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Single Enzyme Direct Biomineralization of CdSe and CdSe-CdS Core-Shell Quantum Dots.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yang, Zhou Kiely, Christopher J. Berger, Bryan W. McIntosh, Steven C. |
| Copyright Year | 2017 |
| Abstract | Biomineralization is the process by which biological systems synthesize inorganic materials. Herein, we demonstrate an engineered cystathionine γ-lyase enzyme, smCSE that is active for the direct aqueous phase biomineralization of CdSe and CdSe-CdS core-shell nanocrystals. The nanocrystals are formed in an otherwise unreactive buffered solution of Cd acetate and selenocystine through enzymatic turnover of the selenocystine to form a reactive precursor, likely H2Se. The particle size of the CdSe core nanocrystals can be tuned by varying the incubation time to generated particle sizes between 2.74 ± 0.63 nm and 4.78 ± 1.16 nm formed after 20 min and 24 h of incubation, respectively. Subsequent purification and introduction of l-cysteine as a sulfur source facilitates the biomineralization of a CdS shell onto the CdSe cores. The quantum yield of the resulting CdSe-CdS core-shell particles is up to 12% in the aqueous phase; comparable to that reported for more traditional chemical synthesis routes for core-shell particles of similar size with similar shell coverage. This single-enzyme route to functional nanocrystals synthesis reveals the powerful potential of biomineralization processes. |
| Starting Page | 13430 |
| Ending Page | 13439 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/acsami.7b00133 |
| PubMed reference number | 28358193 |
| Journal | Medline |
| Volume Number | 9 |
| Issue Number | 15 |
| Alternate Webpage(s) | http://orca-mwe.cf.ac.uk/107225/1/acsami.7b00133_SM.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/acsami.7b00133 |
| Journal | ACS applied materials & interfaces |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
