Abstract
We synthesized uniform CuInS2/ZnS nanocubes by adjusting reaction parameters at the ZnS growth stage. Higher temperature and zinc concentration were shown to drive resultant crystals to have cubic morphology, which could be ascribed to the facet-dependent ligand dynamics on the crystal surface and concomitantly preferred directions of crystal growth. It was found that these nanocubes exhibit sensitive responses, as of photoluminescence quenching, toward hydrogen peroxide, compared to pyramid-shaped nanocrystals. The origin of quenching was further analyzed to be the oxidation of thiolate ligands that leaves the quenching center on the surface. It was noted that the quenched photoluminescence could be fully recovered by introducing additional ligand molecules into the system. Being adopted in the shape-controlled crystal growth, the ligand-to-crystal interaction was shown to still govern the interfacial reaction, the oxidation by hydrogen peroxide, of faceted crystals in our system. It turns out that the reactivity at the crystal surface depends on the exposed facets, especially induced by shape control, and the weak ligand-binding nature of the nanocube renders it vulnerable to the surface reaction.
| Original language | English |
|---|---|
| Pages (from-to) | 32097-32105 |
| Number of pages | 9 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 9 |
| Issue number | 37 |
| DOIs | |
| Publication status | Published - 2017 Sep 20 |
| Externally published | Yes |
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Keywords
- crystal/ligand interface
- CuInS/ZnS nanocrystals
- photoluminescence
- shape control
- surface chemistry
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Controlled Synthesis of CuInS2/ZnS Nanocubes and Their Sensitive Photoluminescence Response toward Hydrogen Peroxide. / Kim, Youngsun; Jang, Ho Seong; Kim, Hyunki; Kim, Sehoon; Jeon, Duk Young.
In: ACS Applied Materials and Interfaces, Vol. 9, No. 37, 20.09.2017, p. 32097-32105.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Controlled Synthesis of CuInS2/ZnS Nanocubes and Their Sensitive Photoluminescence Response toward Hydrogen Peroxide
AU - Kim, Youngsun
AU - Jang, Ho Seong
AU - Kim, Hyunki
AU - Kim, Sehoon
AU - Jeon, Duk Young
PY - 2017/9/20
Y1 - 2017/9/20
N2 - We synthesized uniform CuInS2/ZnS nanocubes by adjusting reaction parameters at the ZnS growth stage. Higher temperature and zinc concentration were shown to drive resultant crystals to have cubic morphology, which could be ascribed to the facet-dependent ligand dynamics on the crystal surface and concomitantly preferred directions of crystal growth. It was found that these nanocubes exhibit sensitive responses, as of photoluminescence quenching, toward hydrogen peroxide, compared to pyramid-shaped nanocrystals. The origin of quenching was further analyzed to be the oxidation of thiolate ligands that leaves the quenching center on the surface. It was noted that the quenched photoluminescence could be fully recovered by introducing additional ligand molecules into the system. Being adopted in the shape-controlled crystal growth, the ligand-to-crystal interaction was shown to still govern the interfacial reaction, the oxidation by hydrogen peroxide, of faceted crystals in our system. It turns out that the reactivity at the crystal surface depends on the exposed facets, especially induced by shape control, and the weak ligand-binding nature of the nanocube renders it vulnerable to the surface reaction.
AB - We synthesized uniform CuInS2/ZnS nanocubes by adjusting reaction parameters at the ZnS growth stage. Higher temperature and zinc concentration were shown to drive resultant crystals to have cubic morphology, which could be ascribed to the facet-dependent ligand dynamics on the crystal surface and concomitantly preferred directions of crystal growth. It was found that these nanocubes exhibit sensitive responses, as of photoluminescence quenching, toward hydrogen peroxide, compared to pyramid-shaped nanocrystals. The origin of quenching was further analyzed to be the oxidation of thiolate ligands that leaves the quenching center on the surface. It was noted that the quenched photoluminescence could be fully recovered by introducing additional ligand molecules into the system. Being adopted in the shape-controlled crystal growth, the ligand-to-crystal interaction was shown to still govern the interfacial reaction, the oxidation by hydrogen peroxide, of faceted crystals in our system. It turns out that the reactivity at the crystal surface depends on the exposed facets, especially induced by shape control, and the weak ligand-binding nature of the nanocube renders it vulnerable to the surface reaction.
KW - crystal/ligand interface
KW - CuInS/ZnS nanocrystals
KW - photoluminescence
KW - shape control
KW - surface chemistry
UR - http://www.scopus.com/inward/record.url?scp=85029703259&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029703259&partnerID=8YFLogxK
U2 - 10.1021/acsami.7b09388
DO - 10.1021/acsami.7b09388
M3 - Article
C2 - 28846371
AN - SCOPUS:85029703259
VL - 9
SP - 32097
EP - 32105
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 37
ER -