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A symmetrical bi-electrode electrochemical technique for high-efficiency transfer of CVD-grown graphene

机译：对称双电极电化学技术可高效转移CVD生长的石墨烯

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摘要

Graphene transfer is a critical process in the journey from CVD-grown graphene to device application. The current transfer techniques use a chemical-etching method to oxidize the metal catalyst, which is heavily time-consuming and involves a high material cost. In this study, a highly efficient symmetrical bi-electrode technique has been developed to simultaneously delaminate the CVD-grown graphene from the metal catalyst at both the anode and cathode of the electrolytic cell. Raman spectra, UV-visible transmittance, and four-probe measurements confirm that this transfer process is nondestructive and can produce similar electrical properties to those produced by the conventional metal-etching transfer method. This bi-electrode transfer technique possesses the advantages of high efficiency, recyclable use of metal catalyst, and high electrical conductivity, and it can be potentially applied for industrial applications.
机译：石墨烯转移是从CVD生长的石墨烯到设备应用的关键过程。当前的转移技术使用化学蚀刻方法来氧化金属催化剂，这是非常耗时的并且涉及高的材料成本。在这项研究中，已开发出一种高效的对称双电极技术，可同时从电解池的阳极和阴极处的金属催化剂中剥离CVD生长的石墨烯。拉曼光谱，紫外-可见光透射率和四探针测量结果证实，该转移过程无损，并且可以产生与常规金属蚀刻转移方法相似的电性能。这种双电极转移技术具有效率高，金属催化剂可回收利用和导电率高的优点，并且可以潜在地用于工业应用。

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