Lub tshuab ntsuas hluav taws xob puas tuaj yeem pom cov qauv hauv lub atom?
Electron microscopes tsis tuaj yeem pom cov qauv sab hauv ntawm atoms. Atoms tsim cov ntsiab lus ntawm cov tshuaj lom neeg thiab yog cov khoom me tshaj plaws hauv kev hloov tshuaj, uas yog, cov khoom uas tsis tuaj yeem faib los ntawm kev hloov tshuaj lom neeg. Electron microscopes tuaj yeem soj ntsuam cov atoms, tab sis nws yog qhov nyuaj heev los saib xyuas cov qauv sab hauv ntawm atoms (nuclei thiab electron clouds).
Electron lo ntsiab muag yog siv los tsom electrons thiab yog ib feem tseem ceeb tshaj plaws ntawm electron microscope raj. Feem ntau, siv lub lens hlau nplaum, thiab qee zaum siv lub lens electrostatic. Nws siv qhov chaw hluav taws xob lossis qhov chaw sib nqus sib nqus rau lub axis ntawm lub lens chim kom khoov lub electron trajectory ntawm axis los ua kom pom tseeb. Nws ua zoo li lub lens kho qhov muag (convex lens) nyob rau hauv lub tshuab kho qhov muag thiab siv los tsom rau lub teeb ci.
Hom thiab kev siv ntawm electron microscopes:
Electron microscopes tuaj yeem muab faib ua kis tau tus mob electron microscopes, scanning electron microscopes, reflection electron microscopes thiab emission electron microscopes raws li lawv cov qauv thiab siv.
Kev xa hluav taws xob microscopy feem ntau yog siv los soj ntsuam cov khoom siv zoo uas tsis tuaj yeem daws tau los ntawm cov tshuab microscopes; scanning electron microscopy feem ntau yog siv los saib xyuas qhov chaw morphology ntawm cov khib nyiab, thiab tseem tuaj yeem siv ua ke nrog X-ray diffractometers lossis electron zog spectrometers. Cov ntaub ntawv electron sojntsuam rau kev tsom xam cov khoom muaj pes tsawg leeg; Emission Electron Microscopy yog siv los kawm txog tus kheej-emitting electron nto.
