Mu kafukufukuyu, tidafufuza ma Cu/Ni nanoparticles opangidwa mu ma microcarbon magwero panthawi yolumikizana ndi RF sputtering ndi RF-PECVD, komanso kumveka kwa plasmon komwe kumapezeka kuti azindikire mpweya wa CO pogwiritsa ntchito Cu/Ni nanoparticles. Morphology ya particles. Surface morphology idaphunziridwa ndikusanthula ma micrographs a 3D atomic force process pogwiritsa ntchito mafotokozedwe azithunzi ndi njira zowunikira za fractal/multifractal. Kusanthula kwa ziwerengero kunachitika pogwiritsa ntchito pulogalamu ya MountainsMap® Premium yokhala ndi kusanthula kwanjira ziwiri (ANOVA) komanso kuyesa kocheperako. Ma nanostructures apamwamba amagawidwa m'deralo komanso padziko lonse lapansi. The experimental ndi zoyerekeza Rutherford backscattering sipekitiramu anatsimikizira khalidwe la nanoparticles. Zitsanzo zomwe zangokonzedwa kumene zidawululidwa ku chimney cha carbon dioxide ndipo kugwiritsidwa ntchito kwawo ngati sensa ya gasi kudafufuzidwa pogwiritsa ntchito njira yapamadzi ya plasmon resonance. Kuwonjezera kwa nickel wosanjikiza pamwamba pa mkuwa wa mkuwa kunasonyeza zotsatira zosangalatsa zonse zokhudzana ndi morphology ndi kufufuza gasi. Kuphatikizika kwa kusanthula kwapamwamba kwa stereo ya mawonekedwe owoneka bwino a filimu yocheperako ndi Rutherford backscattering spectroscopy ndi spectroscopic kusanthula ndikwapadera pagawoli.
Kuwonongeka kwa mpweya kwachangu m'zaka makumi angapo zapitazi, makamaka chifukwa cha kukula kwa mafakitale, kwachititsa ofufuza kuti adziwe zambiri za kufunika kozindikira mpweya. Metal nanoparticles (NPs) awonetsedwa kuti ndi zida zodalirika zamasensa a gasi1,2,3,4 ngakhale poyerekeza ndi mafilimu ocheperako achitsulo omwe amatha kutulutsa plasmon resonance (LSPR), chomwe ndi chinthu chomwe chimalumikizana ndi maginito amphamvu komanso ocheperako. minda5,6,7,8. Monga chitsulo chotsika mtengo, chapoizoni chotsika, komanso chosinthasintha, mkuwa umadziwika kuti ndi chinthu chofunikira kwambiri ndi asayansi ndi mafakitale, makamaka opanga masensa9. Kumbali ina, zopangira zitsulo za nickel transition zimagwira ntchito bwino kuposa zida zina10. Kugwiritsa ntchito kodziwika bwino kwa Cu / Ni pa nanoscale kumawapangitsa kukhala ofunika kwambiri, makamaka chifukwa chakuti mapangidwe awo apangidwe samasintha pambuyo pa fusion11,12.
Ngakhale ma nanoparticles achitsulo ndi mawonekedwe awo ndi dielectric sing'anga amawonetsa kusintha kwakukulu pamawonekedwe amtundu wa plasmon, motero akhala akugwiritsidwa ntchito ngati zomangira zopangira gasi13. Pamene mayamwidwe sipekitiramu kusintha, izi zikutanthauza kuti zinthu zitatu za resonant wavelength ndi/kapena mayamwidwe pachimake pachimake ndi/kapena FWHM akhoza kusintha ndi 1, 2, 3, 4. Pamalo nanostructured, amene mwachindunji zogwirizana ndi tinthu kukula, localized pamwamba plasmon resonance mu nanoparticles, osati m'mafilimu oonda, ndi chinthu chothandiza pozindikira maselo. absorption14, monga adaneneranso Ruiz et al. adawonetsa mgwirizano pakati pa particles zabwino ndi kuzindikira bwino15.
Ponena za kuzindikira kwa kuwala kwa mpweya wa CO, zida zina zophatikizika monga AuCo3O416, Au-CuO17 ndi Au-YSZ18 zafotokozedwa m'mabuku. Tikhoza kuganiza za golide ngati chitsulo cholemekezeka chophatikizidwa ndi oxides zitsulo kuti azindikire mamolekyu a mpweya omwe amapangidwa ndi mankhwala pamwamba pa gulu, koma vuto lalikulu ndi masensa ndi momwe amachitira kutentha, kuwapanga kukhala osafikirika.
Pazaka makumi angapo zapitazi, atomic force microscopy (AFM) yakhala ikugwiritsidwa ntchito ngati njira yotsogola yozindikiritsa ma micromorphology atatu-dimensional surface nanoscale resolution19,20,21,22. Kuphatikiza apo, stereo, fractal/multifractal analysis23,24,25,26, power spectral density (PSD)27 ndi Minkowski28 functionals ndi zida zamakono zowonetsera mawonekedwe apamwamba a mafilimu opyapyala.
Mu kafukufukuyu, kutengera mayamwidwe amtundu wa plasmon resonance (LSPR), acetylene (C2H2) Cu/Ni NP traces adayikidwa pa firiji kuti agwiritsidwe ntchito ngati masensa mpweya wa CO. Rutherford backscatter spectroscopy (RBS) idagwiritsidwa ntchito kusanthula kapangidwe kake ndi morphology kuchokera pazithunzi za AFM, ndipo mamapu amtundu wa 3D adasinthidwa pogwiritsa ntchito pulogalamu ya MountainsMap® Premium kuphunzira isotropy yapamtunda ndi magawo onse owonjezera a micromorphological of surface microtextures. Kumbali inayi, zotsatira zasayansi zatsopano zikuwonetsedwa zomwe zingagwiritsidwe ntchito kuzinthu zamafakitale ndipo zimakhala ndi chidwi chachikulu pakugwiritsa ntchito kufufuza kwa gasi wamankhwala (CO). Zolemba zimafotokoza kwa nthawi yoyamba kaphatikizidwe, mawonekedwe ndi kugwiritsa ntchito nanoparticle iyi.
Kanema woonda wa Cu / Ni nanoparticles adakonzedwa ndi RF sputtering ndi RF-PECVD co-deposition ndi 13.56 MHz magetsi. Njirayi imachokera pa riyakitala yokhala ndi maelekitirodi awiri azinthu zosiyana ndi kukula kwake. Chaching'onocho ndi chitsulo ngati electrode yopatsa mphamvu, ndipo yaikulu imakhazikika kudzera mu chipinda chachitsulo chosapanga dzimbiri pamtunda wa masentimita 5 kuchokera kwa wina ndi mzake. Ikani gawo laling'ono la SiO 2 ndi chandamale cha Cu m'chipindamo, kenako tulukani m'chipindacho ku 103 N / m 2 monga kuthamanga kwapansi pa kutentha kwa firiji, yambitsani mpweya wa acetylene m'chipindamo, ndiyeno sungani kupanikizika kozungulira. Pali zifukwa ziwiri zazikulu zogwiritsira ntchito mpweya wa acetylene mu sitepe iyi: choyamba, imakhala ngati mpweya wonyamulira kupanga plasma, ndipo kachiwiri, pokonzekera nanoparticles mu kufufuza kwa carbon. Ntchito yoyikayi idachitika kwa mphindi 30 pakukakamiza kwa gasi koyambirira ndi mphamvu ya RF ya 3.5 N/m2 ndi 80 W, motsatana. Kenako thyolani vacuum ndikusintha chandamale kukhala Ni. Njira yoyikayi idabwerezedwanso pakukakamiza kwa gasi koyambirira ndi mphamvu ya RF ya 2.5 N/m2 ndi 150 W, motsatana. Pomaliza, ma nanoparticles amkuwa ndi nickel omwe amayikidwa mumlengalenga wa acetylene amapanga nanostructures zamkuwa/nickel. Onani Gulu 1 pokonzekera zitsanzo ndi zozindikiritsa.
Zithunzi za 3D za zitsanzo zomwe zakonzedwa kumene zinalembedwa mu 1 μm × 1 μm square scan area pogwiritsa ntchito nanometer multimode atomic force microscope (Digital Instruments, Santa Barbara, CA) mumayendedwe osalumikizana ndi liwiro la 10-20 μm / min. . Ndi. Pulogalamu ya MountainsMap® Premium idagwiritsidwa ntchito kukonza mamapu amtundu wa 3D AFM. Malinga ndi ISO 25178-2: 2012 29,30,31, magawo angapo a morphological amalembedwa ndikukambidwa, kutalika, pachimake, voliyumu, mawonekedwe, ntchito, malo ndi kuphatikiza kumatanthauzidwa.
Makulidwe ndi kapangidwe ka zitsanzo zokonzedwa kumene adayerekezedwa pa dongosolo la MeV pogwiritsa ntchito mawonekedwe amphamvu a Rutherford backscattering spectroscopy (RBS). Pankhani yofufuza gasi, LSPR spectroscopy idagwiritsidwa ntchito pogwiritsa ntchito UV-Vis spectrometer mu wavelength kuyambira 350 mpaka 850 nm, pomwe chitsanzo choyimira chinali mu cuvette yachitsulo chosapanga dzimbiri chotseka chokhala ndi mainchesi 5.2 ndi kutalika kwa 13.8 cm. pachiyero cha 99.9 % CO gas flow rate (malinga ndi Arian Gas Co. IRSQ standard, 1.6 mpaka 16 l/h kwa masekondi 180 ndi masekondi 600). Izi zinkachitika kutentha kwa chipinda, chinyezi chozungulira 19% ndi fume hood.
Rutherford backscattering spectroscopy ngati njira yobalalitsira ion idzagwiritsidwa ntchito kusanthula mapangidwe amafilimu oonda. Njira yapaderayi imalola quantification popanda kugwiritsa ntchito ndondomeko yowonetsera. Kusanthula kwa RBS kumayesa mphamvu zambiri (He2+ ions, mwachitsanzo, tinthu tating'onoting'ono ta alpha) pa dongosolo la MeV pazachitsanzo ndi ma ion a He2+ omwazika kumbuyo komweko. Khodi ya SIMNRA ndi yothandiza pofanizira mizere yowongoka ndi ma curve, ndipo kulemberana kwake ndi chiwonetsero cha RBS choyesera chikuwonetsa mtundu wa zitsanzo zokonzedwa. Mawonekedwe a RBS a chitsanzo cha Cu / Ni NP akuwonetsedwa mu Chithunzi 1, pomwe mzere wofiira ndi RBS spectrum yoyesera, ndipo mzere wa buluu ndi chitsanzo cha pulogalamu ya SIMNRA, zikhoza kuwoneka kuti mizere iwiri yowonekera ili bwino. mgwirizano. Chowunikira chomwe chili ndi mphamvu ya 1985 keV chidagwiritsidwa ntchito kuzindikira zinthu zomwe zili mu zitsanzo. The makulidwe chapamwamba wosanjikiza ndi za 40 1E15Atom/cm2 munali 86% Ni, 0,10% O2, 0,02% C ndi 0,02% Fe. Fe imagwirizanitsidwa ndi zonyansa mu chandamale cha Ni panthawi ya sputtering. Nsonga zapamwamba za Cu ndi Ni zimawoneka pa 1500 keV, motsatira, ndi nsonga za C ndi O2 pa 426 keV ndi 582 keV, motsatira. Masitepe a Na, Si, ndi Fe ndi 870 keV, 983 keV, 1340 keV, ndi 1823 keV, motsatana.
Zithunzi za Square 3D topographic AFM za mawonekedwe amafilimu a Cu ndi Cu/Ni NP akuwonetsedwa mu Mkuyu. 2. Kuonjezera apo, mawonekedwe a 2D omwe amaperekedwa mu chithunzi chilichonse amasonyeza kuti ma NP omwe amawonedwa pa filimuyi amalumikizana ndi mawonekedwe ozungulira, ndipo morphology iyi ndi yofanana ndi yomwe ikufotokozedwa ndi Godselahi ndi Armand32 ndi Armand et al.33. Komabe, ma NP athu a Cu sanali agglomerated, ndipo chitsanzo chomwe chili ndi Cu chokha chinasonyeza malo osalala kwambiri omwe ali ndi nsonga zabwino kwambiri kuposa zowonongeka (mkuyu 2a). M'malo mwake, nsonga zotseguka pa zitsanzo za CuNi15 ndi CuNi20 zimakhala ndi mawonekedwe ozungulira komanso apamwamba kwambiri, monga momwe zikuwonetsedwera ndi chiŵerengero cha msinkhu mu Mkuyu 2a ndi b. Kusintha kowoneka bwino kwa kalembedwe ka filimu kukuwonetsa kuti pamwamba pake pali mawonekedwe osiyanasiyana amlengalenga, omwe amakhudzidwa ndi nthawi yoyika nickel.
Zithunzi za AFM za Cu (a), CuNi15 (b), ndi CuNi20 (c) mafilimu oonda. Mamapu oyenerera a 2D, magawo okwera ndi ma curve a Abbott Firestone amaphatikizidwa pachithunzi chilichonse.
The pafupifupi mbewu kukula kwa nanoparticles anayerekezera kuchokera m'mimba mwake kugawa histogram analandira poyesa 100 nanoparticles ntchito Gaussian zoyenera monga momwe MKULU. Zitha kuwoneka kuti Cu ndi CuNi15 ali ndi kukula kwake kwambewu (27.7 ndi 28.8 nm), pamene CuNi20 ili ndi timbewu tating'ono (23.2 nm), yomwe ili pafupi ndi mtengo womwe unanenedwa ndi Godselahi et al. 34 (pafupifupi 24 nm). M'machitidwe a bimetallic, nsonga za plasmon resonance yokhazikika imatha kusuntha ndikusintha kukula kwambewu35. Pachifukwa ichi, tikhoza kunena kuti nthawi yayitali ya Ni deposition imakhudza zinthu za plasmonic za Cu / Ni mafilimu oonda a dongosolo lathu.
Kugawa kwa tinthu tating'onoting'ono ta (a) Cu, (b) CuNi15, ndi (c) CuNi20 mafilimu oonda opangidwa kuchokera ku AFM topography.
Maonekedwe ambiri amakhalanso ndi gawo lofunikira pakusintha kwamalo kwa mawonekedwe amtundu wa mafilimu opyapyala. Table 2 imatchula magawo otengera kutalika kwa mapu okhudzana ndi mapu a AFM, omwe atha kufotokozedwa ndi nthawi yanthawi yovuta (Sa), skewness (Ssk), ndi kurtosis (Sku). Miyezo ya Sa ndi 1.12 (Cu), 3.17 (CuNi15) ndi 5.34 nm (CuNi20), motsatana, kutsimikizira kuti mafilimuwo amakhala ovuta kwambiri pakuwonjezeka kwa nthawi ya Ni. Makhalidwewa akufanana ndi omwe adanenedwapo kale ndi Arman et al.33 (1-4 nm), Godselahi et al.34 (1-1.05 nm) ndi Zelu et al.36 (1.91-6.32 nm ), pomwe zofanana ndizofanana sputtering inkachitika pogwiritsa ntchito njirazi kusungitsa mafilimu a Cu/Ni NPs. Komabe, Ghosh et al.37 adayika Cu/Ni multilayers ndi electrodeposition ndipo adanenanso kuti ndizovuta kwambiri, mwachiwonekere mu 13.8 mpaka 36 nm. Tiyenera kuzindikira kuti kusiyana kwa ma kinetics a mapangidwe a pamwamba ndi njira zosiyana zowonetsera kungayambitse kupanga malo okhala ndi mawonekedwe osiyanasiyana. Komabe, zitha kuwoneka kuti njira ya RF-PECVD ndiyothandiza kupeza mafilimu a Cu/Ni NPs okhala ndi roughness osapitilira 6.32 nm.
Ponena za kutalika kwake, nthawi zowerengera zapamwamba za Ssk ndi Sku zimagwirizana ndi asymmetry ndi chizolowezi chogawa kutalika, motsatana. Makhalidwe onse a Ssk ndi abwino (Ssk> 0), kusonyeza kutalika kwa mchira38, womwe ukhoza kutsimikiziridwa ndi chiwembu chogawa kutalika mu gawo 2. Kuphatikiza apo, mbiri yonse yautali inali yoyendetsedwa ndi nsonga yakuthwa 39 (Sku> 3) , kusonyeza kuti piritsi Kugawa kwautali kumakhala kochepa kwambiri kusiyana ndi mapindikidwe a belu la Gaussian. Mzere wofiyira mu chiwembu chogawa chautali ndi curve ya Abbott-Firestone 40, njira yoyenera yowerengera yowunikira kugawa kwanthawi zonse kwa data. Mzerewu umachokera ku chiwongola dzanja chambiri pa histogram, pomwe nsonga yapamwamba kwambiri komanso mozama kwambiri imagwirizana ndi zocheperako (0%) komanso zopambana (100%). Ma curve a Abbott-Firestone awa ali ndi mawonekedwe osalala a S pa y-axis ndipo nthawi zonse akuwonetsa kuwonjezereka kwapang'onopang'ono kwa zinthu zomwe zidawoloka kudera lophimbidwa, kuyambira pachimake choyipa komanso champhamvu kwambiri. Izi zimatsimikizira mawonekedwe a malo a pamwamba, omwe amakhudzidwa makamaka ndi nthawi yoyika nickel.
Table 3 imatchula magawo enieni a ISO morphology okhudzana ndi gawo lililonse lopezedwa pazithunzi za AFM. Ndizodziwika bwino kuti chiŵerengero cha chigawo cha zinthu (Smr) ndi chiwerengero cha zinthu (Smc) ndizomwe zimagwiritsidwa ntchito pamtunda29. Mwachitsanzo, zotsatira zathu zikuwonetsa kuti dera lomwe lili pamwamba pa ndege yapakatikati yamtunda ndilokwera kwambiri m'mafilimu onse (Smr = 100%). Komabe, zikhulupiriro za Smr zimachokera kumtunda wosiyanasiyana wa terrain41, popeza gawo la Smc limadziwika. Khalidwe la Smc likufotokozedwa ndi kuwonjezeka kwa roughness kuchokera ku Cu → CuNi20, komwe kungawonekere kuti mtengo wapamwamba kwambiri wa CuNi20 umapereka Smc ~ 13 nm, pamene mtengo wa Cu uli pafupi ndi 8 nm.
Kuphatikizika magawo RMS gradient (Sdq) ndi otukuka mawonekedwe dera chiŵerengero (Sdr) ndi magawo okhudzana flatness kapangidwe ndi zovuta. Kuchokera ku Cu → CuNi20, mitengo ya Sdq imachokera ku 7 mpaka 21, zomwe zikuwonetsa kuti zolakwika zamtundu wa mafilimu zimawonjezeka pamene Ni wosanjikiza waikidwa kwa 20 min. Zindikirani kuti pamwamba pa CuNi20 silathyathyathya ngati Cu. Kuonjezera apo, zinapezeka kuti mtengo wa parameter Sdr, wokhudzana ndi zovuta za microtexture pamwamba, ukuwonjezeka kuchokera ku Cu → CuNi20. Malinga ndi kafukufuku wa Kamble et al.42, zovuta za pamwamba pa microtexture zimawonjezeka ndi kuwonjezeka kwa Sdr, kusonyeza kuti CuNi20 (Sdr = 945%) ili ndi microstructure yovuta kwambiri poyerekeza ndi mafilimu a Cu (Sdr = 229%). . M'malo mwake, kusintha kwa zovuta zazing'ono za kapangidwe kake kumakhala ndi gawo lalikulu pakugawa ndi mawonekedwe a nsonga zokhotakhota, zomwe zitha kuwonedwa kuchokera kumayendedwe amtundu wapamwamba kwambiri (Spd) ndi masamu amatanthauza kupindika kwapamwamba (Spc). Pachifukwa ichi, Spd ikuwonjezeka kuchokera ku Cu → CuNi20, kusonyeza kuti nsonga zake zimakonzedwa bwino ndikuwonjezeka kwa Ni wosanjikiza makulidwe. Kuonjezera apo, Spc imawonjezeranso kuchokera ku Cu→ CuNi20, kusonyeza kuti mawonekedwe apamwamba a pamwamba pa chitsanzo cha Cu ndi ozungulira kwambiri (Spc = 612), pamene CuNi20 ndi yakuthwa (Spc = 925).
Mawonekedwe ovuta a filimu iliyonse amawonetsanso mawonekedwe osiyana siyana pamtunda, pachimake, komanso pamtunda. Kutalika kwa pachimake (Sk), kutsika pachimake (Spk) (pamwamba pa phata), ndi ufa (Svk) (pansi pa phata) 31,43 ndi magawo omwe amayezedwa molingana ndi ndege30 ndikuwonjezeka kuchokera ku Cu → CuNi20 chifukwa cha pamwamba roughness Kuwonjezeka kwakukulu . Momwemonso, peak material (Vmp), core material (Vmc), trough void (Vvv), ndi core void void (Vvc)31 zikuwonetsa zomwe zimafanana ndi kuchuluka kwa zinthu zonse kuchokera ku Cu → CuNi20. Khalidweli likuwonetsa kuti pamwamba pa CuNi20 imatha kukhala ndi madzi ochulukirapo kuposa zitsanzo zina, zomwe zili zabwino, zomwe zikuwonetsa kuti pamwamba pake ndi yosavuta kupaka44. Choncho, tisaiwale kuti monga makulidwe a faifi wosanjikiza ukuwonjezeka kuchokera CuNi15 → CuNi20, kusintha kwa topographic mbiri yatsala pang'ono kusintha apamwamba-kuti morphological magawo, zimakhudza pamwamba microtexture ndi malo chitsanzo filimu.
Kuwunika kwabwino kwa mawonekedwe a filimuyi kunapezedwa popanga mapu a AFM pogwiritsa ntchito pulogalamu yamalonda ya MountainsMap45. Kutanthauzira kukuwonetsedwa mu Chithunzi 4, chomwe chikuwonetsa poyambira ndi polar polar polemekeza pamwamba. Table 4 imatchula malo ndi malo omwe mungasankhe. Zithunzi za grooves zimasonyeza kuti chitsanzocho chimayendetsedwa ndi njira yofanana ya njira zomwe zimatchulidwa kuti homogeneity ya grooves. Komabe, magawo a kuya kwapakati (MDF) ndi kuya kwapakati (MDEF) akuwonjezeka kuchoka ku Cu kufika ku CuNi20, kutsimikizira zomwe zawona m'mbuyomu za mphamvu yamafuta a CuNi20. Tikumbukenso kuti Cu (mkuyu. 4a) ndi CuNi15 (mkuyu. 4b) zitsanzo ndi pafupifupi mtundu mamba, zomwe zikusonyeza kuti microtexture wa Cu filimu pamwamba sanali kusintha kwambiri pambuyo filimu Ni waikidwa kwa 15 min. Mosiyana ndi zimenezi, chitsanzo cha CuNi20 (mkuyu 4c) chimasonyeza makwinya omwe ali ndi masikelo amtundu wosiyana, omwe amagwirizana ndi MDF ndi MDEF apamwamba.
Grooves ndi pamwamba isotropy ya microtextures Cu (a), CuNi15 (b), ndi CuNi20 (c) mafilimu.
Chithunzi cha polar mu mkuyu. 4 ikuwonetsanso kuti pamwamba pa microtexture ndi yosiyana. Ndizodabwitsa kuti kuyika kwa Ni layer kumasintha kwambiri mawonekedwe a malo. Ma microtextural isotropy owerengeka a zitsanzo anali 48% (Cu), 80% (CuNi15), ndi 81% (CuNi20). Tingaone kuti mafunsidwe a Ni wosanjikiza kumathandiza kuti mapangidwe isotropic microtexture, pamene wosanjikiza umodzi Cu filimu ali kwambiri anisotropic pamwamba microtexture. Kuonjezera apo, maulendo akuluakulu a malo a CuNi15 ndi CuNi20 ndi otsika chifukwa chautali wawo waukulu wa autocorrelation (Sal) 44 poyerekeza ndi zitsanzo za Cu. Izi zimaphatikizidwanso ndi maonekedwe a tirigu ofanana omwe amawonetsedwa ndi zitsanzozi (Std = 2.5 ° ndi Std = 3.5 °), pamene mtengo waukulu kwambiri unalembedwa kwa Cu sampuli (Std = 121 °). Kutengera zotsatira izi, makanema onse amawonetsa kusiyanasiyana kwakutali chifukwa cha mawonekedwe osiyanasiyana, mawonekedwe amtundu, komanso kuuma. Chifukwa chake, zotsatirazi zikuwonetsa kuti nthawi ya Ni layer deposition imakhala ndi gawo lofunikira pakupangidwira kwa CuNi bimetallic sputtered surfaces.
Kuti muphunzire za khalidwe la LSPR la Cu/Ni NPs mu mpweya kutentha kwa firiji komanso pa mpweya wosiyanasiyana wa CO, mayamwidwe a UV-Vis anagwiritsidwa ntchito mu kutalika kwa 350-800 nm, monga momwe tawonetsera pa Chithunzi 5 cha CuNi15 ndi CuNi20. Poyambitsa kachulukidwe ka mpweya wosiyanasiyana wa CO, nsonga yabwino ya LSPR CuNi15 idzakhala yotakata, kuyamwa kwake kudzakhala kolimba, ndipo nsonga yake idzasuntha (redshift) kupita kumtunda wapamwamba, kuchokera ku 597.5 nm mukuyenda kwa mpweya kupita ku 16 L/h 606.0 nm. CO ikuyenda kwa masekondi 180, 606.5 nm, CO ikuyenda 16 l / h kwa masekondi 600. Kumbali ina, CuNi20 imasonyeza khalidwe losiyana, kotero kuti kuwonjezeka kwa mpweya wa CO kumabweretsa kuchepa kwa LSPR peak wavelength position (blueshift) kuchokera ku 600.0 nm pa mpweya wopita ku 589.5 nm pa 16 l / h CO kuyenda kwa 180 s. . 16 l / h CO ikuyenda kwa masekondi 600 pa 589.1 nm. Monga ndi CuNi15, titha kuwona nsonga yotakata komanso kuchuluka kwa mayamwidwe a CuNi20. Zitha kuganiziridwa kuti ndi kuwonjezeka kwa makulidwe a Ni wosanjikiza pa Cu, komanso kuwonjezeka kwa kukula ndi chiwerengero cha CuNi20 nanoparticles m'malo mwa CuNi15, Cu ndi Ni particles amayandikirana wina ndi mzake, matalikidwe a oscillations amagetsi amawonjezeka. , ndipo, chifukwa chake, mafupipafupi amawonjezeka. kutanthauza: kutalika kwa mafunde kumachepa, kusintha kwa buluu kumachitika.
Nthawi yotumiza: Aug-16-2023