Graphene Research Centre, Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 (Singapore); NUS Graduate School for Integrative Sciences and Engineering, Centre for Life Sciences #05-01, 28 Medical Drive, Singapore 117456 (Singapore).
Angew Chem Int Ed Engl. 2014 Jan 3;53(1):215-9. doi: 10.1002/anie.201308682. Epub 2013 Nov 20.
Using IR spectroscopy, high-pressure reactions of molecules were observed in liquids entrapped by graphene nanobubbles formed at the graphene-diamond interface. Nanobubbles formed on graphene as a result of thermally induced bonding of its edges with diamond are highly impermeable, thus providing a good sealing of solvents within. Owing to the optical transparency of graphene and diamond, high-pressure chemical reactions within the bubbles can be probed with vibrational spectroscopy. By monitoring the conformational changes of pressure-sensitive molecules, the pressure within the nanobubble can be calibrated as a function of temperature and it is about 1 GPa at 600 K. The polymerization of buckministerfullerene (C60 ), which is symmetrically forbidden under ambient conditions, is observed to proceed in well-defined stages in the pressurized nanobubbles.
利用红外光谱技术，在石墨烯-金刚石界面形成的石墨烯纳米气泡中观察到了被包裹在其中的液体中的高压分子反应。由于石墨烯边缘与金刚石之间的热诱导键合形成了纳米气泡，这些气泡具有极高的不渗透性，从而有效地将溶剂密封在内部。由于石墨烯和金刚石具有光学透明性，因此可以通过振动光谱来探测气泡内的高压化学反应。通过监测压力敏感分子的构象变化，可以将纳米气泡内的压力校准为温度的函数，在 600 K 时约为 1 GPa。在加压纳米气泡中，观察到在环境条件下对称禁止的 buckminsterfullerene（C60）聚合反应按明确的阶段进行。
