Qhov sib txawv tseem ceeb ntawm fluorescence thiab phosphorescence thiab luminescence yog txoj kev uas lawv tawm lub teeb. Nyob rau hauv fluorescence, ib yam khoom muaj peev xwm tam sim remit lub absorbed hluav taws xob, thaum nyob rau hauv phosphorescence, cov khoom tsis retmit cov hluav taws xob tam sim ntawd tom qab nqus. Luminescence, ntawm qhov tod tes, yog qhov emission ntawm lub teeb los ntawm cov khoom tsis muaj cua sov vim qee qhov ua rau xws li tshuaj tiv thaiv, hluav taws xob, thiab lwm yam.
Txhua yam fluorescence, phosphorescence thiab luminescence muaj feem xyuam rau qhov emission ntawm lub teeb absorbed los ntawm cov khoom siv.
Fluorescence yog dab tsi?
Fluorescence tuaj yeem txhais tau tias yog lub teeb ci tawm ntawm cov khoom uas tau nqus lub zog yav dhau los. Hom tshuaj no yuav tsum nqus lub teeb lossis lwm yam hluav taws xob hluav taws xob kom tawm lub teeb ua fluorescence. Tsis tas li ntawd, lub teeb emission no yog hom luminescence, txhais tau tias nws emits spontaneously. Lub teeb emitted feem ntau muaj lub wavelength ntev dua li lub teeb absorbed. Qhov ntawd txhais tau hais tias lub teeb hluav taws xob emitted qis dua lub zog nqus.
Nyob rau hauv fluorescence, lub teeb yog emitted los ntawm excitation ntawm atoms nyob rau hauv cov khoom. Lub zog absorbed feem ntau tso tawm raws li luminescence nyob rau hauv lub sij hawm luv luv, txog 10-8 vib nas this. Qhov ntawd txhais tau tias peb tuaj yeem soj ntsuam fluorescence sai li sai tau thaum peb tshem tawm cov hluav taws xob uas ua rau muaj kev ntxhov siab.
Muaj ntau daim ntawv thov ntawm fluorescence nyob rau hauv ntau qhov chaw, xws li mineralogy, gemology, tshuaj, tshuaj sensors, biochemical tshawb fawb, dyes, biological detectors, fluorescent teeb tsim, thiab lwm yam. Ntxiv mus, peb muaj peev xwm nrhiav tau cov txheej txheem no raws li ib tug natural. txheej txheem ib yam nkaus; Piv txwv li, nyob rau hauv ib co minerals.
Phosphorescence yog dab tsi?
Phosphorescence yog ib hom photoluminescence uas cov khoom raug rau lub teeb ntawm lub wavelength luv luv tuaj yeem ua rau cov khoom ci. Qhov no tshwm sim los ntawm kev nqus ntawm lub teeb thiab rov ua dua ntawm lub teeb ntawm qhov ntev wavelength. Cov khoom zoo li nqus tau qee lub zog los ntawm cov hluav taws xob kom rov ua dua nws ntev dua tom qab tshem tawm qhov hluav taws xob.
Muaj ob txoj hauv kev los ntawm qhov uas phosphorescence tuaj yeem tshwm sim: triplet phosphorescence thiab pheej phosphorescence. Triplet phosphorescence tshwm sim thaum lub atom absorbs high-zog photon thaum tsis tu ncua phosphorescence tshwm sim thaum lub high-zog photon absorbed los ntawm ib tug atom, uas ua rau nws mus ntxiab nws electrons nyob rau hauv ib tug tsis xws luag nyob rau hauv lub lattice ntawm crystalline los yog amorphous khoom.
Luminescence yog dab tsi?
Luminescence yog qhov emission ntawm lub teeb los ntawm ib yam khoom uas tsis tau rhuab. Nws yog spontaneous emission ntawm lub teeb los ntawm ib yam khoom. Peb tuaj yeem hu nws "lub teeb txias" vim tias lub teeb tsis tawm los ntawm cov khoom cua sov. Cov ua rau qhov emissions muaj xws li tshuaj lom neeg cov tshuaj tiv thaiv, hluav taws xob lub zog, subatomic motions, los yog kev nyuaj siab ntawm ib tug crystal. Yog li ntawd, peb tuaj yeem yooj yim paub qhov txawv luminescence los ntawm incandescence, vim hais tias nyob rau hauv incandescence, lub teeb emits los ntawm ib tug rhuab qhov chaw. Muaj ntau hom luminescence xws li bioluminescence, chemiluminescence, electroluminescence, photoluminescence, thiab thermoluminescence.
Type of Luminescence
Chemiluminescence yog qhov emission ntawm lub teeb raws li qhov tshwm sim ntawm cov tshuaj tiv thaiv. Ntawm no, lub teeb emission hu ua luminescence. Qhov no txhais tau hais tias lub teeb emits raws li spontaneous emission, tsis yog los ntawm tshav kub los yog txias teeb. Txawm li cas los xij, cov cua sov kuj tuaj yeem tsim. Tom qab ntawd, cov tshuaj tiv thaiv ua rau exothermic.
Bioluminescence qhia txog biochemical emission ntawm lub teeb los ntawm cov kab mob nyob. Nws yog ib hom chemiluminescence. Qhov emission no feem ntau tshwm sim hauv marine vertebrates thiab invertebrates. Txawm li cas los xij, peb tuaj yeem soj ntsuam bioluminescence hauv qee hom fungi, kab mob xws li kab mob bioluminescent, terrestrial arthropods (fireflies), thiab lwm yam.
Photoluminescence yog ib daim ntawv ntawm luminescence uas tshwm sim nrog photoexcitation ntawm photon absorption. Lub teeb emission no tshwm sim thaum ib yam khoom absorbs electromagnetic radiation thiab re-emits cov hluav taws xob. Cov txheej txheem no pib nrog photoexcitation. Qhov no txhais tau hais tias cov electrons ntawm cov khoom raug excitations thaum cov khoom absorbs photons, thiab electrons txav mus rau siab zog xeev los ntawm qis zog xeev. Tom qab cov excitations, muaj cov txheej txheem so thiab. Nyob rau hauv cov kauj ruam so, photons yog re-radiated los yog emissions. Lub sij hawm nruab nrab ntawm qhov nqus thiab emission ntawm photons yuav txawv nyob ntawm seb cov khoom.
Electroluminescence qhia txog cov tshuaj phenomenon uas cov khoom emits lub teeb raws li ib tug teb rau txoj kev ntawm hluav taws xob tam sim no. Peb tuaj yeem sau nws li EL. Qhov no yog ob qho tib si optical phenomenon thiab hluav taws xob tshwm sim. Nws tuaj yeem tshwm sim nyob rau hauv lub xub ntiag ntawm hluav taws xob tam sim no los yog nyob rau hauv lub xub ntiag ntawm ib tug muaj zog hluav taws xob teb. Cov yam ntxwv no txawv ntawm lub cev dub lub teeb emission uas tshwm sim los ntawm ib qho ntawm cov hauv qab no: kub, tshuaj lom neeg, suab, thiab lwm yam kev ua haujlwm.
Thermoluminescence tuaj yeem piav qhia raws li kev tawm ntawm lub teeb los ntawm qee cov ntaub ntawv ntxhia thiab qee cov ntaub ntawv crystalline. Qhov no emission tshwm sim vim lub electron hloov nyob rau hauv lub siv lead ua lattice ntawm cov tshuaj. Qee qhov piv txwv rau cov khoom uas tuaj yeem ua rau cov thermoluminescence muaj xws li ceramic, cib, qhov hluav taws kub, thiab lwm yam.
Qhov txawv ntawm Fluorescence thiab Phosphorescence thiab Luminescence yog dab tsi?
Fluorescence yog qhov emission ntawm lub teeb los ntawm cov khoom uas tau nqus lub zog yav dhau los. Qhov sib txawv tseem ceeb ntawm fluorescence thiab phosphorescence thiab luminescence yog lawv emissions. Nyob rau hauv fluorescence, ib yam khoom muaj peev xwm tam sim remit lub absorbed hluav taws xob, thaum nyob rau hauv phosphorescence, cov khoom tsis retmit cov hluav taws xob tam sim ntawd tom qab nqus. Luminescence, ntawm qhov tod tes, yog qhov emission ntawm lub teeb los ntawm cov khoom tsis muaj cua sov vim yog lwm yam ua rau xws li tshuaj tiv thaiv, hluav taws xob, thiab lwm yam.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm fluorescence thiab phosphorescence thiab luminescence nyob rau hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Fluorescence vs Phosphorescence vs Luminescence
Fluorescence, phosphorescence, thiab luminescence muaj feem xyuam rau qhov emission ntawm lub teeb absorbed los ntawm cov khoom siv. Qhov sib txawv tseem ceeb ntawm fluorescence thiab phosphorescence thiab luminescence yog nyob rau hauv fluorescence, ib yam khoom muaj peev xwm tam sim remit lub absorbed hluav taws xob, tab sis, nyob rau hauv phosphorescence, cov tshuaj tsis retmit cov hluav taws xob tam sim ntawd tom qab nqus. Txawm li cas los xij, luminescence hais txog qhov emission ntawm lub teeb los ntawm cov khoom tsis muaj cua sov vim yog lwm yam ua rau xws li tshuaj tiv thaiv, hluav taws xob hluav taws xob, thiab lwm yam.
