Cov tshuaj dab tsi yog siv los soj ntsuam nrog kev tshuaj ntsuam xyuas electron microscopes?
Lub tshuab ntsuas hluav taws xob ntsuas hluav taws xob (SEM) tau tsim nyob rau xyoo 1965 thiab feem ntau yog siv rau kev tshawb fawb ntawm tes. Nws tsuas yog siv cov teeb liab hluav taws xob theem ob los saib xyuas qhov chaw morphology ntawm tus qauv, uas yog, nws siv lub teeb hluav taws xob nqaim heev los soj ntsuam cov qauv. Kev sib cuam tshuam nrog cov qauv tsim muaj ntau yam teebmeem, qhov tseem ceeb ntawm cov electrons thib ob ntawm cov qauv.
Secondary electrons tuaj yeem tsim cov duab loj loj ntawm cov qauv saum npoo. Cov duab no tau tsim nyob rau hauv lub sijhawm ua ntu zus thaum tus qauv raug tshuaj xyuas, uas yog, cov duab loj tau txais los ntawm kev siv qhov taw tes-los-taw tes.
Scanning electron microscopy (SEM) yog ib qho kev soj ntsuam kev soj ntsuam ntawm cov tshuab hluav taws xob ntawm kev sib kis ntawm electron microscopy thiab optical microscopy. Nws tuaj yeem siv ncaj qha siv cov khoom siv ntawm cov qauv ntawm cov ntaub ntawv saum npoo rau cov duab microscopic. Qhov zoo ntawm lub tshuab ntsuas hluav taws xob ntsuas hluav taws xob yog: ① Nws muaj qhov loj loj, uas tuaj yeem hloov kho tsis tu ncua ntawm 20 thiab 200, 000 zaug; ② Nws muaj qhov tob ntawm qhov loj, qhov loj ntawm qhov pom, thiab cov duab peb sab, thiab tuaj yeem saib ncaj qha rau qhov tsis sib xws ntawm ntau yam qauv. Cov qauv zoo; ③ Kev npaj ua qauv yog yooj yim. Tam sim no scanning electron microscopes tau nruab nrog X-ray lub zog spectrometer cov cuab yeej, uas tuaj yeem soj ntsuam qhov microstructure morphology thiab micro-region tivthaiv tsom xam (xws li SEM-EDS) tib lub sijhawm, yog li niaj hnub no yog ib qho tseem ceeb tshaj plaws ntawm kev tshawb fawb cov cuab yeej.
⑴ Biology: noob, paj ntoos, kab mob...
⑵ Tshuaj: qe ntshav, kab mob...
⑶ Tsiaj txhu: cov hnyuv loj, villi, hlwb, fibers ...
⑷ Khoom siv [1]: ceramics, polymers, hmoov, hlau, hlau inclusions, epoxy resin ...
⑸ Chemistry, physics, geology, metallurgy, minerals, sludge (bacilli), machinery, motors thiab conductive samples, xws li semiconductor (IC, line width ntsuas, cross-section, structure observe...) electronic material, etc.
