Herein, a controllable, customisable and time-efficient fabrication method for producing C, Mg and hybrid Mg-C nanoparticles (NPs) of various sizes (1 – 2500 nm) via Pulsed Laser Ablation in Liquid (PLAL) was demonstrated. Mg and C NPs provide high electrical conductivity, large surface area, high reactivity, properties which enable applications such as device size reduction for microelectronics and tailored drug delivery. NPs are conventionally synthesised via wet chemistry techniques (e.g. thermal decomposition and sol-gel method) which often require long hours of processing, hazardous chemicals, the need to purify the NPs after synthesis, highly skilled chemists and sophisticated apparatus. PLAL involves the use of a laser to irradiate a target submerged in a liquid to produce NPs. This method is straightforward, requires low-powered pulsed-lasers and can provide high production rates. Currently, PLAL research involves the investigation of laser parameters (e.g., fluence or pulse width) on the resulting colloid and these were investigated for C and Mg colloid formation and new knowledge was published in peer-reviewed journals. DI water produced smaller C NPs (10 – 82 nm) than ethanol (60 – 143 nm) and the magnesium-based solution (263 – 1389 nm). A red shift of UV-Vis absorbance (from 204 to 300 nm) was observed for Mg NPs when the liquid medium was changed from IPA to DI water. Furthermore, the inkjet printing (80 prints) of the hybrid Mg-C NPs (patent pending) reduced the resistivity of paper from 100 down to < 75 Ω/sq, thereby demonstrating their potential use in paper electronics. Monte Carlo simulations demonstrated that a doubling in the photon energy from 100 eV to 200 eV caused an over 6-fold increase in the PLAL system kinetic energy, a key component of the PLAL process.