A scanning electron microscope(SEM) yog ib hom electron microscope siv los tshuaj xyuas qhov chaw microbial, uas siv lub zog qis zog txav hluav taws xob los tsom thiab luam theej cov qauv.
Txoj kev loj hlob ntawm electron microscopy tau raug ntaus nqi los ntawm qhov tsis muaj peev xwm ntawm optical microscopy wavelengths. Piv nrog rau lub teeb microscopes, electron microscopes muaj luv luv ntsug wavelengths thiab yog li ua tiav kev daws teeb meem zoo dua.
Cov ntsiab cai ntawm scanning electron microscopy
Tsis zoo li kis tau tus mob electron microscopy, uas siv cov electrons kis tau tus mob, scanning electron microscopy siv emitted electrons.
Scanning electron microscopy ua haujlwm los ntawm kev siv lub zog kinetic los tsim cov cim qhia txog kev cuam tshuam hluav taws xob. Cov khoom siv hluav taws xob no yog cov khoom siv hluav taws xob thib ob, cov khoom siv hluav taws xob rov qab thiab cov hluav taws xob tsis sib xws, uas yog siv los soj ntsuam cov ntsiab lus crystalline thiab photons. Secondary electrons thiab backscattered electrons yog siv los tsim cov duab. Qhov thib ob electrons tawm los ntawm cov qauv ua lub luag haujlwm tseem ceeb hauv kev tshawb nrhiav cov morphology thiab topography ntawm cov qauv, thaum lub backscattered electrons pom qhov sib txawv hauv cov qauv ntawm cov qauv.
