Direct laser writing of nanodiamond films from graphite under ambient conditions

Qiong Nian, Yuefeng Wang, Yingling Yang, Ji Li, Martin Y. Zhang, Jiayi Shao, Liang Tang, Gary J. Cheng

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Synthesis of diamond, a multi-functional material, has been a challenge due to very high activation energy for transforming graphite to diamond, and therefore, has been hindering it from being potentially exploited for novel applications. In this study, we explore a new approach, namely confined pulse laser deposition (CPLD), in which nanosecond laser ablation of graphite within a confinement layer simultaneously activates plasma and effectively confine it to create a favorable condition for nanodiamond formation from graphite. It is noteworthy that due to the local high dense confined plasma created by transparent confinement layer, nanodiamond has been formed at laser intensity as low as 3.7 GW/cm2, which corresponds to pressure of 4.4 GPa, much lower than the pressure needed to transform graphite to diamond traditionally. By manipulating the laser conditions, semi-transparent carbon films with good conductivity (several kΩ/Sq) were also obtained by this method. This technique provides a new channel, from confined plasma to solid, to deposit materials that normally need high temperature and high pressure. This technique has several important advantages to allow scalable processing, such as high speed, direct writing without catalyst, selective and flexible processing, low cost without expensive pico/femtosecond laser systems, high temperature/vacuum chambers.

Original languageEnglish (US)
Article number6612
JournalScientific Reports
Volume4
DOIs
StatePublished - Oct 20 2014
Externally publishedYes

ASJC Scopus subject areas

  • General

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    Nian, Q., Wang, Y., Yang, Y., Li, J., Zhang, M. Y., Shao, J., Tang, L., & Cheng, G. J. (2014). Direct laser writing of nanodiamond films from graphite under ambient conditions. Scientific Reports, 4, [6612]. https://doi.org/10.1038/srep06612