期刊
CHEMISTRY OF MATERIALS
卷 30, 期 14, 页码 4675-4682出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.8b01333
关键词
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资金
- National Science Foundation (NSF) [DMR-1507810]
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSF ECCS-1542205]
- MRSEC program at the Materials Research Center [NSF DMR-1720139]
- International Institute for Nanotechnology (IIN)
- Keck Foundation
- State of Illinois, through the IIN
- National Science Foundation Graduate Research Fellowship Program (NSF-GRFP)
Core@shell architectures provide a rich platform for designing new geometries composed of various functional nanomaterials. Recent work has shown that Au@MoS2 core@shell structures exhibit strong light matter interactions and promising optoelectronic device performance. However, the role of the core on Au@MoS2 growth dynamics is not well understood, leaving the question of if this unusual structure is extendable to other materials systems unanswered. Herein, we present unambiguous evidence of MoS2 encapsulation of new crystalline and even noncrystalline core materials, including Ag and silica. High-resolution transmission electron microscopy shows intimate contact between each core material and their highly crystalline, conformal MoS2 shells. We propose a generalized growth mechanism for these structures, which is supported by density functional theory energy calculations and implies wider applicability of transition metal dichalcogenide encapsulation to other functional nanoparticles. Further, we demonstrate useful methodology to achieve distinct optical responses, as reflected in the photoluminescence measurements and by discrete dipole approximation calculations. By exploring the role of the core material on synthesis and properties in this architectural platform, we introduce a multiplexed nanoparticle@MoS2 paradigm with numerous viable avenues for future structural and property investigation.
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