Plasma immersion ion implantation(PIII) was used to fabricate micro/nano structures on monocrystalline Si surfaces with different ratios of mixed gases(SF_6/O_2). The micro/nano structures on the surfaces of the sampl...Plasma immersion ion implantation(PIII) was used to fabricate micro/nano structures on monocrystalline Si surfaces with different ratios of mixed gases(SF_6/O_2). The micro/nano structures on the surfaces of the sample were characterized by scanning electron microscopy(SEM) and atomic force microscopy(AFM). The results showed that with increasing ratio of mixed gases(SF_6/O_2), the height of the micro/nano structures first increased and then decreased. Contact-angle measurements indicated that the surfaces' micro/nano structures have an obvious effect on the contact-angle, and could cause a change in surface wettability. The theoretical analysis of contact-angle showed that the Wenzel and Cassie theories cannot predict the contact-angle of a roughened surface accurately, and should be corrected for practical applications using an actual model. Moreover, the contact-angle first increased and then decreased with increasing ratio of mixed gases(SF_6/O_2), which is in accordance with the change of the height of micro/nano structures.展开更多
目的:探讨等离子注入技术(Plasma immersion ion implantation,PIII)对膨体聚四氟乙烯(ePTFE)膜改性后表面性能以及对细菌生存状态的影响。方法:采用氧等离子注入技术(PⅢ)对ePTFE膜表面处理,获得改性ePTFE膜,利用扫描电镜(SEM)观察改性...目的:探讨等离子注入技术(Plasma immersion ion implantation,PIII)对膨体聚四氟乙烯(ePTFE)膜改性后表面性能以及对细菌生存状态的影响。方法:采用氧等离子注入技术(PⅢ)对ePTFE膜表面处理,获得改性ePTFE膜,利用扫描电镜(SEM)观察改性ePTFE膜和未处理膜的表面形貌,体外培养变形链球菌,观察改性前后各组膜作体外细菌生存状态变化。结果:与未处理ePTFE膜相比,改性ePTFE膜表面形貌、亲水性发生改变。荧光染色后观察长脉冲组表面的细菌最少;短脉冲组膜表面粘附的细菌密集,形成生物膜;空白组可见少量死菌和活菌粘附于ePTFE膜上。结论:长脉冲PⅢ改性ePTFE膜后有良好的抗细菌粘附能力。展开更多
目的:评价O2-PⅢ表面处理聚四氟乙烯(PTFE)膜后,其上培养生长的成骨细胞生物学相容性变化。方法:O2等离子体浸入离子植入技术(plasma immersion ion implantation,PⅢ)处理PTFE膜表面,进行膜表面改性;O2-Ⅲ处理组和未处理组的PTFE膜分...目的:评价O2-PⅢ表面处理聚四氟乙烯(PTFE)膜后,其上培养生长的成骨细胞生物学相容性变化。方法:O2等离子体浸入离子植入技术(plasma immersion ion implantation,PⅢ)处理PTFE膜表面,进行膜表面改性;O2-Ⅲ处理组和未处理组的PTFE膜分别通过扫描电镜(SEM)观察表面形态、表面接触角测定分析其亲水性;分别在2组膜上接种成骨细胞,6h后SEM观察成骨细胞贴附情况,并分别于6、24、48h后4',6二脒基-2-苯吲哚盐酸(DAPI)核染色,荧光显微镜下观察成骨细胞的数量,进一步评估2种膜表面对成骨细胞生物相容性的影响。结果:O2-PIII处理改变了PTFE膜表面形态和增强了其亲水性。2组样本表面接种成骨细胞后SEM及荧光照片显示:O2-PⅢ处理组相对于未处理组更利于成骨细胞的吸附和增殖。结论:O2-PⅢ处理后可提高PTFE膜表面成骨细胞的相容性,可望在临床实际应用中促进组织的修复和再生。展开更多
基金financially supported by NSFC Project(Grant No.51376022)
文摘Plasma immersion ion implantation(PIII) was used to fabricate micro/nano structures on monocrystalline Si surfaces with different ratios of mixed gases(SF_6/O_2). The micro/nano structures on the surfaces of the sample were characterized by scanning electron microscopy(SEM) and atomic force microscopy(AFM). The results showed that with increasing ratio of mixed gases(SF_6/O_2), the height of the micro/nano structures first increased and then decreased. Contact-angle measurements indicated that the surfaces' micro/nano structures have an obvious effect on the contact-angle, and could cause a change in surface wettability. The theoretical analysis of contact-angle showed that the Wenzel and Cassie theories cannot predict the contact-angle of a roughened surface accurately, and should be corrected for practical applications using an actual model. Moreover, the contact-angle first increased and then decreased with increasing ratio of mixed gases(SF_6/O_2), which is in accordance with the change of the height of micro/nano structures.
文摘目的:探讨等离子注入技术(Plasma immersion ion implantation,PIII)对膨体聚四氟乙烯(ePTFE)膜改性后表面性能以及对细菌生存状态的影响。方法:采用氧等离子注入技术(PⅢ)对ePTFE膜表面处理,获得改性ePTFE膜,利用扫描电镜(SEM)观察改性ePTFE膜和未处理膜的表面形貌,体外培养变形链球菌,观察改性前后各组膜作体外细菌生存状态变化。结果:与未处理ePTFE膜相比,改性ePTFE膜表面形貌、亲水性发生改变。荧光染色后观察长脉冲组表面的细菌最少;短脉冲组膜表面粘附的细菌密集,形成生物膜;空白组可见少量死菌和活菌粘附于ePTFE膜上。结论:长脉冲PⅢ改性ePTFE膜后有良好的抗细菌粘附能力。
文摘目的:评价O2-PⅢ表面处理聚四氟乙烯(PTFE)膜后,其上培养生长的成骨细胞生物学相容性变化。方法:O2等离子体浸入离子植入技术(plasma immersion ion implantation,PⅢ)处理PTFE膜表面,进行膜表面改性;O2-Ⅲ处理组和未处理组的PTFE膜分别通过扫描电镜(SEM)观察表面形态、表面接触角测定分析其亲水性;分别在2组膜上接种成骨细胞,6h后SEM观察成骨细胞贴附情况,并分别于6、24、48h后4',6二脒基-2-苯吲哚盐酸(DAPI)核染色,荧光显微镜下观察成骨细胞的数量,进一步评估2种膜表面对成骨细胞生物相容性的影响。结果:O2-PIII处理改变了PTFE膜表面形态和增强了其亲水性。2组样本表面接种成骨细胞后SEM及荧光照片显示:O2-PⅢ处理组相对于未处理组更利于成骨细胞的吸附和增殖。结论:O2-PⅢ处理后可提高PTFE膜表面成骨细胞的相容性,可望在临床实际应用中促进组织的修复和再生。
