Photochemical Creation of Fluorescent Quantum Defects in Semiconducting Carbon Nanotube Hosts.
Photochemical Creation of Fluorescent Quantum Defects in Semiconducting Carbon Nanotube Hosts.
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DOI：
10.1002/anie.201709626
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发表时间：
2018-01
影响因子：
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通讯作者：
Xiaojian Wu;Mijin Kim;H. Kwon;YuHuang Wang
中科院分区：
文献类型：
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作者：
Xiaojian Wu;Mijin Kim;H. Kwon;YuHuang Wang
量子缺陷是一类新兴的合成单光子发射体，在近红外成像、化学传感、材料工程和量子信息处理方面具有巨大的潜力。在这里，我们表明，它是可能的光学直接合成创建的分子可调荧光量子缺陷在半导体单壁碳纳米管主机通过光化学反应。通过激发与其电子跃迁共振的光的主机半导体，我们发现，含卤素的芳基基团可以共价键合到sp2碳晶格。引入的量子缺陷产生明亮的光致发光，允许原位跟踪反应进程。我们表明，该反应是独立的温度，但强烈相关的光子能量用于驱动反应，这表明光化学机制，而不是光热效应。这种类型的光化学反应打开了使用光控制荧光量子缺陷的合成的可能性，并且可以实现具有电子和分子精度的量子发射体的光刻图案化。
Quantum defects are an emerging class of synthetic single-photon emitters that hold vast potential for near-infrared imaging, chemical sensing, materials engineering, and quantum information processing. Herein, we show that it is possible to optically direct the synthetic creation of molecularly tunable fluorescent quantum defects in semiconducting single-walled carbon nanotube hosts through photochemical reactions. By exciting the host semiconductor with light that resonates with its electronic transition, we find that halide-containing aryl groups can covalently bond to the sp2 carbon lattice. The introduced quantum defects generate bright photoluminescence that allows tracking of the reaction progress in situ. We show that the reaction is independent of temperature but correlates strongly with the photon energy used to drive the reaction, suggesting a photochemical mechanism rather than photothermal effects. This type of photochemical reactions opens the possibility to control the synthesis of fluorescent quantum defects using light and may enable lithographic patterning of quantum emitters with electronic and molecular precision.