Qhov sib txawv ntawm Electron Microscope, Atomic Force Microscope, Scanning Tunneling Microscope
Electron microscope, atomic force microscope, scanning tunneling microscope. Qhov txawv:
ib. Piv nrog rau optical microscopes thiab kis electron microscopes, scanning electron microscopes muaj cov yam ntxwv hauv qab no:
(1) Cov qauv ntawm cov qauv tuaj yeem pom ncaj qha, thiab qhov loj ntawm cov qauv tuaj yeem loj li 120mm × 80mm × 50mm.
(2) Cov txheej txheem kev npaj ua qauv yog yooj yim thiab tsis tas yuav txiav rau hauv nyias nyias.
(3) Cov qauv tuaj yeem muab txhais thiab tig rau hauv qhov chaw peb sab hauv cov qauv chamber, yog li cov qauv tuaj yeem pom los ntawm ntau lub kaum ntse ntse.
(4) Qhov tob ntawm daim teb yog loj, thiab cov duab yog tag nrho ntawm peb-dimensional nyhuv. Qhov tob ntawm thaj chaw ntawm lub tshuab ntsuas hluav taws xob ntsuas hluav taws xob yog ntau pua lub sij hawm loj dua li ntawm lub tshuab ntsuas qhov muag, thiab kaum ob lub sij hawm loj dua li ntawm lub tshuab hluav taws xob xa hluav taws xob.
(5) Qhov kev nthuav dav ntawm daim duab yog qhov dav thiab qhov kev daws teeb meem yog qhov siab. Nws tuaj yeem nthuav tawm los ntawm kaum npaug mus rau ntau pua txhiab zaus, thiab nws pib suav nrog qhov kev nthuav dav los ntawm cov iav tsom iav, kho qhov muag tsom mus rau kev xa hluav taws xob microscope. Qhov kev daws teeb meem yog nruab nrab ntawm lub tshuab kho qhov muag thiab lub tshuab xa hluav taws xob, mus txog 3nm.
(6) Kev puas tsuaj thiab kev kis kab mob ntawm cov qauv los ntawm cov kab hluav taws xob yog me me.
(7) Thaum soj ntsuam cov morphology, lwm cov cim qhia los ntawm cov qauv kuj tuaj yeem siv rau kev txheeb xyuas cov cheeb tsam micro.
2. Atomic force microscope
Atomic Force Microscope (AFM), cov cuab yeej tshuaj ntsuam xyuas uas tuaj yeem siv los kawm txog cov qauv saum npoo ntawm cov khoom siv, suav nrog cov insulators. Nws kawm txog cov qauv saum npoo thiab cov khoom ntawm cov khoom los ntawm kev kuaj xyuas qhov tsis muaj zog ntawm kev sib cuam tshuam ntawm cov qauv ntawm cov qauv los kuaj thiab cov khoom me me ntawm lub zog-rhiab heev. Ib qho kawg ntawm ib khub ntawm micro-cantilevers rhiab heev yog tsau, thiab lub micro-ntsis ntawm lwm qhov kawg yog ze rau cov qauv. Lub sijhawm no, nws yuav cuam tshuam nrog nws, thiab lub zog yuav ua rau lub micro-cantilever deform lossis hloov nws txoj kev txav mus los. Thaum cov qauv raug soj ntsuam, lub sensor yog siv los kuaj xyuas cov kev hloov pauv no, thiab cov ntaub ntawv xa tawm quab yuam tuaj yeem tau txais, yog li cov ntaub ntawv saum toj kawg nkaus cov qauv thiab cov ntaub ntawv roughness tuaj yeem tau txais nrog nanometer daws teeb meem.
Piv nrog rau cov tshuab ntsuas hluav taws xob siv hluav taws xob, atomic force microscopes muaj ntau yam zoo. Tsis zoo li electron microscopes, uas tuaj yeem muab cov duab ob sab xwb, AFMs muab qhov tseeb peb-dimensional daim duab qhia chaw. Nyob rau tib lub sijhawm, AFM tsis xav tau kev kho tshwj xeeb ntawm cov qauv, xws li tooj liab plating lossis carbon, uas tuaj yeem ua rau cov qauv tsis zoo. Thib peb, electron microscopes yuav tsum tau ua haujlwm nyob rau hauv lub tshuab nqus tsev siab, thiab atomic force microscopes tuaj yeem ua haujlwm zoo nyob rau hauv ib txwm muaj siab thiab txawm tias nyob rau hauv cov dej ib puag ncig. Qhov no tuaj yeem siv los kawm txog cov kab mob macromolecules thiab txawm tias cov ntaub so ntswg nyob. Piv nrog rau Scanning Tunneling Microscope, atomic force microscope muaj kev siv dav dua vim nws tuaj yeem soj ntsuam cov qauv uas tsis yog coj mus kuaj. Lub tshuab ntsuas hluav taws xob ntsuas hluav taws xob, uas tau siv dav hauv kev tshawb fawb thiab kev lag luam, yog ua raws li lub tshuab hluav taws xob atomic force microscope.
3. Scanning Tunneling Microscope
① Kev daws teeb meem siab Scanning tunneling microscopy muaj atomic-theem spatial daws teeb meem, nrog rau ib sab spatial daws teeb meem ntawm 1 thiab longitudinal daws teeb meem ntawm 0.1.
② Lub tshuab ntsuas tunneling tuaj yeem tshawb xyuas cov qauv saum npoo ntawm cov qauv, thiab tuaj yeem kos duab peb sab.
③ Scanning tunneling microscopy tuaj yeem kuaj xyuas cov qauv ntawm cov teeb meem hauv lub tshuab nqus tsev, atmospheric siab, huab cua, thiab txawm tias muaj kev daws teeb meem. Vim tias tsis muaj hluav taws xob hluav taws xob hluav taws xob loj, tsis muaj kev puas tsuaj rau saum npoo (xws li hluav taws xob, thermal puas, thiab lwm yam), yog li cov qauv ntawm cov macromolecules lom thiab cov cell membrane nyob hauv lub cev tuaj yeem kawm, thiab cov qauv. yuav tsis puas thiab nyob twj ywm.
④ Lub scanning ceev ntawm scanning tunneling microscope yog ceev, lub sij hawm rau cov ntaub ntawv tau los yog luv luv, thiab cov duab kuj ceev, thiab nws muaj peev xwm mus nqa tawm kinetic kev tshawb fawb ntawm lub neej txheej txheem.
⑤ Nws tsis xav tau lub lens thiab me me. Qee tus neeg hu nws "pocket microscope".
