Major Electronic Transition Shift from Bandgap to Localized Surface Plasmon Resonance in CdxHg1–xSe Alloy Nanocrystals
作者： K.-S. Jeong D.-S. Choi , B.-N. Yoon , Kim , D.-K. Kim , H.-S
DOI: 10.1021/ACS.CHEMMATER.7B03813
关键词: Crystal growth 、 Quantum dot 、 Materials science 、 Surface plasmon resonance 、 Nanotechnology 、 Chemical physics 、 Localized surface plasmon 、 Molecular electronic transition 、 Band gap 、 Nanocrystal 、 Exciton
摘要: CdxHg1–xSe alloy nanocrystals are obtained from CdSe semiconductor via cation exchange. By varying the composition during exchange process, offer a widely tunable electronic transition visible to NIR and even mid-IR range. The bandgap of colloidal quantum dot gradually red-shifts near-IR with addition Hg precursor, then steady-state intraband (or intersub-band) appears. Finally, as electron density is increased by successive metal localized surface plasmon resonances (LSPRs) appear major in regime. shift LSPRs infers that exciton spatially moves inside nanocrystal through change further crystal growth. corresponding variance nanocrystals’ structural, compositional, ...
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