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<p>A nanocrystal-molecule complex composed of CdSe donor and Rhodamine B (RhB) acceptor is prepared to investigate the effect of accepter-donor ratio on the Förster resonance energy transfer (FRET) process. To highlight the FRET process, the energy level alignment between CdSe and RhB is purposefully designed and CdSe nanocrystal is coated with a wide band gap ZnS shell. The carrier dynamics is observed via combined spectral analysis. The results reveal clear FRET process between the CdSe donor and RhB acceptor. The FRET is enhanced by increasing RhB/CdSe ratio and a gradual saturation will be present at high RhB concentration.</p>

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Acceptor concentration dependent Förster resonance energy transfer in nanocrystal-molecule complexes revealed by spectral analysis

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Rongxin Zhang,
  • Zixiang Zhou,
  • Lei Wang,
  • Xin Zhang,
  • Ying Liang,
  • Guijie Liang

摘要

A nanocrystal-molecule complex composed of CdSe donor and Rhodamine B (RhB) acceptor is prepared to investigate the effect of accepter-donor ratio on the Förster resonance energy transfer (FRET) process. To highlight the FRET process, the energy level alignment between CdSe and RhB is purposefully designed and CdSe nanocrystal is coated with a wide band gap ZnS shell. The carrier dynamics is observed via combined spectral analysis. The results reveal clear FRET process between the CdSe donor and RhB acceptor. The FRET is enhanced by increasing RhB/CdSe ratio and a gradual saturation will be present at high RhB concentration.