用石墨烯量子点包覆纳米颗粒以增强热电性能。
Capping nanoparticles with graphene quantum dots for enhanced thermoelectric performance.
作者信息
Liang Yuantong, Lu Chenguang, Ding Defang, Zhao Man, Wang Dawei, Hu Chao, Qiu Jieshan, Xie Gang, Tang Zhiyong
机构信息
CAS Key Lab for Nanosystem and Hierarchy Fabrication , National Center for Nanoscience and Technology , Beijing , 100190 , China . Email:
Key Laboratory of Synthesis and Natural Functional Molecular Chemistry of Ministry of Education , College of Chemistry & Materials Science , Northwest University , Xi'an , 710069 , China . Email:
出版信息
Chem Sci. 2015 Jul 15;6(7):4103-4108. doi: 10.1039/c5sc00910c. Epub 2015 Apr 13.
Graphene quantum dots (GQDs) are shown to serve as phase transfer agents to transfer various types of nanoparticles (NPs) from non-polar to polar solvents. Thorough characterization of the NPs proves complete native ligand exchange. Pellets of this GQD-NP composite show that the GQDs limit the crystal size during spark plasma sintering, yielding enhanced thermoelectric performance compared with NPs exchanged with inorganic ions. A photoluminescence study of the GQD-NP composite also suggests energy transfer from GQDs to NPs.
石墨烯量子点（GQDs）被证明可作为相转移剂，将各种类型的纳米颗粒（NPs）从非极性溶剂转移到极性溶剂中。对纳米颗粒的全面表征证明了完全的天然配体交换。这种GQD-NP复合材料的颗粒表明，在火花等离子体烧结过程中，石墨烯量子点限制了晶体尺寸，与用无机离子交换的纳米颗粒相比，产生了增强的热电性能。对GQD-NP复合材料的光致发光研究还表明存在从石墨烯量子点到纳米颗粒的能量转移。
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