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Hierarchically Structured Graphene Foam and its Potential as a Large-scale Strain-gauge Sensor  
Hierarchically Structured Graphene Foam and its Potential as a Large-scale Strain-gauge Sensor
資料類型: PDF文件
關鍵詞: Reduced  graphene  Mechanical  properties  Strain-gauge  sensor  
資料大?。?/td> 71K
所屬學科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(2013.6.2-6 武漢)
簡介:
Ahierarchicallystructuredthermal-reducedgraphene(ReG)foamwith0.5S/cmelectricalconductivityisfabricatedfromawell-dispersedgrapheneoxidesuspensionviaadirectionalfreezingmethodfollowedbyhigh-temperaturethermaltreatment.Theas-preparedthree-dimensionalReGfoamhasanorderedmacroporoushoneycomb-likestructurewithstraightandparallelvoidsintherangeof30ymt075ymseparatedbycellwallsseveraltensofnanometersthick.Despiteitsultra-lowdensity,theReGfoamhasanexcellentcompressionrecoveryalongitsin-planedirection.ThispropertyoftheReGfoamcanbeattributedtoitshierarchicallyporousstructures,asdemonstratedbythecompressiontest.TheexcellentcompressionrecoveryandhighconductivityprovidetheReGfoamwithexceptionalpiezoresistivecapabilities.TheelectricalresistanceoftheReGfoamshowsalineardecreasingtrendwithcompressivestrainincrementsofupt060%,whichcannotbeobservedinconventionalrigidmaterial-basedsensorsandcarbonnanotube-basedpolymersensors.Suchintriguinglinearstrain-responsivebehavior,alongwiththefastresponsetimeandhighthermalstability,makestheReGfoamapromisingcandidateforstrainsensing.Wedemonstratedthatitcouldbeusedasawearabledeviceforreal-timemonitoringofhumanhealth.
作者: J.Kuang
上傳時間: 2013-07-01 15:20:46
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