Dej yog cov khoom siv ntuj tsim uas tib neeg nyob thiab siv rau ntau thaj chaw. Nyob rau hauv xyoo tas los no, tus qauv thiab ntws tswj ntawm cov kab dej hauv cov dej tau nyiam ntau yam hauv cov khoom siv science, chemistry, thiab biomedicine.
"Txiav dej nrog rab riam"? Lub Cuaj Hlis 1, tus neeg sau xov xwm tau tshaj tawm tias Xi'an Jiaotong University thiab Northwestern Polytechnical University tshawb fawb pab pawg tau sib koom tes los tso "laser txiav dej" thev naus laus zis tshiab, thiab kev paub txog lub tswv yim no, rau "dej!" Daim ntawv thov dej. muab lub tswv yim tshiab.
Laser txiav "dej ncuav mog qab zib" ua los ntawm ntau yam qauv.
Realization ntawm txiav thiab ua cov dej los ntawm laser
Yuav ua li cas "tame" dej thiab muab tso rau siv tau yog ib qho kev kawm txij thaum ub. Kev txiav dej, hauv tib neeg lub qhov muag yog qhov tsis txaus ntseeg, raws li Tang Dynasty kws sau paj lug Li Bai zaj paj huam nto moo: "Kev kos ib rab riam txiav cov dej ntau dua dej, tsa ib lub khob kom tshem tawm kev nyuaj siab ntau dua." Raws li kev xav hauv, dej, raws li cov kua dej tsis sib haum, yog qhov nyuaj rau cov yas thiab txiav los ntawm cov txheej txheem ib txwm muaj.
Niaj hnub no, lub ntsiab lus tseem ceeb ntawm kev tswj cov morphology thiab ntws ntawm cov kab dej yog ua ntej ua cov khoom sib txuas. Txawm li cas los xij, vim muaj qhov tsis sib xws thiab qhov dej ntawm cov dej, qhov tseeb machining dej tseem nyuaj. Puas tuaj yeem laser txiav, raws li cov thev naus laus zis uas siv cov nyhuv photothermal los ua cov khoom siv, pab kom txiav thiab ua dej?
Raws li lub tswv yim saum toj no, Prof. Li Fei pawg ntawm Lub Tsev Kawm Ntawv ntawm Kev Tshawb Fawb Txog Lub Neej thiab Tshuab ntawm Xi'an Jiaotong University thiab Associate Prof. Li Xiaoguang pawg ntawm Lub Tsev Kawm Ntawv ntawm Physics ntawm Northwestern Polytechnical University tau koom tes los siv lub laser, uas yog lub npe hu ua "saiest riam", thiab txais yuav laser ua tshuab los ntawm kev tswj lub fluidity thiab nto nro zog ntawm dej. Siv tshuab laser ua tshuab, pab pawg paub txog lub tswv yim ntawm "laser txiav dej" los ntawm kev kho cov dej ntws thiab qhov nro ntawm cov dej, tig "txiav dej nrog rab riam" rau hauv qhov tseeb.
Pab pawg thawj zaug siv hydrophobic silica nanoparticles los pleev xim rau saum npoo ntawm dej, tsim "dej ncuav mog qab zib" nrog lub thickness ntawm submillimeter, thiab tom qab ntawd txiav "dej ncuav mog qab zib" nrog lub laser, ua tiav lub tswv yim ntawm "laser dej txiav" thiab " laser txiav dej". Lub tswv yim ntawm "laser txiav dej" tau ua tiav tiav, thiab ntau yam "cov qauv" raug tsim.
Kos qhov laj thawj yog vim li cas "dej ncuav mog qab zib" tuaj yeem txiav
Vim li cas lub laser tej yam yees siv txiav dej? Pab neeg tshawb fawb, "dej ncuav mog qab zib" tuaj yeem txiav los ntawm laser rau ob lub laj thawj tseem ceeb: Ua ntej, "dej ncuav mog qab zib" nto ntawm silica nanoparticles ntawm lub wavelength ntawm 10.6 microns ntawm infrared laser muaj zog nqus, tom qab laser irradiation, silica nanoparticles. Tom qab laser irradiation, silica nanoparticles nqus laser zog hloov mus rau cua sov rau dej vaporization; thib ob, thaum cov dej hauv zos vaporized, cov dej ntws yuav ua rau cov silica nanoparticles tuaj yeem npog cov dej ntws tawm, yog li tiv thaiv cov dej "kho" txheej txheem.
Li Fei kev taw qhia, pab pawg kuj tau tshawb xyuas qhov ntim dej los ntawm kev sim ntawm thaj chaw "dej ncuav mog qab zib", "dej ncuav mog qab zib" thickness ntawm qhov ua tau ntawm kev txiav thiab "dej ncuav mog qab zib" thickness, laser scanning ceev ntawm kev ua tau zoo Cov kev sim ua kom zoo ntawm "laser dej txiav" tau txais. Tom qab ntawd, lub laser cutter tau siv los ua kom tiav cov txheej txheem feem ntau siv microfluidic chips, suav nrog cov kab sib txuas thiab cov kab sib cais, lees paub lub peev xwm ntawm "laser dej txiav" los ua cov txheej txheem nyuaj microfluidic, thiab txiav txim siab tias cov microfluidic chips ua tiav los ntawm "laser water cutting" tuaj yeem ncav cuag 350 micrometers yam tsawg kawg nkaus. Nws tau raug txiav txim siab tias qhov tsawg tshaj plaws microfluidic nti ua tiav los ntawm "laser dej txiav" tuaj yeem yog 350 micrometers.
Cov microfluidic chips npaj los ntawm "laser water-slicing" tuaj yeem siv rau hauv ntau qhov chaw.
Kev tswj cov kua dej yog ib qho ntawm cov kev siv tseem ceeb ntawm microfluidic chips thiab cov tee dej. Pab neeg no siv cov microfluidic chips thiab cov tee dej ua tiav los ntawm "laser water slicing" rau cov kua dej cuam tshuam, thiab paub tseeb tias cov kua dej ua haujlwm ntawm kev npaj nws tus kheej txhawb microfluidic chips thiab cov tee dej.
Hauv chav kawm ntawm kev tshawb fawb, raws li qhov qhib ntawm "laser-txiav dej" ua tiav microfluidic nti, pab pawg tau siv "laser-txiav dej" ua cov txheej txheem microfluidic nti ua cov tshuaj tiv thaiv me me kom paub txog cov tshuaj synthesis. Piv txwv li, tooj liab-ammonia complexation thiab synthesis ntawm amino acids nrog hydrated ninhydrin. Raws li lub teeb xa hluav taws xob ntawm "laser-txiav dej" cov txheej txheem microfluidic chips, pab pawg tau tsim lawv ua microreactors rau biochemical sensing thiab colorimetric detection platforms rau kev tshawb nrhiav biomarkers xws li hlau ions, proteins, urea thiab nucleic acids. Thaum kawg, cov txheej txheem microfluidic chips tau siv los ua cov pwm pwm rau electrokinetic manipulation ntawm cov kua hlau thiab synthesis ntawm patterned hydrogels, thiab raws li tshuaj gradient dilution thiab cell culture platforms.
Los ntawm kev tshawb fawb, pab neeg tshiab tau npaj cov txheej txheem rau kev ua dej los ntawm laser txiav, uas daws qhov kev sib tw ntawm kev ua tiav dej los ntawm kev khi cov dej ntws. Microfluidic chips npaj los ntawm laser-txiav dej qhia tau hais tias muaj peev xwm rau kev siv nyob rau hauv ib tug ntau yam ntawm teb, xws li chemistry, noj qab haus huv, ntaub ntawv science thiab biomedicine.
