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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 | Preparation of chitosan self-aggregates as a gene delivery system 显示文摘 | Lee KY Kwon IC Kim YH | 1998 | J Controlled Release1998，51，23： | 2 |
| 3 | Up-regulated CNTF plays a protective role for retrograde degeneration in the axotomized rat retina显示文摘 | Ju WK Kim KY Lee MY Hofmann HD Kirsch M Cha JH | 2000 | Neuroreport2000，11，17： | 1 |
| 4 | Assessment of risk factors for Korean children with Kawasaki dis- ease显示文摘 | Kim JJ Hong YM Yun SW Han MK Lee KY Song MS | 2012 | Pediatr Cardiol2012，33，4： | 1 |
| 5 | The role of matrix metalloprotein- ase 9 in early neurological worsening of acute lacunar infarction 显示文摘 | Kim YS Lee KY Koh SH | 2006 | Eur Neuro2006，55，1： | 1 |
| 6 | Solvothermal-assisted hy- bridization between reduced graphene oxide and lithium metal oxides: A facile route to graphene-based composite materials 显示文摘 | Han SY Kim IY Jo KY | 2012 | J Phys Chem C2012，116，13： | 1 |
| 7 | Skin rejuvenation by microneedle fractional radiofrequency treatment in Asian skin;Clinical and histological analysis显示文摘 | Seo KY Yoon MS Kim DH | | 0，，08： | 1 |
| 8 | Pilot study of the effcacy of 578 nm copper bromide laser combined with intralesional corticosteroid in- jection for treatment ofkeloids and hypertrophic scars 显示文摘 | Son IP Park KY Kim B | 2014 | Ann Der- matol2014，26，2： | 1 |
| 9 | The association be- tween kidney function, coronary artery disease, and clinical outcome in patients undergoing coronary angiography 显示文摘 | Na KY Kim CW Song YR | 2009 | J Korean Med Sci2009，，： | 1 |
| 10 | Intraoperative radiofrequency ablation for metastatic spine disease: report of 4 cases and review显示文摘 | Ha KY Kim YH Yoo TW | 2013 | Eur J Orthop Surg Traumatol2013，11，232： | 1 |
| 11 | Upregulation of ciliary neurotrophic factor in reactive Muller cells in the rat retina following optic nerve transection 显示文摘 | Chun MH Ju WK Kim KY | 2000 | Brain Res2000，868，2： | 1 |
| 12 | Protein release microparticles ·based on the blend of poly(D, L-lactic-co-glycolic) and oligo-ethyl ene glycol grafted poly (L-lactide)显示文摘 | Choi SH Kim CH etal | 2001 | J Controlled Release2001，76，3： | 1 |
| 13 | Treatment results for gastric cancer:12 year's experience at a single institute in Korea显示文摘 | Par CH Song KY Kim SN | 2008 | Eur J Surg Oncol2008，34，1： | 1 |
| 14 | The duration of intrathecal bupivacaine mixed with lidocaine显示文摘 | Lee SJ Bai SJ Lee JS Kim WO Shin YS Lee KY | 2008 | Anesth Analg2008，107，： | 1 |
| 15 | A comparative study of voiding and sexual function after total mesorectal excision with autonomic nerve preservation for rectal cancer:laparoscopic versus robotic surgery显示文摘 | Kim JY Kim NK Lee KY | | 0，，08： | 1 |
| 16 | Visceral fat thickness measured by uhrasonography can estimate not only visceral obesity but also risks of cardiovascular and metabolic diseases 显示文摘 | Kim SK Kim H J Hur KY | 2004 | Am J Clin Nutr2004，79，4： | 1 |
| 17 | Multi-Objective Optimization of an Axial Compressor Blade显示文摘 | SAMAD A KIM KY | 2008 | Journal of Mechanical Science and Technology2008，22，5： | 1 |
| 18 | Laser modulation of heat and cap- saicin receptor TRPV1 leads to thermal antinociception 显示文摘 | Ryu J J Yoo S Kim KY | 2010 | J Dent Res2010，89，12： | 1 |
| 19 | Heat shock pretreatment reduces intestinal injury in a neonatal rat model of early necrotizing enteroco- litis显示文摘 | Kim EK Lee KY Lee HJ | 2012 | Neonatology2012，103，1： | 1 |
| 20 | Genetic Association Study of the Alpha 7 Nicotinic Receptor (CHRNA7) with the development of Schizophrenia and Bipolar disorder in Korean Population显示文摘 | Joo E J Lee KY Kim HS | 2010 | Psychiatry Investig2010，7，3： | 1 |
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