One-step method to enhance biotribological properties and biocompatibility of DLC coating by ion beam irradiation  

作　　者：Yuzhen LIU Kelun ZHANG Jae-Ho HAN Youn-Hoo HWANG Shusheng XU Dae-Eun KIM 

机构地区：[1]Department of Mechanical Engineering,Yonsei University,Seoul 03722,Republic of Korea [2]Department of Dermatology and Cutaneous Biology Research Institute,Yonsei University College of Medicine,Seoul 03722,Republic of Korea [3]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Friction》2022年第7期1114-1126,共13页摩擦（英文版）

基　　金：This study was supported by National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(No.2020R1A2C2004714);funding from the State Key Laboratory of Solidification Processing in NWPU(No.SKLSP202002).

摘　　要：A one-step method was developed to create a highly biocompatible micropatterned surface on a diamond-like carbon(DLC)through irradiation with a nitrogen ion beam and thus enhance the biocompatibility of osseointegrated surfaces and biotribological performance of articular surfaces.The biocompatibility and biotribological mechanisms were analyzed in terms of the structure and morphology of DLC.It was demonstrated that a layer enriched in sp^(3) C-N bonds was formed on the surface of the DLC after nitrogen ion beam irradiation.Moreover,with an increase in the radiation dose,the content of sp^(3) C-N on the DLC surface increased significantly,and the biocompatibility was positively correlated with it.The adhesion of the MC3T3 osteoblasts increased significantly from 32%to 86%under an irradiation dose of 8×10^(15) ions/cm^(2).In contrast,the micropattern had a significant negative effect on the adhesion of the osteoblasts as it physically hindered cell expansion and extension.The micropattern with a depth of 37 nm exhibited good friction properties,and the coefficient of friction was reduced by 21%at relatively high speeds.

关 键 词：ion beam irradiation BIOCOMPATIBILITY diamond-like carbon(DLC) in-vivo MICROPATTERN biotribological performance 

分 类 号：TH117[机械工程—机械设计及理论]