Taw qhia rau cov hauv paus ntsiab lus, qhov zoo, thiab kev siv thaj chaw ntawm scanning electron microscopy
Scanning electron microscope muaj peev xwm soj ntsuam cov morphology thiab cov qauv ntawm qhov chaw ntawm cov qauv nrog cov kev daws teeb meem siab heev, uas yog ib qho ntawm cov cuab yeej muaj zog rau kev tshawb fawb ntawm cov ntaub ntawv ntsig txog cov neeg ua haujlwm thiab cov kws tshawb fawb. Nws daim ntawv thov muaj dav heev uas nws tuaj yeem txuas ntxiv mus rau kev lom neeg, kev kho mob thiab kev lag luam. Nyob rau hauv tsab xov xwm no, lub hauv paus ntsiab lus, yam ntxwv, qhov zoo thiab kev faib tawm ntawm scanning electron microscope yuav qhia tau meej, yog li koj tuaj yeem nkag siab zoo dua rau scanning electron microscope.
Txoj Cai Ua Haujlwm ntawm Scanning Electron Microscope
Scanning electron microscopes yog raws li cov khoom ntawm electrons. Lawv siv lub teeb tsom teeb pom kev zoo es tsis txhob pom lub teeb pom kev nyob hauv ib txwm siv kho qhov muag microscopes. Lawv siv cov kab hluav taws xob ceev ceev los cuam tshuam nrog cov khoom siv hluav taws xob ntawm cov qauv, ua rau cov hluav taws xob emissions. Cov emitted thib ob electrons yog kuaj los ntawm ib tug detector. Nws tau txais thiab hloov dua siab tshiab rau hauv kev daws teeb meem siab dua thiab cov duab ntxaws dua.
Lub tshuab ntsuas hluav taws xob hauv tshuab hluav taws xob feem ntau muaj cov phom hluav taws xob, lub tshuab tsom, lub tshuab luam ntawv, cov qauv theem thiab lub ntsuas. Cov phom hluav taws xob tsim hluav taws xob hluav taws xob uas yog tom qab ntawd tsom mus rau thaj chaw me me los ntawm kev tsom mus rau qhov system. Tswj los ntawm scanning kauj, nws cuam tshuam nrog cov atoms thiab molecules hauv cov qauv thaum nws cheb hla cov qauv saum npoo, tsim cov teeb liab. Cov teeb liab no raug ntes los ntawm tus ntes thiab tom qab ntawd ua tiav los ntawm lub teeb liab processor thiab thaum kawg hloov mus rau hauv cov duab zoo.
Nta thiab qhov zoo ntawm scanning electron microscope
1. Kev daws teeb meem siab: Cov tshuab ntsuas hluav taws xob siv hluav taws xob muaj qhov kev daws teeb meem siab heev thiab tuaj yeem soj ntsuam ntau cov ntsiab lus xws li cov qauv thiab qhov chaw morphology ntawm cov qauv me me. Qhov tseeb scanning electron microscope thib ob electron imaging daws teeb meem tau mus txog 3 ~ 4nm.
2. High magnification: scanning electron microscopes muaj peev xwm ntawm kev soj ntsuam siab. Magnification tuaj yeem nyob ntawm ob peb zaug hauv qhov chaw mus txog 200, 000 zaug, tso cai rau cov qauv tsim kom pom meej.
3. Kev soj ntsuam tsis sib cuag: Tsis zoo li kev sib kis ntawm electron microscopes, scanning electron microscopes siv kev soj ntsuam tsis sib cuag, uas tsis ua rau cov duab thiab cov qauv ntawm cov qauv puas.
4. Ntau qhov tob: Kev Tshawb Fawb Electron Microscope tuaj yeem tshawb xyuas thiab txheeb xyuas ntawm qhov sib txawv ntawm qhov tob, ua rau peb tuaj yeem soj ntsuam cov qauv sab hauv ntawm cov qauv uas tsis tuaj yeem pom los ntawm cov kab ke ib txwm muaj. Nws tuaj yeem siv rau kev soj ntsuam ncaj qha thiab kev tsom xam microfracture. Yog li ntawd, feem ntau ntawm kev tsom xam microfracture yog tam sim no ua tiav siv cov tshuab electron microscopy.
5. Kev tsim kho peb-dimensional: Los ntawm kev tau txais cov duab ntawm cov qauv ntawm txhua lub kaum ntse ntse, lub tshuab ntsuas hluav taws xob tuaj yeem nqa peb-dimensional reconstruction kom muab cov ntaub ntawv ntau dua.
6. Digital processing: Kev ua digital thiab kev tsom xam ntawm cov duab thaij duab hluav taws xob lub tshuab ntsuas hluav taws xob txhim kho qhov tseeb thiab kev ntseeg siab ntawm kev soj ntsuam thiab kev soj ntsuam. Nws tuaj yeem siv ua ke nrog lub zog spectrometers, charge-coupled devices (CCDs), thiab lwm yam. Txhawm rau ua cov tshuaj lom neeg muaj pes tsawg leeg, tshuaj xyuas lub zog spectrum thiab lwm yam.
Scanning electron microscope daim ntawv thov thaj chaw
1. Cov ntaub ntawv tshawb fawb: Lub tshuab ntsuas hluav taws xob siv hluav taws xob tuaj yeem pab cov kws tshawb fawb soj ntsuam lub microstructure ntawm cov ntaub ntawv thiab tshuaj xyuas lawv cov muaj pes tsawg leeg thiab qhov chaw morphology. Qhov no tseem ceeb heev rau kev tshawb fawb thiab kev tsim cov khoom tshiab, txhim kho cov khoom siv thiab kev tswj kom zoo.
2. Kev Tshawb Fawb Txog Kev Ua Neej: SEM kuj tau siv dav hauv biology thiab tuaj yeem pab kawm cov qauv ntawm cov hlwb thiab cov ntaub so ntswg, morphology thiab ecology ntawm cov kab mob thiab lwm yam.
3. Nanotechnology: Lub siab daws teeb meem thiab rhiab heev ntawm scanning electron microscope ua rau nws yog ib qho tseem ceeb rau kev tshawb fawb ntawm nanotechnology. Los ntawm SEM, cov kws tshawb fawb tuaj yeem soj ntsuam cov qauv thiab morphology ntawm cov tshuaj nanoscale, thiab kho thiab txhim kho cov khoom ntawm nanomaterials.
4. Lub zog hluav taws xob: Lub tshuab ntsuas hluav taws xob siv hluav taws xob tau siv dav hauv kev tshawb fawb ntawm lub zog xws li lub hnub ci, roj hlwb, cov khoom siv hluav taws xob thiab lwm yam. Nws pab cov kws tshawb fawb los soj ntsuam qhov tsis xws luag lossis inhomogeneities hauv microstructure thiab optimize cov khoom siv.
