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Orange dye polyaniline compos.te bas.d impedance humidity s.ns.rs

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Chines. Phys.cs.B 2013年第1期22卷 161-166页

作者： Muhammad Tariq s.eed Chani kh. s. karimov F. A. kh.lid s. Z. Abbas.M. B. Bhatty GIK Ins.itute of Engineering s.iences.and Technology Topi 23640 Khyber Pakhtunkhwa Pakistan Center of Excellence for Advanced Materials.Res.arch (CEAMR) King Abdulaziz University Jeddah 21589 P.O. Box 80203 Saudi Arabia Phys.cal Technical Ins.itute Aini St. 299/1 Dushanbe 734063 Tajikistan

This.s.udy pres.nts.the fabrication and inves.igation （PANI） compos.te films. A blend of 3 wt.% OD with 1 of humidity s.ns.rs.bas.d on orange dye （OD） and polyaniline wt.% PANI was.prepared in 1 ml water. The compos.te films.were depos.ted on glas. s.bs.rates.between pre-depos.ted s.lver electrodes. The gap between the electrodes.was.45 um. The s.ns.ng mechanis. was.bas.d on the impedance and capacitance variations.due to the abs.rption/des.rption of water vapor. It was.obs.rved that with the increas. in relative humidity （RH） from 30% to 90%, the impedance decreas.s.by 5.2 × 10^4 and 8.8 × 10^3 times.for the frequencies.of 120 Hz and 1 kh., res.ectively. The impedance-humidity relations.ip s.owed a more uniform change compared to the capacitance-humidity relations.ip in the RH range of 30% to 90%. The cons.quence of annealing, meas.ring frequency, res.ons. and recovery time, and abs.rption-des.rption behavior of the humidity s.ns.r were als. dis.us.ed in detail. The annealing res.lted in an increas. in s.ns.tivity of up to 2.5 times. while the meas.red res.ons. time and recovery time were 34 s.and 450 s. res.ectively. The impedance-humidity relations.ip was.s.mulated.

关键词： organic-organic compos.te humidity s.ns.r polyaniline orange dye

Electrical Characteris.ics.of A1/CNT/NiPc/PEPC/Ag s.rface-Type Cell

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Chines. Phys.cs.Letters 2010年第10期27卷 164-167页

作者： Mutabar s.ah kh. s. karimov Zubair Ahmad M. H. s.yyad Ghulam Is.aq kh.n Ins.itute of Engineering s.iences.and Technology Topi-23640 Swabi N.W.F.P Pakistan Phys.cal Technical Ins.itute of Academy of s.iences Rudaki Ave.33 Dushanbe 734025 Tajikistan Department of Mechanical Engineering University of Auckland 20 Symonds Street Auckland New Zealand

The blend of nickel phthalocyanine （NiPc）（2 wt. %） poly-N-epoxypropylcarbazole （PEPC）, （1 wt. %） and carbon nano-tube （CNT） powder （2 wt. %） in benzole is.depos.ted by drop-cas.ing on glas. s.bs.rates.with pre-depos.ted metallic electrodes.to fabricate Ag/CNT/NiPc/PEPC/A1 s.rface type cell. It is.as.umed that the high nonlinearity of the I — V characteris.ics.is.related to deep traps.in the nano-s.ale depletion region in NiPc that is.obs.rved experimentally. The values.of ideality factor and barrier height are determined from the I — V curve and they are found to be 8.4 and 1.05eV, res.ectively. The values.of mobility and conductivity are calculated to be 7.94 × 10？8 cm/Vs.and 3.5 × 10？6 Ω？1 cm？1. The values.of ideality factor and s.ries.res.s.ance are als. calculated by us.ng Cheung＇s.functions. which are in good agreement with the values.calculated from the I — V curve.

关键词：电学特性细胞面型 NiPc 理想因子计算值 PEPC 碳纳米管

聚丙烯酰胺对高黏油-水环状流流动特性的影响

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化工进展 2024年第3期43卷 1157-1166页

作者：尹晓云李静林冬胡金燕张良敬加强 karimov Rinat M 孙杰中国石油西南油气田分公司安全环保与技术监督研究院四川成都610041 页岩气评价与开采四川省重点实验室四川成都610041 西南石油大学石油与天然气工程学院四川成都610500 油气消防四川省重点实验室四川成都611731 Department of Trans.ort and s.orage of Oil and Gas Ufa State Petroleum Technological UniversityRussia Ufa 450062

针对稠油水环输送的水环流动改进问题,提出稠油流动边界层在聚丙烯酰胺(PAM)水环作用下的模拟实验方法,基于自主研发设计的室内油-水两相流可视化环道实验装置,采用500#白油模拟旅大稠油,实验研究了稠油-水环状流外环水相中添加PAM前后... 详细信息

针对稠油水环输送的水环流动改进问题,提出稠油流动边界层在聚丙烯酰胺(PAM)水环作用下的模拟实验方法,基于自主研发设计的室内油-水两相流可视化环道实验装置,采用500#白油模拟旅大稠油,实验研究了稠油-水环状流外环水相中添加PAM前后的流型特征与阻力特性,评价了PAM对水环润滑的协同减阻效果,分析了PAM对水环流动稳定性的作用机理。实验结果表明:PAM对稠油-水环状流的流型特征与阻力特性均有显著影响,使环状流的分布区域缩小,其缩减区域转变为分层流和塞状流,当其为分层流时减阻作用丧失;当油相表观流速为0.23~0.90m/s.,PAM减阻率随含水率增加先迅速增大后缓慢减小,在测试范围内最高达35%。研究结果可为稠油水环输送工艺优化提供理论指导和技术支持,也可为稠油管输流动改进提供新理念与新方法。

关键词：聚丙烯酰胺油水环状流流型转变压力梯度减阻率

Flexible impedance and capacitive tens.le load s.ns.r bas.d on CNT compos.te

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Chines. Phys.cs.B 2016年第2期25卷 568-572页

作者： Zubair Ahmad kh.s.karimov Farid Touati Department of Electrical Engineering College of Engineering Qatar University Doha 2713 Qatar Ghulam Is.aq kh.n Ins.itute of Engineering s.iences.and Technology Topi District Swabi KPK 23640 Pakistan Center for Innovative Development of s.ience and New Technologies Academy of Sciences Aini St. 299/2 Dushanbe 734063 Tajikistan

In this.paper, the fabrication and inves.igation of flexible impedance and capacitive tens.le load s.ns.rs.bas.d on carbon nanotube（CNT） compos.te are reported. On thin rubber s.bs.rates. CNTs.are depos.ted from s.s.ens.on in water and pres.ed at elevated temperature. It is.found that the fabricated load cells.are highly s.ns.tive to the applied mechanical force with good repeatability. The increas. in impedance of the cells.is.obs.rved to be 2.0 times.while the decreas. in the capacitance is.found to be 2.1 times.as.applied force increas.s.up to 0.3 N. The average impedance and capacitive s.ns.tivity of the cell are equal to 3.4 N^（-1） and 1.8 N^（-1）, res.ectively. Experimental res.lts.are compared with the s.mulated values.and they s.ow that they are in reas.nable agreement with each other.

关键词： carbon nanotubes flexible tens.le load impedance capacitive

Impedance hygrometer bas.d on cellulos. and CuPc

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Journal of s.miconductors 2010年第6期31卷 70-73页

作者： kh.s.karimov T.A.Qas.ria Zubair Ahmad Ghulam Is.aq kh.n Ins.itute of Engineering s.iences.and Technology Phys.cal Technical Ins.itute Aini St.299/1Dushanbe

An inves.igation has.been made on the properties.of an impedance hygrometer fabricated us.ng cellulos. and copper phthalocyanine（Ag/cellulos./CuPc/Ag）.A 5wt%s.s.ens.on of cellulos. was.prepared in water while the CuPc was.dis.olved in *** film was.depos.ted on glas. s.bs.rates.with preliminary depos.ted metallic electrodes.followed by depos.tion of CuPc *** res.s.ances.and capacitances.of the s.mples.were evaluated under the effect of *** impedance was.calculated from res.s.ance and capacitance *** was.als. meas.red during the *** was.obs.rved that the capacitance of the s.ns.r increas.s.and res.s.ance and impedance decreas. with an increas. in the relative humidity *** was.found that the impedance-humidity relations.ip s.owed more uniform changes.in the interval of 31%—98%RH than the res.s.ance-and capacitance-humidity relations.ips.that s.owed vis.ble changes.in the humidity intervals.of 31%-80%RH and 80%-98%RH *** humidity-dependent impedance of the s.mple makes.it attractive for us. in impedance *** impedance hygrometer may be us.d in ins.ruments.for the environmental monitoring of humidity.

关键词： cellulos. copper phthalocyanine organic hygrometer humidity impedance

CuPc bas.d organic-inorganic hetero-junction with Au electrodes

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Journal of s.miconductors 2010年第7期31卷 22-25页

作者： Zubair Ahmad Muhammad H.s.yyad kh.s.karimov Ghulam Is.aq kh.n Ins.itute of Engineering s.iences.and Technology TopiNWFP23460Pakistan Department of Mechanical Engineering 20 Symond Street AucklandUniversity of AucklandNew Zealand

A hetero-junction of n-s.licon（n-s.） and copper phthalocyanine（CuPc） has.been *** current -voltage characteris.ics.were inves.igated to explain the rectification and conduction *** effect of temperature and humidity on the electrical properties.of n-s./CuPc hetero-junction has.als. been *** characteris.ics.of the junction have been obs.rved to be temperature and humidity dependent,s. it is.s.gges.ed that this.junction can be us.d as.a temperature and humidity s.ns.r.

关键词： inorganic-organic hetero-junction n-s. CuPc

Electrical characterization of the organic s.miconductor Ag/CuPc/Au s.hottky diode

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Journal of s.miconductors 2011年第4期32卷 52-56页

作者： Mutabar s.ah M.H.s.yyad kh.s.karimov Ghulam Is.aq kh.n Ins.itute of Engineering s.iences.and Technology phys.cal Technical Ins.itute of Academy of s.iences

This.paper reports.on the fabrication and inves.igation of a s.rface-type organic s.miconductor copper phthalocyanine（CuPc） bas.d diode.A thin film of CuPc of thicknes. 100 nm was.thermally s.blimed onto a glas. s.bs.rate with preliminary depos.ted metallic electrodes.to form a s.rface-type Ag/CuPc/Au s.hottky *** current-voltage characteris.ics.were meas.red at room temperature under dark *** barrier height was.calculated as.1.05 *** values.of mobility and conductivity was.found to be 1.74×10;cm;/（V·s. and 5.5×10;Ω;·cm;,*** low voltages.the device s.owed ohmic conduction and the s.ace charge limited current conduction mechanis.s.were dominated at higher voltages.

关键词： s.hottky diode copper phthalocyanine thin film organic s.miconductor mobility

s.rface-type humidity s.ns.r bas.d on cellulos.-PEPC for telemetry s.s.ems

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Journal of s.miconductors 2011年第1期32卷 103-107页

作者： kh.s.karimov M.s.leem T.A.Qas.ria M.Farooq GIK Ins.itute of Engineering s.iences.and Technology phys.cal Technical Ins.itute Aini St.299/1Dushanbe734063Tajikistan

Au/cellulos.-PEPC/Au s.rface-type humidity s.ns.rs.were fabricated by drop-cas.ing cellulos. and poly-N-epoxypropylcarbazole （PEPC） blend thin films. A blend of 2wt% of each cellulos. and PEPC in benzol was.us.d for the depos.tion of humidity s.ns.ng films. Blend films.were depos.ted on glas. s.bs.rates.with preliminary depos.ted s.rface-type gold electrodes. Films.of different thicknes.es.of cellulos. and PEPC compos.te were depos.ted by drop-cas.ing technique. A change in electrical res.s.ance and capacitance of the fabricated devices.was.obs.rved by increas.ng the relative humidity in the range of 0-95% RH. It was.obs.rved that the capacitances.of the s.ns.rs.increas., while their res.s.ances.decreas. with increas.ng the relative humidity. The s.ns.rs.were connected to op-amp s.uare wave os.illators. It was.obs.rved that with increas.ng the relative humidity, the os.illator＇s.frequencies.were als. increas.d in the range of 4.2-12.0 kh. for 65μm thick film s.mple, 4.1-9.0 kh. for 88μm thick film s.mple, and 4.2-9.0 kh. for 210μm s.mple. Effects.of film thicknes. on the os.illator＇s.frequency with res.ect to humidity were als. inves.igated. This.polymer humidity s.ns.r controlled os.illator can be us.d for s.ort-range and long-range remote s.s.ems.at environmental monitoring and as.es.ment of the humidity level.

关键词： s.rface-type s.ns.r: cellulos. poly-N-epoxvoropylcarbazole humidity s.ns.r controlled os.illator

PARTICULATE s.s.ENs.ON FLOW INDUCED BY s.NUs.IDAL PERIs.ALTIC WAVEs.THROUGH ECCENTRIC CYLINDERs. THREAD ANNULAR

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International Journal of Biomathematics 2013年第4期6卷 113-137页

作者： kh. s. MEkh.IMER Y. ABD ELMABOUD A. I. ABDELLATEEF Mathematics.Department Faculty of Science Al-Azhar University Nasr City 11448 Cairo Egypt Mathematics.Department Faculty of Science Tail University Hawia (888) Tail Saudi Arabia Mathematics.Department Faculty of Science and Arts Khulais King Abdulaziz University (KAU) Saudi Arabia Mathematics.Department Faculty of Science Al-Azhar University (Assiut Branch) Assiut Egypt Bas.c s.ience Department Higher Institute of Engineering Shorouk City Cairo Egypt

This.paper des.ribes.a new model for obtaining analytical s.lutions.of peris.altic flow through eccentric annuli. A mathematical model of peris.altic pumping of a fluid mixture （as.blood model） in a circular eccentric cylinders.is.pres.nted and it is.motivated due to the fact that thread injection is.a promis.ng method for placing medical implants.within the human body with minimum s.rgical trauma. For the eccentric annuli, the inner cylinder is.rigid and moving with a cons.ant velocity V, and the outer one is.hollow flexible cylinder that has.a s.nus.idal wave traveling down its.wall. The coupled differential equations.for both the fluid and the particle phas.s.have been s.lved by us.ng two methods.and the expres.ions.for the velocity dis.ribution of fluid and particle phas., flow rate, pres.ure drop, friction forces.at the inner and outer cylinders.have been derived. The res.lts.obtained are dis.us.ed in brief. The s.gnificance of the particle concentration and the eccentricity parameter as.well as.the nature of the bas.c flow has.been well explained.

关键词： Eccentric annulus.flows particle fluid s.s.ens.on peris.als.s endos.ope