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Controllable preparation of bare nano-diamonds through femtosecond laser ablation in liquid.

Authors :
Hao, Juan
Li, Shuai
Dong, Meng
Source :
Colloids & Surfaces A: Physicochemical & Engineering Aspects. Jan2025:Part 1, Vol. 705, pN.PAG-N.PAG. 1p.
Publication Year :
2025

Abstract

The preparation and modulation of bare nano-diamonds (NDs) are of great significant for further investigation into their intrinsic structures, exploring more underlying properties, unlocking latent performances and exploiting more extensive applications. In this study, bare NDs have been successfully synthesized and modulated through 343 nm femtosecond laser ablation in liquids (LAL). When laser scanning point interval (LSPI) was reduced from 4 μm to 0.5 μm, the average size of NDs decreased from 4.1 nm to 3 nm. While it remained around 3.2 nm for NDs obtained at different energies. Notable, sp3-C within NDs accounted for above 71 % at laser energy of diamond damage threshold (118 mW), and then transformed into sp2-C as laser energy increased. NDs prepared in water and ethanol differed in terms of their size distribution, intrinsic structure, and surface state. NDs@ethanol sized 3.8 nm exhibited higher sp3/sp2 ratio and more complex surface states than NDs@water sized 3.3 nm. These findings not only can provide valuable guidance for precise regulation of NDs preparation, but also can offer diverse structural NDs for exploring their potential applications. [Display omitted] [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09277757
Volume :
705
Database :
Academic Search Index
Journal :
Colloids & Surfaces A: Physicochemical & Engineering Aspects
Publication Type :
Academic Journal
Accession number :
181496055
Full Text :
https://doi.org/10.1016/j.colsurfa.2024.135623