Molecularly Tunable Fluorescent Quantum Defects.
Molecularly Tunable Fluorescent Quantum Defects.
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DOI：
10.1021/jacs.6b03618
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发表时间：
2016-06-01
影响因子：
15
通讯作者：
Wang Y
中科院分区：
文献类型：
--
作者：
Kwon H;Furmanchuk A;Kim M;Meany B;Guo Y;Schatz GC;Wang Y
我们描述了通过本身不发光的共价键合表面官能团在半导体碳纳米管中化学产生分子可调荧光量子缺陷。通过表面官能团的变化，相同的碳纳米管晶体被化学转化，产生 30 多种不同的荧光纳米结构，具有独特的近红外光致发光，这种光致发光是分子特异性的、系统可调的，并且比母体半导体更亮。这种新颖的激子剪裁化学很容易在水溶液中发生，并在 sp2 碳晶格上产生功能缺陷，并且几乎任何含碘烃前体都具有高度可预测的 C-C 键合。我们通过单一表面官能团控制纳米结构激子的新能力为碳纳米材料的合成后化学工程开辟了令人兴奋的可能性，并表明现在可以预期合理设计和创建多种分子可调谐量子发射器，其应用范围从体内生物成像和化学传感到室温单光子源。
We describe the chemical creation of molecularly tunable fluorescent quantum defects in semiconducting carbon nanotubes through covalently bonded surface functional groups that are themselves nonemitting. By variation of the surface functional groups, the same carbon nanotube crystal is chemically converted to create more than 30 distinct fluorescent nanostructures with unique near-infrared photoluminescence that is molecularly specific, systematically tunable, and significantly brighter than that of the parent semiconductor. This novel exciton-tailoring chemistry readily occurs in aqueous solution and creates functional defects on the sp2 carbon lattice with highly predictable C–C bonding from virtually any iodine-containing hydrocarbon precursor. Our new ability to control nanostructure excitons through a single surface functional group opens up exciting possibilities for postsynthesis chemical engineering of carbon nanomaterials and suggests that the rational design and creation of a large variety of molecularly tunable quantum emitters—for applications ranging from in vivo bioimaging and chemical sensing to room-temperature single-photon sources—can now be anticipated.