文献类型：期刊文献

英文题名：Vertical-Graphene-Assisted Chemical Vapor Deposition for Fast Growth of Macroscaled Graphene Grains

作者：Cai, Xiao[1,2];Wen, Shuang[1,2];Lv, Binghao[1,2];Dou, Wei-Dong[1,2]

机构：[1]Shaoxing Univ, Lab Lowdimens Carbon Mat, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2023

卷号：127

期号：14

起止页码：6991

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：SCI-EXPANDED(收录号：WOS:000968197500001)、、EI(收录号：20231513883257)、Scopus(收录号：2-s2.0-85152208605)、WOS

基金：? ACKNOWLEDGMENTS The work described in this paper was supported by grants from the Natural Science Foundation of Zhejiang Province (no. LY19F040005) .

语种：英文

外文关键词：Chemical vapor deposition - Growth rate - Nucleation

外文摘要：Fast growth of macroscaled single-layered graphene (MSLG) is crucial for massive fabrication of graphene with the chemical vapor deposition (CVD) method. The conventional CVD process of MSLG fabrication is time-consuming since the dosage rate of carbon precursors such as methane is usually very low in order to decrease the nucleation density of graphene grains. A few and even over 10 h are usually needed to grow graphene grains with a macroscale. Simply increasing the flow rate of the carbon precursor results in the increase of nucleation density of graphene grains, which in turn leads to a sharp decrease of the graphene grain size. Here, we report a modified CVD method which substantially accelerates the growth rate of graphene without increasing the nucleation density of graphene grains. Ceramic plates and defect-rich vertical graphene are used synergistically to assist the growth of MSLG. The ceramic plate acts as a persistent oxygen supplement which constrains the nucleation density of graphene grains, while defect-rich vertical graphene serves as complementary catalysis which can accelerate the growth speed of graphene grains. Only a few minutes are needed for the growth of millimeter-sized graphene grains with this modified CVD method.