Kolu phononongo, siphande i-Cu/Ni nanoparticles edityaniswe kwimithombo ye-microcarbon ngexesha lokudityaniswa kwe-RF sputtering kunye ne-RF-PECVD, kunye ne-resonance yendawo ye-plasmon yokukhangela i-CO gas usebenzisa i-Cu / Ni nanoparticles. I-Morphology yamasuntswana. I-Surface morphology yaphononongwa ngokuhlalutya i-3D ye-atomic force micrographs kusetyenziswa ukusetyenzwa komfanekiso kunye ne-fractal/multifractal analysis techniques. Uhlalutyo lwamanani lwenziwa kusetyenziswa isoftware yeMountainsMap® Premium kunye nohlalutyo lweendlela ezimbini zokwahluka (ANOVA) kunye novavanyo oluncinci olubalulekileyo. I-nanostructures yomphezulu inosasazo olukhethekileyo lwasekhaya kunye nehlabathi jikelele. Uvavanyo kunye nokulinganisa u-Rutherford backscattering spectra uqinisekisile umgangatho we-nanoparticles. Iisampulu ezisandula ukulungiswa zaye zavezwa kwitshimini ye-carbon dioxide kwaye ukusetyenziswa kwazo njengenzwa yegesi kwaphandwa kusetyenziswa indlela ye-localized surface plasmon resonance. Ukongezwa koluhlu lwe-nickel phezu kwendawo yobhedu lubonise iziphumo ezinomdla zombini kwi-morphology kunye nokufumanisa igesi. Ukudityaniswa kohlalutyo oluphambili lwestereo yefilimu ecekethekileyo yembonakalo yendawo engaphezulu kunye ne-Rutherford backscattering spectroscopy kunye nohlalutyo lwe-spectroscopic yahlukile kule nkalo.
Ungcoliseko lomoya okhawulezayo kule minyaka imbalwa idlulileyo, ingakumbi ngenxa yokwanda kwemizi-mveliso ekhawulezileyo, kuye kwabangela ukuba abaphandi bafunde ngakumbi ngokubaluleka kokufumanisa iigesi. I-Metal nanoparticles (NPs) zibonakaliswe njengezinto ezithembisayo ze-gas sensors1,2,3,4 naxa zithelekiswa neefilim zetsimbi ezibhityileyo ezikwaziyo ukwenza i-localized surface plasmon resonance (LSPR), into ehambelana ne-electromagnetic eyomeleleyo kwaye ilinganiselwe ngamandla. amasimi5,6,7,8. Njengentsimbi engabizi kakhulu, enetyhefu ephantsi, kunye neguquguqukayo, ubhedu luthathwa njengento ebalulekileyo zizazinzulu kunye namashishini, ngakumbi abenzi boluvo9. Ngakolunye uhlangothi, i-nickel transition metal catalysts yenza ngcono kunezinye ii-catalysts10. Ukusetyenziswa okwaziwayo kweCu / Ni kwi-nanoscale kwenza ukuba kubaluleke ngakumbi, ngakumbi kuba izakhiwo zabo zesakhiwo azitshintshi emva kokuxutywa11,12.
Ngelixa i-nanoparticles zetsimbi kunye ne-interfaces yazo kunye ne-dielectric medium ibonisa utshintsho oluphawulekayo kwi-resonances ye-plasmon yendawo yendawo, ziye zasetyenziswa njengeebhloko zokwakha zokufunyanwa kwegesi13. Xa i-spectrum yokufunxa itshintsha, oku kuthetha ukuba izinto ezintathu ze-resonant wavelength kunye / okanye i-absorption intensity intensity kunye / okanye i-FWHM ingatshintsha nge-1, 2, 3, 4. i-plasmon resonance kwi-nanoparticles, kunokuba kwiifilimu ezincinci, yinto esebenzayo yokuchonga imolekyuli. absorption14, njengoko kwaphawulwa nguRuiz et al. ibonise unxulumano phakathi kwamasuntswana amahle kunye nokusebenza kakuhle15.
Ngokumalunga nokubonwa kwe-optical ye-CO gas, ezinye izinto ezidibeneyo ezifana ne-AuCo3O416, i-Au-CuO17 kunye ne-Au-YSZ18 ziye zabikwa kwiincwadi. Sinokucinga ngegolide njengentsimbi ebekekileyo edityaniswe neeoksidi zentsimbi ukubona iimolekyuli zerhasi ezidityaniswe ngemichiza kumphezulu wecomposite, kodwa eyona ngxaki iphambili yezivamvo kukusabela kwazo kubushushu begumbi, nto leyo eyenza ukuba zingafikeleleki.
Kwiminyaka embalwa edlulileyo, i-atomic force microscopy (i-AFM) isetyenziswe njengendlela ephakamileyo yokubonakalisa i-micromorphology yomhlaba we-three-dimensional surface nanoscale resolution19,20,21,22. Ukongezelela, i-stereo, i-fractal / i-multifractal analysis23, i-24, i-25, i-26, i-power spectral density (PSD) i-27 kunye ne-Minkowski28 i-functions zizixhobo zanamhlanje zokubonisa umphezulu we-topography yeefilimu ezincinci.
Kolu phononongo, olusekwe kwi-localized surface plasmon resonance (LSPR) absorption, acetylene (C2H2) Cu/Ni NP traces yafakwa kwindawo yobushushu begumbi ukuze isetyenziswe njenge-CO gas sensors. I-Rutherford backscatter spectroscopy (RBS) yayisetyenziselwa ukuhlalutya ukubunjwa kunye ne-morphology evela kwimifanekiso ye-AFM, kunye neemephu ze-topographic ze-3D zacutshungulwa kusetyenziswa i-MountainsMap® Premium software ukufunda isotropy yomphezulu kunye nazo zonke iiparameters ezongezelelweyo ze-micromorphological of surface microtextures. Ngakolunye uhlangothi, iziphumo ezitsha zenzululwazi ziboniswa ezinokuthi zisetyenziswe kwiinkqubo zoshishino kwaye zinomdla omkhulu kwizicelo zokufumanisa igesi yekhemikhali (CO). Uncwadi lubika ngokokuqala ngqa ukudibanisa, ukubonakaliswa kunye nokusetyenziswa kwale nanoparticle.
Ifilimu encinci ye-Cu / Ni nanoparticles yalungiswa yi-RF sputtering kunye ne-RF-PECVD co-deposition kunye ne-13.56 MHz yombane. Indlela isekelwe kwi-reactor ene-electrode ezimbini zezinto ezahlukeneyo kunye nobukhulu. Incinci yintsimbi njenge-electrode ene-energized, kwaye inkulu isekelwe ngegumbi lensimbi engenasici kumgama we-5 cm ukusuka komnye nomnye. Beka i-substrate ye-SiO 2 kunye ne-Cu target kwigumbi, emva koko ukhuphe i-chamber ukuya kwi-103 N / m 2 njengoxinzelelo lwesiseko kwiqondo lokushisa, ungenise igesi ye-acetylene kwigumbi, kwaye emva koko ucinezele uxinzelelo lwe-ambient. Kukho izizathu ezibini eziphambili zokusebenzisa igesi ye-acetylene kule nyathelo: okokuqala, isebenza njengegesi ethwala ukuveliswa kwe-plasma, kwaye okwesibini, ukulungiselela i-nanoparticles kwi-trace value yekhabhoni. Inkqubo yokubeka iqhutywe i-30 min kuxinzelelo lokuqala lwegesi kunye namandla e-RF ye-3.5 N/m2 kunye ne-80 W, ngokulandelelanayo. Emva koko uphule i-vacuum kwaye utshintshe i-target ye-Ni. Inkqubo yokubeka iphindwe kuxinzelelo lokuqala lwegesi kunye namandla e-RF ye-2.5 N / m2 kunye ne-150 W, ngokulandelanayo. Ekugqibeleni, i-copper kunye ne-nickel nanoparticles efakwe kwi-acetylene atmosphere yenza i-copper / nickel nanostructures. Jonga iTheyibhile yoku-1 ngesampulu yamalungiselelo kunye neziphawuli.
Imifanekiso ye-3D yeesampuli ezisandul 'ukulungiswa zirekhodwe kwindawo ye-square ye-1 μm × 1 μm usebenzisa i-nanometer multimode i-atomic force microscope (i-Digital Instruments, i-Santa Barbara, CA) kwimodi yokungaqhagamshelwanga kwisantya sokuskena se-10-20 μm / min. . Nge. Isoftware yeMountainsMap® Premium isetyenziselwe ukusetyenzwa kweemephu zembonakalo yendawo ye-3D AFM. Ngokutsho kwe-ISO 25178-2: 2012 29,30,31, iiparamitha ezininzi ze-morphological zibhalwe kwaye zixoxwe, ukuphakama, undoqo, umthamo, umlingiswa, umsebenzi, indawo kunye nokudibanisa kuchazwe.
Ubukhulu kunye nokwakhiwa kweesampulu ezisanda kulungiswa zaqikelelwa ngokomyalelo we-MeV usebenzisa i-Rutherford backscattering spectroscopy (RBS) enamandla amakhulu. Kwimeko yokukhangela igesi, i-LSPR spectroscopy isetyenziswe kusetyenziswa i-UV-Vis spectrometer kuluhlu lwamaza ukusuka kwi-350 ukuya kwi-850 nm, ngelixa isampuli yommeli yayikwi-cuvette yentsimbi evaliweyo kunye nobubanzi be-5.2 cm kunye nobude be-13.8 cm ekucocekeni kwe-99.9 % yesantya sokuhamba kwegesi ye-CO (ngokwe-Arian Gas Co. IRSQ standard, I-1.6 ukuya kwi-16 l / h imizuzwana eyi-180 kunye nemizuzwana engama-600). Eli nyathelo lenziwe kwiqondo lobushushu begumbi, ukufuma kwe-ambient eyi-19% kunye ne-fume hood.
I-Rutherford backscattering spectroscopy njengendlela yokusasaza i-ion iya kusetyenziswa ukuhlalutya ukwakhiwa kweefilimu ezibhityileyo. Le ndlela yodwa ivumela ubungakanani ngaphandle kokusetyenziswa komgangatho wereferensi. Uhlalutyo lwe-RBS lulinganisa amandla aphezulu (i-He2 + ion, oko kukuthi amasuntswana e-alpha) ngokomyalelo we-MeV kwisampulu kunye ne-He2 + ion ebuyela emva kwi-angle enikiweyo. Ikhowudi ye-SIMNRA iluncedo ekuboniseni imigca ethe tye kunye neegophe, kunye nembalelwano yayo kwi-spectra ye-RBS yovavanyo ibonisa umgangatho weesampuli ezilungiselelwe. Uluhlu lwe-RBS yesampuli ye-Cu / Ni NP iboniswe kuMfanekiso 1, apho umgca obomvu ngumbono we-RBS yovavanyo, kwaye umgca ohlaza okwesibhakabhaka ukulinganisa inkqubo ye-SIMNRA, kunokubonwa ukuba imigca emibini ye-spectral ilungile. isivumelwano. I-beam yesiganeko esinamandla ka-1985 keV yasetyenziselwa ukuchonga izinto kwisampulu. Ubukhulu bomgangatho ophezulu malunga ne-40 1E15Atom / cm2 equlethe i-86% Ni, 0.10% O2, 0.02% C kunye ne-0.02% Fe. I-Fe inxulunyaniswe nokungcola kwithagethi ye-Ni ngexesha lokutshiza. Ukuphakama kwe-Cu kunye ne-Ni ephantsi kubonakala kwi-1500 keV, ngokulandelanayo, kunye ne-C kunye ne-O2 kwi-426 keV kunye ne-582 keV, ngokulandelanayo. Amanyathelo e-Na, Si, kunye ne-Fe yi-870 keV, 983 keV, 1340 keV, kunye ne-1823 keV, ngokulandelanayo.
Imifanekiso ye-square ye-3D ye-topographic ye-AFM ye-Cu kunye ne-Cu/Ni NP yemiphezulu yefilimu ibonisiwe kumaFigs. 2. Ukongezelela, i-2D topography evezwe kumzobo ngamnye ibonisa ukuba i-NPs ebonwayo kwi-film surface yefilimu idibanisa kwiimilo ze-spherical, kwaye le morphology ifana naleyo ichazwe ngu-Godselahi no-Armand32 kunye no-Armand et al.33. Nangona kunjalo, ii-Cu NP zethu azizange zidibanise, kwaye isampuli equkethe i-Cu kuphela ibonise indawo epholileyo kakhulu kunye neencopho ezicolekileyo kunezo zinqabileyo (umzobo 2a). Ngokuchasene noko, iincopho ezivulekileyo kwi-CuNi15 kunye ne-CuNi20 iisampulu zinesimo esicacileyo se-spherical kunye nobukhulu obuphezulu, njengoko kuboniswe ngumlinganiselo wokuphakama kwi-Fig. 2a kunye ne-b. Utshintsho olubonakalayo kwi-film morphology lubonisa ukuba umphezulu unezakhiwo ezahlukeneyo ze-topographical spatial, ezichatshazelwa lixesha lokubeka i-nickel.
Imifanekiso ye-AFM ye-Cu (a), CuNi15 (b), kunye ne-CuNi20 (c) iifilimu ezincinci. Iimephu ezifanelekileyo ze-2D, ukuhanjiswa kokuphakama kunye neejika ze-Abbott Firestone zifakwe kumfanekiso ngamnye.
Ubungakanani bengqolowa obuqhelekileyo be-nanoparticles buqikelelwa kwi-histogram yokusabalalisa ububanzi obufunyenwe ngokulinganisa i-nanoparticles ye-100 usebenzisa i-Gaussian fit njengoko kuboniswe kwi-FIG. Kuyabonakala ukuba i-Cu kunye ne-CuNi15 inomlinganiselo ofanayo weenkozo (27.7 kunye ne-28.8 nm), ngelixa i-CuNi20 ineenkozo ezincinci (23.2 nm), ezikufutshane nexabiso elichazwe ngu-Godselahi et al. 34 (malunga ne-24 nm). Kwiinkqubo ze-bimetallic, iincopho ze-surface plasmon resonance yendawo zingatshintsha kunye noshintsho kwisayizi yengqolowa35. Kule nkalo, sinokugqiba ukuba ixesha elide lokubeka iNi lichaphazela iipropati ze-plasmonic zeCu / Ni iifilimu ezincinci zenkqubo yethu.
Ukuhanjiswa kobungakanani besuntswana le-(a) Cu, (b) CuNi15, kunye (c) ne-CuNi20 yeefilimu ezicekethekileyo ezifunyenwe kwi-AFM topography.
I-Bulk morphology ikwadlala indima ebalulekileyo kubume bendawo yezakhiwo zembonakalo yelizwe kwiifilim ezibhityileyo. Itheyibhile 2 idwelisa iiparamitha ezisekelwe kubude obusekwe kwi-topographic ehambelana nemephu ye-AFM, enokuthi ichazwe ngamaxabiso exesha lokurhabaxa okuphakathi (Sa), ukushwabana (Ssk), kunye ne-kurtosis (Sku). Amaxabiso e-Sa yi-1.12 (Cu), 3.17 (CuNi15) kunye ne-5.34 nm (CuNi20), ngokulandelanayo, eqinisekisa ukuba iifilimu ziba nzima ngokunyuka kwexesha lokubeka i-Ni. Ezi xabiso zithelekiseka nezo zichazwe ngaphambili ngu-Arman et al.33 (1-4 nm), Godselahi et al.34 (1-1.05 nm) kunye noZelu et al.36 (1.91-6.32 nm ), apho okufanayo okufanayo. ukutshiza kwenziwa kusetyenziswa ezi ndlela zokufaka iifilimu zeCu/Ni NPs. Nangona kunjalo, i-Ghosh et al.37 ifake i-Cu / Ni i-multilayers nge-electrodeposition kwaye ibike amaxabiso aphezulu aphezulu, ngokubonakalayo kuluhlu lwe-13.8 ukuya kwi-36 nm. Kufuneka kuqatshelwe ukuba iiyantlukwano kwi-kinetics yokwakheka komhlaba ngeendlela ezahlukeneyo zokubeka zingakhokelela ekubunjweni kweendawo ezineepateni ezahlukeneyo zendawo. Nangona kunjalo, kunokubonwa ukuba indlela ye-RF-PECVD iyasebenza ekufumaneni iifilimu ze-Cu/Ni NPs ezinoburhabaxa obungekho ngaphezulu kwe-6.32 nm.
Ngokubhekiselele kwiprofayili yokuphakama, amaxesha ezibalo eziphezulu ze-Ssk kunye ne-Sku zihambelana ne-asymmetry kunye nesiqhelo sokusabalalisa ukuphakama, ngokulandelanayo. Zonke iimpawu ze-Ssk zilungile (i-Ssk> 0), ebonisa umsila omde ochanekileyo38, onokuthi uqinisekiswe yiplani yokusabalalisa ukuphakama kwi-inset 2. Ukongezelela, zonke iiprofayili zokuphakama zazilawulwa yi-peak ebukhali 39 (Sku> 3) , ebonisa ukuba igophe Ukwabiwa kobude kuncinci kune-Gaussian bell curve. Umgca obomvu kwiplani yokusabalalisa ukuphakama yi-curve ye-Abbott-Firestone 40, indlela efanelekileyo yezibalo zokuvavanya ukusabalalisa okuqhelekileyo kwedatha. Lo mgca ufunyenwe kwi-cumulative sum phezu kobude be-histogram, apho eyona ncopho iphezulu kunye neyona ndawo inzulu yomkhombe inxulumene nobuncinane (0%) kunye nawona maxabiso aphezulu (100%). Ezi zigophe ze-Abbott-Firestone zinemilo ye-S egudileyo kwi-y-axis kwaye kuzo zonke iimeko zibonisa ukunyuka okuqhubekileyo kwipesenti yezinto ezinqamlezileyo kwindawo egqunyiweyo, ukuqala kwi-roughest kunye neyona ndawo iphakamileyo. Oku kuqinisekisa ubume besithuba somphezulu, ochatshazelwa kakhulu lixesha lokubeka i-nickel.
Itheyibhile 3 idwelisa i-ISO morphology parameters ehambelana nomphezulu ngamnye ofunyenwe kwimifanekiso ye-AFM. Kuyaziwa ukuba umlinganiselo wezinto eziphathekayo (i-Smr) kunye nomlinganiselo we-counter to material ratio (Smc) ziiparamitha ezisebenza phezu komhlaba29. Ngokomzekelo, iziphumo zethu zibonisa ukuba ummandla ongaphezulu kwendiza ye-median yomhlaba uphezulu ngokupheleleyo kuzo zonke iifilimu (Smr = 100%). Nangona kunjalo, amaxabiso e-Smr afunyanwa kwiindawo eziphakamileyo ezahlukeneyo zomlinganiso womhlaba we-terrain41, kuba iparamitha ye-Smc iyaziwa. Ukuziphatha kwe-Smc kuchazwa ngokunyuka koburhabaxa ukusuka kwi-Cu → CuNi20, apho kunokubonwa ukuba ixabiso eliphezulu le-roughness elifunyenwe kwi-CuNi20 linika i-Smc ~ 13 nm, ngelixa ixabiso le-Cu li malunga ne-8 nm.
Iiparamitha zokudibanisa i-RMS gradient (Sdq) kunye nomlinganiselo wendawo yojongano oluphuhlisiweyo (i-Sdr) ziiparamitha ezihambelana nokugutyungelwa kobunzima kunye nobunzima. Ukusuka kwi-Cu → CuNi20, amaxabiso e-Sdq avela kwi-7 ukuya kwi-21, ebonisa ukuba izitenxo ze-topographic kwiifilimu zanda xa i-Ni layer ifakwe kwi-20 min. Kufuneka kuqatshelwe ukuba umphezulu weCuNi20 awukho tyaba njengaleyo yeCu. Ukongezelela, kwafunyaniswa ukuba ixabiso lepharamitha ye-Sdr, ehambelana nobunzima be-surface microtexture, inyuka ukusuka kwi-Cu → CuNi20. Ngokophononongo olwenziwa nguKamble et al.42, ubunzima be-surface microtexture buyanda ngokunyuka kwe-Sdr, ebonisa ukuba i-CuNi20 (Sdr = 945%) ine-microstructure yomhlaba eyinkimbinkimbi xa kuthelekiswa neefilimu ze-Cu (Sdr = 229%). . Enyanisweni, utshintsho kwi-complex ye-microscopic ye-texture idlala indima ephambili ekusasazeni nasekubunjweni kweencopho ezinqabileyo, ezinokubonwa kwiimpawu zeempawu ze-peak density (Spd) kunye ne-arithmetic mean peak curvature (Spc). Kule nkalo, i-Spd inyuka ukusuka kwi-Cu → CuNi20, ebonisa ukuba iincopho zicwangciswe ngokuxineneyo ngokunyuka kwe-Ni layer. Ukongeza, i-Spc iphinda inyuke ukusuka kwi-Cu→CuNi20, ebonisa ukuba i-peak shape ye-surface ye-Cu isampuli ijikelezwe ngakumbi (Spc = 612), ngelixa i-CuNi20 ibukhali (Spc = 925).
Iprofayili erhabaxa yefilimu nganye ikwabonisa iipateni zesithuba kwindawo encochoyi, engundoqo, kunye nemimandla yomkhombe yomphezulu. Umphakamo wombindi (Sk), incopho eyanciphayo (Spk) (ngaphezu kombindi), kunye nomkhombe (Svk) (ezantsi kombindi)31,43 ziiparamitha ezilinganiswe ngokulinganayo kumphezulu weplanethi30 kunye nokwanda ukusuka Cu → CuNi20 ngenxa uburhabaxa bomphezulu Ukwanda okuphawulekayo . Ngokukwanjalo, i-peak material (Vmp), i-core material (Vmc), i-trough void (Vvv), kunye ne-core void volume (Vvc)31 ibonisa indlela efanayo njengoko onke amaxabiso anyuka ukusuka ku-Cu → CuNi20. Oku kuziphatha kubonisa ukuba umphezulu we-CuNi20 unokubamba ulwelo oluninzi kunezinye iisampuli, ezilungileyo, ezibonisa ukuba le ndawo ilula ukuyithambisa i-smear44. Ngoko ke, kufuneka kuqatshelwe ukuba njengoko ubukhulu bomgca we-nickel bukhuphuka ukusuka kwi-CuNi15 → CuNi20, utshintsho kwiprofayili ye-topographic lusalela emva kotshintsho kwi-parameters ye-morphological ephezulu, echaphazela i-microtexture yomhlaba kunye nepateni yendawo yefilimu.
Uvavanyo lomgangatho wemikroskopu yokwakheka komphezulu wefilim lufunyenwe ngokwakha imephu ye-AFM ye-topographic kusetyenziswa isoftware yentengiso yeeMountainsMap45. Ukunikezelwa kuboniswe kuMfanekiso 4, obonisa i-groove emele kunye neploti ye-polar ngokubhekiselele kumphezulu. Itheyibhile yesi-4 idwelisa indawo yokubeka kunye neenketho zesithuba. Imifanekiso yee-grooves ibonisa ukuba isampuli ilawulwa yinkqubo efanayo yeeshaneli kunye ne-homogeneity ecacileyo ye-grooves. Nangona kunjalo, iiparamitha zabo zombini ubunzulu obukhulu bomsele (MDF) kunye nobunzulu obuphakathi (MDEF) bonyuka ukusuka kwi-Cu ukuya kwi-CuNi20, iqinisekisa imigqaliselo yangaphambili malunga nokubanakho ukuthambisa kwe-CuNi20. Kufuneka kuqatshelwe ukuba i-Cu (umzobo 4a) kunye ne-CuNi15 (umzobo 4b) iisampulu zinemilinganiselo efanayo yombala, ebonisa ukuba i-microtexture ye-Cu film surface ayizange itshintshe kakhulu emva kokuba ifilimu ye-Ni ifakwe kwi-15. imiz. Ngokwahlukileyo, isampuli ye-CuNi20 (umzobo 4c) ibonisa imibimbi enemibala eyahlukeneyo, ehambelana nemilinganiselo yayo ephezulu ye-MDF kunye ne-MDEF.
Iigrooves kunye ne-isotropy yomhlaba we-microtextures ye-Cu (a), i-CuNi15 (b), kunye ne-CuNi20 (c) iifilimu.
Umzobo wepolar kwifig. I-4 ibonisa kwakhona ukuba umphezulu we-microtexture wahlukile. Kuyaphawuleka ukuba ukubekwa kwe-Ni layer kuyayitshintsha kakhulu ipatheni yendawo. I-microtextural isotropy ebaliweyo yeesampuli yayingu-48% (Cu), 80% (CuNi15), kunye ne-81% (CuNi20). Kungabonwa ukuba ukubekwa kwe-Ni layer kunegalelo ekwenziweni kwe-isotropic microtexture, ngelixa ifilimu enye ye-Cu ine-anisotropic surface microtexture. Ukongeza, i-spatial frequency frequencies ye-CuNi15 kunye ne-CuNi20 iphantsi ngenxa yobude bayo obukhulu be-autocorrelation (Sal) i-44 xa kuthelekiswa neesampuli ze-Cu. Oku kudityaniswe ne-orientation efanayo yeenkozo eziboniswe ngezi sampuli (Std = 2.5 ° kunye ne-Std = 3.5 °), ngelixa ixabiso elikhulu kakhulu lirekhodwe kwisampuli yeCu (Std = 121 °). Ngokusekwe kwezi ziphumo, zonke iifilim zibonisa ukwahluka kwesithuba okude ngenxa yemo engafaniyo yokwakheka komhlaba, inkangeleko yembonakalo yendawo, kunye noburhabaxa. Ngaloo ndlela, ezi ziphumo zibonisa ukuba ixesha le-Ni layer deposition lidlala indima ebalulekileyo ekubunjweni kwe-CuNi bimetallic sputtered surfaces.
Ukufunda ukuziphatha kwe-LSPR ye-Cu / Ni NPs emoyeni kwindawo yokushisa kwegumbi kunye nakwii-CO ezahlukeneyo zegesi, i-UV-Vis absorption spectra isetyenziswe kwi-wavelength range ye-350-800 nm, njengoko kuboniswe kuMfanekiso 5 weCuNi15 kunye neCuNi20. Ngokuzisa ukuxinana kwegesi ye-CO ehlukeneyo, i-LSPR ye-CuNi15 esebenzayo iya kuba ibanzi, i-absorption iya kuba namandla, kwaye i-peak iya kutshintsha (i-redshift) ukuya kumaza aphezulu, ukusuka kwi-597.5 nm kwi-airflow ukuya kwi-16 L / h 606.0 nm. Ukuhamba kwe-CO kwimizuzwana ye-180, i-606.5 nm, i-CO ihamba nge-16 l / h imizuzwana engama-600. Ngakolunye uhlangothi, i-CuNi20 ibonisa ukuziphatha okwahlukileyo, ngoko ukunyuka kwe-CO gas flow kubangela ukuhla kwe-LSPR peak wavelength position (blueshift) ukusuka kwi-600.0 nm ekuhambeni komoya ukuya kwi-589.5 nm kwi-16 l / h ukuhamba kwe-CO ye-180 s. . I-16 l / h ukuhamba kwe-CO kwimizuzwana engama-600 kwi-589.1 nm. Njengakwi-CuNi15, sinokubona incopho ebanzi kunye nokwanda kokuqina kokufunxa kweCuNi20. Kunokuqikelelwa ukuba ngokunyuka kobunzima be-Ni layer kwi-Cu, kunye nokunyuka kobukhulu kunye nenani le-CuNi20 nanoparticles endaweni ye-CuNi15, i-Cu kunye ne-Ni particles zisondelana, i-amplitude ye-electronic oscillations iyanda. , kwaye, ngenxa yoko, i-frequency iyanda. okuthetha ukuthi: ubude be-waveleng buyancipha, utshintsho oluhlaza okwesibhakabhaka lwenzeka.
Ixesha lokuposa: Aug-16-2023