Cov yam ntxwv tseem ceeb ntawm kis tau tus mob electron microscopy piv rau cov txheej txheem teeb pom kev zoo
1, lub hauv paus ntsiab lus ntawm kev ua hauj lwm yog txawv, ib qho yog optical txoj cai, ib qho yog hluav taws xob txoj cai.
2, sib txawv kev daws teeb meem, kis tau tus mob electron microscope zoo heev txhim kho kev daws teeb meem.
3, cov qauv duab sib txawv, ib qho yog reflected lub teeb (tseem yog ib feem me me ntawm lub teeb kis tau tus mob), cov duab xa mus.
4, instrumentation, nqi, txij nkawm yog txawv.
5, kis tau tus mob electron, koj tuaj yeem pom nyob rau hauv optical microscope tsis tuaj yeem pom tsawg dua 0.2um ntawm cov qauv zoo, cov qauv no hu ua sub-microscopic qauv lossis ultrastructure. Txhawm rau pom cov qauv no, nws yog qhov yuav tsum tau xaiv lub teeb lub teeb luv luv los txhim kho qhov kev daws teeb meem ntawm lub tshuab tsom.
6, lub wavelength ntawm lub electron beam yog luv dua li pom lub teeb thiab ultraviolet lub teeb, thiab lub wavelength ntawm electron beam thiab emission ntawm electron beam ntawm lub square root ntawm voltage yog inversely proportional rau lub voltage, uas yog hais tias. , qhov siab dua qhov voltage qhov luv lub wavelength.
Dab tsi yog siv txoj kev xa hluav taws xob hluav taws xob microscopy?
Kev xa tawm electron microscopy muaj ntau yam kev siv hauv cov ntaub ntawv tshawb fawb thiab biology. Txij li cov electrons tau yooj yim tawg los yog nqus los ntawm cov khoom, qhov nkag mus yog qhov tsawg, thiab qhov ntom thiab tuab ntawm cov qauv cuam tshuam rau qhov kev pom zoo kawg nkaus, thiab thinner, ultrathin seem, feem ntau yog 50 txog 100 nm, yuav tsum tau npaj.
Vim qhov luv luv wavelength ntawm electron's de Broglie, kis tau tus mob electron microscope daws teeb meem ntau dua li optical microscope, muaj peev xwm ncav cuag {{0}}.1 ~ 0.2nm, magnification ntawm kaum tawm txhiab mus rau lab lub sij hawm. . Yog li ntawd, kev siv lub tshuab hluav taws xob xa hluav taws xob tuaj yeem siv los soj ntsuam cov qauv zoo ntawm cov qauv, lossis txawm tias cov qauv ntawm ib kab ntawm cov atoms, kaum tawm txhiab zaus me dua li cov qauv me me uas tuaj yeem pom nrog. ib tug optical microscope.
TEM yog ib qho tseem ceeb analytical txoj kev nyob rau hauv ntau yam scientific teb hais txog physics thiab biology, xws li kev tshawb fawb mob cancer, virology, ntaub ntawv science, raws li zoo raws li nanotechnology thiab semiconductor kev tshawb fawb.
