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| 1 | Friction characteristics of mechanically exfoliated and CVD-grown single-layer MoS_2显示文摘In this work, the friction characteristics of single-layer MoS_2 prepared with chemical vapor deposition(CVD) at three different temperatures were quantitatively investigated and compared to those of single-layer MoS_2 prepared using mechanical exfoliation. The surface and crystalline qualities of the MoS_2 specimens were characterized using an optical microscope, atomic force microscope(AFM), and Raman spectroscopy. The surfaces of the MoS2 specimens were generally flat and smooth. However, the Raman data showed that the crystalline qualities of CVD-grown single-layer MoS2 at 800 °C and 850 °C were relatively similar to those of mechanically exfoliated MoS2 whereas the crystalline quality of the CVD-grown single-layer MoS_2 at 900 °C was lower. The CVD-grown single-layer MoS_2 exhibited higher friction than mechanically exfoliated single-layer MoS_2, which might be related to the crystalline imperfections in the CVD-grown MoS_2. In addition, the friction of CVD-grown single-layer MoS_2 increased as the CVD growth temperature increased. In terms of tribological properties, 800 °C was the optimal temperature for the CVD process used in this work. Furthermore, it was observed that the friction at the grain boundary was significantly larger than that at the grain, potentially due to defects at the grain boundary. This result indicates that the temperature used during CVD should be optimized considering the grain size to achieve low friction characteristics. The outcomes of this work will be useful for understanding the intrinsic friction characteristics of single-layer MoS2 and elucidating the feasibility of single-layer MoS_2 as protective or lubricant layers for micro- and nano-devices. | Dinh Le Cao KY Bien-Cuong TRAN KHAC Chinh Tam LE Yong Soo KIM Koo-Hyun CHUNG | 2018 | Friction2018，6，4： | 9 |
| 2 | Adherence and biofilm formation of staphylococcus epidermidis and mycobacterium tuberculosis on various spinal implants显示文摘 | Ha KY Chung YG Ryoo SJ | 2005 | Spine2005，30，1： | 1 |
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| 17 | Low-dose weekly docetaxel is as tolerable as pemetrexed in previously treated advanced non-small-cell lung cancer显示文摘 | Chung FT Lee KY Yf F | 2011 | Chemotherapy2011，57，2： | 1 |
| 18 | Current concepts in the mandibular condyle fracture management part If: open reduction versus closed reduction 显示文摘 | Choi KY Yang JD Chung HY | 2012 | Arch Plast Surg2012，39，4： | 1 |
| 19 | Cetuximab shows activity in colorectal cancer patients with tumors that do not express the epidermal growth factor receptor by immunohistochemistry 显示文摘 | Chung KY Shia J Kemeny NE | 2005 | J Clin Oncol2005，23，9： | 1 |
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