Time-resolved in situ nanoparticle size evolution during magnetron sputtering onto liquids

Abstract

The evolution of particle size is monitored in situ and in real-time during and after the sputtering of Ag atoms onto silicone oil using Light Extinction Spectroscopy. Aggregation and growth of nanoparticles occur both at the interface and inside the oil during and after the sputtering process.

Practical Challenges in Nanofluid Convective Heat Transfer Inside Silicon Microchannels

“…Figure 2 illustrates the schematic of the flow loop and its integration with a Light Extinction Spectroscopy (LES) system. The LES technique is capable of measuring the size distribution of nanoparticles in situ and in real time [42][43][44][45]. In this work, it is operated to evidence the presence of nanoparticle clusters or any loss of the nanofluid stability.…”

Detailed discussion on the structure of alloy nanoparticles synthesized via magnetron sputter deposition onto liquid poly(ethylene glycol)

“… 36 Results for Ag sputtered onto silicon oil based on in situ light extinction spectroscopy technique also suggests that stirring promoted the formation of smaller NPs although it did not influence the final size. 47 By keeping the temperature of the targets and PEG unchanged, a higher discharge current resulted in bigger NPs. 45 This can be caused by a bigger initial size of particles landing on the liquid due to more collision/growth in the gas phase when using a higher applied current.…”