Molecularly Tunable Fluorescent Quantum Defects
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- 作者：Hyejin Kwon ; Al’ona Furmanchuk ; Mijin Kim ; Brendan Meany ; Yong Guo ; George C. Schatz ; YuHuang Wang
- 刊名：Journal of the American Chemical Society
- 出版年：2016
- 出版时间：June 1, 2016
- 年：2016
- 卷：138
- 期：21
- 页码：6878-6885
- 全文大小：562K
- 年卷期：0
- ISSN：1520-5126
文摘
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.