Chemical Analysis of Ultra-Thin DLC Films and Lubricant/DLC Interface Using Plasmonic Sensors
Chemical Analysis of Ultra-Thin DLC Films and Lubricant/DLC Interface Using Plasmonic Sensors
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DOI：
10.1115/isps2014-6908
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
M. Yanagisawa;Masahiro Kunimoto;T. Homma
中科院分区：
文献类型：
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作者：
M. Yanagisawa;Masahiro Kunimoto;T. Homma
一种新的等离子体传感器的技术潜力，它可以获得表面增强拉曼光谱与高灵敏度通过控制表面等离子体被证明为类金刚石（DLC）膜，润滑油膜，和亚纳米级磁盘上的DLC/润滑油界面的化学分析。在高信噪比条件下，可获得DLC薄膜和润滑DLC碳的拉曼光谱。在高信噪比条件下，也可获得润滑DLC碳的拉曼光谱。混合润滑剂（ADOH和Z-四醇）中苯基和羟基的拉曼峰的波数位移和强度变化表明，随着氮含量的增加，润滑剂分子中苯基与DLC表面的化学作用减弱，而羟基与含氮碳的化学作用增强。获得了氮化DLC膜的拉曼谱，其谱峰与密度泛函理论计算结果吻合较好。计算的键能表明羟基与氮化碳相互作用。Copyright © 2014 by ASME
The technical potential of a new plasmonic sensor, which can acquire surface-enhanced Raman spectra with high sensitivity by controlling surface plasmons is demonstrated for the chemical analysis of diamond-like carbon (DLC) films, lubricant films, and the DLC/lubricant interface on magnetic disks of sub-nanometer scale. The Raman spectra of thin DLC films and lubricated DLC carbon can be acquired with a high S/N ratio. Raman spectra of lubricated DLC carbon can also be acquired with the high S/N ratio. The wavenumber shift and intensity change of the Raman peaks of the phenyl and hydroxyl groups in the mixed lubricants (ADOH and Z-tetraol) show that the chemical interaction with the DLC surfaces of the phenyl group in the lubricant molecule decreases with increasing nitrogen content, whereas that of the hydroxyl group with the nitrogenated carbon increases. Raman spectra of nitrogenated DLC films are also acquired, the peaks show good agreement with density functional theory calculations. The calculated bonding energy indicates that the hydroxyl groups interact with the nitrogenated carbon.Copyright © 2014 by ASME