Abstract
Composition variation and formation of core/shell heterostructures have allowed the extension and applicability of size-tunable optical properties of colloidal semiconductor nanocrystals. Anisotropic shapes such as nanorods (NRs) provide new and further refined properties but relatively simple and empowering approaches such as alloying and controlled heterostructure formation are much more challenging to apply to these materials. Here, we start from a well-defined CdS/CdSe barbell-shaped NR heterostructure and perform sequential cation exchanges first with Cu and then with Cd/Zn under relatively mild conditions to achieve alloying while preserving the structure. By using a mixture of Cd and Zn in the presence of a thiol, controllable amounts of alloying in both components could be achieved. Growth of a final ZnSe shell enhances the photoluminescence and allows the creation of a series of double-heterojunction NRs with emission spanning the visible spectral range.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 9307-9316 |
| Number of pages | 10 |
| Journal | Chemistry of Materials |
| Volume | 31 |
| Issue number | 22 |
| DOIs | |
| State | Published - Nov 26 2019 |
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ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry
Cite this
Extending the Spectral Range of Double-Heterojunction Nanorods by Cation Exchange-Induced Alloying. / Flanagan, Joseph C.; Keating, Logan P.; Kalasad, Muttanagoud N.; Shim, Moonsub.
In: Chemistry of Materials, Vol. 31, No. 22, 26.11.2019, p. 9307-9316.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Extending the Spectral Range of Double-Heterojunction Nanorods by Cation Exchange-Induced Alloying
AU - Flanagan, Joseph C.
AU - Keating, Logan P.
AU - Kalasad, Muttanagoud N.
AU - Shim, Moonsub
PY - 2019/11/26
Y1 - 2019/11/26
N2 - Composition variation and formation of core/shell heterostructures have allowed the extension and applicability of size-tunable optical properties of colloidal semiconductor nanocrystals. Anisotropic shapes such as nanorods (NRs) provide new and further refined properties but relatively simple and empowering approaches such as alloying and controlled heterostructure formation are much more challenging to apply to these materials. Here, we start from a well-defined CdS/CdSe barbell-shaped NR heterostructure and perform sequential cation exchanges first with Cu and then with Cd/Zn under relatively mild conditions to achieve alloying while preserving the structure. By using a mixture of Cd and Zn in the presence of a thiol, controllable amounts of alloying in both components could be achieved. Growth of a final ZnSe shell enhances the photoluminescence and allows the creation of a series of double-heterojunction NRs with emission spanning the visible spectral range.
AB - Composition variation and formation of core/shell heterostructures have allowed the extension and applicability of size-tunable optical properties of colloidal semiconductor nanocrystals. Anisotropic shapes such as nanorods (NRs) provide new and further refined properties but relatively simple and empowering approaches such as alloying and controlled heterostructure formation are much more challenging to apply to these materials. Here, we start from a well-defined CdS/CdSe barbell-shaped NR heterostructure and perform sequential cation exchanges first with Cu and then with Cd/Zn under relatively mild conditions to achieve alloying while preserving the structure. By using a mixture of Cd and Zn in the presence of a thiol, controllable amounts of alloying in both components could be achieved. Growth of a final ZnSe shell enhances the photoluminescence and allows the creation of a series of double-heterojunction NRs with emission spanning the visible spectral range.
UR - http://www.scopus.com/inward/record.url?scp=85075149059&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85075149059&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.9b02615
DO - 10.1021/acs.chemmater.9b02615
M3 - Article
AN - SCOPUS:85075149059
VL - 31
SP - 9307
EP - 9316
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 22
ER -