title: Laser assisted synthesis of carbon nanoparticles with controlled viscosities for printing applications.
abstract: High-quality carbon nanoparticles with controlled viscosity and high aqueous stability were prepared by liquid-phase laser ablation of a graphite target in deionized water. The size distribution was found to vary from 5nm to 50nm with mean size of 18nm, in the absence of any reducing chemical reagents. Efficient generation of short chain polyynes was recorded for high laser repetition rates. Homogeneous and stable nanoparticle suspensions with viscosities ranging from 0.89 to 12mPa.s were obtained by suspending the nanoparticles in different solvent mixtures such as glycerol-water and isopropanol-water. Optical properties were investigated by absorption and photoluminescence spectroscopy. Raman spectroscopy confirmed graphitic-like structure of nanoparticles and the surface chemistry was revealed by Fourier-transform infrared spectroscopy demonstrating sufficient electrostatic stabilization to avoid particle coagulation or flocculation. This paper present an exciting alternative method to engineer carbon nanoparticles and their potential use as a ligand-free nano-ink for ink jet printing (jetting) applications.
authors.affiliation: Advanced Processing Technology Research Centre, Dublin City University, Ireland; Irish Separation Science Cluster, Dublin City University, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Ireland. Electronic address: komal.bagga@dcu.ie.
authors.forename: K
authors.initials: K
authors.lastname: Bagga
authors.affiliation: Advanced Processing Technology Research Centre, Dublin City University, Ireland; Irish Separation Science Cluster, Dublin City University, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Ireland; National Centre for Plasma Science & Technology (NCPST), Dublin City University, Ireland.
authors.forename: R
authors.initials: R
authors.lastname: McCann
authors.affiliation: Advanced Processing Technology Research Centre, Dublin City University, Ireland; Irish Separation Science Cluster, Dublin City University, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.affiliation: Irish Separation Science Cluster, Dublin City University, Ireland.
authors.forename: A
authors.initials: A
authors.lastname: Stalcup
authors.affiliation: Advanced Processing Technology Research Centre, Dublin City University, Ireland; Irish Separation Science Cluster, Dublin City University, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Vázquez
authors.affiliation: Advanced Processing Technology Research Centre, Dublin City University, Ireland; Irish Separation Science Cluster, Dublin City University, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Ireland; National Centre for Plasma Science & Technology (NCPST), Dublin City University, Ireland.
authors.forename: D
authors.initials: D
authors.lastname: Brabazon
keywords: Absorption spectroscopy; Carbon nanoparticles; High frequency laser; Laser ablation in liquid; Nano-ink; Polyynes; Printing applications; Transmission electronic microscopy; Viscosity