Cu2+ cation-exchange in ZnxCd1-xS thin films for neuromorphic devices

Boratto, Miguel H.; Linhares, A. A.; Congiu, Mirko; Batagin‐Neto, Augusto; Pla-Cid, Cristiani C.; Pasa, André A.; Graeff, Carlos Frederico de Oliveira

doi:10.1016/j.apsusc.2020.147921

Cited by 5 publications

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“…Considering the hard and soft acid and base theory, the smaller the value of Δs, the more effective and stronger the interaction between the two substances. 42 Zn 2+ , Bi 3+ , and Cd 2+ showed Δs values 1 order of magnitude smaller than that of Cu + in interactions with Cl − , indicating a possible cation exchange reaction. Note that the dissociation of metal ion from each metal−ligand complex (Figure S5) is considered plausible prior to the cation exchange reaction as indicated by the higher Δs value compared to that of each metal ion−Cl − interaction.…”

Section: ■ Results and Discussionmentioning

confidence: 90%

“…The differences in local softness (Δ s = | s + – s – |) between the four cations (Cu + , Zn 2+ , Bi 3+ , and Cd 2+ ) and the two anions (oleate anion and Cl – ), which correspond to metal–ligand structure and Cs 3 Cu 2 Cl 5 , respectively, are presented in Figure c. Considering the hard and soft acid and base theory, the smaller the value of Δ s , the more effective and stronger the interaction between the two substances . Zn 2+ , Bi 3+ , and Cd 2+ showed Δ s values 1 order of magnitude smaller than that of Cu + in interactions with Cl – , indicating a possible cation exchange reaction.…”

Section: Resultsmentioning

confidence: 99%

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Phase Transformation of Colloidal Cs₃Cu₂Cl₅ Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

et al. 2023

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We present the phase transformation from colloidal Cs 3 Cu 2 Cl 5 nanocrystals to CsMCl (M = Zn, Bi, Cd) by cation exchange reaction. Cs 2 ZnCl 4 , Cs 3 BiCl 6 , and CsCdCl 3 were successfully synthesized, and the feasibility of phase transformations was demonstrated using density functional theory calculations, which revealed the high thermodynamic stability of the three structures.The results indicate that these structures can be synthetically prepared. The difference in reactivity between Zn, Bi, and Cd cations, which was verified by changing the reaction temperatures, was demonstrated using chemical softness calculations considering the interactions between Cl − and three cations. Additionally, for each cation exchange reaction, thermodynamic stability, estimated in terms of the formation energy, contributed to reactivity. The Cs 2 ZnCl 4 structure required the mildest reaction condition (i.e., 110 °C). As a reverse reaction, Cu cations were added to solutions of Cs 2 ZnCl 4 , Cs 3 BiCl 6 , and CsCdCl 3 , and CsCu 2 Cl 3 was obtained instead of Cs 3 Cu 2 Cl 5 . The mechanism was not cation exchange, and transmission electron microscopy data showed that nanoparticles were used as precursors for forming CsCu 2 Cl 3 particles.

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Section: ■ Results and Discussionmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Phase Transformation of Colloidal Cs₃Cu₂Cl₅ Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

et al. 2023

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Anomalous diode behavior of Cu2S/SnO2 p–n junction

Lima

Santos

Silva

et al. 2021

J Mater Sci: Mater Electron

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Bi-doped twin crystal Zn0.5Cd0.5S photocatalyst for highly efficient photocatalytic hydrogen production from water

Yang

Chen

Líu

et al. 2023

Applied Surface Science

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Cu2+ cation-exchange in ZnxCd1-xS thin films for neuromorphic devices

Cited by 5 publications

References 22 publications

Phase Transformation of Colloidal Cs₃Cu₂Cl₅ Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

Phase Transformation of Colloidal Cs₃Cu₂Cl₅ Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

Anomalous diode behavior of Cu2S/SnO2 p–n junction

Bi-doped twin crystal Zn0.5Cd0.5S photocatalyst for highly efficient photocatalytic hydrogen production from water

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Cu2+ cation-exchange in ZnxCd1-xS thin films for neuromorphic devices

Cited by 5 publications

References 22 publications

Phase Transformation of Colloidal Cs3Cu2Cl5 Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

Phase Transformation of Colloidal Cs3Cu2Cl5 Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

Anomalous diode behavior of Cu2S/SnO2 p–n junction

Bi-doped twin crystal Zn0.5Cd0.5S photocatalyst for highly efficient photocatalytic hydrogen production from water

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Product

Resources

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Phase Transformation of Colloidal Cs₃Cu₂Cl₅ Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations

Phase Transformation of Colloidal Cs₃Cu₂Cl₅ Nanocrystals to CsMCl (M = Zn, Bi, Cd) by Cation Exchange and Their Thermodynamic Study by Density Functional Theory Calculations