Dab tsi yog atomic force microscope
Atomic Force Microscopy: Ib qho kev sim tshiab uas siv cov kev sib cuam tshuam ntawm cov atoms thiab cov molecules los saib xyuas cov yam ntxwv ntawm cov khoom siv hauv qhov chaw. Nws muaj ib tug nanometer-loj sojntsuam tsau rau ib tug rhiab heev manipulated micron-loj hloov tau yooj yim cantilever. Thaum qhov kev sojntsuam nyob ze rau tus qauv, lub zog ntawm cov atoms ntawm nws lub ntsis thiab cov atoms ntawm tus qauv nto ua rau lub cantilever khoov ntawm nws qhov qub. Daim duab peb-dimensional yog reconstructed los ntawm tus nqi ntawm deviation los yog zaus ntawm kev co ntawm lub sojntsuam thaum nws scans tus qauv. Nws muaj peev xwm ua tau ncaj qha tau qhov topography lossis atomic muaj pes tsawg leeg ntawm cov qauv saum npoo.
Nws yog siv los 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 sib cuam tshuam ntawm cov qauv saum npoo los ntsuas thiab cov khoom me me ntawm lub zog-rhiab heev. Ib khub ntawm micro-cantilevers, uas tsis tshua muaj siab rau lub zog tsis muaj zog, yog tsau ntawm ib qho kawg, thiab ib qho me me ntawm lwm qhov kawg yog coj los ze rau tus qauv, uas tom qab ntawd cuam tshuam nrog nws, thiab cov rog ua rau micro-cantilevers. kom deform lossis hloov lawv lub xeev ntawm kev txav.
Thaum kuaj xyuas tus qauv, lub sensor pom cov kev hloov pauv no thiab tau txais cov ntaub ntawv ntawm kev faib tawm ntawm lub zog, yog li tau txais cov ntaub ntawv ntawm cov qauv saum npoo nrog nanoscale daws teeb meem. Nws muaj cov microcantilever nrog ib rab koob, lub microcantilever motion detection device, lub voj voog tawm tswv yim los saib xyuas nws cov lus tsa suab, piezoelectric ceramic scanning ntaus ntawv los luam theej duab cov qauv, thiab lub computer tswj cov duab nrhiav tau, tso saib thiab ua haujlwm. Microcantilever tsab ntawv tsa suab tuaj yeem kuaj pom los ntawm cov txheej txheem hluav taws xob xws li tunnel tam sim no nrhiav kom pom lossis kho qhov muag xws li beam deflection thiab interferometry, thiab lwm yam. Thaum lub hau ntawm rab koob thiab cov qauv yog txaus nyob ze rau ib leeg thiab muaj qhov luv luv ntawm kev sib tw ntawm kev sib tw. lawv, qhov repulsion tuaj yeem kuaj pom kom tau qhov saum npoo ntawm atomic theem ntawm kev daws teeb meem ntawm daim duab, thiab feem ntau qhov kev daws teeb meem ntawm nanometer theem.AFM kev ntsuas ntawm cov qauv tsis muaj qhov tshwj xeeb, thiab tuaj yeem siv los ntsuas qhov saum npoo ntawm cov khib nyiab. thiab adsorption systems.
