine))(P(t-EDOTTh))are electrodeposited via multi-position polymerization of their tetra-EDOT substituted monomers t-EDOT-mPy and t-EDOT-Th,*** with the linear 2D structured poly(thiophene)(E_g=2.2 eV)and poly(2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thiophene)(E_g=1.7eV),P(t-EDOT-Th)(E_g=1.62eV)has the lowest band ***,we speculate that the band gaps of the two polymers,having 3D structures,are decreased in contrast to non-substituted polymers or bi-EDOT substituted polymers,thiophene and *** results indicated that P(t-EDOT-Th)thin films are more stable and show higher transmittance amid two polymers,which may find their utilization in organic optoelectronics.

关键词： conjugated 3D polymers electrochromic polythiophene polypyrrole EDOT low band gap electrochemistry

Ag/PEPC/NiPc/ZnO/Ag thin film capacitive and resistive humidity sensors

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Journal of Semiconductors 2010年第5期31卷 45-50页

作者： Kh.S.Karimov Kuan Yew Cheong M.Saleem imran murtaza M.Farooq Ahmad Fauzi Mohd Noor GIK Institute of Engineering Sciences and Technology TopiDistrict SwabiNWFP 23640Pakistan Physical Technical Institute of Academy of Sciences Rudaki Ave 33Dushanbe734025Tajikistan School of Materials & Mineral Resources Engineering Engineering CampusUniversiti Sains Malaysia14300 Nibong TebalPenangMalaysia

A thin film of blended poly-N-epoxypropylcarbazole（PEPC）（25 wt.%）,nickel phthalocyanine（NiPc）（50 wt.%） and ZnO nano-powder（25 wt.%） in benzene（5 wt.%） was spin-coated on a glass substrate with silver electrodes to produce a surface-type Ag/PEPC/NiPc/ZnO/Ag capacitive and resistive *** with two different PEPC/NiPc/ZnO film thicknesses（330 and 400 nm） were fabricated and *** effects of humidity on capacitance and resistance of the Ag/PEPC/NiPc/ZnO/Ag sensors were investigated at two frequencies of the applied voltage：120 Hz and 1 *** was observed that at 120 Hz under humidity of up to 95%RH the capacitance of the sensors increased by 540 times and resistance decreased by 450 times with respect to humidity conditions of 50%RH. It was found that the sensor with a thinner semiconducting film（330 nm） was more sensitive than the sensor with a thicker film（400 nm）.The sensitivity was improved when the sensor was used at a lower frequency as compared with a high *** is assumed that the humidity response of the sensors is associated with absorption of water vapors and doping of water molecules in the semiconductor blend *** had been proven by simulation of the capacitance-humidity relationship.

关键词： organic semiconductor poly-N-epoxypropylcarbazole nickel phthalocyanine nano-powder ZnO sensor

Effect of different catalysts and growth temperature on the photoluminescence properties of zinc silicate nanostructures grown via vapor-liquid-solid method

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Chinese Physics B 2022年第5期31卷 657-665页

作者： Ghfoor Muhammad imran murtaza Rehan Abid Naeem Ahmad Department of Physics International Islamic UniversityIslamabad 44000Pakistan

We explore the photoluminescence properties of zinc silicate(Zn_(2)SiO_(4)) nanostructures synthesized by vapor-liquidsolid(VLS)mode of growth using three different catalysts(Sn,Ag,and Mn).Different catalysts significantly influence the growth rate which in turn has an impact on the structure and hence the photoluminescence of the prepared zinc silicate ***_(2)SiO_(4) has a wide bandgap of about 5.5 eV and in its pure form,it does not emit in visible region due to its inner shell electronic transitions between the 3 d5 energy ***,the incorporation of different catalysts(Sn,Ag and Mn)at different growth temperatures into the Zn_(2)SiO_(4) crystal growth kinetics provides wide visible spectral range of photoluminescence(PL)*** analysis shows broad multi-band spectrum in the visible region and distinct colors(red,yellow,green,blue,cyan and violet)are obtained depending on the crystalline structure of the prepared *** allowed transitions due to the effect of different catalysts on zinc silicate lattice offer a huge cross-section of absorption that generates strong *** correlation between the structural and optical properties of the synthesized nanostructures is discussed in *** synthesized photoluminescent nanostructures have potential applications in solidstate lighting and display devices.

关键词： nanostructures vapor-liquid-solid growth mode photoluminescence spectra fluorescence microscopy

Graphene oxide-lithium-ion batteries:inauguration of an era in energy storage technology

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Clean Energy 2024年第3期8卷 194-205页

作者： Yachana Mishra Aditi Chattaraj Alaa AA Aljabali Mohamed El-Tanani murtaza M.Tambuwala Vijay Mishra School of Bioengineering and Biosciences Lovely Professional UniversityPhagwara(Punjab)-144411India Department of Pharmaceutics&Pharmaceutical Technology Yarmouk UniversityIrbidJordan College of Pharmacy Ras Al Khaimah Medical and Health Sciences UniversityUAE Lincoln Medical School University of LincolnBrayford Pool CampusLincoln LN67TSEnglandUK School of Pharmaceutical Sciences Lovely Professional UniversityPhagwara(Punjab)-144411India

A significant driving force behind the brisk research on rechargeable batteries,particularly lithium-ion batteries(LiBs)in high-performance applications,is the development of portable devices and electric ***-based materials,which have finite specific capacity,make up the anodes of *** attempts are being made to produce novel nanostructured composite anode materials for LiBs that display cycle stability that is superior to that of graphite using graphene ***,using significant amounts of waste graphene oxide from used LiBs represents a fantastic opportunity to engage in waste management and circular *** review outlines recent studies,developments and the current advancement of graphene oxide-based LiBs,including preparation of graphene oxide and utilization in LiBs,particularly from the perspective of energy storage technology,which has drawn more and more attention to creating high-performance electrode systems.

关键词： lithium-ion batteries graphene oxide energy storage technology waste management clean energy

Electronic and thermoelectric properties of YbMg_(2)X_(2)(X=P,As,Sb,Bi)zintl compounds by first-principles method

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Journal of Rare Earths 2024年第1期42卷 147-154,I0006页

作者： Sajid Khan Dil Faraz Khan R.Neffati Tariq Usman Muhammad Waqar Ahsraf Shamim Khan Saeed Ullah Jan G.murtaza Department of Physics University of Science&Technology BannuBannu28100Pakistan Department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Laboratoire de Physique de La Matiere Condensee Departement de PhysiqueFaculte des Sciences de TunisUniversite Tunis El ManarCampus Universitaire1060TunisTunisia Department of Physics Shaoxing UniversityShaoxing312000China Department of Mathematics&Natural Sciences Prince Mohammad Bin Fahd UniversityAlkhobar31952Saudi Arabia Materials Modeling Lab Department of PhysicsIslamia College Peshawar25120KhyberPakhtunkhwaPakistan

In this work the structural,electronic and thermoelectric properties of YbMg_(2)X_(2)(X=P,As,Sb,Bi)zintl compounds were investigated comprehensively using first principles *** electronic properties were studied using PBE GGA,TB-mBJ and hybrid(YS-PBE0)*** the structural parameters of optimized structures are in harmonious agreement to the available *** band structure study illustrates that the titled materials manifest metallic and semi metallic nature using PBE and TB-mBJ potentials while they show wide band gap semiconducting behavior by following hybrid(YS-PBE0)*** density of states(TDOS)and partial density of states(PDOS)were also calculated to glimpse the contribution of orbitals of atoms in the formation of *** properties were studied by using BoltzTraP2 code employed to *** get enormous values of Seebeck coefficient(S),power factor(PF)and thermoelectric figure of merit(ZT)for all the samples YbMg_(2)X_(2)(X=P,As,Sb,Bi),Moreover,the overwhelming transport properties for the titled compounds indicate the optimum level of carriers’concentration which pinpoints these materials to be better thermoelectrics in the 1-2-2 zintl family.

关键词： Zintl compounds Hybrid functional Band structure Thermoelectrics Rare earths

Role of high-density brines in reservoir development stages:A review

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Energy Geoscience

Energy Geoscience 2024年第3期5卷 13-23页

作者： Arshad Raza Mohamed Mahmoud Saad Alafnan Muhammad Arif Farzain Ud Din Kirmani Muhammad Shahzad Kamal Mobeen murtaza Azeem Rana College of Petroleum Engineering and Geosciences(CPG) Petroleum Engineering DepartmentKing Fahd University of Petroleum&Minerals(KFUPM)DhahranSaudi Arabia Petroleum Engineering Department Khalifa UniversityAbu Dhabi127788United Arab Emirates Department of Petroleum and Gas Engineering N.F.C.Institute of Engineering&TechnologyMultanPakistan Center for Integrative Petroleum Research King Fahd University of Petroleum&Minerals31261DhahranSaudi Arabia Department of Chemistry University of Management and TechnologyLahorePakistan

High-density brines have been recognized beneficial for oilfield applications,with various key areas such as drilling,completion and formation ***-density brines can play a critical role in the development and production of oil and gas reservoirs during the primary,secondary,and tertiary recovery ***-density brines can enhance the mobility and recovery of the oil in the reservoir by controlling the density and ***,a less attention has been given to the application of high-density brine in the area of reservoir *** review is shedding light on a concise overview of reservoir development stages in association with the recovery *** addition,most possible applications of high-density fluids have also been reviewed in the field of the reservoir *** summary,this review state that high-density brines can be used to stimulate reservoirs by hydraulic fracturing during the primary recovery ***,the risk of increased interfacial tension,which relies on the density difference of two fluids,can trap more residual oil relative to conventional water *** addition,high-density brines are effective in decreasing the mobility ratio and facilitating favorable displacement during polymer ***,they can be least effective in alkaline flooding due to the high IFT related to large density ***,it is suggested to consider the utilization of sustainable high-density brines by taking into account effective factors in petroleum engineering aspects such as stimulation,secondary recovery and polymer flooding.

关键词： Reservoir development Brine High density Environment Sustainability

Cardioembolic Stroke as a Sequela of General Ventricular Hypokinesia Secondary to Acute Myocarditis in a 16-Year-Old Male

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Open Journal of Emergency Medicine 2024年第3期12卷 85-94页

作者： Abdul Khattan Rehman Renaldo Pavrey Nazir Juvale murtaza Bagwala Department of Emergency Medicine Saifee Hospital Mumbai India Department of Emergency Medicine Nanavati Max Super Specialty Hospital Mumbai India Department of Cardiology Saifee Hospital Mumbai India

Paediatric cardiac disease is an established cause of ischemic stroke in the neonatal and infantile groups. These diseases may be congenital or acquired. However, clinical myocarditis is in itself, relatively uncommon in older children. The most common pathogen is Coxsackie virus B. The offending agent instigates an immune response, which causes myocardial oedema with eventual systolic and diastolic dysfunction. Cardioembolic stroke can occur secondary to an intra-mural thrombus in a dysfunctional atrium or ventricle. We describe the case of an adolescent male with acute myocarditis complicated by a thromboembolic stroke. After initial management of acute pulmonary oedema and heart failure with restricted ejection fraction (HFrEF), the child developed seizure-like symptoms on the 10th day of hospitalization, prompting urgent neuro-radio diagnosis, which revealed acute infarcts in the cerebellum and frontal lobe of the cerebrum. We believe this case to be of clinical relevance because;1) The diagnosis of an acute stroke in children is often delayed due to the atypical clinical presentation and often the absence of traditional stroke-like symptoms, and 2) There is a lack of sufficient high-quality evidence regarding the predictors and the immediate management of stroke in paediatric heart disease, as well as inadequate data on prevalence and incidence in paediatric cardioembolic strokes.

关键词： Paediatric Ischemic Stroke Adolescent Myocarditis Ventricular Hypokinesia Cardioembolic

Effect of kappa distribution on the damping rate of the obliquely propagating magnetosonic mode

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Plasma Science and Technology 2018年第3期20卷 43-48页

作者： imran Ali KHAN G murtaza Department of Physics G. C. University Lahore Katchery Road 54000 Lahore Pakistan

Data from spacecrafts suggest that space plasma has an abundance of suprathermal particles which are controlled by the spectral index κ when modeled on kappa particle velocity distribution. In this paper, considering homogeneous plasma, the effect of integer values of κ on the damping rate of an obliquely propagating magnetosonic（MS） wave is studied. The frequency of the MS wave is assumed to be less than ion cyclotron frequency, i.e.,iw（28）w. Under this assumption, the dispersion relation is investigated both numerically and analytically, and it is found that the real frequency of the wave is not a sensitive function of κ, but the imaginary part of the frequency is. It is also shown that for those values of κ where a large number of resonant particles participate in wave–particle interaction, the wave is heavily damped, as expected. The possible application of the results to the solar wind is discussed.

关键词： magnetosonic wave suprathermal plasma wave-particle interactions damping of wave

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电化学分析方法在中药质量控制中的研究进展

分析化学 2024年第1期52卷 22-34页

作者：潘彦冰 Awais IHSAN 施敏马雯雯 Ghulam murtaza 胡克菲李竣黄先菊程寒中南民族大学药学院伊斯兰堡COMSATS大学生物科技学院伊斯兰堡COMSATS大学药学院元莱健康产品(武汉)有限公司国家中医药管理局民族药学三级实验室

中药质量控制是保证中药现代化、产业化以及国际化的核心问题。与其它分析方法相比，电化学分析法具有灵敏度高、检测速度快和成本低等优点，是中药质量控制的重要手段，具有广阔的发展前景。本文综述了近年来电化学方法在中药质量控制... 详细信息

中药质量控制是保证中药现代化、产业化以及国际化的核心问题。与其它分析方法相比，电化学分析法具有灵敏度高、检测速度快和成本低等优点，是中药质量控制的重要手段，具有广阔的发展前景。本文综述了近年来电化学方法在中药质量控制方面的研究进展，介绍了电化学指纹图谱技术在中药鉴别方面的研究概况，着重归纳了电化学技术在分析中药有效成分和有害物质中的应用，包括黄酮类、生物碱类、醌类、苷类、重金属和农药残留等，并展望了电化学方法在中药质量控制领域的发展前景。

关键词：电化学方法指纹图谱中药质量控制评述

来源：博看期刊