Daim ntawv thov thiab cov yam ntxwv ntawm Transmission electron microscopy
Transmission electron microscopy (TEM) yog lub tshuab ntsuas siab siv los soj ntsuam cov qauv sab hauv ntawm cov qauv. Nws siv lub teeb hluav taws xob los nkag mus rau cov qauv thiab tsim cov duab kos duab, uas yog tom qab ntawd txhais thiab txheeb xyuas kom pom qhov microstructure ntawm tus qauv.
1. Cov khoom siv hluav taws xob
TEM siv lub teeb hluav taws xob hloov lub teeb ntawm lub teeb. Lub Talos series kis tau tus mob electron microscope nruab los ntawm Jifeng Electronic MA Laboratory siv rab phom ultra-high brightness electron, thaum HF5000 spherical aberration kis tau tus mob electron microscope siv rab phom txias electron.
2. Lub tshuab nqus tsev
Txhawm rau kom tsis txhob muaj kev cuam tshuam ntawm cov kab hluav taws xob thiab cov pa roj ua ntej dhau los ntawm cov qauv, tag nrho lub tshuab tsom iav yuav tsum tau khaws cia nyob rau hauv lub tshuab nqus tsev siab.
3. Cov qauv kis tau tus mob
Cov qauv yuav tsum yog pob tshab, txhais tau hais tias lub teeb hluav taws xob tuaj yeem nkag mus rau nws, cuam tshuam nrog nws, thiab tsim cov duab kos duab. Feem ntau, lub thickness ntawm cov qauv yog li ntawm nanometers mus rau submicrons. Jifeng Electronics tau nruab nrog kaum ob ntawm Helios 5 series FIBs rau kev npaj cov qauv zoo ultra-thin TEM.
4. Hluav taws xob kis tau tus mob
Lub teeb hluav taws xob yog tsom los ntawm kev sib kis. Cov lo ntsiab muag no zoo ib yam li lo ntsiab muag hauv optical microscopes, tab sis vim yog luv luv wavelength ntawm electrons piv rau lub teeb nthwv dej, kev tsim thiab kev tsim khoom rau lo ntsiab muag yog siab dua.
5. Daim duab dav hlau
Tom qab dhau los ntawm cov qauv, lub teeb hluav taws xob nkag mus rau hauv ib lub dav hlau duab. Nyob rau hauv lub dav hlau no, cov ntaub ntawv ntawm lub teeb hluav taws xob yog hloov dua siab tshiab rau hauv ib qho duab thiab ntes los ntawm tus ntes.
6. Ntes
Cov khoom siv ntau tshaj plaws yog cov ntxaij vab tshaus fluorescent, CCD (them khoom sib txuas) lub koob yees duab, lossis CMOS (cov khoom siv ntxiv hlau oxide semiconductor) koob yees duab. Thaum lub teeb hluav taws xob cuam tshuam nrog lub vijtsam fluorescent ntawm daim duab dav hlau, pom lub teeb pom kev, tsim cov duab kos duab ntawm cov qauv, uas feem ntau siv los nrhiav cov qauv. Vim qhov xav tau rau cov ntxaij vab tshaus fluorescent siv nyob rau hauv ib puag ncig tsaus ntuj, uas tsis yog siv rau cov neeg siv kev lag luam, cov tuam txhab lag luam tam sim no yuav nruab lub koob yees duab saum toj ntawm sab ntawm lub vijtsam fluorescent, tso cai rau TEM cov neeg ua haujlwm saib xyuas cov zaub hauv qhov kaj. ib puag ncig rau kev tshawb nrhiav cov qauv, tilting txoj siv ncej, thiab lwm yam haujlwm. Qhov kev txhim kho tsis pom zoo no yog lub hauv paus rau kev ua tiav kev sib cais ntawm tib neeg-tshuab.
7. Cov duab tsim
Thaum cov kab hluav taws xob hla dhau ntawm cov qauv, nws cuam tshuam nrog cov atoms thiab cov qauv siv lead ua hauv cov qauv, tawg thiab nqus. Raws li cov kev sib cuam tshuam no, kev siv hluav taws xob hluav taws xob yuav tsim ib daim duab ntawm lub dav hlau duab. Cov duab no yog tag nrho cov duab ob-dimensional projection, tab sis cov qauv sab hauv ntawm cov qauv feem ntau yog peb-dimensional, yog li tshwj xeeb yuav tsum tau them rau qhov no thaum txheeb xyuas cov ncauj lus kom ntxaws hauv cov qauv.
8. Kev tshuaj xyuas thiab kev txhais lus
Los ntawm kev soj ntsuam thiab tshuaj xyuas cov duab, cov kws tshawb fawb tuaj yeem nkag siab cov qauv siv lead ua qauv, cov kab lattice tsis zoo, Crystallographic defect, atomic arrangement thiab lwm cov ntaub ntawv microstructure. Ji Feng muaj ib pab neeg soj ntsuam cov ntaub ntawv uas muaj peev xwm muab cov neeg muas zaub nrog tag nrho cov txheej txheem tsom xam cov kev daws teeb meem thiab kev tshaj lij cov ntaub ntawv soj ntsuam cov ntaub ntawv.
