Plasmon-Modulated Excitation-Dependent Fluorescence from Activated CTAB Molecules Strongly Coupled to Gold Nanoparticles.
Plasmon-Modulated Excitation-Dependent Fluorescence from Activated CTAB Molecules Strongly Coupled to Gold Nanoparticles.
复制标题
与金纳米粒子强耦合的活化 CTAB 分子产生的等离子体调制激发依赖性荧光
DOI：
10.1038/srep43282
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发表时间：
2017-03-07
影响因子：
4.6
通讯作者：
Wang QQ
中科院分区：
文献类型：
--
作者：
Ding SJ;Nan F;Liu XL;Hao ZH;Zhou L;Zeng J;Xu HX;Zhang W;Wang QQ
依赖于激发的荧光团(EDF)由于具有很高的发光可调整性和从多色图案到生物成像的潜在应用而受到越来越多的关注。在这里，我们报道了在CTAB*EDF和金纳米颗粒(AuNPs)的杂化纳米结构中，由于激子和等离子激子的强烈耦合而产生的具有猝灭浸渍的可调谐荧光。通过调节激发波长、等离子体共振和AuNPs的浓度来调节荧光光谱中的猝灭凹陷。从理论上再现了具有猝灭凹陷的激发相关发射光谱，并揭示了这些光谱是由具有较宽沟道宽度的多能级EDF向等离子体AuNPs的共振能量转移引起的。这些发现为制备EDF分子提供了一种新的方法，并提供了一种通过激子到等离子体的能量转移来调制荧光光谱的策略。
Excitation-dependent fluorophores (EDFs) have been attracted increasing attention owing to their high tunability of emissions and prospective applications ranging from multicolor patterning to bio-imaging. Here, we report tunable fluorescence with quenching dip induced by strong coupling of exciton and plasmon in the hybrid nanostructure of CTAB* EDFs and gold nanoparticles (AuNPs). The quenching dip in the fluorescence spectrum is tuned by adjusting excitation wavelength as well as plasmon resonance and concentration of AuNPs. The observed excitation-dependent emission spectra with quenching dip are theoretically reproduced and revealed to be induced by resonant energy transfer from multilevel EDFs with wider width channels to plasmonic AuNPs. These findings provide a new approach to prepare EDF molecules and a strategy to modulate fluorescence spectrum via exciton-to-plasmon energy transfer.