本工作通过原位原子力显微镜Peak force tapping模式对石墨烯和迈科烯(MXene)的结构稳定性进行了比较。当原位观察二维材料还原氧化石墨烯(rGO)时,rGO形貌基本不随时间发生改变;而当原位观察二维材料迈科烯V_(2)C时,V_(2)C表面发生纳米...本工作通过原位原子力显微镜Peak force tapping模式对石墨烯和迈科烯(MXene)的结构稳定性进行了比较。当原位观察二维材料还原氧化石墨烯(rGO)时,rGO形貌基本不随时间发生改变;而当原位观察二维材料迈科烯V_(2)C时,V_(2)C表面发生纳米刻蚀现象,其形貌表面积随扫描时间逐渐减小。利用数据处理软件分析面积变化,计算出纳米刻蚀的速率,发现增大峰值力,平均纳米刻蚀速率随之增大,且在大气环境中的刻蚀速率大于在手套箱(Ar气氛围,H_(2)O和O_(2)含量小于1×10^(-6))中的速率,说明大气中的水分对材料的稳定性有影响,会加快纳米刻蚀的速率。本研究表明原子力显微镜Peak force tapping模式可以用来快速表征二维材料的稳定性。展开更多
Cardiovascular system plays an important role in the medical curriculum.How to enable medical students better learn and grasp this part of knowledge is a task and mission faced by teachers.In recent years,with the dev...Cardiovascular system plays an important role in the medical curriculum.How to enable medical students better learn and grasp this part of knowledge is a task and mission faced by teachers.In recent years,with the development and reform of medical teaching,the application of integrated teaching is more and more popular in domestic medical schools.Shanghai Jiao Tong University School of Medicine has also adopted the integrated teaching.As pathology teachers,we take the integrated teaching of cardiovascular system course as an example to introduce our experience.展开更多
文摘本工作通过原位原子力显微镜Peak force tapping模式对石墨烯和迈科烯(MXene)的结构稳定性进行了比较。当原位观察二维材料还原氧化石墨烯(rGO)时,rGO形貌基本不随时间发生改变;而当原位观察二维材料迈科烯V_(2)C时,V_(2)C表面发生纳米刻蚀现象,其形貌表面积随扫描时间逐渐减小。利用数据处理软件分析面积变化,计算出纳米刻蚀的速率,发现增大峰值力,平均纳米刻蚀速率随之增大,且在大气环境中的刻蚀速率大于在手套箱(Ar气氛围,H_(2)O和O_(2)含量小于1×10^(-6))中的速率,说明大气中的水分对材料的稳定性有影响,会加快纳米刻蚀的速率。本研究表明原子力显微镜Peak force tapping模式可以用来快速表征二维材料的稳定性。
文摘Cardiovascular system plays an important role in the medical curriculum.How to enable medical students better learn and grasp this part of knowledge is a task and mission faced by teachers.In recent years,with the development and reform of medical teaching,the application of integrated teaching is more and more popular in domestic medical schools.Shanghai Jiao Tong University School of Medicine has also adopted the integrated teaching.As pathology teachers,we take the integrated teaching of cardiovascular system course as an example to introduce our experience.
