Acid selenites as new selenium precursor for CdSe quantum dot synthesis
Chemical precursors for nanomaterials synthesis have become essential to tune particle size, composition, morphology, and unique properties. New inexpensive precursors investigation that precisely controls these characteristics is highly relevant. We studied new Se precursors, the acid selenites (R–...
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| Language: | English |
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Elsevier
2024-01-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023110450 |
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| author | João B. Souza Junior Beatriz Mouriño Marcelo H. Gehlen Daniel A. Moraes Jefferson Bettini Laudemir C. Varanda |
| author_facet | João B. Souza Junior Beatriz Mouriño Marcelo H. Gehlen Daniel A. Moraes Jefferson Bettini Laudemir C. Varanda |
| author_sort | João B. Souza Junior |
| collection | DOAJ |
| description | Chemical precursors for nanomaterials synthesis have become essential to tune particle size, composition, morphology, and unique properties. New inexpensive precursors investigation that precisely controls these characteristics is highly relevant. We studied new Se precursors, the acid selenites (R–O–SeOOH), to synthesize CdSe quantum dots (QDs). They were produced at room temperature by the Image 1 reaction with alcohols having different alkyl chains and were characterized by 1H NMR confirming their structures. This unprecedented precursor generates high-quality CdSe nanocrystals with narrow size distribution in the zinc-blend structure showing controlled optical properties. Advanced characterization detailed the CdSe structure showing stacking fault defects and its dependence on the used R–O–SeOOH. The QDs formation was examined using a time-dependent growth kinetics model. Differences in the nanoparticle surface structure influenced the optical properties, and they were correlated to the Se-precursor nature. Small alkyl chain acid selenites generally lead to more controlled QDs morphology, while the bigger alkyl chain leads to slightly upper quantum yields. Acid selenites can potentially replace Se-precursors at competitive costs in the metallic chalcogenide nanoparticles. Image 1 is chemically stable, and alcohols are cheap and less toxic than the reactants used today, making acid selenites a more sustainable Se precursor. |
| first_indexed | 2024-03-08T09:02:44Z |
| format | Article |
| id | doaj.art-a81410db9b6d4ac7bfcaf1f828ef2558 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-08T09:02:44Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-a81410db9b6d4ac7bfcaf1f828ef25582024-02-01T06:33:44ZengElsevierHeliyon2405-84402024-01-01101e23837Acid selenites as new selenium precursor for CdSe quantum dot synthesisJoão B. Souza Junior0Beatriz Mouriño1Marcelo H. Gehlen2Daniel A. Moraes3Jefferson Bettini4Laudemir C. Varanda5Colloidal Materials Group, Physical-Chemistry Department, Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos - SP, Brazil; Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas - SP, Brazil; Corresponding author at: Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas - SP, Brazil.Colloidal Materials Group, Physical-Chemistry Department, Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos - SP, BrazilColloidal Materials Group, Physical-Chemistry Department, Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos - SP, BrazilColloidal Materials Group, Physical-Chemistry Department, Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos - SP, Brazil; Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas - SP, BrazilBrazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas - SP, BrazilColloidal Materials Group, Physical-Chemistry Department, Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos - SP, Brazil; Corresponding author at: Colloidal Materials Group, Physical-Chemistry Department, Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos - SP, Brazil.Chemical precursors for nanomaterials synthesis have become essential to tune particle size, composition, morphology, and unique properties. New inexpensive precursors investigation that precisely controls these characteristics is highly relevant. We studied new Se precursors, the acid selenites (R–O–SeOOH), to synthesize CdSe quantum dots (QDs). They were produced at room temperature by the Image 1 reaction with alcohols having different alkyl chains and were characterized by 1H NMR confirming their structures. This unprecedented precursor generates high-quality CdSe nanocrystals with narrow size distribution in the zinc-blend structure showing controlled optical properties. Advanced characterization detailed the CdSe structure showing stacking fault defects and its dependence on the used R–O–SeOOH. The QDs formation was examined using a time-dependent growth kinetics model. Differences in the nanoparticle surface structure influenced the optical properties, and they were correlated to the Se-precursor nature. Small alkyl chain acid selenites generally lead to more controlled QDs morphology, while the bigger alkyl chain leads to slightly upper quantum yields. Acid selenites can potentially replace Se-precursors at competitive costs in the metallic chalcogenide nanoparticles. Image 1 is chemically stable, and alcohols are cheap and less toxic than the reactants used today, making acid selenites a more sustainable Se precursor.http://www.sciencedirect.com/science/article/pii/S2405844023110450Acid selenitesCdSeQuantum dotsColloidal synthesis |
| spellingShingle | João B. Souza Junior Beatriz Mouriño Marcelo H. Gehlen Daniel A. Moraes Jefferson Bettini Laudemir C. Varanda Acid selenites as new selenium precursor for CdSe quantum dot synthesis Heliyon Acid selenites CdSe Quantum dots Colloidal synthesis |
| title | Acid selenites as new selenium precursor for CdSe quantum dot synthesis |
| title_full | Acid selenites as new selenium precursor for CdSe quantum dot synthesis |
| title_fullStr | Acid selenites as new selenium precursor for CdSe quantum dot synthesis |
| title_full_unstemmed | Acid selenites as new selenium precursor for CdSe quantum dot synthesis |
| title_short | Acid selenites as new selenium precursor for CdSe quantum dot synthesis |
| title_sort | acid selenites as new selenium precursor for cdse quantum dot synthesis |
| topic | Acid selenites CdSe Quantum dots Colloidal synthesis |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023110450 |
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