Analytical cheeb tsam ntawm daim ntawv thov rau kis electron microscopy
Transmission electron microscopy yog ib hom electron microscope uas tau siv dav. Nws muaj qhov zoo ntawm kev daws teeb meem siab thiab tuaj yeem siv ua ke nrog lwm cov txheej txheem. Nws tau siv dav hauv ntau yam kev tshawb fawb xws li tshuaj thiab biology, thiab tau dhau los ua ib qho ntawm cov cuab yeej tseem ceeb rau histology, pathology, anatomy thiab kev kuaj mob pathology.
Daim ntawv thov thaj chaw ntawm kis tau tus mob electron microscopy:
1. Khoom siv
Lub microstructure ntawm cov khoom siv ua lub luag haujlwm txiav txim siab hauv nws cov khoom siv kho qhov muag, kho qhov muag, hluav taws xob thiab lwm yam khoom siv lub cev thiab tshuaj. Raws li ib qho tseem ceeb ntawm cov khoom siv characterization, kis tau tus mob electron microscopy tsis tau tsuas yog siv diffraction hom los kawm cov qauv ntawm cov muaju, tab sis kuj tau txais high-resolution dluab ntawm qhov chaw tiag tiag nyob rau hauv cov duab hom, uas yog, ncaj qha duab atoms nyob rau hauv cov khoom thiab ncaj qha soj ntsuam. microscopic qauv ntawm cov khoom. qauv.
2. Physics teb
Nyob rau hauv lub teb ntawm physics, electron holography muaj peev xwm ib txhij muab amplitude thiab theem cov ntaub ntawv ntawm electron nthwv dej, ua kis tau tus mob electron microscopy lug siv nyob rau hauv kev tshawb fawb ntawm magnetic teb thiab hluav taws xob teb tis uas muaj feem xyuam rau theem. Tam sim no, kis tau tus mob electron microscopy ua ke nrog electron holography tau siv los ntsuas qhov hluav taws xob teb faib ntawm semiconductor multi-layer nyias zaj duab xis qauv khoom siv thiab cov khoom sib nqus sib nqus hauv cov khoom sib nqus.
3. Chemical teb
Nyob rau hauv lub teb ntawm chemistry, nyob rau hauv-situ kis tau tus mob electron microscopy muab ib tug tseem ceeb txoj kev rau in-situ soj ntsuam cov roj thiab cov kua theem tshuaj tiv thaiv vim nws ultra-siab spatial daws teeb meem. Nyob rau hauv-situ kis tau tus mob electron microscopy yog siv los nkag siab txog cov txheej txheem ntawm cov tshuaj tiv thaiv thiab cov txheej txheem transformation ntawm nanomaterials, thiaj li yuav to taub, tswj thiab tsim cov synthesis ntawm cov ntaub ntawv los ntawm cov xwm ntawm cov tshuaj tiv thaiv. Tam sim no, in-situ electron microscopy thev naus laus zis tau ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov khoom siv hluavtaws, tshuaj catalysis, kev siv hluav taws xob thiab kev ua neej nyob. Kev xa tawm hluav taws xob microscopy tuaj yeem saib ncaj qha rau morphology thiab cov qauv ntawm nanoparticles ntawm kev nthuav dav heev, thiab yog ib txoj hauv kev siv ntau tshaj plaws rau nanomaterials.
4. Biological teb
Hauv kev kawm txog biology, X-ray crystallography technology thiab nuclear magnetic resonance feem ntau yog siv los kawm txog cov qauv ntawm biological macromolecules. Lawv tau tuaj yeem txiav txim siab txoj haujlwm ntawm cov protein nrog qhov tseeb ntawm 0.2nm, tab sis lawv txhua tus muaj kev txwv. X-ray crystallography thev naus laus zis yog ua raws li cov muaju muaj protein ntau thiab feem ntau kawm txog cov qauv hauv av hauv lub xeev ntawm cov molecules, tab sis tsis muaj zog los soj ntsuam cov kev zoo siab thiab kev hloov pauv ntawm cov molecules. Biological macromolecules feem ntau cuam tshuam thiab tsim cov complexes hauv lub cev los ua lawv txoj haujlwm. Lub crystallization ntawm cov complexes yog nyuaj heev. Txawm hais tias NMR tuaj yeem tau txais cov qauv ntawm cov molecules hauv kev daws teeb meem thiab kawm cov kev hloov pauv hloov pauv ntawm cov molecules, nws yog qhov tsim nyog rau kev kawm txog roj ntsha macromolecules nrog cov luj me me.
