期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 119, 期 19, 页码 10734-10739出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b01897
关键词
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资金
- Israeli Centers of Research Excellence (I-CORE) program [152/11]
- ISF [475/12]
- Adelis Fund
The new 2D colloidal semiconductor ultrathin nanosheets provide an appealing combination of properties. Controlling both their morphology and composition offers another path to control their physical properties. Homogeneously alloyed structures with tunable properties were obtained using NaBH4 which controls the precursor reactivity. The effect of NaBH4 on the degree of alloying, shape control, and optical properties of the alloyed colloidal nanosheets is presented here. The alloyed structures are a monolayer thicker than the pure CdS or CdSe. In relatively low Se contents, the addition of NaBH4 produced high quality alloyed nanosheets that are uniform, in the wurtzite phase and with small thickness distribution as evident from transmission electron microscopy (TEM), X-ray diffraction (XRD), and optical characterization. Atomic resolution phase images provide evidence to both stacking faults formation across the entire width of the sheet as well as local disorder, suggesting a combined mechanism of oriented attachment of patches that are fused and extended by unidirectional growth.
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