简介:<正>“Privacy”istranslatedasyinsiinChinese.Traditionally,intheChinesemind,yinsiisassociatedwithsomethingthatisclosedorunfair.Ifsomeoneissaidtohaveyinsi,meddlers(好事者)willbeattractedtopry(打探)intohisorheraffairs.Sopeoplealwaysstatethattheydon’thaveyinsi.
简介:TheinvestigationonopticalpropertiesofSi1-xGex/Sistrainedlayerstructureshasbeencarriedoutactivelyinrecentyears.Thephotoluminescencehasbe-comeabriskersubjectinthestudiesofitsvariousopticalproperties.Aresearchdevelop-menttophotoluminescencepropertiesofsomenewSi1-xGex/Sistrainedlayerstruc-turesisintroduced.
简介:Theresidualelectricallyactivedefectsin(4×1012cm-2(30KeV)+5×1012cm-2(130KeV))si-implantedLECundopedsi-GaAsactivatedbytwo-steprapidthermalannealing(RTA)LABELEDAS970℃(9S)+750℃(12S)havebeeninvestigatedwithdeepleveltransientspec-troscopy(DLTS).TwoelectrontrapsET1(Ec-0.53eV,σn=2.3×10-16cm2)andET2(Ec-0.81eV,σn=9.7×10(-13)cm2)aredetected.Furthermore,thenoticeablevariationsoftrap’scon-centrationandenergylevelintheforbiddengapwiththedepthprofileofdefectsinducedbyionim-plantationandRTAprocesshavealsobeenobserved.The[Asi·VAs·AsGa]and[VAs·Asi·VGa·AsGa]areproposedtobethepossibleatomicconfigurationsofET1andET2,respectivelytoexplaintheirRTAbehaviors.
简介:PhotoconductivityCharacteristicsofPorousSi①CHAOZhanyun,WANGKaiyuan(DepartmentofElectronicEnginering,SoutheastUniversity,Nanji...
简介:PitformationandsurfacemorphologicalevolutioninSi(001)homoepitaxyareinvestigatedbyusingscanningtunnelingmicroscopy.Anti-phaseboundaryisfoundtogiverisetoinitialgenerationofpitsboundbybunchedDBsteps.Theterracesbreakupandarereducedtoacriticalnucleussizewithpitformation.Duetoanisotropickinetics,adownhillbiasdiffusioncurrent,whichislargeralongthedimerrowsthroughthecentreareaoftheterracethanthroughtheareaclosetotheedge,leadstotheprevalenceofpitsboundby{101}facets.Subsequentannealingresultsinashapetransitionfrom{101}-facetedpitstomulti-facetedpits.
简介:研究Al-Mg-Si合金晶界组成相(Al-Mg2Si及Al-Mg2Si-Si)间的电化学行为和动态电化学耦合行为,提出Al-Mg-Si合金的晶间腐蚀机理。研究表明,晶界Si的电位比其边缘Al基体的正,在整个腐蚀过程中作为阴极导致其边缘Al基体的阳极溶解;晶界Mg2Si的电位比其边缘Al基体的负,在腐蚀初期作为阳极发生阳极溶解,然而由于Mg2Si中活性较高的元素Mg的优先溶解,不活泼元素Si的富集,致使Mg2Si电位正移,甚至与其边缘Al基体发生极性转换,导致其边缘Al基体的阳极溶解。当n(Mg)/n(Si)〈1.73时,随着腐蚀的进行,合金晶界同时会有Mg2Si析出相和Si粒子,腐蚀首先萌生于Mg2Si相和Si边缘的无沉淀带,而后,Si粒子一方面导致其边缘无沉淀带严重的阳极溶解,另一方面加速Mg2Si和晶界无沉淀带的极性转换,从而促使腐蚀沿晶界Si粒子及Mg2Si粒子边缘向无沉淀带发展。
简介:Aconductionchannelmodelispropsedtoexplainthehighconductivitypropertyofnc-Si:H.Detailedenergybanddiagramisdevelopedbasedontheanalysisandcalculation,andtheconductivityofthenc-Si:Hwasthenanalysedonthebasisofenergybandtheory.Itisassumedthattheconductivityofthenc-Si:Hstemsfromtwoparts:theconductanceoftheinterface,wherethetransportmechanismisidentifiedasathermal-assistedtunnelingprocess,andtheconductancealongthechannelaroundthegrain,whichmainlydeterminedthehighconductivityofthenc-Si:H.Theconductivityofnc-Si:Hiscalculatedandcomparedwiththeexperimentdata.Thetheoryisinagreementwiththeexperiment.
简介:EffectofCe-Mg-Si(lightRE)andY-Mg-Si(heavyRE)nodulizersonthemicrostructuresandmechanicalpropertiesofheavysectionductileironwasinvestigatedtodevelopthematerialofspent-nuclear-fuelcontainers.Twoas-castsweretreatedbythesamequalitypercentageoflightREandheavyRE,respectively.Fourpositionswerechosentostandfordifferentsolidificationcoolingratesofspecimens.Thetensilestrength,elongationandimpacttoughnessofspecimenstreatedbyheavyREwereallhigherthanthoseofthespecimenstreatedbylightRE.Withthedecreaseofcoolingrate,themechanicalpropertiesoftwospecimensdecreased,andthefracturemorphologychangedfromductilefracturetobrittlefracture.TheimprovingeffectofmechanicalpropertiesbetweenheavyREandlightREwasobviousduetothebetteranti-degradationpropertyofheavyRE.Whilethesolidificationprocesslastedformorethan250min,theimprovingeffectwasnotobviousduetoseriousspheroidalizationdecaying.
简介:水晶的Au5Si2/Si异质接面nanowires(Au5Si2/SiNWs)被热蒸发的SiO粉末在一个低真空系统在厚黄金涂的硅底层上获得。生产Au5Si2/Si异质接面的结构分析被采用一台传播电子显微镜(TEM)和一个选择区域执行电的衍射计。化学作文被纳入TEM的一个精力散的X光分光镜学习。一个二拍子的圆舞生长模型被建议描述Au5Si2/SiNWs的形成。在第一步期间,水晶的SiNWs经由在相对高的温度把帮助氧化物的生长过程与vapour-liquid-solid模型相结合的生长机制被形成。在第二步,preformedSiNWs的温度减少和减少片断与残余Au反应由一个solid-liquid-solid过程形成单个水晶的Au5Si2nanowires。现在的工作应该基于nanowires为未来合成和高质量的金silicidenanowires和微电子设备的研究是有用的。
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简介:ForthecomingsuperheavytestexperimentatRIBLL,wedevelopedaSi-arrayderector(showninFig.1)andhavetesteditwitha3-componentαsource.Thisdetectorconsistsofoneposition-sensitiveSi-detector(PSD),fourlarge-areaSiphoto-diodedetectors(SPD)andeightsmall-areaSiphoto-diodedetectors,theirsensitive