Qhov sib txawv tseem ceeb ntawm carbon dots thiab quantum dots yog cov pa roj carbon dots yog cov pa roj carbon nanoparticles me me, whereas quantum dots yog cov khoom me me semiconductor.
Ob qho tib si carbon dots thiab quantum dots poob hauv qab ntawm quantum mechanics. Cov no yog cov khoom me me nanoscale.
Cov Carbon Dots yog dab tsi?
Carbon dots yog cov pa roj carbon nanoparticle me me uas muaj qee yam ntawm qhov chaw passivation. Lawv qhov loj me yog tsawg dua 10 nm. Cov dots no tau pom thawj zaug hauv xyoo 2004 yuam kev los ntawm kev ua kom huv ntawm ib leeg-walled carbon nanotubes.
Cov khoom ntawm cov dots tsuas yog nyob ntawm lawv cov qauv thiab cov khoom sib xyaw. Feem ntau ntawm cov sij hawm, ntau carboxyl moieties ntawm cov pa roj carbon dots 's nto impart ib qho zoo heev solubility nyob rau hauv dej thiab biocompatibility. Cov moieties zoo li tso cai rau cov pa roj carbon monoxide ua haujlwm ua cov khoom siv nanoparticles. Ntxiv mus, cov khoom no tsim nyog rau kev hloov kho tshuaj lom neeg thiab kev sib kis ntawm qhov chaw nrog rau ntau yam organic, polymeric, inorganic lossis biological khoom.
Muaj ob txoj hauv kev ntawm kev sib txuas ntawm cov dots carbon. Ob qho no yog txoj hauv kev "top-down" thiab "hauv qab-up". Peb tuaj yeem ua tiav kev tsim cov pa roj carbon monoxide los ntawm cov txheej txheem no los ntawm cov txheej txheem tshuaj, electrochemical thiab lub cev.
Daim duab 01: Cov pa roj carbon Dots npaj los ntawm ntau qhov chaw
Txoj kev "sab saum toj-down" cuam tshuam nrog kev rhuav tshem cov qauv carbon loj (piv txwv li graphite, carbon nanotubes, thiab nanodiamond) rau hauv cov dots nrog kev siv laser ablation, arc tawm, thiab electrochemical method.
Txoj kev "hauv qab-up" ntawm carbon dot ntau lawm suav nrog cov khoom me me xws li carbohydrates, citrate, thiab polymer silica nanocomposites. Cov peev txheej no tau txais kev kho hydrothermal / solvothermal, kev txhawb nqa hluavtaws, thiab cov txheej txheem microwave hluavtaws.
Quantum Dots yog dab tsi?
Quantum dots yog cov khoom me me ntawm cov ntsuas nanometer, muaj cov khoom siv kho qhov muag thiab hluav taws xob uas txawv ntawm cov khoom loj raws li quantum mechanics. Yog hais tias peb saib quantum dots los ntawm illumination nyob rau hauv UV teeb, ib tug electron nyob rau hauv lub quantum dot nyiam mus rau hauv lub xeev muaj zog dua. Cov txheej txheem no sib haum mus rau kev hloov ntawm ib qho hluav taws xob los ntawm lub valance band mus rau qhov conductance band thaum hais txog lub semiconducting quantum dot. Tom qab ntawd cov electron zoo siab tuaj yeem thim rov qab mus rau hauv lub valence band los ntawm kev tso tawm ntawm nws lub zog ntawm lub emission ntawm lub teeb. Lub teeb emission no yog hu ua photoluminescence, thiab peb tuaj yeem ua piv txwv nws raws li hauv qab no:
Daim duab 02: Photoluminescence ntawm Quantum Dots Muab Cov Xim Sib Txawv los ntawm Quantum Dots nrog ntau qhov sib txawv
Feem ntau, cov khoom ntawm quantum dots yog nruab nrab rau cov khoom ntawm cov khoom siv hluav taws xob ntau thiab cov atoms lossis cov molecules. Ntxiv mus, cov khoom optoelectronic ntawm quantum dots hloov raws li kev ua haujlwm ntawm ob qho tib si loj thiab cov duab. Feem ntau, cov quantum dots loj emit ntev wavelengths, thiab cov xim emitted los ntawm cov quantum dots muaj xws li txiv kab ntxwv mus rau liab. Nyob rau hauv sib piv, me me quantum dots zoo li emit luv wavelengths muab nce mus rau xim xws li xiav thiab ntsuab. Txawm li cas los xij, peb tuaj yeem pom tias cov xim tuaj yeem sib txawv nyob ntawm qhov muaj pes tsawg leeg ntawm quantum dot.
Cov ntawv thov loj ntawm quantum dots suav nrog ib leeg-electron transistor manufacturing, solar cell ntau lawm, LEDs ntau lawm, ib leeg-photon qhov chaw, quantum xam, cell biology tshawb fawb, microscopy, thiab kho mob imaging.
Qhov txawv ntawm Carbon Dots thiab Quantum Dots yog dab tsi?
Qhov sib txawv tseem ceeb ntawm carbon dots thiab quantum dots yog cov roj carbon dots yog cov pa roj carbon nanoparticles me me, whereas quantum dots yog me me semiconductor hais. Carbon dots yog siv nyob rau hauv bioimaging, sensing, tshuaj xa, catalysis, optronics, thiab lwm yam, thaum quantum dots yog siv nyob rau hauv ib leeg-electron transistor manufacturing, solar cell ntau lawm, LEDs ntau lawm, ib leeg-photon qhov chaw, quantum xam, cell biology tshawb fawb, microscopy, thiab cov duab kho mob.
Cov infographic hauv qab no teev qhov sib txawv ntawm carbon dots thiab quantum dots nyob rau hauv daim ntawv tabular.
Summary – Carbon Dots vs Quantum Dots
Carbon dots thiab quantum dots tuaj hauv qab ntawm quantum mechanics. Cov no yog me me nanoscale hais. Qhov sib txawv tseem ceeb ntawm carbon dots thiab quantum dots yog tias carbon dots yog cov pa roj carbon nanoparticles me me, whereas quantum dots yog cov khoom me me semiconductor.
