Zinc telluride (ZnTe), oo ah walax muhiim ah oo ah semiconductor II-VI, ayaa si weyn loogu isticmaalaa ogaanshaha infrared-ka, unugyada qorraxda, iyo aaladaha optoelectronic-ka. Horumarradii ugu dambeeyay ee nanotechnology iyo kiimikada cagaaran ayaa wanaajiyay wax soo saarkeeda. Hoos waxaa ku qoran hababka wax soo saarka ZnTe ee hadda jira iyo xuduudaha muhiimka ah, oo ay ku jiraan hababka dhaqameed iyo horumarinta casriga ah:
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I. Habka Wax Soo Saarka Dhaqanka (Soo Saarista Tooska ah)
1. Diyaarinta Walxaha Cayriin
• Zinc saafi ah (Zn) iyo tellurium (Te): Nadiifnimo ≥99.999% (heerka 5N), oo lagu qasay saamiga molar 1:1.
• Gaaska difaaca: Argon (Ar) ama nitrogen (N₂) oo saafi ah si looga hortago oksaydheynta.
2. Socodka Hawsha
• Tallaabada 1aad: Isku-darka Dhalaalka Faakuumka
o Ku qas budada Zn iyo Te tuubo quartz ah oo u daadi ilaa ≤10⁻³ Pa.
Barnaamijka kuleylinta: Kuleyli 5–10°C/daqiiqo ilaa 500–700°C, hayso 4–6 saacadood.
o Isle'egta falcelinta: Zn+Te→ΔZnTeZn+TeΔZnTe
• Tallaabada 2aad: Ku-buufinta
o Ku rid badeecada cayriin heerkul ah 400–500°C muddo 2–3 saacadood ah si aad u yareyso cilladaha shabagga.
• Tallaabada 3aad: Burburinta iyo Jarjaridda
o Isticmaal mashiinka kubbadda si aad u shiido walxaha badan ilaa cabbirka walxaha la beegsanayo (shidaalka kubbadda ee tamarta sare leh ee loogu talagalay nanoscale).
3. Qodobbada Muhiimka ah
• Saxnaanta xakamaynta heerkulka: ±5°C
• Heerka qaboojinta: 2–5°C/daqiiqo (si looga fogaado dildilaaca kulaylka)
• Cabbirka walxaha ceeriin ah: Zn (100–200 mesh), Te (200–300 mesh)
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II. Habka Casriga ah ee La Hagaajiyay (Habka Xalka Tamarta)
Habka solvothermal-ka waa farsamada ugu weyn ee lagu soo saaro nanoscale ZnTe, iyadoo bixisa faa'iidooyin ay ka mid yihiin cabbirka walxaha la xakameyn karo iyo isticmaalka tamarta oo hooseeya.
1. Qalabka Cayriin iyo Waxyaabaha Dareera
• Hordhacayaasha: Zinc nitrate (Zn(NO₃)₂) iyo sodium tellurite (Na₂TeO₃) ama budada tellurium (Te).
• Waxyaabaha yareeya: Hydrazine hydrate (N₂H₄·H₂O) ama sodium borohydride (NaBH₄).
• Waxyaabaha milma: Ethylenediamine (EDA) ama biyo la dhalaaliyay (biyo DI).
2. Socodka Hawsha
• Tallaabada 1: Kala-dirka Hordhaca ah
o Ku milmi Zn(NO₃)₂ iyo Na₂TeO₃ saamiga molar ee 1:1 ee dareeraha marka la walaaqayo.
• Tallaabada 2: Falcelinta Yaraynta
o Ku dar wakiilka yareeya (tusaale ahaan, N₂H₄·H₂O) oo ku xidh qalab autoclave ah oo cadaadis sare leh.
o Xaaladaha falcelinta:
Heerkulka: 180–220°C
Waqtiga: 12–24 saacadood
Cadaadiska: Iskiis u abuurma (3–5 MPa)
o Isle'egta falgalka: Zn2++TeO32−+Wakiilka yareeya→ZnTe+Alaabada (tusaale ahaan, H₂O, N₂)Zn2++TeO32−+Wakiilka yareeya→ZnTe+Alaabada (tusaale ahaan, H₂O, N₂)
• Tallaabada 3aad: Daaweynta kadib
o Ku shub Centrifuge si aad u kala saarto badeecada, 3–5 jeer ku dhaq ethanol iyo biyo DI ah.
Ku qallaji faakiyuum (60–80°C muddo 4–6 saacadood ah).
3. Qodobbada Muhiimka ah
• Fiirsashada hordhaca ah: 0.1–0.5 mol/L
• xakamaynta pH: 9–11 (xaaladaha alkaline-ka waxay door bidaan falcelinta)
• Xakamaynta cabbirka walxaha: Hagaaji iyada oo loo marayo nooca dareeraha (tusaale ahaan, EDA waxay soo saartaa nanowires; marxaladda biyaha waxay soo saartaa nanoparticles).
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III. Habab Kale oo Horumarsan
1. Kaydinta Uumiga Kiimikada (CVD)
• Adeegsiga: Diyaarinta filim khafiif ah (tusaale ahaan, unugyada qorraxda).
• Hordhacayaasha: Diethylzinc (Zn(C₂H₅)₂) iyo diethyltellurium (Te(C₂H₅)₂).
• Cabbirrada:
Heerkulka dhigista: 350–450°C
o Gaaska side: Isku darka H₂/Ar (heerka socodka: 50–100 sccm)
o Cadaadiska: 10⁻²–10⁻³ Torr
2. Daawaynta Farsamada (Mashiinka Kubbada)
• Astaamaha: Isku-darka dareeraha aan lahayn, heerkul hooseeya.
• Cabbirrada:
o Saamiga kubadda-ilaa-budada: 10:1
Waqtiga shiididda: 20-40 saacadood
o Xawaaraha wareegga: 300–500 rpm
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IV. Xakamaynta Tayada iyo Astaamaha
1. Falanqaynta Nadiifnimada: Kala-soocidda Raajada X-ray (XRD) ee qaab-dhismeedka kiristaalka (meesha ugu sarreysa 2θ ≈25.3°).
2. Xakamaynta qaab-dhismeedka: Mikroskoobka elektaroonigga gudbinta (TEM) ee cabbirka nanoparticle (caadi ahaan: 10-50 nm).
3. Saamiga Elemental: Jaantuska X-ray-ga ee kala firdhisan ee Tamarta-kala-baxa (EDS) ama Jaantuska cufka plasma-ga ee inductively coupled (ICP-MS) si loo xaqiijiyo Zn ≈1:1.
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V. Tixgelinta Badbaadada iyo Deegaanka
1. Daaweynta gaaska qashinka ah: Nuug H₂Te oo leh xalal alkaline ah (tusaale ahaan, NaOH).
2. Soo kabashada dareeraha: Dib u warshadee dareeraha dabiiciga ah (tusaale ahaan, EDA) iyada oo loo marayo sifeynta.
3. Tallaabooyinka ilaalinta: Isticmaal maaskaro gaas ah (ilaalinta H₂Te) iyo galoofisyo u adkaysta daxalka.
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VI. Isbeddellada Tiknoolajiyada
• Isku-darka Cagaaran: Samee nidaamyada wejiga biyaha si loo yareeyo isticmaalka dareeraha dabiiciga ah.
• Wax ka beddelka daawada: Kordhi socodka daawada adigoo isticmaalaya daawada Cu, Ag, iwm.
• Wax soo saar baaxad weyn: Qaado fal-galayaasha socodka joogtada ah si loo gaaro dufcado miisaan-kg ah.
Waqtiga boostada: Maarso-21-2025