Vim li cas qhov kev daws teeb meem ntawm lub tshuab hluav taws xob tshuab hluav taws xob ntau dua li ntawm lub tshuab ntsuas qhov muag?
Vim tias cov tshuab hluav taws xob siv hluav taws xob siv cov kab hluav taws xob thiab cov khoom siv kho qhov muag siv cov teeb pom kev zoo, thiab cov kab hluav taws xob ntawm cov kab hluav taws xob luv luv dua li cov teeb pom kev zoo, cov tshuab hluav taws xob hluav taws xob muaj kev daws teeb meem ntau dua li optical microscopes.
Qhov kev daws teeb meem ntawm lub tshuab tsom iav yog cuam tshuam nrog lub khob hliav qab lub kaum sab xis thiab lub wavelength ntawm lub teeb hluav taws xob uas dhau los ntawm cov qauv.
Lub wavelength ntawm pom lub teeb yog li 300 mus rau 700 nanometers, thaum lub wavelength ntawm lub electron beam muaj feem xyuam rau lub accelerating voltage. Raws li lub hauv paus ntsiab lus ntawm yoj-particle duality, lub wavelength ntawm high-speed electrons yog luv dua li qhov pom lub teeb, thiab qhov kev daws teeb meem ntawm lub tshuab tsom iav raug txwv los ntawm lub wavelength nws siv, yog li qhov kev daws teeb meem ntawm electron microscopes (0.2 nanometers) yog. ntau dua li ntawm optical microscopes. (200 nm).
Daim ntawv thov ntawm electron microscope technology yog raws li lub hauv paus ntawm optical microscope. Qhov kev daws teeb meem ntawm optical microscope yog {{0}}}.2μm, thiab qhov kev daws teeb meem ntawm kev xa hluav taws xob tshuab hluav taws xob yog 0.2nm. sij hawm.
Txawm hais tias qhov kev daws teeb meem ntawm lub tshuab ntsuas hluav taws xob yog siab dua li ntawm lub tshuab ntsuas qhov muag, nws muaj qee qhov tsis zoo:
1. Hauv lub tshuab ntsuas hluav taws xob, cov qauv yuav tsum tau soj ntsuam hauv lub tshuab nqus tsev, yog li tsis tuaj yeem soj ntsuam cov qauv nyob. Nrog rau kev nce qib ntawm thev naus laus zis, ib puag ncig scanning electron microscopes yuav maj mam paub qhov kev soj ntsuam ncaj qha ntawm cov qauv nyob;
2. Thaum ua cov qauv, nws yuav tsim cov qauv uas cov qauv tsis muaj, uas ua rau qhov nyuaj ntawm kev txheeb xyuas cov duab tom qab;
3. Vim muaj zog electron scattering peev xwm, nws yog nquag mus rau theem nrab diffraction, thiab lwm yam .;
4. Vim tias nws yog ob-dimensional dav hlau projection duab ntawm ib qho khoom peb-dimensional, qee zaum cov duab tsis txawv;
5. Txij li thaum kis tau tus mob electron microscopy tsuas tuaj yeem soj ntsuam cov qauv nyias nyias, nws muaj peev xwm hais tias cov qauv ntawm cov khoom siv sib txawv ntawm cov qauv ntawm cov khoom siv sab hauv;
6. Rau cov qauv ultra-nyias (qis dua 100 nanometers), cov txheej txheem kev npaj cov qauv yog qhov nyuaj thiab nyuaj, thiab cov qauv kev npaj tau puas lawm;
7. Cov kab hluav taws xob tuaj yeem rhuav tshem cov qauv los ntawm kev sib tsoo thiab cua sov;
8. Tus nqi ntawm electron microscope yuav thiab kev saib xyuas yog qhov siab.
